Sintering machine uses magnesium ore to extract magnesium

1. First, aluminum powder, magnesite and dolomite are weighed in the proportion of 1-2:2-4:6-15 by weight, then magnesite and dolomite are calcined in rotary kiln. After grinding, they are mixed with 80-100 mesh aluminum powder. They are pressed to form a pellet under the pressure of 15-35 MPa, put into metal material tank, and put into rection tank. Under the condition of 1100-1170 ℃ and vacuum for 6-8 hours, Magnesium is proced by chemical reaction with aluminum powder as recing agent.

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3. MgO in sinter can improve the smelting technical index, expand the range of stable slag and improve the desulfurization capacity of slag, so as to ensure the stable operation of blast furnace, and finally make the solid fuel consumption of blast furnace lowest and the iron quality higher.

4. It's magnesium carbonate. It's valuable for refining, but it's not big. Magnesium compounds such as magnesium carbonate and magnesium chloride are abundant and cheap. The price of magnesium is expensive because of the high energy consumption of electrolysis and other methods.

5. Investment in magnesium mine is very profitable! However, it depends on whether your ore grade meets the instrial mining standard, whether the reserves have mining value, whether the proceres are complete, and whether your contacts are enough. If the above conditions are all right, then you will have no problem investing again! It is suggested to hire geological experts with relevant experience or professionals engaged in magnesium mining as consultants. The mining investment profit is great, but the risk is proportional to the profit! Magnesite is the main raw material for extracting magnesium. China has the largest reserves. Two thirds of the world's Magnesite reserves are concentrated in China, and one half of the output is provided by China. As of 1996, 27 magnesite mining areas have been proved in China, with 3.001 billion tons of magnesite reserves, distributed in 9 provinces (regions). Liaoning has the richest magnesite reserves, accounting for 85.6% of the country; Shandong, Tibet, Xinjiang and Gansu took the second place. Yingkou and Haicheng in Liaoning Province are known as China's magnesium capital, while the reserves in Inner Mongolia are very general, so investment should be cautious!!!

6. Please refer to: http://ke..com/view/7181793.htm
when the magnesite is calcined at 1800 ℃, the carbon dioxide completely escapes, and the magnesia forms a compact block of periclase, which is also called sintered magnesia. It is mainly composed of magnesia. It is made of natural super grade magnesite ore by flotation purification, light burning, fine grinding, high pressure ball pressing and ultra-high temperature oil shaft kiln calcination.

7. A:
magnesia powder is divided into three categories: sintered magnesia, light burned magnesia and fused magnesia. Magnesia is one of the most important raw materials for refractories. It is used to make all kinds of magnesia bricks, magnesia alumina bricks, ramming materials, furnace repair materials, etc. Those with more impurities are used to lay steel-making furnace bottom
the main component of magnesia is magnesium oxide, and the impurities are Cao, SiO2, Fe2O3, etc. magnesium oxide is an alkaline oxide with a melting point of 2800 ℃. After heating at high temperature, it turns into a stable cubic crystal, commonly known as periclase
calcination or electrofusion of natural magnesite, extraction from seawater and salt lake brine, extraction from dolomite, serpentine and brucite. At present, magnesite is mainly obtained from calcination or electrofusion of magnesite in China, while it is mainly extracted from seawater in Japan and Western European countries
sintered magnesia is mainly made of magnesite, brucite or magnesium hydroxide extracted from seawater by high temperature calcination. Strong hydration resistance. When magnesite is calcined at 700-950 ℃, CO2 is released. The magnesite obtained is soft, porous and loose material, which can not be used as refractory; Magnesite calcined at 1550-1600 ℃ is called sintered magnesite. Sintered magnesia is made from natural magnesite by one-step calcination or two-step calcination process with high-temperature equipment such as shaft kiln and rotary kiln; Sintered magnesia can be divided into 18 grades according to its physical and chemical indexes. See GB / T 2273-1998 for details. Magnesite and other raw materials are melted in electric arc furnace and cooled to form fused magnesite; Magnesium oxide extracted from seawater is called seawater magnesia. High purity magnesia is made from natural super grade magnesite ore by flotation purification, light burning, fine grinding, ball pressing and calcination in ultra-high temperature oil shaft kiln. It is a high quality raw material for brick making and indefinite refractory. The medium grade magnesia is proced from light burned magnesia with 97% MgO content by pressing ball and calcining in high temperature shaft kiln. The proct has good sintering degree and dense crystal. It is a high-quality raw material for the proction of medium grade magnesia refractory procts. It can also be used to manufacture various magnesia bricks, magnesia alumina bricks, ramming materials, furnace repair materials, etc. Those with more impurities are used to lay steel-making furnace bottom
light burned magnesium powder is a kind of bending resistant, pressure resistant, high strength, gas hard, cementitious material, which is widely used in national defense, medicine, chemical instry, papermaking, shipbuilding and other instries. In the building materials instry, it can be used to make fenders, particleboards, insulation columns, railings, artificial marble, asbestos tiles, ordinary tiles, wallboards and paving floors. With the development of science and technology, light burned magnesia powder is used more widely. It can be used as civil engineering procts, light and heavy machinery packaging boxes, packaging bottom beams, high-temperature refractories, and can also be used to make beautiful and glossy furniture. It can also be used as casting model in machinery instry.

