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The ceramic foam filter for casting is white02022-05-18 23:24:54
Aluminium 7075 Ceramic Foam Filtering System is used in aluminum foundries with low price and stable quality. Swedish Aluminum said that China’s aluminum alloy ceramic filter can provide a stable supply cycle for casting. Swedish Aluminum Corporation said that ceramic foam filters are very important for the purification of aluminum melt. The so-called purification treatment is to take various measures to reduce unnecessary gas and solid matter in the aluminum melt to the allowable range to ensure that the performance of the material meets the standard or some special requirements. As the adsorbent continues to accumulate and precipitate, the screen size of the filter becomes smaller, and the particle size of the adsorbable inclusions also becomes smaller, thereby improving the filtering effect. At present, the commonly used filters are glass fiber filters, ceramic plates, ceramic tubes and foam ceramic filters. Aluminium 7075 Ceramic Foam Filtering System is a commonly used filter tool in the aluminum and non-ferrous alloy smelting industry. The ceramic foam filter for casting is white and made of high-purity alumina (Al2O3). The filter provides deep filtration to remove a large amount of impurities in the aluminum melt and works at dumping temperatures up to 2000°F, while the filter screen provides thorough and deep filtration to remove molten aluminum. Aluminum or non-impurity. aluminum. The black alloy flows. It has excellent thermal shock resistance while maintaining effective impurity removal through continuous and thorough filtration. After the melt is purified by the online degassing unit device, there are still some insoluble inclusions in the molten aluminum, and effective filtering measures must be taken to remove the tiny inclusions in the molten aluminum in one step. Foam ceramic is a new type of ceramic foam filter material developed in recent years. The ceramic filter material is a ceramic slurry composed of aluminum oxide and chromium oxide, molded by polyurethane foam, and then dried and sintered. The porosity is as high as 80% ~ 90%. 
Aluminum alloy casting process ceramic foam filter02022-03-03 17:40:25
Ceramic foam filter Suppliers Inalum effectively removes large inclusions in molten aluminum, adsorbs micron-sized particles of fine inclusions, and plays a role in improving surface quality, improving product performance, improving microstructure, and increasing output. Aluminum alloy casting process ceramic foam filter performance It is generally understood as a combination of outstanding performance in the process of filling, crystallization and cooling. Fluidity, shrinkage, air tightness, casting stress, coiling. These characteristics of aluminum alloy depend on the composition of the alloy, but also related to casting factors, alloy heating temperature, mold complexity, gate riser system, gate shape, etc. Fluidity refers to the ability of the alloy fluid to fill the mold. The measurement of fluidity determines whether the alloy can cast complex castings. Eutectic alloys have better fluidity than aluminum alloys. There are many factors that affect fluidity, especially the composition, temperature and solid particles of contaminants such as metal oxides and metal compounds in the alloy liquid. However, the fundamental external factors are pouring temperature and pouring pressure (commonly known as pouring). head). A sort of In actual production, in addition to strengthening the smelting process (refining and slag removal), it is also necessary to improve the formability (sand mold permeability, metal release and temperature) without affecting the alloy. On the premise of ensuring the quality of casting, increase the casting temperature to ensure the fluidity of the alloy. A sort of Ceramic foam Filter Suppliers Inalum purchase website www.adtechamm.com The choice of agents must conform to the company’s development strategy. AdTech is in a period of rapid development. He chose aggressive agents and agents who are actively developing business. If the agent has been in the local business for more than 10 years, then we will give priority to you. Indonesian agents should sell Ceramic foam filters like this A. Before developing new markets, clarify your channel goals and regional goals, and plan which foundries will sell products. B. Visit various channels of the target market and ask the OEM purchasing personnel. Recently, Indonesia’s Bintan Alumina Alumina Phase 1 million tons project completed the alumina output of 86,500 tons in September 2021, achieving the target of reaching the standard and output, and the energy consumption and product quality have reached the international advanced level. The alumina project in Bintan Nanshan Industrial Park in Indonesia is implemented by the company’s indirect overseas subsidiary BAI. The construction site of the project is located on Bintan Island, Riau Islands Province, Indonesia. The planned alumina production capacity of the project is 2 million tons per year, which will be constructed in two phases. After the completion of the project, the company will be able to use Indonesia’s rich local bauxite and coal resources to produce alumina, achieve lower-cost alumina production capacity expansion, enhance the company’s profitability, and improve the company’s ability to resist risks. 
