What chemical raw materials are needed for aluminum smelting, and what is the chemical equation for

If you're talking about textbook knowledge.

Alumina and cryolite (NA3F6) and graphite rods are needed for alumina smelting, and cryolite can reduce the melting point of alumina by electrolytic melting of alumina (I don't know how to reduce it, because the textbook doesn't talk about it, the teacher doesn't teach, and the college entrance examination doesn't take the exam).

If the landlord said that it was the actual aluminum treatment of the very esoteric industry, the pound called the small stone was copied in great detail from the encyclopedia.

If you don't understand, please ask, ask, dear

Introduction to aluminium ore and the basic process of aluminum.

is 2al2o3=4al+3o2. Industrial smelting of aluminum is to use an inert electrode to melt alumina to obtain a cavity, and the anode is chloride ion electron loss to produce chlorine gas.

The cathode is an aluminium ion that gives electrons to form aluminum.

The English name for aluminum comes from alum.

That is, sulfate complex salt kal(SO4)2·12H2O. Aluminum ions are chemical reactions in which aluminum atoms lose electrons, thus causing the aluminum atoms participating in the reaction to have 3 positive charges on them.

Summary. First of all, the scrap aluminum is classified and stacked in grading, such as pure aluminum, deformed aluminum alloy, cast aluminum alloy and mixed materials. For scrap aluminum products, the scrap aluminum products should be disassembled, the steel and other non-ferrous metal parts connected to the aluminum materials should be removed, and then processed into scrap aluminum products through cleaning, crushing, magnetic separation, drying and other processes.

How is aluminum scrap processed into ingots? What ingredients are added in between?

First of all, the scrap aluminum is classified and stacked in grading, such as pure aluminum, deformed aluminum occlusion touching gold, cast aluminum alloy and mixed materials. For scrap aluminum products, the scrap aluminum products should be disassembled, the steel and other non-ferrous metal parts connected to the aluminum materials should be removed, and then processed into scrap aluminum products through cleaning, crushing, magnetic separation, drying and other processes. Xiang's.

The liquefaction and separation of scrap aluminum is the most difficult development direction of aluminum metal in the future. Scrap aluminum is more miscellaneous, and it is easiest to make non-standard ingot mold trillion potatoes. If it can be classified, it can be processed by grade series. Aluminum is alloy, not pure aluminum ingots.

The pure aluminum separated from the scrap aluminum, heated to 800, and then the slag was removed and poured into the mold to form an aluminum ingot.

(1) Preparation of scrap aluminum First of all, the scrap aluminum is classified and stacked in stages, such as pure aluminum, deformed aluminum alloy, cast aluminum alloy, mixture, etc. For scrap aluminum products, they should be dismantled, the steel and other non-ferrous metal parts connected to the aluminum should be removed, and then scrap aluminum should be made into scrap aluminum through cleaning, crushing, magnetic separation, drying and other processes. For light and loose sheet waste aluminum parts, such as locking arms, speed gear bushings and aluminum chips on automobiles, they should be pressed into bales with hydraulic metal balers.

For steel core aluminum stranded wire, the steel core should be separated first, and then the aluminum wire should be wound into a coil.

The liquefaction and separation of scrap aluminum is the development direction of aluminum metal in the future, which combines the pretreatment of aluminum scrap miscellaneous materials with re-casting, which not only shortens the process flow, but also avoids air pollution to the greatest extent, and greatly improves the rate of net metal.

There is a filter in the device that allows gas particles to pass through, in the liquefaction layer, the aluminum precipitates at the bottom, and the organic matter such as paint attached to the scrap aluminum decomposes into gas, tar and solid charcoal above 450, and then completely burns through the oxidation device inside the separator. The waste is stirred by the rotating drum and mixed with the dissolved liquid in the silo, and the impurities such as sand and gravel are separated into the sand and gravel separation area, and the dissolving ferry brought out by the waste is returned to the liquefaction bin through the ** propeller.

(2) Ingredients According to the preparation and quality status of scrap aluminum materials, according to the technical requirements of recycled products, select and calculate the amount of various materials. The oxidative burn loss of silicon and magnesium is greater than that of other alloying elements, and the burn loss of various alloying elements should be determined by experiments in advance. The physical specifications and surface cleanliness of the scrap aluminum will directly affect the quality of the recycled finished product and the actual yield of the metal, and up to 20% of the active ingredients of the scrap aluminum will enter the slag after the oil removal is not clean.

3) Regenerated deformed aluminum alloy The deformed aluminum alloy that can be produced with scrap aluminum alloy is the main one, of which the main one is the production of 3105 alloy. In order to ensure that the chemical composition of the alloy material meets the technical requirements and the technological needs of pressure processing, a part of primary aluminum ingots should be added if necessary.

4) Only a small part of the recycled casting aluminum alloy scrap aluminum material is recycled into deformed aluminum alloy, and about 1 4 is regenerated into a deoxidizer for steelmaking, and most of it is used for recycled casting aluminum alloy.

4) Recycled casting aluminum alloy The process flow is shown in Figure 1-19. Only a small part of the aluminum scrap is recycled into deformed aluminum alloys, and about 1 4 is regenerated into deoxidizers for steelmaking, and most of them are used to recycle aluminum alloys for casting. The die-casting aluminum alloys A380 and ADCL0 widely used in the United States, Japan and other countries are basically recycled from scrap aluminum.

The main equipment for recycled aluminum is a smelting furnace and a refining purification furnace, which generally uses a special static furnace for oil or gas.

The raw materials used in the smelting of aluminum ingots in China's recycled aluminum plants are mainly in two aspects: one is the scrap miscellaneous aluminum imported from abroad, and the other is the scrap miscellaneous aluminum produced in China. At the beginning of the development of the recycled aluminum industry, due to the fact that a large number of domestic aluminum products and aluminum products have not yet entered the scrapping period, in addition, the concept of domestic recycling is relatively weak, and imported scrap aluminum once became the main source of recycled aluminum ingot smelting in China.

In China's first scrap aluminum, about 1 5 from the packaging industry, 2 5 from the transportation industry, 1 3 from the construction industry, scrap aluminum produced in scrap cars and scrap aluminum cans are two important areas. China is the world's largest producer and consumer of aluminum, with a large number of aluminum products into the scrap period, the future of domestic aluminum scrap will continue to grow, and China's dependence on imported aluminum scrap will continue to decrease.