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Paste filling cementing material and paste filling slurry

A paste filling and cementing material technology, which is applied in the field of paste filling cementing materials and paste filling slurry, can solve the problems of low early strength, high cost and energy consumption, and poor slurry fluidity of paste filling materials

Active Publication Date: 2021-12-31
河北充填采矿技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a paste filling cementing material and a paste filling slurry, which promotes the early crystallization of the hydration of the paste cementing material by using a composite admixture formed of naphthalene sulfonate, sodium carbonate and calcium hydroxide Nucleation to solve the problems of low early strength, poor slurry fluidity and high cost and energy consumption of paste filling materials

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  • Paste filling cementing material and paste filling slurry

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Effect test

Embodiment 1

[0045] The embodiment of the present invention provides a paste filling cementing material, which includes the following components in terms of mass percentage: high alite Portland cement clinker: 55%, steel slag: 34.5%, nano-SiO 2 : 5%, Nano CaCO 3 : 2%, modified gypsum 2% and compound admixture 0.5%.

[0046] The above composite additives are naphthalenesulfonate, sodium carbonate and calcium hydroxide in a mass ratio of 5:2:2.

[0047] The preparation method of above-mentioned high alite Portland cement clinker comprises the following steps:

[0048] Each component was weighed according to the following proportions: 78% limestone raw material, 8% lead-zinc tailings, 11% shale and 3% slag;

[0049] The components are crushed, ground, and mixed uniformly to obtain raw meal;

[0050] After being preheated by a suspension preheater, the above-mentioned raw meal is sent to a cement kiln for calcination until it is partially melted. The calcination temperature is 1400°C-1450°C...

Embodiment 2

[0057] The embodiment of the present invention provides a paste filling cementing material, which includes the following components in terms of mass percentage: high alite Portland cement clinker: 60%, steel slag: 30%, nano-SiO 2 : 3%, Nano CaCO 3 : 3%, modified gypsum 3.8% and compound admixture 0.2%.

[0058] The above-mentioned composite admixture includes naphthalenesulfonate, sodium carbonate and calcium hydroxide in a mass ratio of 6:3:3.

[0059] The preparation method of above-mentioned high alite Portland cement clinker comprises the following steps:

[0060] Each component is weighed according to the following ratio: 87% of limestone raw material, 6% of lead-zinc tailings, 4% of shale and 3% of slag;

[0061] The components are crushed, ground, and mixed uniformly to obtain raw meal;

[0062] After being preheated by the suspension preheater, the above-mentioned raw meal is sent to the cement kiln for calcination until it is partially melted, the calcination tempe...

Embodiment 3

[0069] The embodiment of the present invention provides a paste filling cementing material, which includes the following components in terms of mass percentage: high alite Portland cement clinker: 64.9%, steel slag: 25%, nano-SiO 2 : 2%, Nano CaCO 3 : 2%, modified gypsum 6% and compound admixture 0.1%.

[0070] The above-mentioned composite admixture includes naphthalenesulfonate, sodium carbonate and calcium hydroxide in a mass ratio of 5:1:1.

[0071] The preparation method of above-mentioned high alite Portland cement clinker comprises the following steps:

[0072] Weigh each component according to the following proportions: 80% limestone raw material, 15% lead-zinc tailings, 2% shale and 3% slag;

[0073] The components are crushed, ground, and mixed uniformly to obtain raw meal;

[0074] After being preheated by the suspension preheater, the above raw meal is sent to the cement kiln for calcination until it is partially melted, the calcination temperature is 1450°C-150...

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Abstract

The invention relates to the technical field of mining engineering, and particularly discloses a paste filling cementing material and a paste filling slurry. The paste filling cementing material is prepared from, by mass, 55-65% of high alite Portland cement clinker, 25-35% of steel slag, 2-5% of nano SiO2, 2- 3% of nano CaCO3, 2-6% of modified gypsum and 0.1-0.5% of a compound additive. The industrial solid waste steel slag is used as the raw material, the process is simple, the production cost is greatly reduced, a guarantee is provided for green mining of mines, and a new way is provided for comprehensive utilization of industrial solid wastes. The paste filling cementing material is used for preparing paste filling slurry, and the problems that the paste filling material is low in early strength, poor in slurry fluidity, high in cost and energy consumption and the like are solved.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a paste filling cementing material and a paste filling slurry. Background technique [0002] The solid material discarded in the steelmaking industry is called steel slag. As of 2020, the cumulative stock of steel slag in China has reached nearly 2 billion tons. Due to the low early strength and poor stability of steel slag, the total utilization rate of steel slag in my country is only about 22%, and the long-term discharge of steel slag leads to the occupation of a large amount of land and serious environmental pollution. Therefore, how to realize sustainable and efficient utilization of steel slag It is imminent. [0003] On the other hand, most mines in China adopt the paste filling mining method for mining, which can effectively control the ground pressure activities in the mine and effectively solve the problem of how to mine the "three down" coal resources. The...

Claims

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Application Information

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IPC IPC(8): C04B7/345C04B7/17C04B7/36C04B24/20C04B28/02
CPCC04B7/3456C04B7/17C04B7/36C04B40/0039C04B28/028C04B2111/00724C04B2201/50C04B24/20C04B22/10C04B22/064C04B18/08C04B18/12Y02P40/10
Inventor 贾靖卢志敏王学伟秦大健郝永超董小娟
Owner 河北充填采矿技术有限公司
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