Coal ash gangue filling activity-stimulating rubber solid material and preparation method thereof

A technology of active excitation and solidification, applied in the field of inorganic materials

Inactive Publication Date: 2012-08-22
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor considers to provide a kind of coal ash gangue filling active stimulating colloidal solid material and its preparation method, so that the coal ash gangue filling active stimulating colloidal solid material has the effect of stimulating activity on filling fly ash and spontaneous combustion gangue powder, and is suitable for pulverized coal Mixed filling of ash and crushed coal gangue to solve the problem of solidification strength and early setting and early strength of mixed filling of fly ash and coal gangue

Method used

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  • Coal ash gangue filling activity-stimulating rubber solid material and preparation method thereof
  • Coal ash gangue filling activity-stimulating rubber solid material and preparation method thereof
  • Coal ash gangue filling activity-stimulating rubber solid material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The ratio of cement-solid material: Surabaya clinker 45.0%, superfine slag powder 20.0%, lime 20%, magnesium chloride 2.0%, sodium sulfate 1.5%, anhydrite 11.5%.

[0046] Preparation process: Grind lime, anhydrite and Surabaya clinker according to the above-mentioned raw material ratio, then mix with superfine slag powder, powdered magnesium chloride and sodium sulfate, stir and homogenize to obtain cemented solid material, namely FAC2-1.

[0047] Slurry ratio: According to the ratio of ash to material (the ratio of cement-solid material to filler, the same below) 1:6.14, the concentration is 67% (the concentration is the ratio of the material to the total material and water. The material includes cement-solid material and crushed stone, Fly ash, etc.), add water and mix the fly ash and cement material in the mixing tank evenly, then inject the 7.07×7.07×7.07cm standard test mold, and put it into the standard concrete curing box for curing. Continue curing after demolding, a...

Embodiment 2

[0051] The ratio of cement-solid material: Surabaya clinker 49.0%, superfine slag powder 23.0%, lime 15.0%, magnesium chloride 3.0%, sodium sulfate 2.0%, anhydrite 8.0%.

[0052] Preparation process: Grind lime, anhydrite, and Surabaya clinker together according to the above-mentioned raw material ratio, then mix with superfine slag powder, powdered magnesium chloride and sodium sulfate, stir and homogenize to obtain a cemented solid material, namely FAC2-2.

[0053] Slurry ratio: take the ratio of ash to material ratio of 1:5.8, concentration 66%, add water and mix the fly ash and cement material in the mixing tank evenly, and then inject the standard test mold of 7.07×7.07×7.07cm into the standard concrete Conservation box maintenance. Continue curing after demolding, and perform pressure test at the specified time. Among them, the fly ash is grade III coarse-grained fly ash of Shihong Power Plant, with an average particle size of 33.9μm and a specific surface area of ​​3186.1 (...

Embodiment 3

[0057] Cement-solid ratio: Laiwu Steel's cement clinker 24.0%, Surabaya cement clinker 10.0%, calcium magnesium powder 32.0%, fluorogypsum 12.5%, slag fine powder 20.0%, magnesium chloride 1.5%. The MgO content of the calcium magnesium powder is 30.1%, and the CaO content is 50.4%.

[0058] Preparation process: Calcium magnesium powder, fluorogypsum and clinker are ground together according to the above-mentioned raw material ratio, and then mixed with superfine slag powder and powdered magnesium chloride materials, stirred and homogenized to obtain a cemented material, namely FAC1.

[0059] Slurry ratio: Take the ratio of crushed stone to fly ash at 1:1, ash material ratio at 1:6.7, concentration 60%, add fly ash, broken coal gangue and cementitious material in a mixing tank and stir evenly. The mass ratio of the fly ash to the broken coal gangue is 1:1, and then a standard test model of 7.07×7.07×7.07 cm is injected and put into a standard concrete curing box for curing. Continu...

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Abstract

The invention discloses a coal ash gangue filling activity-stimulating rubber solid material which comprises the following components in parts by weight: 34-60 parts of base material, 15-45 parts of calcium source compound, 7-21 parts of gypsum, 10-42 parts of slag fine powder and 1.5-10 parts of stimulating material, wherein the base material is cement clinker or cement; the calcium source compound is calcined lime and/or calcium magnesium powder; and the stimulating material is chloride and/or sulfate. As Ca(OH)2 is key material for generating hydrated silicate and hydrated aluminum silicate, the coal ash gangue filling activity-stimulating rubber solid material takes the chloride and/or the sulfate as the stimulating material, so that the dissolution of Ca(OH)2 generated by the base material, the calcined lime or the calcium magnesium powder can be promoted, the alkalinity of solution can be improved, the covalent bond of SiO4<4-> in the coal ash can be opened, so that the depolymerization of silica tetrahedron can be promoted, the activity stimulation of the coal ash and the gangue powder can be accelerated, early solidifying and early strengthening when the coarse coal ash and the gangue powder are filled with each other in a mixing way can be realized, and the later strengthening intensity can be improved.

Description

Technical field [0001] The invention relates to the technical field of inorganic materials, and more specifically, to a coal ash gangue filling activity stimulating cement solid material and a preparation method thereof. Background technique [0002] In the process of nonferrous metal and precious metal ore mining at home and abroad, the filling mining method has been widely used, and the superiority of filling technology has been increasingly recognized and accepted by people. With the development of mining engineering and the continuous increase of mining depth, issues such as ground pressure, ore loss and dilution, mine environmental protection and mine economic benefits have also received more and more attention. At present, as a commonly used underground filling material, tailings of metal mines are the main source of inert aggregates for filling, and have the function of filling goafs. Existing technologies have extensively reported on metal mine cement solid materials and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B22/14C04B22/12
Inventor 王谦源杨震王宁曹秋华马池艳
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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