Features of aluminum alloy ceramic foam filter for casting02022-05-25 22:59:35
Features of aluminum alloy ceramic foam filter for casting1. High air permeability, good strength, good thermal shock resistance, stable quality, no matter the large size or small volume ppi product, there is no loss of impurities under high temperature.2. Advantages compared with traditional filter materials: thermal stability and chemical stability at high temperatures, to avoid chemical reactions with molten metal after filtration.3. Pure ceramic composite materials have high porosity and good high temperature mechanical strength.4. Fully open pores, ceramic particles or powder will not be lost during the filtration process (snowfall).5. Convenient operation and energy saving. Make the metal flow smoothly, avoid sputtering and reflow, thereby improving the surface quality of castings, preventing hole deformation, and ultimately reducing the rejection rate. Aluminium 7075 Molten Metal Filtration is a very effective tool for Aluminium 7075 purification to obtain the purity of molten metal in the casting process. It is characterized by good thermal conductivity, good stability, and resistance to sudden changes in temperature.The foam aluminum ceramic filter adopts the adsorption principle, which can effectively remove large and small impurity particles without falling debris, effectively reducing the pollution of molten aluminum.Excellent thermal shock resistance, improve the corrosion resistance of molten metal, can stabilize the flow of aluminum, facilitate the filling of castings, reduce slag and pinhole defects, and improve the quality and productivity of aluminum alloys. Ceramic foam filtration methodCeramic foam filter is made by injecting a mixture of alumina and phosphate into sponge plastic, and then drying to volatilize the sponge plastic. It can also be called a microporous reticulated ceramic foam sheet with a sponge-like structure.When the aluminum melt flows along the tortuous channel and the pores of the filter plate, the inclusions deposited on the inner surface contact the pores, inertia, flow force, and retained filter material, and maintain the surface and gap of the internal pores.The inclusions remain in the filter material and are separated from the molten aluminum.Foam ceramic filter plate is easy to use, good filtering effect, low price, and it has been widely used in the world. Filter the molten metal with a ceramic foam filter.The thickness of the foam ceramic filter plate is generally 50mm, the length and width are 200~600mm, and the porosity is as high as 8%. The filtration does not require a high-pressure water head, the initial size is 100-150mm, the latter only needs 2-10mm. The ceramic foam filter is surrounded by a gasket between the filter and the filter box to prevent molten aluminum from leaking from the interface.Our ceramic foam filters use two different types of sealing gaskets, fiber cotton gaskets and expanded cotton materials. 
foundry and material industries. Casting with a 30ppi foam ceramic filter12022-06-29 02:03:27
Inclusions and gases in metals significantly affect the strength, fatigue resistance, corrosion resistance, and stress corrosion cracking properties of the material. Effectively controlling the oxide inclusions in the melt and improving the quality of cast slabs and rolled sheets have become the common goals pursued by various countries' metallurgical, foundry and material industries. Casting with a 30ppi foam ceramic filter can remove most of the inclusions in the aluminum alloy melt. Aluminum and its alloys are easy to oxidize and absorb gas during the smelting and pouring process, and defects such as inclusions and pores are easily formed during the die-casting process, which is unfavorable to the alloy structure, thereby reducing the mechanical properties and corrosion resistance of the alloy, and reducing the yield. Therefore, reasonably controlling the smelting process and improving the quality of aluminum melt is the key to improving the quality of aluminum die castings. Ceramic foam filters for casting can filter micro-oxidized inclusions with good effect and low cost. Easy to use. Suitable for all kinds of molten aluminum and aluminum alloy. the result shows The yield rate of 3003 alloys printed boards increased by 9% The average weight between the broken ends of the 1145 alloy capacitor aluminum foil has increased by 45% 
foundry and material industries. Casting with a 30ppi foam ceramic filter12022-06-29 02:02:52
