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Method for effectively separating boron, magnesium and iron from paigeite based on chemical release reaction

A technology for chemical debonding and boronite, applied in chemical instruments and methods, magnetic separation, solid separation, etc., to achieve the effect of high resource grade and significant cost

Inactive Publication Date: 2013-10-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many units in China have carried out development and research on the comprehensive utilization of boron ore, and put forward some schemes. The representative ones are pyro-separation of boron ore, magnetic-gravity separation, magnetic-flotation separation, reduction roasting magnetic separation, The process of decomposing boronite with inorganic acid and hot ammonium sulfate solution has not been recognized and adopted by the chemical production department due to problems such as environmental protection, economic benefits, and process feasibility.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take group as B 2 o 3 8.7% MgO33.2% TFe18.2% ore powder 30g, add NH according to mass ratio 1:0.2~0.5 4 HSO 4 , 1: 0.05 ~ 0.2 add urea, 1: 0.05 ~ 0.1 add NaNO 3 , after simple mixing, roast at 200°C-500°C for 1-3 hours, and separate by wet magnetic separation to obtain 10.8g of iron concentrate with a TFe of 42.8%, filter the non-magnetic part to obtain a silicon-containing filter residue, and fractionally crystallize the filtrate to obtain boric acid 4.4 g, magnesium sulfate heptahydrate 53.83g.

Embodiment 2

[0015] Take group as B 2 o 3 6.0% MgO18.7% TFe35.86% boronite 100g, add NaHSO according to mass ratio 1:0.1~0.8 4 , 1: 0.05-0.2, add urea, after mixing by ball milling, roast at 200-500°C for 1-3 hours, and separate by wet magnetic separation to obtain 53.8g of iron concentrate with TFe of 51.9%, and filter the non-magnetic part to obtain silicon-containing filter residue , the filtrate was fractionally crystallized to obtain 9.0 g of boric acid and 107.0 g of magnesium sulfate heptahydrate.

Embodiment 3

[0017] Get the boronite 100g used in embodiment 2, add (NH 4 ) 2 SO 4 , 1:0.05~0.1 added (NH 4 ) 2 HPO 4 , 1:0.1~0.3, add NaCl, after mixing by ball milling, roast at 200~500°C for 1~3 hours, and separate by wet magnetic separation to obtain 52.1g of iron concentrate with TFe of 57.01%, and filter the non-magnetic part to obtain silicon-containing filter residue , the filtrate was fractionally crystallized to obtain 8.4 g of boric acid and 104.6 g of magnesium sulfate heptahydrate.

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PUM

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Abstract

The invention discloses a method for effectively separating boron, magnesium and iron from paigeite based on chemical release reaction and belongs to mineral processing technology and the field of integrated use of natural resources. The method is characterized by comprising the following steps of: crushing the paigeite to particles of which the particle size is less than 80 meshes; adding a release auxiliary agent into the particles and uniformly mixing the materials into bulk materials or pressing the materials into molded materials; calcining at the temperature of 700 DEG C; performing wet magnetic separation on the cured materials at one step to obtain iron ore concentrate; after wet magnetic separation, filtering the material slurry to obtain a mixed solution of silicon-containing filter residue, and boron and magnesium; and performing fractional crystallization on the mixed solution to obtain boric acid and a magnesium salt, wherein the filter residue is silicon-containing slag and is a good raw material for manufacturing building materials.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of mineral resources, and in particular relates to a method for realizing the separation of boron, magnesium and iron in boron-iron ore by combining loosening reaction and physical beneficiation. Background technique [0002] Boron ore is an important boron resource in my country. Due to its complex composition and multi-element symbiosis, it has not been effectively utilized so far. Since the boronite that can be used directly is almost exhausted, it has become an urgent task to realize the comprehensive utilization of boronite resources. Many units in China have carried out development and research on the comprehensive utilization of boron ore, and put forward some schemes. The representative ones are pyro-separation of boron ore, magnetic-gravity separation, magnetic-flotation separation, reduction roasting magnetic separation, The process of decomposing boronite with inorganic acid an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02B03C1/005C01F5/40C01B35/10
CPCY02P10/20
Inventor 宁桂玲张贵岐贡卫涛宋锵叶俊伟林源
Owner DALIAN UNIV OF TECH
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