8.

Na: electrolytic molten NaCl: 2nacl = 2Na + Cl & 8322; In this paper, we present a new method for the determination of MgCl by electrochemical melting MgCl₂= Mg+Cl₂ In addition, al: electrolytic Al & # 8322; O₃： 2Al₂ O₃= 4Al+3O₂ The electrolytic aluminum is the aluminum obtained by electrolysis. Cryolite alumina molten salt electrolysis is used in modern electrolytic aluminum instry. Molten cryolite is the solvent, alumina as the solute, carbonaceous body as the anode, liquid aluminum as the cathode, after a strong direct current, at high temperature, electrochemical reaction is carried out at the two poles of the electrolytic cell, namely electrolysis

extended data:

chemical properties of magnesium:

has relatively strong recibility, can react with boiling water to release hydrogen, and can proce dazzling white light ring combustion. Magnesium does not react with fluoride, hydrofluoric acid and chromic acid, and is not eroded by caustic alkali, but it is very easy to dissolve in organic and inorganic acids. Magnesium can directly react with nitrogen and chromium Organic chemicals such as sulfur and halogen, including hydrocarbons, aldehydes, amines, lipids, and most oils, have little or no effect on magnesium

However, the reaction between magnesium and halogenated hydrocarbon is more violent in anhydrous condition, and magnesium can have combustion reaction with carbon dioxide, so the combustion of magnesium can not be extinguished by carbon dioxide fire extinguisher. Because of the interaction between magnesium and N - 8322; And O & 8322; So when magnesium burns in the air, it burns violently and gives off dazzling white light, releases heat and generates white solid

The change of

in vinegar was that bubbles came out quickly, floated on the surface of vinegar and disappeared graally. Some fireworks and flares contain magnesium powder, which can emit dazzling white light when burning in the air. The valence of magnesium in chemical reaction is usually + 2

principle of electrolysis:

the ions in the electrolyte are often in disorderly motion, and after DC, the ions make directional motion. The cation moves to the cathode, gets electrons at the cathode and is reced; The anion moves to the anode, loses electrons at the anode and is oxidized. In the process of water electrolysis, oh loses electrons at the anode and is oxidized to oxygen

H gets electrons at the cathode and is reced to hydrogen. The obtained oxygen and hydrogen are the procts of water electrolysis process. During electrolysis, a battery is formed between the proct precipitated on the electrode and the electrolyte solution, and its electromotive force is numerically equal to the theoretical electrolytic voltage of the electrolyte

