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Method for harmless and resourceful treatment of metallurgical hazardous waste

A hazardous waste and recycling technology, applied in the fields of comprehensive utilization of resources and environmental protection, can solve problems such as low added value of products, high environmental risks, and difficulty in recycling, and achieve significant social benefits and economic value, high degree of recycling, The effect of simple preparation process

Inactive Publication Date: 2017-02-01
李国标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at problems such as low added value of products and potential risks of secondary pollution in the existing hazardous waste treatment and disposal technology, as well as problems such as difficulty in recycling resources, high energy consumption for treatment, and high environmental risks in the treatment and disposal process, and proposes the use of microwave Microcrystallization treatment technology for hazardous waste to achieve high-efficiency, low-consumption harmless and resource-based treatment of hazardous waste

Method used

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  • Method for harmless and resourceful treatment of metallurgical hazardous waste
  • Method for harmless and resourceful treatment of metallurgical hazardous waste
  • Method for harmless and resourceful treatment of metallurgical hazardous waste

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The method for harmless and resourceful treatment of metallurgical hazardous wastes described in the present invention comprises the following specific steps:

[0033] (1) Pretreatment and batching and mixing: take hazardous waste 1# and auxiliary materials. The microwave output power range for drying hazardous waste slag is 1kW, and the drying time is 20min; the microwave output power range for drying auxiliary materials is 0.5kW, and the drying time is 12min. The dried hazardous waste and auxiliary materials were ball-milled and sieved to 180 meshes, and the under-sieves were taken for batching (see Table 1) and mixing.

[0034] Table 1 Proportion 1#

[0035]

[0036] (2) Vitrification: Vitrification is prepared by heating in an electric furnace and heating to 1250°C for 3 hours;

[0037] (3) Microcrystallization: The three-stage microcrystallization heat treatment method is the temperature range of the first stage: 1250 to 1100°C, the cooling rate is 8°C / min; the...

Embodiment 2

[0045] The method for harmless and resourceful treatment of metallurgical hazardous wastes described in the present invention comprises the following specific steps:

[0046] (1) Pretreatment and batching and mixing: take hazardous waste 2# and auxiliary materials, the microwave output power range for drying hazardous waste slag is 2kW, and the drying time is 10min; the microwave output power range for drying auxiliary materials is 1kW, and the drying time is 5min. The dried hazardous waste and auxiliary materials were ball-milled and sieved to 160 meshes, and the under-sieves were taken for batching (see Table 4) and mixing.

[0047] Table 4 Proportion 2#

[0048]

[0049] (2) Vitrification: vitrification is prepared by heating in an electric furnace and heating to 1350°C for 2 hours;

[0050] (3) Microcrystallization: The three-stage microcrystallization heat treatment method is the temperature range of the first stage: 1350 to 1120°C, the cooling rate is 8°C / min; the mi...

Embodiment 3

[0057] The method for harmless and resourceful treatment of metallurgical hazardous wastes described in the present invention comprises the following specific steps:

[0058] (1) Pretreatment and batching and mixing: take hazardous waste 3# and auxiliary materials, the microwave output power range for drying hazardous waste slag is 1.5kW, and the drying time is 15min; the microwave output power range for drying auxiliary materials is 0.7kW, and the drying time is 9min . The dried hazardous wastes and auxiliary materials were ball milled and sieved with a mesh number of 180, and the undersize was taken for batching (see Table 7) and mixing.

[0059] Table 7 ratio 3#

[0060]

[0061]

[0062] (2) Vitrification: vitrification is prepared by microwave heating, heating to 1450°C for 30 minutes;

[0063] (3) Microcrystallization: The three-stage microcrystallization heat treatment method is the temperature range of the first stage: 1450 to 1100°C, the cooling rate is 15°C / m...

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Abstract

The invention relates to a method for harmless and resourceful treatment of metallurgical hazardous waste and belongs to the technical field of comprehensive utilization of resources and environment protection. The method for harmless and resourceful treatment of the metallurgical hazardous waste comprises the following specific steps that 1, pretreatment is performed, wherein microwaves are adopted to dry hazardous waste and an auxiliary material respectively, and the dried hazardous waste and the auxiliary material are ball-milled and screened; 2, material preparation and mixing are performed, wherein a screen underflow is taken, material preparation and mixing are performed in proportion to obtain a mixture; 3, vitrification is performed, wherein vitrification treatment is conducted on the mixture by adopting a traditional heating mode or microwave high-temperature molten glass; 4, three-section type micro-crystallization is performed, wherein treatment is performed by adopting microwaves and a three-section type micro-crystallization heat treatment method to obtain a microcrystal material. The method is simple in preparation process, high in resourceful degree and low in cost and has a remarkable social benefit and an economic value.

Description

technical field [0001] The invention relates to a method for harmless and resource-based treatment of metallurgical hazardous waste, which belongs to the technical fields of resource comprehensive utilization and environmental protection. Background technique [0002] The national "Twelfth Five-Year Plan for the Prevention and Control of Pollution by Hazardous Wastes" clearly states that "it is necessary to strengthen the harmless utilization and disposal of hazardous wastes containing heavy metals. Harmful utilization and disposal, and promote the construction of non-ferrous metal smelting hazardous waste utilization and disposal bases”, the prevention and control of heavy metal pollution is still the top priority of the 13th Five-Year Plan, and hazardous waste poses serious harm to the environment. The disposal of metallurgical engineering industrial hazardous waste (such as chromium slag, smelting sludge, etc.) is to reduce the amount of solid waste generated, reduce the ...

Claims

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Application Information

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IPC IPC(8): C03C3/062C03B32/02B09B3/00
CPCC03B32/02C03C10/0063B09B3/40
Inventor 李国标王少龙李桥龙谢容生王瑞山
Owner 李国标
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