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Slag harmless-treatment method and application of treated slag

A technology of harmless treatment and slag, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., to achieve the effects of easy acquisition, small use ratio and economical treatment cost

Pending Publication Date: 2021-02-02
王均
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the present invention provides a harmless treatment method for slag that is suitable for industrial applications and can be completely harmless, and the use of the treated slag, so as to reduce the waste of land resources caused by slag stacking , environmental pollution and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Harmless solidification and reduction treatment of 1kg of manganese slag

[0042] (1) Spread the manganese slag with a moisture content of about 25%-31% into a thin layer with a thickness of 3-5cm, and mix 2g of protein powder with the mass of 1kg of manganese slag with a moisture content of about 25%-31%. Ratio, the surface of the manganese slag is evenly sprayed by the pressure spray device, and the protein powder reacts with the water, sulfuric acid, ammonia, etc. Manganese is physically encapsulated.

[0043] (2) The flat slag is placed in a heating furnace and heated to a temperature of 150-600°C, and the water is formed into steam and enters the drying collection pipe; the metal ions covered by the gel evaporate together with the water vapor and enter the steam collection In pipes, the protein molecules in the gel are carbonized at high temperature. The collected gas is passed into the water washing pool for water washing desulfurization and deacidification t...

Embodiment 2

[0049] 1. Harmless solidification and reduction treatment of 3kg manganese slag

[0050] (1) Spread the manganese slag with a moisture content of about 25%-31% into a thin layer with a thickness of 3-5cm, and mix 5g of protein powder with the mass of 3kg of manganese slag with a moisture content of about 25%-31%. Ratio, the surface of the manganese slag is evenly sprayed by the pressure spray device, and the protein powder reacts with the water, sulfuric acid, ammonia, etc. Manganese is physically encapsulated.

[0051] (2) The flat slag is placed in a heating furnace and heated to a temperature of 150-600°C, and the water is formed into steam and enters the drying collection pipe; the metal ions covered by the gel evaporate together with the water vapor and enter the steam collection In pipes, the protein molecules in the gel are carbonized at high temperature. The collected gas is passed into the water washing pool for water washing desulfurization and deacidification trea...

Embodiment 3

[0057] 1. Harmless solidification and reduction treatment of 5kg of manganese slag

[0058] (1) Spread the manganese slag with a moisture content of about 25%-31% into a thin layer with a thickness of 3-5cm, and mix the protein powder 5g with the quality of 5kg of manganese slag with a moisture content of about 25%-31%. Ratio, the surface of the manganese slag is evenly sprayed by the pressure spray device, and the protein powder reacts with the water, sulfuric acid, ammonia, etc. Manganese is physically encapsulated.

[0059] (2) The flat slag is placed in a heating furnace and heated to a temperature of 150-600°C, and the water is formed into steam and enters the drying collection pipe; the metal ions covered by the gel evaporate together with the water vapor and enter the steam collection In pipes, the protein molecules in the gel are carbonized at high temperature. The collected gas is passed into the water washing tank for water washing desulfurization and deacidificati...

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Abstract

The invention provides a slag harmless-treatment method and application of treated slag. The slag harmless-treatment method comprises the following steps: carrying out physical moving treatment on part of heavy metallic salts in slag, so as to reduce the content of manganese in the slag from 2.35%-5.76% to about 500 mg / L of manganese soaked in water, wherein such heavy metals as copper, lead, zincand chromium all meet the national standards; and then carrying out curing reduction treatment on the metals remaining in the slag, so as to restore the available metallic salts remaining in the slagto the water-insoluble state, achieve the curing of metal elements, and thoroughly achieve the harmless treatment of the slag. The cost of protein powder used in the slag harmless-treatment method islow, the use ratio is low, and the acquisition is easy; during the harmless production and treatment, the heating temperature is controlled to be 150-600 DEG C, the energy consumption is low, and theslag harmless-treatment method is applicable to the large-scale batch treatment; furthermore, sulfate in a washing solution can be recycled; and the harmlessly-treated slag can be used as a raw material, an additive and an auxiliary material in the aspect of building materials and the like, thereby generating great economic benefits.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of solid waste, in particular to a method for harmless treatment of slag and the application of the treated slag. Background technique [0002] Toxic and harmful elements such as heavy metals remaining in manganese slag seriously threaten the ecological environment. These heavy metals such as copper, lead, zinc, chromium, etc. and sulfur-based acids, manganese in manganese slag, as the first of the five poisons, pollute soil and groundwater through surface water as a medium, and the sustainable development of social economy in mining areas and their ecology The environment is seriously threatened. At present, the amount of slag produced in the production of manganese is huge, about 7-9 tons of raw ore extract 1 ton of manganese, and produce 6-8 tons of slag. [0003] At present, the treatment method of slag is mainly by stacking, and the proportion of harmless treatment is extremely l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/45B09B3/21
Inventor 王均
Owner 王均
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