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Metal mine underground filling cementing material as well as preparation method and application thereof

A technology for cementitious materials and mines, which is applied in the fields of backfill, mining equipment, earthwork drilling, etc. It can solve the problems of easy water accumulation in the goaf, high strength requirements of the backfill body, and small particle size of tailings, so as to achieve the convenience of use. , the effect of strong ability to adapt to local conditions

Inactive Publication Date: 2022-02-15
FENY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the price of cement continues to rise, the proportion of cementing materials in the filling cost is increasing; and the underground environment of metal mines is complex, and the goaf is prone to water accumulation and high humidity. With the continuous development of mineral processing technology, The tailings particle size is getting smaller and smaller; the early strength requirements of the filling body are high. Obviously, the traditional cementitious material cement can no longer meet the production needs, and it is urgent to find a new cementitious material to replace cement.

Method used

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  • Metal mine underground filling cementing material as well as preparation method and application thereof
  • Metal mine underground filling cementing material as well as preparation method and application thereof
  • Metal mine underground filling cementing material as well as preparation method and application thereof

Examples

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preparation example Construction

[0054] The present invention also provides a method for preparing the cementitious material filled underground in metal mines, comprising the following steps:

[0055] Grinding granulated blast furnace slag to a specific surface area ≥ 420m 2 / Kg, to obtain granulated blast furnace slag powder, grind cement clinker, quicklime and desulfurized gypsum to a specific surface area ≥ 360m 2 / Kg, and then mix granulated blast furnace slag powder, cement clinker, quicklime, desulfurized gypsum, sodium carbonate and sodium sulfate to obtain the cementitious material for underground filling of metal mines.

[0056] In the present invention, the sources and amounts of the granulated blast furnace slag fine powder, cement clinker, quicklime, desulfurized gypsum, sodium carbonate and sodium sulfate are the same as those of the above-mentioned granulated blast furnace slag fine powder, cement clinker, quick lime, desulfurization The source and consumption of gypsum, sodium carbonate and so...

Embodiment 1

[0063] Weigh 75 parts of granulated blast furnace slag powder, 3.75 parts of cement clinker powder, 3.75 parts of quicklime powder, 15 parts of desulfurized gypsum powder, 1.25 parts of sodium carbonate, and 1.25 parts of sodium sulfate.

[0064] The granulated blast furnace slag is ground by ball mill or vertical mill until the specific surface area is ≥420m 2 / Kg, grind desulfurized gypsum, quicklime, and cement clinker through a ball mill or a vertical mill until the specific surface area is ≥360m 2 / Kg, sodium carbonate and sodium sulfate do not need to be treated; then add the above materials to the dry powder material mixer in turn and stir evenly.

Embodiment 2

[0066] According to the preparation method in Example 1, the difference is that the raw material ratio in Table 1 was used to prepare the gelled material.

[0067] Then, the cementitious material obtained by serial numbers 1 to 14 is mixed with water in a proportion of 1:6 with a lime-sand ratio (mass ratio of cementitious material to tailings) to form a filling material with a mass concentration of 72%, and a humidity ≥ 50%. The filling experiment was carried out at a temperature of 20±2°C, and the results are shown in Table 1.

[0068] Table 1 raw material ratio

[0069]

[0070] According to Table 1, the optimal formula is mineral powder 75% + cement clinker 3.75% + lime 3.75% + gypsum 15% + sodium carbonate 1.25% + sodium sulfate 1.25%.

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Abstract

The invention provides an underground filling cementing material for a metal mine. The underground filling cementing material is prepared from the following components in parts by weight: 70 to 80 parts of granulated blast furnace slag micro powder, 3.75 to 10 parts of cement clinker, 3.75 to 7.5 parts of quick lime, 10 to 20 parts of desulfurized gypsum, 1.25 to 2.5 parts of sodium carbonate and 1.25 to 2.5 parts of sodium sulfate. Polar molecules or ions generated after sodium carbonate, sodium sulfate and lime are dissolved in water are utilized to destroy structures such as silica tetrahedrons and alumina tetrahedrons of the slag, so that the slag is dispersed in a solvent, and then the slag generates gelling property under the co-excitation action of the lime, cement clinker and gypsum. The gelling agent can be well compatible with blast furnace slag powder and other materials in most regions of the country, and is convenient to use and high in capability of adjusting measures to local conditions. The invention further provides a preparation method and application of the metal mine underground filling cementing material.

Description

technical field [0001] The invention belongs to the technical field of inorganic gelling materials, and in particular relates to an underground filling gelling material for metal mines, a preparation method and application thereof. Background technique [0002] At present, most of the mines using the filling mining method at home and abroad use cement as the cementing material. As the price of cement continues to rise, the proportion of cementing materials in the filling cost is increasing; and the underground environment of metal mines is complex, and the goaf is prone to water accumulation and high humidity. With the continuous development of mineral processing technology, The particle size of the tailings is getting smaller and smaller; the early strength requirements of the filling body are high. Obviously, the traditional cementitious material cement can no longer meet the production needs, and it is urgent to find a new cementitious material to replace cement. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C04B7/19C04B7/17C04B7/36C04B28/08E21F15/00
CPCC04B7/1535C04B7/21C04B7/19C04B7/17C04B7/36C04B28/08E21F15/005C04B2111/00724C04B18/12Y02P40/10
Inventor 罗艳平黄士兵张修李良徐在泳
Owner FENY
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