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: 2022-06-24
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

Method used

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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 cementitious material, which, in terms of mass percentage, includes the following components: 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-mentioned composite admixture is naphthalene sulfonate, sodium carbonate and calcium hydroxide with a mass ratio of 5:2:2.

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

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

[0049] The components are crushed, pulverized, and evenly mixed 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 to partial melting, the calcination temperature is 1400°C to 1...

Embodiment 2

[0057] The embodiment of the present invention provides a paste filling cementitious material, which, in terms of mass percentage, includes the following components: 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 naphthalene sulfonate, 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] Weigh each component according to the following proportions: limestone raw material 87%, lead-zinc tailings 6%, shale 4% and 3% slag;

[0061] The components are crushed, pulverized, and evenly mixed to obtain raw meal;

[0062] After being preheated by a suspension preheater, the above-mentioned raw meal is sent to a cement kiln for calcination to partial melting, the calcination temperature is 1500°C t...

Embodiment 3

[0069] The embodiment of the present invention provides a paste filling cementitious material, which, in terms of mass percentage, includes the following components: 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 naphthalene sulfonate, 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: limestone raw material 80%, lead-zinc tailings 15%, shale 2% and 3% slag;

[0073] The components are crushed, pulverized, and evenly mixed to obtain raw meal;

[0074] After being preheated by a suspension preheater, the above-mentioned raw meal is sent to a cement kiln for calcination to partial melting, the calcination temperature is 1450°C ...

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Abstract

The invention relates to the technical field of mining engineering, and specifically discloses a paste filling cementing material and a paste filling slurry. The paste filling cementing material includes the following components in terms of mass percentage: high-alite Portland cement clinker: 55% to 65%, steel slag: 25% to 35%, nano-SiO 2 : 2% ~ 5%, nano-CaCO 3 : 2% to 3%, modified gypsum 2% to 6% and compound admixture 0.1% to 0.5%. The invention uses industrial solid waste steel slag as raw material, has simple process, not only greatly reduces production cost, provides guarantee for green mining of mines, but also provides a new way for comprehensive utilization of industrial solid waste. The paste filling cementing material is used to prepare paste filling slurry, which solves the problems of low early strength of the paste filling material, poor slurry fluidity, high cost and energy consumption, and the like.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a paste filling cementitious material and a paste filling slurry. Background technique [0002] The solid material discarded by the steelmaking industry is called steel slag. By 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 causes serious environmental pollution. Therefore, how to achieve sustainable and efficient utilization of steel slag is imminent. [0003] On the other hand, most of the domestic mines use paste filling mining method for mining, which can effectively control the mine ground pressure activities and effectively solve the problem of how to exploit the "three lower" coal resources. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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