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A preparation method of cemented filling material for mining with resource utilization of cadmium-containing hazardous waste

A hazardous waste and cemented filling technology, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of high cost, large area of ​​follow-up safe landfill, large capacity expansion ratio, etc., to achieve The effect of high cost, large floor area and large capacity increase ratio

Active Publication Date: 2019-06-28
北科蕴宏环保科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solidification / stabilization technology in the existing technology faces the problems of high cost, large capacity increase ratio, and large landfill area for subsequent safe landfills

Method used

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  • A preparation method of cemented filling material for mining with resource utilization of cadmium-containing hazardous waste
  • A preparation method of cemented filling material for mining with resource utilization of cadmium-containing hazardous waste
  • A preparation method of cemented filling material for mining with resource utilization of cadmium-containing hazardous waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A gelling agent for mines, prepared from the following raw materials in percentage by weight:

[0040] Slag 54%

[0041] Steel slag 35%

[0042] Desulfurization gypsum 11%

[0043] A method for preparing cemented filling materials for mines for co-processing hazardous wastes containing cadmium, characterized in that: the activated cement, aggregates, hazardous wastes containing cadmium, water reducer, and water are mixed uniformly, specifically Proceed as follows:

[0044] (1) Dry the required raw material slag, steel slag, and desulfurized gypsum to a moisture content of 0.01% to 1%, and then separately powder the slag, steel slag, and desulfurized gypsum according to the dry weight percentage of 54%, 35%, and 11%. Grind to a specific surface area of ​​450m 2 / Kg, 480m 2 / Kg, 360m 2 / Kg mixes in the blender and makes cementing agent;

[0045] (2) Dry the hazardous waste containing cadmium to a moisture content of 0.01% to 1% and grind it to a specific surface ar...

Embodiment 2

[0060] A gelling agent for mines, prepared from the following raw materials in percentage by weight:

[0061]

[0062] A method for preparing cemented filling materials for mines for co-processing hazardous wastes containing cadmium, characterized in that: the activated cement, aggregates, hazardous wastes containing cadmium, water reducer, and water are mixed uniformly, specifically Proceed as follows:

[0063] (1) Dry the required raw material slag, steel slag, and phosphogypsum to a moisture content of 0.01% to 1%, and then separately powder the slag, steel slag, and phosphogypsum at 45%, 20%, and 13% by weight on a dry basis. Grind to a specific surface area of ​​400m 2 / Kg, 460m 2 / Kg, 360m 2 / Kg, and dried to moisture content of 0.01% ~ 1%, respectively 15% and 7% on a dry basis, and ground to 360m 2 / Kg, 300m 2 / Kg of granulated ferrochromium slag and fly ash are mixed in a mixer to make a cement;

[0064] (2) Dry the hazardous waste containing cadmium to a moi...

Embodiment 3

[0080] A gelling agent for mines, prepared from the following raw materials in percentage by weight:

[0081]

[0082] A method for preparing cemented filling materials for mines for co-processing hazardous wastes containing cadmium, characterized in that: the activated cement, aggregates, hazardous wastes containing cadmium, water reducer, and water are mixed uniformly, specifically Proceed as follows:

[0083] (1) Dry the required raw material slag, steel slag, desulfurized gypsum, and fluorine gypsum to a moisture content of 0.01% to 1%, and then dry the slag, steel slag, desulfurized gypsum, and fluorine gypsum to 42% and 20% by weight on a dry basis, respectively. %, 8%, 5% are individually ground to a specific surface area of ​​480m 2 / Kg, 510m 2 / Kg, 330m 2 / Kg, 310m 2 / Kg, and dried to a moisture content of 0.01% to 1%, respectively 15% and 10% on a dry basis, and individually ground to 440m 2 / Kg, 370m 2 / Kg of granulated electric furnace phosphorus slag and ...

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Abstract

The invention provides a mine cemented filling material for co-processing cadmium-containing hazardous wastes and a preparation method of the mine cemented filling material. The method comprises the following steps: firstly performing activating treatment and uniformly mixing 30 to 90 percent of required material slag, 0 to 50 percent of steel slag and 5 to 20 percent of industrial by-product gypsum, with the water content being 0.01 to 1 percent, in dry basis weight percent to obtain a cementing agent, then adding 0 to 1 percent of a water reducer according to the weight ratio of the cementing agent to aggregate being 1 / 4 to 1 / 8 and the weight ratio of cadmium-containing hazardous wastes with the water content being 0.01 to 1 percent to the cementing agent and the aggregate being 1 / 100 to 1 / 10, ensuring that the mass fraction of slurry is 65 to 82 percent, and uniformly stirring, so as to obtain a qualified filling material. According to the method, an all solid waste system is utilized to prepare the mine cemented filling material, meanwhile the cadmium-containing hazardous wastes are synergistically cured, the leaching concentration of solidified filling material cadmium is lower than a drinking water standard, and the environmental problem caused by leaching toxicity and a large amount of land required by landfilling of the cadmium-containing hazardous wastes is solved.

Description

technical field [0001] The invention relates to the technical field of cemented filling in mines, resource utilization of solid waste and cooperative disposal of hazardous waste containing cadmium, in particular to a preparation method of cemented filling material for mines for resource utilization of hazardous waste containing cadmium. Background technique [0002] The current industrial system is actually a process of mining resources and discharging waste. Mining activities are the main source of waste discharge to the environment, and its solid waste discharge accounts for 80% to 85% of industrial waste discharge. Tailings, waste rock, coal gangue, fly ash and smelting slag produced during the development and utilization of domestic mineral resources have become the largest industrial solid waste discharge, accounting for 85% of the total solid waste discharge in the country. Mine mining left a large area of ​​mined-out area, stacked waste rocks, waste slag yards and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/16C04B28/14C04B18/14C04B18/04C04B18/12
CPCC04B28/142C04B28/143C04B28/144C04B28/165C04B2201/50C04B18/12C04B18/142C04B18/141C04B18/0472C04B24/18C04B22/002C04B14/068C04B18/08C04B2103/302C04B11/264C04B18/04Y02W30/91
Inventor 倪文高巍张宁耿碧瑶任超王佳佳杨恒
Owner 北科蕴宏环保科技(北京)有限公司
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