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Slag-based whole tailing gravity-flow filling cementing material and filling slurry preparation method thereof

A technology of cementing materials and filling slurry, which is applied in the direction of cement production, etc., can solve the problems of poor stability and high cost, and achieve the effects of improving early strength, increasing roof connection rate, and shortening setting time

Inactive Publication Date: 2014-06-04
山东黄金矿业(莱州)有限公司焦家金矿
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  • Application Information

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Problems solved by technology

[0007] The Chinese patent with the publication number CN101786854A discloses the preparation and application method of an early-strength mine tailings cementing material for tailings backfill. As the main component of cementing material, salt cement has poor stability and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1： preparation example 1

[0025] 69.97 parts of blast furnace slag, 15 parts of Portland cement clinker, 9 parts of hemihydrate gypsum (ie construction gypsum), 3 parts of dihydrate gypsum, 3 parts of quicklime with CaO content > 80%, 0.03% part of triethanolamine.

[0026] Mix the raw materials evenly according to the above ratio, put them into a ball mill, grind for 60 minutes, and measure its specific surface area to be 433m 2 / kg.

[0027] Finally, pack the ground cement material and keep it sealed.

Embodiment 2： preparation example 2

[0029] 59.96 parts of blast furnace slag, 15 parts of Portland cement clinker, 5 parts of hemihydrate gypsum (ie construction gypsum), 10 parts of dihydrate gypsum, 10 parts of quicklime with CaO content > 80%, 0.04% part of triethanolamine.

[0030] Mix the raw materials evenly according to the above ratio, put them into a ball mill, grind for 50 minutes, and measure its specific surface area to be 425m 2 / kg.

[0031] Finally, pack the ground cement material and keep it sealed.

Embodiment 3

[0032] Example 3: Preparation example 3 of self-flowing filling cementing material with full tailings

[0033] 78.95 parts of blast furnace slag, 5 parts of Portland cement clinker, 6 parts of hemihydrate gypsum (ie construction gypsum), 5 parts of dihydrate gypsum, 5 parts of quicklime with CaO content > 80%, 0.05% part of triethanolamine.

[0034] Mix the raw materials evenly according to the above ratio, put them into a ball mill, grind for 30 minutes, and measure the specific surface area to be 407m 2 / kg.

[0035] Finally, pack the ground cement material and keep it sealed.

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Abstract

The invention relates to a slag-based whole tailing gravity-flow filling cementing material and a filling slurry preparation method thereof. Blast furnace slag is used as a main cementing material, and water glass is used as a slag exciting agent, thereby significantly improving the early-stage strength. According to the invention, hemihydrate gypsum is also added, which shortens the cementing time; quicklime is added to realize volume expansion of the slurry after cementation is started, and thus to improve the tight-filling rate of the filling material. Since the solid concentration is increased, the rheological property of the filling material is reduced; the addition of a powdery water reducer can improve the fluidity and reduce the bleeding rate with the proviso that the solid concentration of the filling slurry is maintained to be high, thus the filling slurry is more uniform and gravity-flow filling is realized. With the addition of the high-efficient water reducer and the cooperative use of citric acid and glucose retarders, the pipe blocking phenomenon caused by fluidity loss during whole tailing filling is improved.

Description

technical field [0001] The invention relates to a full tailings self-flowing cemented filling material with blast furnace slag as the main raw material. The invention also relates to the preparation process of the full tailings self-flowing cemented filling material. technical background [0002] The filling mining method is an important method for the safe and efficient production of underground mines. It can not only control underground mined-out areas, avoid surface subsidence and safety hazards caused by mined-out areas, but also improve the recovery rate and make extensive use of mine waste such as tailings. Mitigate the adverse impact of mine waste on the environment. [0003] Full tailings cemented filling is a cemented filling composed of non-graded and non-desilting full-size tailings as the filling base material, and cement or other cementitious materials as the cementing agent. Full tailings cemented filling refers to the filling method in which tailings are not...

Claims

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Application Information

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IPC IPC(8): C04B7/21C04B28/14
CPCY02P40/10
Inventor 范作鹏刘再涛张忠辉任少峰陈桢宇王学斌陈克聚杨勇邱俊刚张海涛商继红
Owner 山东黄金矿业(莱州)有限公司焦家金矿
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