9. Alkaline refractories with more than 90% magnesia content and periclase as the main crystalline phase of magnesite brick can be generally divided into two categories: fired magnesia brick (also known as fired magnesia brick) and chemically bonded magnesia brick (also known as unburned magnesia brick). Magnesia brick with high purity and high firing temperature is called direct bonded magnesia brick because of the direct contact of periclase grains; The brick made of fused magnesia is called fused magnesia brick
magnesia brick has high fire resistance, good alkali resistance, high softening temperature under load, but poor thermal shock resistance. Sintered magnesia brick is made from magnesia brick. After crushing, proportioning, mixing and shaping, it is fired at 1550 ~ 1600 ℃ and the firing temperature of high-purity procts is above 1750 ℃. Unfilled magnesia brick is made by mixing, molding and drying magnesia with proper chemical binder
high quality sintered magnesia is used as the main raw material for fired magnesia brick, and pulp is used as the binder. After mixing and high pressure forming, it is fired in a high temperature tunnel kiln above 1550 ℃. It has good thermal stability, corrosion resistance and spalling resistance. It is widely used as lining refractory for converter, electric arc furnace and other instrial furnaces
fused magnesia brick has the advantages of compact structure, high mechanical strength and low impurity content. It is mainly used in the high temperature area of the heat storage

chamber of large glass furnace. Fused magnesite is made from high-quality magnesite by melting. It is made of magnesite, brucite or magnesium hydroxide extracted from sea water by high temperature calcination. Strong hydration resistance.

10. Sister, why do you ask this question? Why does this idea come out? I can only search the explanation of light burned magnesia: light burned magnesia
calcine magnesite, brucite and magnesium hydroxide extracted from seawater or brine at about 800 ~ 1000 ℃ to decompose and discharge CO2 or H2O to obtain light burned magnesia, also known as light burned magnesia, caustic magnesia or light burned magnesia, commonly known as bitter earth powder. The light burned magnesia powder has loose texture and high chemical activity. It can be used for manufacturing magnesium cement, magnesite building materials, thermal insulation materials, etc. it is also the intermediate proct of two-step calcination method to proce high-quality magnesia
when magnesite is heated, equiaxed periclase occurs at about 600 ℃; At 650 ℃, equiaxed periclase disappears and non equiaxed periclase occurs; The equiaxed periclase disappears completely at 850 ℃. These periclase lattices have high surface energy e to the appearance of point defects and dislocations. The lattice of MgO is not much water than that of MgCO3, so the pores between the lattices increase, the porosity is high, the specific surface area is large and the activity is high
the light burned magnesia powder is light yellow and light brown, the particle size is mostly below - 100 mesh, and the periclase crystal is very small (< 3 μ m) Its true specific gravity is 3.07 ~ 3.22, bulk density is 0.8 ~ 1.2g/cm3, refractive index is 1.68 ~ 1.70, and lattice constant is large α= 4212) with many lattice defects, brittle texture, pore structure and high reactivity, it is easy to carry out solid-state reaction or sintering, react with water to proce Mg (HO) 2 and harden, and has bonding ability. The volume shrinkage of light burned magnesia powder calcined from magnesite is about 5%; Generally, 3% ~ 5% of CO2 remains e to incomplete decomposition
the light burning temperature and time of magnesite have a certain influence on the activity of light burned magnesite powder. Magnesite was calcined at 600, 650, 700, 750, 800, 850 and 900 ℃ respectively. The calcination temperature of 700, 750 and 800 ℃ had no obvious effect on the activity of light burned magnesite powder in 15 ~ 90 minutes; The effect of 600, 650, 850 and 900 ℃ on the activity is particularly significant. When calcined at 600 and 650 ℃, the activity increases with time; When calcined at 850 ℃ and 900 ℃, the activity decreases obviously with the prolongation of hydrocarbon calcination time

in addition, the light burned magnesium is made of magnesite calcined in light burned reverberatory kiln, rotary kiln or fluidized bed furnace. The proct is calcined evenly, with stable quality, high purity and good activity. It can be widely used in papermaking, chemical instry, rubber, medicine, animal husbandry and refractory