Inclusions and gases in metals significantly affect the strength, fatigue resistance, corrosion resistance, and stress corrosion cracking properties of the material. Effectively controlling the oxide inclusions in the melt and improving the quality of cast slabs and rolled sheets have become the common goals pursued by various countries' metallurgical, foundry and material industries. Casting with a 30ppi foam ceramic filter can remove most of the inclusions in the aluminum alloy melt. Aluminum and its alloys are easy to oxidize and absorb gas during the smelting and pouring process, and defects such as inclusions and pores are easily formed during the die-casting process, which is unfavorable to the alloy structure, thereby reducing the mechanical properties and corrosion resistance of the alloy, and reducing the yield. Therefore, reasonably controlling the smelting process and improving the quality of aluminum melt is the key to improving the quality of aluminum die castings. Ceramic foam filters for casting can filter micro-oxidized inclusions with good effect and low cost. Easy to use. Suitable for all kinds of molten aluminum and aluminum alloy. the result shows The yield rate of 3003 alloys printed boards increased by 9% The average weight between the broken ends of the 1145 alloy capacitor aluminum foil has increased by 45% 
Ceramic foam filter is white or milky white.02022-03-09 21:50:36
Ceramic foam filter Inalum is mainly used in the filtration process of aluminum and alloys in foundries and foundries. It has excellent resistance to molten aluminum erosion and corrosion, and can effectively remove inclusions. These impurities are easy to produce bubbles and inclusions in the slab, which seriously affect the purity of the metal melt, and then affect the processing performance, mechanical properties, corrosion resistance and appearance quality of the product. Ceramic foam filter is white or milky white. Through physical adsorption and chemical action, it is suitable for the production of high-quality, high-demand aluminum and aluminum alloy purification processes. It can effectively remove various oxidized inclusions generated during the aluminum smelting process, thereby reducing casting defects, improving casting quality, and providing high- High-quality materials for further processing. Filters in aluminum plants should be preheated before use. The main features of Ceramic foam filter Inalum are as follows 1. The filtration accuracy covers fine filtration and micro filtration. 2. High mechanical strength, stable chemical performance, good wear resistance, low resistance and anti-clogging. 3. High efficiency, high output, beautiful arrangement of filter apertures, uniform and neat. Ceramic foam filters,Ceramic Filter Plate,Porous Aluminum plate,Silicon Carbide Ceramic Foam Filter,Alumina Ceramic Filter,Alumina Foam Filters,Molten Metal Filtration,Cast House Filter,casting filter. ADTECH focus on Metallurgical Material ADTECH is one pioneer following by the International Enterprise, who keeps focusing on the manufacture of the metallurgical material. 1.Ceramic Foam Filter 2.Degassing Unit 3.Filter Box 4.Hot-top casting series 5.Roll casting nozzle 6.Flux series 7.Other Metallurgical Material PT Indonesia Asahan Aluminum (Inalum) announced that it will improve its aluminum smelting furnace technology with the help of three EPC companies, SAMI, PT Waskita Karya (Persero) and PT Unefeco. The news was released after Sophia Issabella Watimena, executive director of PT Inalum (Persero) in Kuala Tanjung, officially announced the news. At the same time, the addition of improvement items will increase the operating current of the smelting furnace to 235 kA instead of 193 kA. Inalum improves its aluminum smelting furnace technology; seeks support from 3 EPC companies Improvements will be implemented in electrolysis cell 1 and up to 170 furnaces, thereby increasing Inalum’s aluminum production capacity by 25,000 tons per year. Sophia Issabella Watimena said, “With the technological improvement of electrolytic cell 1 with as many as 170 furnaces, Inalum’s production capacity is expected to increase by 25,000 tons of aluminum per year.” He added that in addition to this, Inalum is currently undertaking other development projects, such as the construction of a smelter-grade alumina refinery in Mempawah, West Kalimantan, and the feasibility study process for the construction of a CPC plant. SAMI CEO Ma Ning praised Inalum: “We are very pleased to cooperate with Inalum on the improvement of aluminum smelting furnace technology. We believe that the good cooperation between the participating companies, then the aluminum smelting furnace technology improvement project can be achieved as expected Like that.” 
