Method for preparing metal magnesium and boron-enriched material from ascharite serving as raw material by vacuum thermal reduction method

A technology of magnesite and metal magnesium, which is applied in the field of low-silicon high-magnesium magnesia to produce metal magnesium and boron-rich materials by vacuum thermal reduction method, which can solve the problems of ecological environment damage, high cost and high price of alkali-free glass fiber, etc.

Inactive Publication Date: 2010-12-01
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Boronite is a mineral containing magnesium and boron whose main component is magnesium borate. At present, boronite is mainly used to produce borax through the carbon-soda method. This method has a low recovery rate of boron during the leaching process and can only The boron in boronite is utilized, and a large amount of magnesium enters the slag (that is, boron mud), and a large amount of boron mud is produced in the process of producing borax. At present, the boron mud has not been effectively used, and it can only be piled up to cause serious damage to the ecological environment.
[0003] In the al...

Method used

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  • Method for preparing metal magnesium and boron-enriched material from ascharite serving as raw material by vacuum thermal reduction method
  • Method for preparing metal magnesium and boron-enriched material from ascharite serving as raw material by vacuum thermal reduction method
  • Method for preparing metal magnesium and boron-enriched material from ascharite serving as raw material by vacuum thermal reduction method

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Effect test

Embodiment 1

[0032] Magnesium metal is produced by vacuum aluminothermic reduction using natural low-silicon boronite and limestone as raw materials and aluminum powder less than 0.2 mm in size as reducing agent.

[0033] Analyze the composition of boromagnesite, and according to the content of MgO, B in boromagnesite 2 o 3 , SiO 2 、Al 2 o 3 The chemical composition of CaO and CaO is mixed into limestone, so that the CaO added can meet the demand of CaO in chemical reaction equations (1), (2), and (3). That is to make enough CaO and B 2 o 3 3CaO·B 2 o 3 , and SiO 2 Formation of 2CaO·SiO 2 , and the reduction reaction with Al 2 o 3 Formation of 12CaO·7Al 2 o 3 Demand for CaO.

[0034] After the above two raw materials are prepared according to the above ratio, they are mixed and crushed and put into an abrasive device for grinding, or the above two raw materials can be crushed and ground separately and then mixed evenly. Then the finely ground raw materials are made into aggl...

Embodiment 2

[0041] Vacuum heat reduction is carried out by using boronite and limestone after flotation desiliconization as raw materials and aluminum powder with a particle size less than 0.2mm as reducing agent. There is a large amount of high-silicon and high-magnesium boronite in Liaoning, China. After the silicon content of this ore is reduced by flotation, metal magnesium can also be extracted directly through vacuum thermal reduction, and at the same time, boron-rich materials and aluminum hydroxide or alumina are by-products.

[0042] Analyze the composition of boromagnesite, and according to the content of MgO, B in boromagnesite 2 o 3 , SiO 2 、Al 2 o 3 The chemical composition of CaO and CaO is mixed into limestone, so that the CaO added can meet the demand of CaO in chemical reaction equations (1), (2), and (3). That is to make enough CaO and B 2 o 3 3CaO·B 2 o 3 , and SiO 2 Formation of 2CaO·SiO 2 , and the reduction reaction with Al 2 o 3 Formation of 12CaO·7Al 2...

Embodiment 3

[0050] Vacuum thermal reduction is carried out with low-silicon boronite and limestone as raw materials and aluminum-magnesium alloy powder with a particle size of less than 0.2 mm as reducing agent.

[0051] Analyze the composition of boromagnesite, and according to the content of MgO, B in boromagnesite 2 o 3 , SiO 2 、Al 2 o 3 The chemical composition of CaO and CaO is mixed into limestone, so that the CaO added can meet the demand of CaO in chemical reaction equations (1), (2), and (3). That is to make enough CaO and B 2 o 3 3CaO·B 2 o 3 , and SiO 2 Formation of 2CaO·SiO 2 , and the reduction reaction with Al 2 o 3 Formation of 12CaO·7Al 2 o 3 Demand for CaO.

[0052] After the above two raw materials are prepared according to the above ratio, they are mixed and crushed and put into an abrasive device for grinding, or the above two raw materials can be crushed and ground separately and then mixed evenly. Then the finely ground raw materials are made into aggl...

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Abstract

The invention discloses a method for preparing a metal magnesium and a boron-enriched material from ascharite serving as a raw material by a vacuum thermal reduction method, and belongs to the technical field of vacuum metal thermal reduction magnesium smelting. The method comprises the following steps of: (1) preparing materials; (2) grinding the materials; (3) calcining; (4) crushing the calcined blocks into the grain diameter of less than 0.2 mm, uniformly mixing the calcined blocks and aluminum powder with the grain diameter of less than 0.2 mm, and pressing into blocks; (5) performing vacuum reduction; (6) leaching slag; (7) filtering and separating; (8) drying; and (9) performing seed decomposition or carbon decomposition, and making the filtered solution of NaAl(OH)4 which contains a small amount of Na2CO3 and NaOH enter a seed decomposition or carbon decomposition container to ensure that the NaAl(OH)4 is decomposed into aluminum hydroxide (Al(OH)3). The method for extracting the metal magnesium and preparing a low-magnesium boron-enriched material from the ascharite can comprehensively utilize ascharite ore.

Description

technical field [0001] The invention belongs to the technical field of vacuum metal thermal reduction magnesium smelting, and in particular relates to a method for producing metal magnesium and boron-rich materials by using a vacuum thermal reduction method of low-silicon and high-magnesium boronite. technical background [0002] Boronite is a mineral containing magnesium and boron whose main component is magnesium borate. At present, boronite is mainly used to produce borax through the carbon-soda method. This method has a low recovery rate of boron during the leaching process and can only The boron in boronite is utilized, and a large amount of magnesium enters the slag (that is, boron mud), and a large amount of boron mud is produced in the process of producing borax. At present, the boron mud has not been effectively used, and it can only be piled up to cause serious damage to the ecological environment. . [0003] In the alkali-free glass fiber industry, alkali-free gl...

Claims

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Application Information

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IPC IPC(8): C22B26/22C01F7/02C03B37/00
CPCY02P10/20
Inventor 冯乃祥武小雷彭建平王耀武
Owner NORTHEASTERN UNIV
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