Boron extracting method

A boron ore and boron-rich technology, applied in chemical instruments and methods, borates, boron compounds, etc., can solve the problems of incomplete roasting of ore powder, slow filtration speed, high sodium roasting temperature, etc.

Active Publication Date: 2018-05-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flash roasting has high efficiency but the roasting of mineral powder is not complete, and at the same time requires high equipment; the temperature of sodium roasting is high, and it is molten during roasting. After cooling, the mineral powder needs to be b

Method used

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  • Boron extracting method

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Embodiment 1

[0069] A method for extracting boron from boron concentrate, said method comprising the steps of:

[0070] This embodiment uses boron concentrate containing B 2 o 3 9%, MgO 25%, SiO 2 20%, Fe 10%.

[0071] (1) Carry out ball milling with 100g of boron concentrate, the part of ball milling ore powder particle size≤75 μ m accounts for 51% of the total mass of all boron concentrate ore, and screen out the ore powder with particle size greater than 0.1mm;

[0072] (2) Adding soda lime that accounts for 5% of the mass fraction of the mineral powder in the mineral powder, after ball milling and mixing for 0.5h, the mineral powder is pressed into block;

[0073] (3) Putting the prepared sample into a roasting furnace and roasting in an air atmosphere, the roasting temperature is 650° C., and after roasting for 4 hours, boiled boron ore is obtained, and the reaction activity is 91%;

[0074] (4) Add water and 5% sodium carbonate and 0.5% activated carbon to the boiled boron ore,...

Embodiment 2

[0077] A method for extracting boron from boron concentrate, said method comprising the steps of:

[0078] This embodiment uses boron concentrate containing B 2 o 3 20%, MgO 37%, SiO 2 35%, Fe 18%.

[0079] (1) Carry out ball milling with 100g of boron concentrate, the part of the ball milled ore powder particle size≤75 μm accounts for 90% of the total mass of all boron concentrates, and screen out the ore powder with a particle size greater than 0.1mm;

[0080] (2) Add quicklime and 2% coke powder that account for 25% of the mass fraction of the mineral powder in the mineral powder, and after ball milling and mixing for 3 hours, the mineral powder is pressed into block;

[0081] (3) Putting the prepared sample into a roasting furnace and roasting under an oxygen atmosphere, the roasting temperature is 900°C, and after roasting for 0.5h, boron ore is obtained, and the reaction activity is 93%;

[0082](4) Add water and 35% sodium bicarbonate and 5% activated carbon to the...

Embodiment 3

[0085] A method for extracting boron from boron concentrate, said method comprising the steps of:

[0086] This embodiment uses boron concentrate containing B 2 o 3 13%, MgO 30%, SiO 2 25%, Fe 16%.

[0087] (1) Carry out ball milling with 100g of boron concentrate, the part of ball milled ore powder particle size≤75 μ m accounts for 86% of the total mass of all boron concentrate ore, and screen out the ore powder with particle size greater than 0.1mm;

[0088] (2) Add limestone that accounts for 15% of the mass fraction of ore powder and coke powder that accounts for 1% of the mass fraction of ore powder to the ore powder, and after ball milling and mixing for 1 hour, the ore powder is pressed into block;

[0089] (3) Putting the prepared sample into a roasting furnace and roasting in an air atmosphere, the roasting temperature is 700°C, after roasting for 1.5 hours, boron ore is obtained, and the reaction activity is 92%;

[0090] (4) Add water, sodium carbonate account...

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Abstract

The invention provides a boron extracting method, which comprises the following steps of (1) mixing a compound containing boron ore and calcium, roasting at 650 to 900 DEG C, and obtaining a roasted product; (2) after mixing the roasted product and activated carbon, carrying out carbonate decomposition and boron extraction to obtain a boron-rich liquid and a leaching residue. According to the boron extracting method, the energy consumption for a roasting pretreatment process is reduced, meanwhile, the reaction activity of a boron concentrate is improved, high leaching efficiency of the boron-containing component is ensured, a boron component in the boron concentrate can be high-efficiently extracted, the reaction activity of cooked boron ore after roasting achieves more than 90 percent, the leaching efficiency of carbonate decomposition and boron extraction is larger than 90 percent by weight, the content of B2O3 in boron mud is smaller than 2 percent by weight, and the boron-rich liquid is low in impurity content and can be further used for producing boron compounds such as borax and sodium metaborate.

Description

technical field [0001] The invention belongs to the technical field of element purification, and relates to a method for extracting boron, in particular to a method for extracting boron from boron concentrate. Background technique [0002] Borax is the basic raw material for producing boron-containing compounds. Almost all boron-containing compounds can be obtained through borax, and are widely used in glass manufacturing, mechanical processing, agricultural production and fine chemicals. Boron ore is the main raw material for the preparation of borax. my country's boron resources are very rich, and the proven reserves rank fifth in the world, among which the reserves in Liaoning account for 57.32% of the total boron reserves in the country. my country is rich in boron ore reserves, but the ore structure is complex, there are many paragenetic minerals, low grade, more lean ore, and less rich ore. The high-grade boron-magnesium ore has been exhausted after a long period of ...

Claims

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Application Information

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IPC IPC(8): C01B35/12
CPCC01B35/121C01B35/123C01P2006/80C22B3/02C22B3/04Y02P10/20
Inventor 庆朋辉丁信珍张红玲孙苒荻徐红彬衣守志张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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