Ceramic filter out manufacturing facility produces ceramic foam filter out02022-06-23 01:44:20
Ceramic filter out manufacturing facility produces ceramic foam filter out, which is used to clear out solid impurities contained in molten aluminum. The removal of entrained solids from the liquid is accomplished with the aid of passing the stable-weighted down aluminum liquid through a porous clear-out medium that does not skip thru the solids. Molten aluminum commonly includes entrained solids, which might be harmful to the final cast steel product. those entrained solids normally have the subsequent assets. some are alumina particles, the floating oxide layer on the floor sucks them into the liquid flow. a number of the entrained debris are fragments from the furnace lining, conveying trough, and different elements of the molten aluminum processing equipment, that are eroded and entrained within the furnace. inside the flowing aluminum move, a few debris are precipitates of insoluble impurities, along with intermetallic compounds, borides, carbides, or different aluminum compounds (which include chlorides). whilst these impurities appear inside the very last solid product after the molten aluminum has solidified, they can reason the ductility of the very last product to lower or the completing traits of the very last product to be negative. Ceramic filter manufacturers e-mail:[email protected] The ceramic foam filter out factory impregnates the foam cloth with the foam cloth to coat the mesh with it and essentially fills the voids with it. The impregnated cloth is then compressed to discharge about 80% of the slurry, and the balance is lightly allotted all through the froth cloth, preferably, so that some holes are blocked in a uniformly allotted manner to boom the degree of tortuosity. The compression is released in order that the net remains included through the slurry and the fabric is dried. The dried material is then heated to burn out the flexible natural foam first, and then the ceramic coating is sintered to provide molten ceramic foam filters with a plurality of interconnected voids surrounded via a bonded or fused ceramic mesh constructed by using the bendy foam. 
porous ceramic filter for casting 0adtech122022-07-01 02:58:33
porous ceramic filter For Casting products can effectively remove various impurities in molten aluminum. Sealing ceramic fiber gaskets are attached around the filter plate to help seal the filter plate in the filter box and ensure that there is no molten aluminum on the side. Here we introduce the use of porous ceramic filter For Casting Product 1. Check and clean the debris on the surface of the filter box to keep the filter box clean and undamaged; 2. Gently put the filter plate into the filter box, and then press the sealing gasket on the filter plate to prevent the aluminum liquid from flowing or floating. 3. Preheat the filter box and filter plate uniformly to make it close to the temperature of the molten aluminum. The preheating temperature of the filter plate is not lower than 460℃. The expanded cotton cloth is automatically sealed by thermal expansion. The filter plate is not easy to float and is preheated to remove adsorbed water. Parts are more conducive to help open the opening of the initial filter, prevent thermal expansion and contraction, and bring some plugs to the filter plate. The preheating can be heated by electricity or gas, and the normal heating is 15-30 minutes; 4. Pay attention to the changes of the aluminum hydraulic head during casting, and maintain the normal required aluminum liquid flow. The normal initial pressure head is 100-150mm. When the molten aluminum starts to pass, The indenter will drop below 75-100mm, and then the indenter will slowly increase; 5. In the normal filtration process, avoid knocking and vibrating the filter plate. At the same time, the water tank should be filled with molten aluminum to avoid interference from molten aluminum. porous ceramic filter Tap Out Cone is used in the reverberatory furnace in aluminum melting It is a soft vacuum-formed ceramic fiber part It is used to cover & plug tap hole plugs used in furnaces for melting Aluminum, magnesium & zinc alloys AdTech tap-out cone is made of aluminum silicate fiber with vacuum filtering shape process rather than traditional handmade. Features: Good insulating properties Superior feeding efficiency High strength / weight ratio Good thermal shock resistance Low thermal conductivity Low thermal mass Non-wetting Low smoking Maintains strength throughout the application Textured exterior surface minimizes tearing during insertion Doesn't burn, smoke, or degrade Custom densities/hardness/sizes are available on request 6. After filtering is completed, please remove the filter plate and clean the filter box in time. porous ceramic filter Tap Out Cone In China, porous ceramic filter Refractory Tap Out Cone is called Refractory Cone, porous ceramic filter Tap Out Cone,Adtech Tap Out Cone. Adtech products have these characteristics:  
porous ceramic filter for casting product0adtech122022-06-30 23:29:52
porous ceramic filter For Casting products can effectively remove various impurities in molten aluminum. Sealing ceramic fiber gaskets are attached around the filter plate to help seal the filter plate in the filter box and ensure that there is no molten aluminum on the side. Here we introduce the use of porous ceramic filter For Casting Product 1. Check and clean the debris on the surface of the filter box to keep the filter box clean and undamaged; 2. Gently put the filter plate into the filter box, and then press the sealing gasket on the filter plate to prevent the aluminum liquid from flowing or floating. 