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Arsenic removing method of iron ore

An iron ore and arsenic removal technology, which is applied in the field of ore processing, can solve the problems of affecting the welding performance of steel, low arsenic removal rate, environmental pollution, etc., achieve a significant effect of arsenic removal, improve the efficiency of arsenic removal, and reduce environmental pollution.

Inactive Publication Date: 2018-11-30
ZAOZHUANG SNKSAN INTELLIGENT MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, arsenic, as a harmful element in iron ore, will mostly enter pig iron during smelting, which will have a series of adverse effects on steel properties, such as causing cracks on the hot-worked surface of steel, reducing the impact toughness of steel, and increasing the brittleness of steel , thereby reducing the quality of the steel and affecting the welding performance of the steel
[0003] At present, most of the existing arsenic removal methods are gasification arsenic removal process. Although the arsenic in iron ore can be removed to a certain extent, the arsenic removal rate is low, and most of the gasification arsenic removal products produced are highly toxic substances. It is easy to cause environmental pollution and bring serious environmental problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for removing arsenic from iron ore, which comprises the following steps:

[0024] 1) Put the arsenic-containing iron ore into a ball mill for grinding until the obtained ore material has a particle size of 30 mesh and accounts for 93% of the total material weight, then add an appropriate amount of deionized water and stir at 700r / min The speed is mechanically stirred and mixed evenly, and then the ultrasonic dispersion treatment is carried out at an ultrasonic frequency of 30kHz for 20 minutes to obtain a pulp A with a concentration of 12%. The dispersion effect of the material is effectively improved through the ultrasonic dispersion treatment;

[0025] 2) Add 0.15 times the weight of the strain mixture to the pulp A obtained in step 1), then adjust the pH value to 3 with 98% sulfuric acid, let it stand at 27°C for 12 days, filter to remove the liquid, and dry , get mixture B;

[0026] Wherein, the mixed solution of the strains is cultivated in domestic sewag...

Embodiment 2

[0032] A method for removing arsenic from iron ore, which comprises the following steps:

[0033] 1) Put the arsenic-containing iron ore into a ball mill for grinding until the obtained ore material has a particle size of 30 mesh and accounts for 93% of the total material weight, then add an appropriate amount of deionized water and stir at 700r / min The speed is mechanically stirred and mixed evenly, and then the ultrasonic dispersion treatment is carried out at an ultrasonic frequency of 30kHz for 40 minutes to obtain a pulp A with a concentration of 12%. The dispersion effect of the material is effectively improved through the ultrasonic dispersion treatment;

[0034] 2) Add 0.15 times the weight of the strain mixture to the pulp A obtained in step 1), then adjust the pH value to 3 with 98% sulfuric acid, let it stand at 27°C for 12 days, filter to remove the liquid, and dry , get mixture B;

[0035] Wherein, the mixed solution of the strains is cultivated in domestic sewag...

Embodiment 3

[0041] A method for removing arsenic from iron ore, which comprises the following steps:

[0042] 1) Put the arsenic-containing iron ore into a ball mill for grinding until the obtained ore material has a particle size of 30 mesh and accounts for 93% of the total material weight, then add an appropriate amount of deionized water and stir at 700r / min The speed is mechanically stirred and mixed evenly, and then the ultrasonic dispersion treatment is carried out at an ultrasonic frequency of 30kHz for 30 minutes to obtain a pulp A with a concentration of 12%. The dispersion effect of the material is effectively improved through the ultrasonic dispersion treatment;

[0043] 2) Add 0.15 times the weight of the strain mixture to the slurry A obtained in step 1), adjust the pH value to 3 with 98% sulfuric acid, let it stand at 27°C for 12 days, filter to remove the liquid, and dry , get mixture B;

[0044] Wherein, the mixed solution of the strains is cultivated in domestic sewage t...

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PUM

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Abstract

The invention discloses an arsenic removing method of iron ore. The method comprises the following steps that 1) ore pulp is prepared; 2) biological arsenic removing is performed; 3) grinding is performed; 4) oxidizing roasting is performed, specifically, a mixture C obtained in the step 3) is subjected to oxidizing roasting under the weak oxidization atmosphere, the mixture C is constantly stirred in the oxidizing roasting process, flowing carrier gas is introduced and used for expelling a produced gas D, and a solid matter obtained after oxidizing roasting is completed is arsenic-removed iron ore; and 5) recovery is cycled. The method has a remarkable arsenic removing effect on the arsenic-contained iron ore, through mutual cooperation of biological arsenic removing and gasification arsenic removing, and the arsenic removing efficiency is effectively improved; and meanwhile, the produced gasification arsenic removing products are subjected to recovery and recycling treatment, environmental pollution to the environment is reduced, environment pollution is small, and comprehensive utilization of arsenic-contained ore resources can be achieved easily.

Description

technical field [0001] The invention relates to the technical field of ore processing, in particular to a method for removing arsenic from iron ore. Background technique [0002] Iron ore, as a mineral aggregate containing iron element or iron compound and can be economically utilized, is a very important raw material in iron and steel production enterprises. There are many impurities in iron ore, which can be divided into beneficial and harmful according to their impact on the smelting process and product quality. The common and most important harmful impurities are sulfur, phosphorus, arsenic, potassium, sodium, Fluorine etc. Among them, arsenic, as a harmful element in iron ore, will mostly enter pig iron during smelting, which will have a series of adverse effects on steel properties, such as causing cracks on the hot-worked surface of steel, reducing the impact toughness of steel, and increasing the brittleness of steel , thereby reducing the quality of steel and affe...

Claims

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Application Information

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IPC IPC(8): C22B1/11C22B1/02
CPCC22B1/02C22B1/11Y02P10/20
Inventor 孙启祥马驰孙法虎
Owner ZAOZHUANG SNKSAN INTELLIGENT MACHINERY CO LTD
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