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Cemented filling material for mines as well as preparation method and application thereof

A technology for cementing filling materials and mines, which is applied to fillings, mining equipment, earthwork drilling and mining, etc. It can solve problems such as poor filling effect, poor mechanical properties, and subsidence, and achieve reduced slump, strong acid resistance, and good cementation performance Effect

Active Publication Date: 2021-12-07
北科蕴宏环保科技(北京)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing cemented filling materials generally have defects such as poor mechanical properties, which lead to problems such as collapse after filling, and the filling effect is extremely poor

Method used

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  • Cemented filling material for mines as well as preparation method and application thereof
  • Cemented filling material for mines as well as preparation method and application thereof
  • Cemented filling material for mines as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A cemented filling material for mines, comprising the following raw materials in parts by mass: 11 parts of desulfurized gypsum, 11 parts of hematite, 100 parts of gangue, 6 parts of fly ash, 26 parts of slag, 16 parts of copper-containing waste, and 1.5 parts of water reducer , 50 parts of water. Wherein, the molar ratio of the iron oxide in the hematite to the metallic copper in the copper-containing waste is 1:0.5.

[0034] Preparation:

[0035] 1) Weigh the raw materials according to the above parts by mass;

[0036] 2) Mix hematite with copper-containing waste, calcinate at a temperature of 780° C. for 4 hours, and pulverize to obtain a mixture powder;

[0037] 3) Mix desulfurization gypsum, slag, fly ash, and water reducer to obtain a mixed powder, then add gangue and the mixture, add water, mix evenly, dry, and pulverize to obtain cemented filling materials for mines.

Embodiment 2

[0039] A cemented filling material for mines, comprising the following raw materials in parts by mass: 15 parts of desulfurized gypsum, 15 parts of hematite, 120 parts of gangue, 8 parts of fly ash, 24 parts of slag, 14 parts of copper-containing waste, and 2 parts of water reducer , 60 parts of water. Wherein, the molar ratio of the iron oxide in the hematite to the metallic copper in the copper-containing waste is 1:0.4.

[0040] Preparation:

[0041] 1) Weigh the raw materials according to the above parts by mass;

[0042] 2) mixing hematite with copper-containing waste, calcining for 3 hours at a temperature of 800° C., and pulverizing to obtain a mixture powder;

[0043] 3) Mix desulfurization gypsum, slag, fly ash, and water reducing agent to obtain a mixed powder, then add gangue and the mixture, add water and mix evenly, let stand for 12 hours, dry, and crush to obtain cemented filling materials for mines.

Embodiment 3

[0045] A cemented filling material for mines, comprising the following raw materials in parts by mass: 8 parts of desulfurized gypsum, 6 parts of hematite, 80 parts of gangue, 3 parts of fly ash, 28 parts of slag, 18 parts of copper-containing waste, and 1 part of water reducer , 40 parts of water. Wherein, the molar ratio of the iron oxide in the hematite to the metallic copper in the copper-containing waste is 1:0.6.

[0046] Preparation:

[0047] 1) Weigh the raw materials according to the above parts by mass;

[0048] 2) mixing hematite with copper-containing waste, calcining at a temperature of 750° C. for 5 hours, and pulverizing to obtain a mixture powder;

[0049] 3) Mix desulfurization gypsum, slag, fly ash, and water reducer to obtain a mixed powder, then add gangue and the mixture, add water, mix evenly, dry, and pulverize to obtain cemented filling materials for mines.

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Abstract

The invention discloses a cemented filling material for mines as well as a preparation method and application thereof, and belongs to the technical field of cemented filling materials. The cemented filling material comprises the following raw materials in parts by mass: 8-15 parts of desulfurized gypsum, 6-15 parts of hematite, 80-120 parts of gangue, 3-8 parts of fly ash, 24-28 parts of slag, 14-18 parts of copper-containing waste, 1-2 parts of a water reducing agent and 40-60 parts of water. The hematite and the copper-containing waste are subjected to calcination treatment and then mixed with the remaining raw materials, and the cemented filling material for the mine is obtained. According to the method, the toxic heavy metal copper does not re-seep while the copper-containing waste is reutilized, and other raw materials are used so as to effectively improve the mechanical property of the mine cemented filling material.

Description

technical field [0001] The invention belongs to the technical field of cemented filling materials, and in particular relates to a cemented filling material for mines, a preparation method and application thereof. Background technique [0002] Hazardous waste refers to waste that has various toxicity, corrosiveness, flammability, explosiveness, reactivity and infectivity, and will pose serious hazards to the ecological environment and human health. If it is not properly handled, stored, transported, treated and disposed of , will pose a serious threat to human health and even regional environmental security. With the continuous development of industrial society, hazardous waste pollution incidents occur frequently, which has seriously restricted the sustainable development of social economy. Hazardous waste can affect the environment as well as human health if not handled properly. [0003] With the rapid development of the economy and the continuous expansion of industrial...

Claims

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Application Information

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IPC IPC(8): C04B28/14E21F15/00
CPCC04B28/144E21F15/005C04B2111/00724C04B2201/50C04B18/12C04B18/08C04B18/141C04B18/144C04B24/16
Inventor 张宁黄晓燕张静文
Owner 北科蕴宏环保科技(北京)有限公司
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