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Method for preparing glass ceramic from waste residues related to severe hazards

A technology of glass ceramics and waste slag, which is applied in the field of waste resource utilization, can solve the problems of unbearable economic costs, high operating costs, and high energy consumption, and achieve the effects of energy saving, strong market competitiveness, and good performance

Inactive Publication Date: 2019-04-05
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the high-temperature smelting reduction method for treating heavy and hazardous waste is high energy consumption. Since the high-temperature smelting reduction temperature requirement is higher than 1200°C, the energy consumption is too high. For general enterprises, the operating cost is very high, and the economic cost is difficult to bear.

Method used

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  • Method for preparing glass ceramic from waste residues related to severe hazards
  • Method for preparing glass ceramic from waste residues related to severe hazards
  • Method for preparing glass ceramic from waste residues related to severe hazards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 A method for preparing glass-ceramics by utilizing heavy and hazardous waste residues, comprising the following steps:

[0033] (1) Using heavy and hazardous waste residue as the main material, 17 parts of iron ore, 15 parts of quicklime, 15.9 parts of quartz sand, 3.5 parts of fluorite as auxiliary materials, 2.2 parts of coke and 4.6 parts of spent anode carbon blocks as reducing substances , mix auxiliary materials and reducing substances with 100 parts of heavy hazardous waste residue HW17 (electroplating sludge), and press them into block materials;

[0034] (2) Put the bulk material into the heating furnace, and heat and melt at 1250°C for reduction, the obtained metal alloy flows out from the tap hole, and the obtained hot slag flows out from the slag discharge port; take a little hot slag and quench it with water The water-quenched slag was obtained, and the chemical composition of the water-quenched slag was analyzed (see Table 1 for the compositio...

Embodiment 2

[0047] A method for preparing glass-ceramics by utilizing heavy and hazardous waste slag, comprising the following steps:

[0048] (1) With 15 parts of quicklime, 2 parts of fluorite, and 3 parts of soda ash as auxiliary materials, and 10 parts of coke powder as reducing substances, the auxiliary materials and reducing substances are mixed with 100 parts of heavy hazardous waste residue HW48 (copper slag), and pressed Form into lumps, heat and melt at 1300°C, take a small amount of hot molten slag from the slag outlet and water-quench to obtain water-quenched slag after hazardous waste treatment, and analyze the chemical composition of the water-quenched slag (results are shown in Table 2).

[0049] (2) 10 parts of stainless steel slag and 5 parts of soda ash are mixed evenly, and then made into 5 mm spherical conditioning material particles;

[0050] (3) Introduce the hot slag involved in the treatment of heavy hazardous waste slag into the melting furnace through the slag di...

Embodiment 3

[0061] Basically the same as Example 1, the difference is:

[0062] (1) 54 parts of quartz sand, 6.5 parts of magnesium oxide, and 3.6 parts of soda ash are ball milled and mixed to make spherical conditioning material particles;

[0063] (2) According to the weight ratio of thermal slag: conditioning material 100:55, the spherical conditioning material is added to the thermal slag obtained in step (4) of Example 1;

[0064] (3) Add heat to the hot slag mixed with tempering material by electrode heating, perform high temperature tempering, and keep it in the high temperature range of 1400 ° C for 2 hours to obtain a melt;

[0065] (4) Preheating the pipe-making mold to 550°C, pouring the melt into the preheated mold for molding;

[0066] (5) Send the formed glass tube into a microwave roller kiln, heat it at 580°C for 30 minutes for annealing treatment, then raise the temperature to 800°C, hold it for 50 minutes for crystallization;

[0067] (6) Cool to room temperature to o...

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Abstract

The invention provides a method for preparing glass ceramic from waste residues related to severe hazards. The high-entropy glass ceramic can be prepared by the aid of the method at a low cost in an environment-friendly manner. The method has the advantages that the problem of high energy consumption in high-entropy glass ceramic production procedures can be pertinently solved by the aid of the method; hot melt residues at the temperatures higher than 1100 DEG C are utilized, heat supplementing, quenching and tempering are carried out by the aid of residue melting furnaces, accordingly, the high-entropy glass ceramic can be produced by the aid of the method, energy consumption can be reduced to a great extent, the method conforms to the current national energy conservation and emission reduction policy and is important technical innovation for production in the national hazardous waste industry, and the hazardous waste recycling and reusing additional values can be sufficiently maximized; diversified trace heavy metal elements in the hazardous waste residues which are subjected to high-temperature melting-reduction treatment are excellent nucleating agents, accordingly, the anticorrosion and abrasion-resistant high-entropy glass ceramic which is high in strength and hardness and excellent in high-temperature heat stability can be prepared without optional additional nucleatingagents in tests, the manufacturing cost of the glass ceramic further can be reduced, and the method is extremely high in market competitiveness.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste, and relates to a method for producing glass ceramics by using heavy and hazardous waste slag, in particular to a method for directly using high-temperature smelting reduction to process the hot slag produced by heavy and hazardous waste slag for tempering to produce glass ceramics . Background technique [0002] Heavy and hazardous waste generally refers to hazardous waste containing toxic metals, including expired catalysts, used batteries, waste solar panels, electronic waste, electroplating waste, pickling waste, smelting waste, cyanide slag, etc. There are many types of heavy and hazardous waste, The quantity is huge. The new version of the "National List of Hazardous Wastes" has a total of 46 categories, 17 of which are hazardous wastes. In 2015, the national industrial hazardous waste production volume was 42.2 million tons, and the hazardous waste involved was 15-20 million t...

Claims

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Application Information

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IPC IPC(8): C03C10/04C03C10/06C03C6/10C03C6/00C03C6/06C03C6/04
CPCC03C1/002C03C10/0009C03C10/0036
Inventor 李保卫张雪峰沈保根李世龙邓磊波赵增武赵同云贾晓林马强
Owner INNER MONGOLIA UNIV OF SCI & TECH
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