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An admixture for improving the activity of thermally excited coal gangue

A technology of admixture and coal gangue, applied in the field of building materials science, can solve the problems of low activity of coal gangue powder, affecting large-scale promotion and industrial application, etc.

Active Publication Date: 2018-10-16
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coal gangue powder generally has low activity, which affects its large-scale promotion and industrial application. Activation treatment of coal gangue to increase activity is the most effective way to increase the utilization of coal gangue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An admixture for improving the activity of thermally stimulated coal gangue is composed of the following raw materials in weight percent: 10% calcium acetate, 5% dicalcium hydrogen phosphate, 5% sodium metaaluminate, 1% silane coupling agent, and maltodextrin 2%, triethanolamine 5%, triethanolamine borate 2%, sodium metaborate 6%, carboxymethylhydroxymalonic acid 1%, diethylenetriaminepentaacetic acid 0.8%, diatomaceous earth 20%, and the balance is limestone pink.

[0025] The silane coupling agent is γ-methacryloxypropyltrimethoxysilane, and its molecular formula is: CH 2 =C(CH 3 )COOC 3 h 6 Si(OCH 3 ) 3 ; The maltodextrin DE (Dextrose Equivalent) value is between 8-12; The specific surface area of ​​the limestone powder is 450m 2 / kg, CaCO 3 The content is 94%.

Embodiment 2

[0027] An admixture for improving the activity of thermally stimulated coal gangue, which is composed of the following raw materials in weight percentage: 5% calcium acetate, 2% dicalcium hydrogen phosphate, 2% sodium metaaluminate, 0.1% silane coupling agent, maltodextrin 0.5%, 1% triethanolamine, 1% triethanolamine borate, 3% sodium metaborate, 0.5% carboxymethylhydroxymalonic acid, 0.2% diethylenetriaminepentaacetic acid, 10% diatomaceous earth, and the balance is limestone pink.

[0028] The silane coupling agent is γ-methacryloxypropyltrimethoxysilane, and its molecular formula is: CH 2 =C(CH 3 )COOC 3 h 6 Si(OCH 3 ) 3 ; The maltodextrin DE (Dextrose Equivalent) value is between 6-8; The specific surface area of ​​the limestone powder is 400m 2 / kg, CaCO 3 The content is 90%.

Embodiment 3

[0030] An admixture for improving the activity of thermally stimulated coal gangue is composed of the following raw materials in weight percent: 8% calcium acetate, 3% dicalcium hydrogen phosphate, 4% sodium metaaluminate, 0.5% silane coupling agent, maltodextrin 1.2%, triethanolamine 2%, triethanolamine borate 1.5%, sodium metaborate 4%, carboxymethylhydroxymalonic acid 0.8%, diethylenetriaminepentaacetic acid 0.6%, diatomaceous earth 15%, and the balance is limestone pink.

[0031] The silane coupling agent is γ-methacryloxypropyltrimethoxysilane, and its molecular formula is: CH 2 =C(CH 3 )COOC 3 h 6 Si(OCH 3 ) 3 ; The maltodextrin DE (Dextrose Equivalent) value is between 7-9; The specific surface area of ​​the limestone powder is 500m 2 / kg, CaCO 3 The content is 96%.

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Abstract

The invention provides an additive for improving the activity of thermal activated coal gangue. The additive is prepared from the following raw materials in percentage by weight: 5 to 10 percent of calcium acetate, 2 to 5 percent of dicalcium phosphate, 2 to 5 percent of sodium metaaluminate, 0.1 to 1 percent of silane coupling agents, 0.5 to 2 percent of maltodextrin, 1 to 5 percent of triethanolamine, 1 to 2 percent of borate triethanolamine ester, 3 to 6 percent of sodium metaborate, 0.5 to 1 percent of carboxymethyl hydroxyl malonic acid, 0.2 to 0.8 percent of diethylenetriamine pentaacetic acid, 10 to 20 percent of kieselguhr and the balance limestone flour. Various chemical additives in the additive provided by the invention achieve the cooperated effect; the activity of the thermal activated coal gangue can be effectively improved.

Description

technical field [0001] The invention belongs to the field of building material science, and in particular relates to an admixture for improving the activity of thermally excited coal gangue. Background technique [0002] Coal gangue is solid waste discharged during the coal mining process and coal washing process, and is one of the largest industrial solid wastes in China. If a large amount of coal gangue is discarded, it will occupy a large area of ​​land and the escape or leaching of sulfide in it will pollute the atmosphere, farmland and water. The resource utilization of coal gangue has become an urgent problem to be solved in environmental protection and sustainable development. At present, there are many ways to utilize coal gangue, the most important of which is to produce building materials. Coal gangue powder generally has low activity, which affects its large-scale promotion and industrial application. Activation treatment of coal gangue to increase activity is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42
CPCC04B40/0039C04B24/04C04B22/16C04B22/0093C04B24/42C04B24/38C04B24/122C04B22/0013C04B24/06C04B24/121C04B14/08C04B14/28
Inventor 冯恩娟傅秀新张康刘云赵洪义刘秀敏
Owner SHANDONG HONGYI TECH
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