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Method for synchronously extracting boron and iron in paigeite

A simultaneous extraction and boronite technology, applied in the direction of borate, boron oxide compound, process efficiency improvement, etc., can solve the problems of low boron comprehensive recovery rate, low product added value, large material handling capacity, etc., to achieve The effect of strong adaptability of raw materials, low cost and low impurity content

Active Publication Date: 2013-01-30
CENT SOUTH UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical route of "iron first and boron" in the blast furnace method must be treated by the two-step method of blast furnace reduction and boron-rich slag activation. The process is long and costly, and the comprehensive recovery rate of boron is low (<85%)
The sodium roasting process can activate boron and increase the magnetism of the filter residue during the roasting process. However, after the roasting, the sample is subjected to pressurized hydrothermal leaching, which has a large amount of material handling and low efficiency, and the filter residue obtained after magnetic separation is only As a raw material for ironmaking, magnetite concentrate has low added value

Method used

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  • Method for synchronously extracting boron and iron in paigeite
  • Method for synchronously extracting boron and iron in paigeite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: 85% sodium carbonate, 5% sodium sulfate, 1% sodium fulvic acid, 4% sodium humate, and 5% sodium oxalate are mixed and formulated as an additive, and boronite powder and its mass fraction are 15% After the above additives are fully mixed, agglomerated, and dried, lignite is used as the reducing agent, and the reduction roasting is carried out at 1000°C for 60 minutes. The mass ratio of the materials was 10:1 for grinding-water leaching for 30 minutes. After the slurry was filtered, the boron leaching rate was 85.54%. The filter residue was sorted by wet weak magnetic separation. The iron grade in the obtained iron concentrate was 86.57%. The rate is 90.81%.

Embodiment 2

[0042] Embodiment 2: 70% sodium carbonate, 20% sodium sulfate, 2% sodium fulvic acid, 4% sodium humate, and 4% sodium oxalate are mixed and formulated as additives, and boronite powder and its mass fraction are 20% After the above additives are mixed, agglomerated, and dried, anthracite is used as a reducing agent, and the reduction roasting is carried out at a temperature of 1100°C for 60 minutes. The mass ratio was 10:1 for grinding-water leaching for 30 minutes. After the slurry was filtered, the boron leaching rate was 87.80%. The filter residue was sorted by wet weak magnetic separation method. 93.67%.

Embodiment 3

[0043] Embodiment 3: 50% sodium carbonate, 25% sodium sulfate, 3% sodium fulvic acid, 10% sodium humate, and 12% sodium oxalate are mixed and formulated as an additive, and boronite powder and its mass fraction are 30% After the above-mentioned additives are mixed, agglomerated and dried, lignite is used as reducing agent, reduced and roasted at 1100°C for 60 minutes, and the reduced product is placed in a ball mill with 60% pulp concentration, balls and ball milled materials The mass ratio is 8:1 for immersion in water for 20 minutes. After the slurry is filtered, the boron leaching rate is 89.21%. The filter residue is sorted by wet weak magnetic separation method. The iron grade in the obtained iron concentrate is 92.46%, and the recovery rate of ferromagnetic separation is 93.85%. .

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Abstract

The invention provides a method for synchronously extracting boron and iron in paigeite. The method comprises the following steps: fully mixing a paigeite powder and an additive composed of sodium carbonate, sodium sulfate, natrium humate, sodium fulvate and sodium oxalate by mixing, agglomerating, performing reduction roasting on dried paigeite agglomerates which take coal as a reducing agent, cooling the roasting agglomerates and placing in a bowl mill, synchronously grinding ore and leaching by water, performing solid-liquid separation on a pulp to obtain a filtrate containing sodium metaborate and filter residues containing metallic iron powder, evaporating and crystallizing a filtrate to obtain the sodium metaborate crystals; employ a wet type weak magnetic separation on the filter residue to obtain the directly reduced metallic iron powder with iron grade greater than 90%, wherein the metallic iron powder is a high-quality furnace material used for making steel of an electric furnace; and treating the magnetic separation nonmagnetic products to recover the valuable components such as magnesium and silicon. The method has the advantages of strong raw material adaptability, simple process flow, high production efficiency, less energy consumption, low cost, good comprehensive recovery effect of ferroboron and high product added value. The method provided by the invention can provide technical support for efficiently using the paigeite with abundant reserve volume for our country, and has wide popularization and application prospects.

Description

technical field [0001] The invention relates to a method for synchronously extracting boron and iron from boron ore, belonging to the fields of chemical engineering and iron and steel metallurgy. Background technique [0002] Boron and boron compounds have light weight, flame retardancy, heat resistance, high hardness, high strength, wear resistance and catalytic performance, and are widely used in various sectors of the national economy. Boron ore accounts for 57.88% of my country's boron resources, and the reserves of boron iron ore in Liaodong alone reach 280 million tons, of which B 2 o 3 The reserve is 21.84 million tons, which belongs to the large boron deposit. Although boron-iron ore is convenient to mine, it is difficult to process and treat due to the large amount of para-existing minerals and complex structure, and it has not yet been developed and utilized on an industrial scale. Therefore, accelerating the development and utilization of boron-iron ore resourc...

Claims

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Application Information

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IPC IPC(8): C21B13/00B22F9/20C01B35/12
CPCY02P10/20Y02P20/10
Inventor 李光辉饶明军姜涛梁斌珺张元波范晓慧罗骏杨永斌郭宇峰李骞陈许玲朱忠平黄柱成游志雄曾精华刘明霞张树辉
Owner CENT SOUTH UNIV
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