3. Preheat the filter box and filter plate uniformly to make it close to the temperature of the molten aluminum. The preheating temperature of the filter plate is not lower than 460℃. The expanded cotton cloth is automatically sealed by thermal expansion. The filter plate is not easy to float and is preheated to remove adsorbed water. Parts are more conducive to help open the opening of the initial filter, prevent thermal expansion and contraction, and bring some plugs to the filter plate. The preheating can be heated by electricity or gas, and the normal heating is 15-30 minutes; 4. Pay attention to the changes of the aluminum hydraulic head during casting, and maintain the normal required aluminum liquid flow. The normal initial pressure head is 100-150mm. When the molten aluminum starts to pass, The indenter will drop below 75-100mm, and then the indenter will slowly increase; 5. In the normal filtration process, avoid knocking and vibrating the filter plate. At the same time, the water tank should be filled with molten aluminum to avoid interference from molten aluminum. 6. After filtering is completed, please remove the filter plate and clean the filter box in time. porous ceramic filter Tap Out Cone In China, porous ceramic filter Refractory Tap Out Cone is called Refractory Cone, porous ceramic filter Tap Out Cone,Adtech Tap Out Cone. Adtech products have these characteristics: porous ceramic filter Tap Out Cone is used in the reverberatory furnace in aluminum melting It is a soft vacuum-formed ceramic fiber part It is used to cover & plug tap hole plugs used in furnaces for melting Aluminum, magnesium & zinc alloys AdTech tap-out cone is made of aluminum silicate fiber with vacuum filtering shape process rather than traditional handmade. Features: Good insulating properties Superior feeding efficiency High strength / weight ratio Good thermal shock resistance Low thermal conductivity Low thermal mass Non-wetting Low smoking Maintains strength throughout the application Textured exterior surface minimizes tearing during insertion Doesn't burn, smoke, or degrade Custom densities/hardness/sizes are available on request  
Ceramic Foam Filters For Casting Is Just Developed12022-06-29 01:57:03
Ceramic Foam Filters General Description of Ceramic Foam Filters Ceramic foam filters for casting is just developed as a new type molten metal filters to decrease casting flaw in recent years, play a vital role in the metal casting and foundry industries, where they are used to filter out impurities in molten metal to improve the quality and performance of the end product. Even the slightest non-metal impurities in molten metal can have a devastating effect on the performance and strength of finished metal goods. This can result in end products failing to meet the necessary quality standards; Ceramic filters play an essential role in removing these impurities and ensuring high-quality casting. Application of Ceramic Foam Filters Decontaminated the molten metal liquid Simplified gating system Improve the metallurgical structure of the castings Reduce slag inclusions of the castings Increase the casting quality rate Reduce casting internal re-oxidation defects Reduce the surface defects after machining of the castings Advantage of Ceramic foam filter High strength without loose ceramic particles or powder Three dimensional connected mesh structure and high porosity Large surface area of slag collection, large inner surface area of filtering Excellent thermal shock resistance Various sizes, shapes and pore sizes are available Particles larger than the pore size are captured at the top of the ceramic foam filter Smaller particles are captured on the filter cake created by the larger particles Finer particles are captured within the pores in the filter 
purchasing ceramic foam filters to other casting aluminum02022-05-18 19:14:02
Aluminium 7075 Aluminium Cff(ceramic foam filter) removes the inclusions in the aluminum melt. It has a significant effect on the strength, fatigue strength, corrosion resistance and stress corrosion cracking performance of the aluminum melt. Aluminium Cff can effectively control the oxidized inclusions in the melt and improve the quality of cast rods and rolled plates. It has become a common goal pursued by the metallurgical, foundry, and material industries of all countries. At present, filtration and purification methods are widely used to remove inclusions in aluminum alloy melts. Aluminium Cff can be divided into two categories by size 1. The unevenly distributed large inclusions in the macrostructure make the alloy structure discontinuous, reduce the compactness of the casting, and become the source of corrosion and cracks, thereby greatly reducing the strength and plasticity of the alloy. 2. The fine and scattered inclusions cannot be completely removed after refining. They increase the viscosity of molten metal and reduce the feeding capacity of molten aluminum during solidification. The secondary oxidation inclusions are mainly formed during the casting process. During the casting process, molten aluminum contacts air, and oxygen reacts with aluminum to form oxide inclusions. During the smelting process, the aluminum alloy comes into contact with various components in the furnace gas to produce compounds such as AL2O3. Al2O3 in the aluminum melt will increase the hydrogen content in the aluminum melt. Therefore, the content of al2o3 in molten aluminum has a great influence on the formation of pores in aluminum castings. With the accumulation of this knowledge, the process engineers of the ceramic foam filter China factory can better improve and transform the product quality, and manufacture online degassing devices and CFF devices that meet customer needs. Therefore, Norwegian Aluminum Company is satisfied with the quality of the ceramic foam filters products of the Chinese factory, and recommends the method of purchasing ceramic foam filters to other casting aluminum companies in Europe [email protected] Aluminium 7075 Aluminium Cff effectively controls the oxidized inclusions in the melt and improves the quality of cast rods and rolled plates. It has become a common goal pursued by the metallurgical, foundry, and material industries of all countries. At present, filtration and purification methods are widely used to remove inclusions in aluminum alloy melts. 
