Multi-component resource utilization method for iron tailings

A technology of iron tailings and multi-components, applied in chemical instruments and methods, aluminum chloride, aluminum halide, etc., can solve the problems of difficult disposal of iron tailings and high cost of comprehensive utilization, achieve wide application and reduce acid consumption , the effect of improving the extraction rate

Pending Publication Date: 2021-05-14
SHENYANG ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a multi-component resource utilization method...

Method used

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  • Multi-component resource utilization method for iron tailings
  • Multi-component resource utilization method for iron tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Classification and separation equipment is used to classify and separate iron tailings according to the size of Al in iron tailings 2 o 3 and SiO 2 There is a negative correlation between the content and the strength, and the tailings pellets with a particle size of 95-115 mesh are sorted out to increase the aluminum-silicon content of the tailings pellets after sorting;

[0024] First add a certain amount of tailings pellets in the heating furnace, then add excess hydrochloric acid with a mass fraction of 20% and 1mol / mol Al ion mass fraction with 30% sulfuric acid at 120 Under the condition of ℃, stir to make the raw materials fully dissolve and react with the acid; after acid leaching, cool down to 80 ℃, filter while it is hot, and filter the residue for use, add sodium carbonate to the leaching solution to adjust the basicity of the solution to 60%, and obtain the liquid product polymerized aluminum bis-acid. The purity is 96.7%.

[0025] Adding 5mol / mol Al ion c...

Embodiment 2

[0028] Classification and separation equipment is used to classify and separate iron tailings according to the size of Al in iron tailings 2 o 3 and SiO 2 There is a negative correlation between the content and the strength, and the tailings pellets with a particle size of 95-115 mesh are sorted out to increase the aluminum-silicon content of the tailings pellets after sorting;

[0029] First add a certain amount of tailings pellets into the heating furnace, then add hydrochloric acid with a mass fraction of 20% and 1.5 mol / mol of Al ions with a mass fraction of 30% sulfuric acid at 130°C in the heating furnace Stir to make the raw material fully dissolve and react with the acid; after acid leaching, cool down to 80°C, filter while it is hot, and filter the residue for use, add sodium carbonate to the leaching solution to adjust the basicity of the solution to 80%, and obtain a liquid product, polymeric aluminum bis-acid, with a purity of 98.2%.

[0030] Adding 4mol / mol Al ...

Embodiment 3

[0033] Classification and separation equipment is used to classify and separate iron tailings according to the size of Al in iron tailings 2 o 3 and SiO 2 There is a negative correlation between the content and the strength, and the tailings pellets with a particle size of 95-115 mesh are sorted out to increase the aluminum-silicon content of the tailings pellets after sorting;

[0034] First add a certain amount of tailings pellets into the heating furnace, and then add hydrochloric acid with a mass fraction of 20% and 2 mol / mol Al ions with a mass fraction of 30% sulfuric acid in the heating furnace at 140°C , stirring to fully dissolve and react the raw materials with the acid; after acid leaching, cool down to 80°C, filter while it is hot, add sodium carbonate to the leaching solution to adjust the basicity of the solution to 70%, and obtain a liquid product, polymeric aluminum bis-acid, with a purity of 97.4%.

[0035] Adding 3mol / mol Al ion concentration after washing ...

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Abstract

The invention discloses a multi-component resource utilization method of iron tailings, which aims to solve the problems of low product compactness and low strength in the process of making building materials such as bricks, cement and the like in a common utilization method of the iron tailings. The method comprises the following steps of: screening raw materials with high content of aluminum and silicon by adopting an iron tailings grading and sorting technology, performing wet leaching on the raw materials, adjusting the leachate through a salt base to obtain a polymeric aluminum diacid product, performing wet leaching treatment on leaching residues, and washing and drying to obtain a white carbon black product. According to the technology, the aluminum oxide and silicon dioxide contents of the obtained raw materials are increased through iron tailing grading and sorting. The raw materials are subjected to acid leaching and alkali washing leaching by adopting a wet leaching process to respectively obtain the products polymeric aluminum diacid and white carbon black, so that the extraction rate of aluminum and silicon is improved, and the acid consumption is reduced. The method has the advantages of being flexible in system, wide in application range, good in economical efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of resource utilization of iron tailings, in particular to a multi-component resource utilization method of iron tailings, which belongs to the technical field of comprehensive utilization of industrial solid waste. Background technique [0002] In recent years, the country has paid more and more attention to the field of comprehensive utilization of industrial solid waste. With the "Interim Measures for the Evaluation and Management of Comprehensive Utilization of Industrial Solid Waste Resources" and the "National Catalog of Products for Comprehensive Utilization of Industrial Solid Waste Resources" issued by the Ministry of Industry and Information Technology in May 2018 》, which aims to establish a scientific and standardized evaluation mechanism for the comprehensive utilization of industrial solid waste resources, and guide enterprises to actively carry out comprehensive utilization of industrial solid ...

Claims

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Application Information

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IPC IPC(8): C01F7/56C01B33/193C01F7/68
CPCC01F7/56C01B33/193C01F7/68C01P2006/80
Inventor 陈朝中
Owner SHENYANG ACAD OF ENVIRONMENTAL SCI
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