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Milltailing multivariate composite mine filling cementing agent

A multi-component composite and mine filling technology, applied in cement production and other directions, can solve the problems of destroying the uniformity of the filling body, slow the setting of the filling body, reducing the overall strength, etc. Effect

Inactive Publication Date: 2013-06-26
杨春保 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Segregation causes the filling body to appear a weak layer with slow coagulation and poor strength, which destroys the uniformity of the filling body and reduces its overall strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw material ratio: iron ore tailings 25%, water slag 32%, clinker 25%, fly ash 10%, dihydrate gypsum 5%, admixture 3%.

[0025] The raw materials are mixed and ground with a high-yield high-fineness ball mill, and the specific surface area of ​​the milled material is tested to be 457㎡ / ㎏.

[0026] The strength test results are as follows:

[0027] Standard sand strength (the test method adopts the national standard GB175-2007):

[0028] 3 days: 14.06MPa 28 days: 37.35MPa

[0029] Lime-sand ratio concentration% 3 days strength 28 days strength 1:6 75% 0.64 2.48

[0030] Lime-sand ratio concentration% Slump cm 1:6 70% 28.5

Embodiment 2

[0032] Raw material ratio: copper ore tailings 28%, water slag 32%, clinker 21%, fly ash 10%, desulfurization gypsum 6%, admixture 3%.

[0033] The raw materials are mixed and ground with a high-yield high-fineness ball mill, and the specific surface area of ​​the milled material is tested to be 473㎡ / ㎏.

[0034] The strength test results are as follows:

[0035] Standard sand strength (the test method adopts the national standard GB175-2007):

[0036] 3 days: 14.56MPa 28 days: 37.18MPa

[0037] Lime-sand ratio concentration% 3 days strength 28 days strength 1:6 75% 0.7 2.60

[0038] Lime-sand ratio concentration% Slump cm 1:6 70% 28.1

Embodiment 3

[0040] Raw material ratio: gold ore tailings 35%, water slag 35%, clinker 5%, fly ash 15%, anhydrite 6.5%, admixture 3.5%.

[0041] The raw materials are mixed and ground with a high-yield high-fineness ball mill, and the specific surface area of ​​the milled material is tested to be 461㎡ / ㎏.

[0042] The strength test results are as follows:

[0043] Standard sand strength (test method adopts GB175-2007):

[0044] 3 days: 14.50MPa 28 days: 36.20MPa

[0045] Lime-sand ratio concentration% 3 days strength 28 days strength 1:6 75% 0.7 2.66

[0046] Lime-sand ratio concentration% Slump cm 1:6 70% 28.8

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Abstract

The invention discloses a milltailing multivariate composite mine filling cementing agent, comprising the following raw materials by weight percent: 25-45% of milltailings, 10-35% of grain slag, 5-30% of clinker, 0-20% of coal ash, 5-7% of gypsum and 2-4% of admixture. The milltailing multivariate composite mine filling cementing agent is used for mine filling and has the advantages that filling cost is low, strength is high, the quality of a filling body is good, segregation resistance rate and anti-expansion rate are low, construction can be carried out favorably, milltailing utilization rate of the filling body is high, and the effects of energy saving and waste recycling are achieved.

Description

Technical field: [0001] The invention relates to a mine filling cementing agent, in particular to a tailings-based multi-element composite mine filling cementing agent, which is widely used in the field of mine filling engineering. Background technique [0002] In the underground mining process of ore deposits, on the one hand, a large number of goafs will inevitably be produced, and on the other hand, due to the low grade of ore, a large amount of waste must be discharged, mainly the tailings of the ore dressing plant and the waste rock of the excavation. The large accumulation of gobs has the possibility of large-scale ground pressure activities, which seriously threatens the safety of the mine itself and will cause damage to the surface of the mining area. A large amount of tailings piled up on the surface not only occupies farmland and cultivated land, but also seriously damages the surrounding environment. Therefore, while developing and utilizing ore, how to protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 杨春保陈贤树朱春启成建
Owner 杨春保