ceramic foam filter foundry adopts the principle of adsorption to filter02022-03-01 21:38:20
Molten Aluminum Filter Aluminum Pakistan has excellent corrosion resistance and corrosion resistance, so it can effectively remove inclusions in molten aluminum, reduce residual gas, and provide laminar flow. It is suitable for improving the quality of aluminum alloy and other non-ferrous alloy castings. Enhance mechanical properties, improve metallographic structure, and transform turbulent flow into laminar flow.The molten aluminum filtered by the ceramic foam filter foundry is quite clean. Cleaner Aluminium can produce higher quality castings in aerospace, automotive, electronics and other industries, all of which help increase profits. Advantages of Molten Alumina ceramic foam  filter Aluminum Pakistan Factory1. The ceramic foam filter foundry adopts the principle of adsorption to filter, which can effectively remove the large impurities in the aluminum liquid and effectively adsorb the small impurities;2. There is no slag in the ceramic filter foundry, which effectively reduces the pollution of molten aluminum;3. The ceramic foam filters foundry has good thermal shock resistance and corrosion resistance to molten metal; The ceramic filter casting supplier AdTech ([email protected]) provides all standard sizes and various thickness products. We provide all porosities from PPI 10 to PPI 60 (PPI = number of holes per inch). The size of the filter can also be customized. The filtration purification method is a method of filtering impurities, gases and some harmful elements in the molten aluminum through a filter (body) in the process of casting salt or casting.The principle is adsorption filtration and mechanical filtration.The mechanical properties of aluminum alloy filter castings are greatly improved, and the strength, toughness and elongation can be improved.After the molten aluminum is filtered, the quality of ingots and castings is also greatly improved.There are many lead melt filter materials, such as glass cloth, refractory fiber mesh, magnesium fluoride, calcium fluoride and so on.For Asian OEM filter agent, please contact the Chinese manufacturer [email protected] Ceramic foam filters are basically divided into 6 pore sizes: 10PPI, 15PPI, 20PPI, 25PPI, 30PPI, and 40PPI. The larger the number, the smaller the aperture. But in actual practice, the four types of 10PPI, 20PPI, 30PP, and 40PPI can meet the needs of customers. Aperture selection1. The casting: 10~25ppi2. Semi-continuous casting: 30~60ppi3. High-quality aluminum or sheet: 50~60ppi4. Continuous casting and rolling: 50~60p Recently, Indian aluminum companies demanded that the Indian coal company immediately resume the supply of coal to the industry. The severe shortage of thermal coal has affected the normal operation of the company. The Aluminum Association of India (AAI) stated that the decision of state-owned coal companies to drastically cut the supply of coal in non-electric industries has caused aluminum companies’ captive power plants to face coal shortages. Market participants indicated that severe coal supply shortages may adversely affect Vedanta and Hindalco. Aluminum companies said that the only solution at present is for the Coal Company of India to increase coal supply, because it is difficult to solve this problem in a short time by relying on imports. It is understood that India’s coal supply often suffers from cyclical shortages. Affected by factors such as monsoons, the country’s coal production will decline in the third quarter of each year. However, this year’s shortage has exceeded expectations. According to data from Adtech China, currently, India’s electrolytic aluminum production capacity is about 4 million tons per year, accounting for 12% of overseas aluminum production capacity, and all rely on coal power. 

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