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A kind of underground filling cementitious material and its preparation method and application

A technology for cementitious material and slurry, which is applied in the field of cementitious material and its preparation, can solve the problems of steel slag occupying land, polluting the environment, and steel slag cannot be disposed of in time, and achieves the effects of improving fluidity, simple preparation process, and promoting pozzolanic effect.

Active Publication Date: 2022-04-29
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current situation of comprehensive utilization of steel slag in my country is far from this plan, especially the utilization rate of converter steel slag known as "inferior cement clinker" is only 10% to 20%.
The steel slag produced by domestic iron and steel enterprises cannot be disposed of in time, resulting in a large amount of steel slag occupying land and polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method for underground filling cementitious material, comprising the following steps:

[0032] (1) Send 40 parts by weight of sodium calcium silicate waste glass, 30 parts of slag and 20 parts of steel slag into a ball mill to be crushed until the average particle size is 10 mm, and mix evenly to obtain a solid mixture;

[0033] (2) Send the solid mixture obtained in step (1) into a wet mill, and add water, the weight ratio of water to solid mixture is 0.5, then add 2 parts of water reducing agent for wet grinding, and the wet grinding time is 2h, the rotational speed of the wet mill is 40r / s, the diameter of the grinding balls in the wet mill is 2mm, and the composition of the grinding balls is either or both of zirconia and alumina. Ball milling until the average particle size of the slurry is 3.6 μm to obtain a liquid slurry;

[0034] (3) Pour the liquid slurry obtained in step (2) into the stirring pot, and add water, the weight ratio of water and liq...

Embodiment 2

[0038] A preparation method for underground filling cementitious material, comprising the following steps:

[0039] (1) Send 48 parts of sodium calcium silicate waste glass, 32 parts of slag and 12 parts of steel slag into a ball mill to be crushed to an average particle size of 10 mm in parts by weight, and mix evenly to obtain a solid mixture;

[0040] (2) Send the solid mixture obtained in step (1) into a wet mill, and add water, the weight ratio of water to solid mixture is 0.5, then add 1.8 parts of water reducing agent for wet grinding, and the wet grinding time is 2h, the rotational speed of the wet mill is 40 / s, the diameter of the grinding balls in the wet mill is 2mm, and the composition of the grinding balls is either or both of zirconia and alumina. Ball milling until the average particle size of the slurry is 3.6 μm to obtain a liquid slurry;

[0041] (3) Pour the liquid slurry obtained in step (2) into the stirring pot, and add water, the weight ratio of water a...

Embodiment 3

[0045] A preparation method for underground filling cementitious material, comprising the following steps:

[0046] (1) Send 56 parts of sodium calcium silicate waste glass, 34 parts of slag and 14 parts of steel slag into a ball mill to be crushed to an average particle size of 10 mm in parts by weight, and mix evenly to obtain a solid mixture;

[0047] (2) Send the solid mixture obtained in step (1) into a wet mill, and add water, the weight ratio of water to solid mixture is 0.5, then add 1.6 parts of water reducing agent for wet grinding, and the wet grinding time is 2h, the rotational speed of the wet mill is 40 / s, the diameter of the grinding balls in the wet mill is 2mm, and the composition of the grinding balls is either or both of zirconia and alumina. Ball milling until the average particle size of the slurry is 3.6 μm to obtain a liquid slurry;

[0048] (3) Pour the liquid slurry obtained in step (2) into the stirring pot, and add water, the weight ratio of water a...

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Abstract

A preparation method for underground filling cementitious material, characterized in that it comprises the following steps: crushing 40-70 parts of waste glass, 30-40 parts of slag and 10-20 parts of steel slag to an average particle size of 1-15 mm, and mixing uniformly , to obtain a solid mixture; water is added to the solid mixture, the weight ratio of water to the solid mixture is 0.4-0.6, and then 1-2 parts of water reducing agent are added for wet grinding, and the average particle size of the ball mill until the slurry is 1 ‑5 μm to obtain a liquid slurry; add water to the liquid slurry, the weight ratio of water to liquid slurry is 0.5, then add 3‑8 parts of activator, mix and stir evenly, and vibrate completely to obtain underground filling cementitious material . The invention utilizes the characteristic that the slurry is alkaline after wet grinding, and the glass in the mixed slurry excites the slag while completing the self-excitation, fully utilizes the solid waste, improves the utilization rate of the solid waste, reduces the preparation cost, and is energy-saving and environment-friendly. The multifunctional, economical and efficient underground filling cementitious material is prepared, the preparation process is simple, and the cement mortar can be gradually replaced and widely used.

Description

technical field [0001] The invention relates to a cementitious material and a preparation method thereof, in particular to an underground filling cementitious material and a preparation method and application thereof. Background technique [0002] At present, mine filling mainly includes dry, hydraulic, cementing and other filling methods. Among them, cemented filling is to use waste aggregates such as mineral processing tailings and waste rocks mixed with an appropriate amount of cementitious materials to form a filling body with a certain strength and integrity, which is suitable for The mining of high-grade rich ore, ore bodies with unstable ore rocks and "three lower ore bodies" is a filling process that cannot be replaced by dry and hydraulic filling processes. However, the main cementitious material used in this filling method is cement, so there are problems such as large dosage, high cost, and poor high-concentration transport performance. Cementitious material, als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08
CPCC04B28/082C04B2111/00663C04B2111/00724C04B2201/50C04B18/141C04B14/22C04B2103/302
Inventor 王迎斌熊光贺行洋苏英王文娜李欣懋李阳李齐刘文志苏骏
Owner HUBEI UNIV OF TECH
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