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Preparation method of tailings paste filling material

A technology of paste filling and tailings, which is applied in the field of filling materials, can solve the problems of poor adjustability of filling materials and lack of proportioning, and achieve the effects of abundant reserves, low production equipment and power consumption, and wide distribution

Inactive Publication Date: 2019-05-10
雷江容
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention: Aiming at the problems of poor adjustability and lack of scientific ratio of existing filling materials, a preparation method of tailings paste filling material is provided

Method used

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  • Preparation method of tailings paste filling material

Examples

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Effect test

example 1

[0035] Put the tailing sand and mineral admixture in the cement mortar mixer, and stir at 200r / min at room temperature for 5 minutes to obtain the mixture; add the cement, aliphatic high-efficiency water reducer, and tap water to the mixture, and Stir at a low speed of 200r / min for 1min, then stir at a high speed of 600r / min for 3min, and let stand for 2min to obtain the tailings paste filling material. Tailings, cement, mineral admixture, aliphatic high-efficiency water reducer, and tap water have 100 parts by weight of tailings, 40 parts of cement, 50 parts of mineral admixture, 0.5 part of aliphatic high-efficiency water reducer, 60 servings of tap water. The specific preparation steps of the mineral admixture are as follows: put fly ash and silicon powder in a mixer at room temperature and stir for 2 hours at a speed of 100r / min to obtain mineral powder; mix hydroxypropyl methylcellulose, carboxymethylcellulose Add it to the mineral powder, and stir at 150r / min for 1.5h a...

example 2

[0037] Put the tailings and mineral admixture in the cement mortar mixer, and stir at 250r / min for 8 minutes at room temperature to obtain the mixture; add the cement, aliphatic high-efficiency water reducer, and tap water to the mixture, and Stir at a low speed of 250r / min for 1min, then stir at a high speed of 700r / min for 4min, and let stand for 3min to obtain the tailings paste filling material. The parts by weight of tailings, cement, mineral admixture, aliphatic high-efficiency water reducer, and tap water are 110 parts of tailings, 45 parts of cement, 55 parts of mineral admixture, 1.0 part of aliphatic high-efficiency water reducer, 70 servings of tap water. The specific preparation steps of the mineral admixture are: put fly ash and silicon powder in a mixer at room temperature and stir for 2 hours at a speed of 125r / min to obtain mineral powder; mix hydroxypropyl methylcellulose, carboxymethylcellulose Add it to the mineral powder and stir at 175r / min for 1.8h at ro...

example 3

[0039] Put the tailing sand and mineral admixture in the cement mortar mixer, and stir at 300r / min for 10 minutes at room temperature to obtain the mixture; add the cement, aliphatic high-efficiency water reducer, and tap water to the mixture, and Stir at a low speed of 300r / min for 2 minutes, then stir at a high speed of 800r / min for 5 minutes, and let stand for 4 minutes to obtain the tailings paste filling material. Tailings, cement, mineral admixture, aliphatic high-efficiency water reducer, and tap water have 120 parts by weight of tailings, 50 parts of cement, 60 parts of mineral admixture, 1.5 parts of aliphatic high-efficiency water reducer, 80 servings of tap water. The specific preparation steps of the mineral admixture are: put fly ash and silicon powder in a mixer at room temperature and stir for 3 hours at a speed of 150r / min to obtain mineral powder; mix hydroxypropyl methylcellulose, carboxymethylcellulose Add it to the mineral powder, and stir at 200r / min for ...

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Abstract

The invention relates to a preparation method of a tailings paste filling material and belongs to the technical field of filling materials. The tailings paste filling material is prepared by adding limestone powder; the limestone powder which has good filling effect enables the paste structure to be compacted, so that pore size distribution is improved, and compressive strength of concrete is improved; the limestone power features low water adsorption; compared with fly ash, mineral residue and other active mineral mixtures, the limestone powder can evidently improve pumpability of concrete under same mixing amount. The mineral residue powder is added to prepare the tailings paste filling material; the mineral residue powder is an industrial byproduct made by treating a melt formed at 1350-1450 DEG C during mineral extraction, and is a high-quality concrete admixture; the mineral residue powder has high potential activity, helps improve late strength of a mix, has high activity, and can partly replace cement, reduce hydration heat, inhibit alkali-aggregate reaction and improve durability of concrete.

Description

technical field [0001] The invention relates to a method for preparing a tailings paste filling material, and belongs to the technical field of filling materials. Background technique [0002] The main environmental problems caused by coal mining and utilization are divided into three aspects: (1) The destruction and occupation of land resources: coal mining damages land resources, underground mining causes surface subsidence and gangue occupation; (2) The impact on water resources Destruction and pollution: natural drainage of coal-measure aquifers caused by water-conducting fissures caused by coal mining, and artificial drainage and drainage will cause damage and pollution to groundwater resources; (3) Pollution to the atmospheric environment: overflow of coal mine gas and coal gangue spontaneous combustion. [0003] Due to long-term large-scale high-intensity mining, ground subsidence disasters are serious in many mining areas, and groundwater levels in some areas have a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 雷江容
Owner 雷江容
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