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Method for preparing curing agent by using gas-making slag and mineral waste residues as raw materials

A curing agent and gas-making technology, which is applied in cement production and other fields, can solve the problems of cracking of building materials and low material strength, and achieve the effects of low production cost, improved mechanical strength, and wide source of raw materials

Active Publication Date: 2020-07-17
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of free calcium in gas-making slag is high, and the strength of the material is low when directly preparing building materials, and even the building materials may crack due to the hydration and expansion of free calcium oxide. Therefore, it is necessary to study the safe and efficient utilization method of gas-making slag Very necessary

Method used

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  • Method for preparing curing agent by using gas-making slag and mineral waste residues as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Mix 20 parts of gas-forming slag, 2 parts of carbide slag, 0.03 part of borax and 5 parts of water evenly to make a mixture, and activate the mixture at 40°C for 3 hours;

[0023] 2) After the activated mixture is dried, it is mixed evenly with 55 parts of dry slag, 10 parts of modified gypsum, 3 parts of clinker and 1 part of polysilicon waste residue to obtain a curing agent with a specific surface area of ​​544 m 2 / kg.

[0024] The strength of the curing agent is tested according to GB / T17671-1999 "Cement Mortar Strength Test Method (ISO Method)".

Embodiment 2

[0026] 1) Mix 25 parts of gas-forming slag, 3.5 parts of carbide slag, 0.06 part of borax and 5 parts of water evenly to make a mixture, and activate the mixture at 50°C for 2 hours;

[0027] 2) After the activated mixture is dried, it is mixed evenly with 40 parts of dry slag, 7 parts of modified gypsum, 5 parts of clinker and 10 parts of polysilicon waste residue to obtain a curing agent with a specific surface area of ​​462 m 2 / kg.

[0028] The strength of the curing agent is tested according to GB / T17671-1999 "Cement Mortar Strength Test Method (ISO Method)".

Embodiment 3

[0030] 1) Mix 30 parts of gas-forming slag, 5 parts of carbide slag, 0.08 part of borax and 5 parts of water evenly to make a mixture, and activate the mixture at 60°C for 1 hour;

[0031] 2) After the activated mixture is dried, it is evenly mixed with 48 parts of dry slag, 5 parts of modified gypsum, 1 part of clinker and 6 parts of polysilicon waste residue to obtain a curing agent with a specific surface area of ​​416 m 2 / kg.

[0032] The strength of the curing agent is tested according to GB / T17671-1999 "Cement Mortar Strength Test Method (ISO Method)".

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Abstract

The invention relates to a method for preparing a curing agent by using gas-making slag and mineral waste residues as raw materials. The method comprises the following steps: 1) grinding gas-making slag, carbide slag and borax to a size of 400-450 m<2> / kg, adding water, carrying out uniform mixing to prepare a mixture, and activating the mixture at 40-60 DEG C for 1-3 hours; and 2) drying the activated mixture, mixing the dried mixture with dried mineral waste residues, modified gypsum, polycrystalline silicon waste residues and other materials, and carrying out grinding to obtain the curing agent. According to the characteristics of different materials, a plurality of materials are cooperated to prepare the curing agent with high strength, and the curing agent can be applied to underground mine filling and urban garbage curing. The method is simple in process and low in energy consumption, has the characteristics of wide raw material sources, high waste residue mixing amount and low production cost, and produces positive social benefits and economic benefits for resource utilization of solid wastes and environmental protection.

Description

technical field [0001] The invention relates to a method for preparing a curing agent, in particular to a method for preparing a curing agent by using gas-making slag-slag as a raw material. Background technique [0002] In recent years, with the country's structural adjustment of the cement industry's production capacity and the implementation of the production restriction policy, the price of cement products has continued to rise. In 2019, 32.5# cement reached 400 yuan / ton, and 42.5# cement exceeded 500 yuan / ton. The rise in cement prices has directly increased the production costs of related application companies, causing certain difficulties in production and operation, and has a greater impact on companies in low value-added fields such as underground mine backfilling and sludge solidification. [0003] Gas-making slag is a mixture of 25% lime powder and 75% anthracite coal powder mixed into balls in the production process of chemical companies, especially chemical fer...

Claims

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Application Information

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IPC IPC(8): C04B7/24C04B7/21
CPCC04B7/21C04B7/24Y02P40/10
Inventor 王荣耕马田宇王霄汉潘鹏聪刘进丽苗俊仟马文文王丹王晓虹苏光亮孙雨
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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