High value-added greening comprehensive utilization method of boron concentrate, boron-containing iron concentrate and ludwigite

A technology of ferroboron concentrate and maficite ore, which is applied in the field of high value-added green comprehensive utilization of boron concentrate, can solve problems such as difficult separation, many paragenetic minerals, and complex structure of maficite ore, and achieve simple process flow , simple equipment, low cost effect

Inactive Publication Date: 2010-04-14
NORTHEASTERN UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Due to the complex structure of maficite and many paragenetic minerals, it is difficult to separate it by conventional methods
Therefore, there is no mature process that can comprehensively extract the valuable components iron, boron, silicon, magnesium, etc. in boron mafic ore.

Method used

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  • High value-added greening comprehensive utilization method of boron concentrate, boron-containing iron concentrate and ludwigite
  • High value-added greening comprehensive utilization method of boron concentrate, boron-containing iron concentrate and ludwigite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The composition of the boron concentrate used is: TFe 18.86%, SiO 2 18.04%, MgO 32.5%, B 2 o 3 10.70%, CaO2 o 3 <1%.

[0043] Crush the boron concentrate, grind it to less than 80 μm, and mix it with ammonium sulfate solution evenly. Wherein, the molar ratio of magnesium oxide and ammonium sulfate in the ore is 1:3, and the mass fraction concentration of ammonium sulfate is 40%. Then dehydrate at below 200°C for 2 hours, raise the temperature to 500°C, carry out roasting reaction, keep the temperature for 2 hours, and absorb the gas released during the reaction with water. The roasted product is cooled, dissolved in water, and then separated into solid and liquid. The filtrate is magnesium sulfate solution; the filter residue is silicon dioxide and iron oxides.

[0044] After the magnesium sulfate solution is evaporated and cooled, boric acid crystals are precipitated. The filtrate after filtration is kept at 50°C, and air is passed through it. At the same time,...

Embodiment 2

[0050] The composition of the boron-containing iron concentrate used is: TFe 50.0%, SiO 2 5.4%, MgO 12.3%, B 2 o 3 6.6%, FeO 7.4%, S 0.05%, CaO 2.4%, burning loss 1.36%.

[0051] Crush the boron concentrate, grind it to less than 80 μm, and mix it with ammonium sulfate solution evenly. Wherein, the molar ratio of magnesium oxide and ammonium sulfate in the ore is 1:4, and the mass percent concentration of ammonium sulfate is 38%. Dehydrate at below 200°C for 2 hours, then heat up to 400°C for calcination, keep the temperature for 3 hours, and carry out the calcination reaction. The gas released during the reaction process is absorbed by water. The roasted product is cooled, dissolved in water, and then separated into solid and liquid. The filtrate is magnesium sulfate solution, and the filter residue is magnesium extraction residue, which is mainly iron oxide and contains a small amount of silicon dioxide, which can be directly used as raw material for ironmaking.

[00...

Embodiment 3

[0055] The composition of maficite used is: TFe 28.08%, SiO 2 15.50%, MgO 22.66%, B 2 o 3 9.34%, CaO1.06%, S0.74%, Al 2 o 3 1.25%.

[0056] Crush the boron maficite, grind it to a fineness below 80 μm, and mix it with the concentrated ammonium sulfate solution evenly. Wherein, the molar ratio of magnesium oxide and ammonium sulfate in the ore is 1:6, and the mass fraction concentration of concentrated ammonium sulfate is 40%. Then dry and dehydrate at below 150°C for 3 hours, then heat up to 450°C for roasting reaction, keep it warm for 2 hours, and absorb the gas released during the reaction with water. After the roasted product is cooled, add water to dissolve it, and then carry out solid-liquid separation. The filtrate is magnesium sulfate solution, and the filter residue is magnesium extraction residue, mainly silicon dioxide and iron oxide.

[0057] After the magnesium sulfate solution is concentrated and cooled, boric acid crystals are precipitated, and the fil...

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Abstract

A high value-added greening comprehensive utilization method of boron concentrate, boron-containing iron concentrate and ludwigite comprises the following steps: (1) crushing and grinding the boron concentrate, the boron-containing iron concentrate and the ludwigite and then mixing with ammonium sulfate for roasting; (2) dissolving a roasted product with water to obtain magnesium sulfate solution (wherein also containing a small amount of ferric sulfate, ferrous sulfate and boric acid) and extracting magnesium slag (mainly containing silica and iron oxide); (3) reducing the temperature of the magnesium sulfate solution to precipitate boric acid crystal, then removing iron to obtain magnesium sulfate refined liquid, and then using ammonia water or ammonia gas for adjusting pH value to produce magnesium hydroxide precipitate or adding ammonium bicarbonate to produce basic magnesium carbonate precipitate; and (4) extracting the magnesium slag which can be directly used as ironmaking material according to the iron content, or treating with alkali to extract the silica which is used as the ironmaking material. The high value-added greening comprehensive utilization method is suitable for treating the boron concentrate, the boron-containing iron concentrate and the ludwigite, has simple process, and simple and convenient equipment, and realizes the high value-added greening comprehensive utilization of the boron concentrate, the boron-containing iron concentrate and the ludwigite with lower cost.

Description

technical field [0001] The invention relates to a method for high value-added green comprehensive utilization of boron concentrate, boron-containing iron concentrate, and boron mafic ore, in particular to a method for preparing oxidized boron concentrate, boron-containing iron concentrate, and boron mafic ore. Magnesium, silica and boric acid methods. Background technique [0002] Boron is an important chemical raw material and plays an important role in the high-tech field. my country's total boron reserves rank fifth in the world. But the distribution is sparse, and what can be developed and utilized is mainly "white boron ore", which only accounts for 8.98% of the country's total reserves. Based on the current production, it is expected that all of them will be harvested in the near future. With the development of the national economy, the demand for boron is increasing rapidly, and the available boron resources cannot fully meet the needs of the chemical industry. Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/02C01C1/24C01B35/10C01F5/02C01G49/02C01B33/12C01F11/02C01B31/20C01D7/00C01D1/04C01B32/50
Inventor 翟玉春吴艳顾惠敏王伟宁志强
Owner NORTHEASTERN UNIV
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