Inorganic composite cementing material specialized for coal mine filling, and preparation method thereof

An inorganic composite and cementitious material technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of increasing equipment and labor costs, not being properly solved, and unfavorable popularization and application, etc. The effect of reducing coal mine filling cost, reducing labor cost and increasing mining output

Active Publication Date: 2014-02-05
SHANDONG MASS ENERGY OF NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coagulation speed of the colloidal solid powder in the prior art is relatively fast, and pipe plugging or waste pipes are prone to occur in long-distance transportation, especially in paste or semi-paste filling, which increases equipment and labor costs and wastes resources. The

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Embodiment 1: an inorganic composite cementitious material specially used for coal mine filling, which comprises six components in at least nine components, and the nine components have:

[0016] Component 1: 3 to 10 parts of sulphoaluminate cement or 1 to 8 parts of sulphoaluminate cement clinker, ferroaluminate cement clinker, fluoroaluminate cement clinker and high aluminate cement clinker one or a mixture of them mixed in any proportion;

[0017] Component 2: 20-35 parts of ordinary Portland cement or 15-30 parts of Portland cement clinker;

[0018] Component 3: 27.4-69.6 parts of blast furnace slag fine powder (specific surface area is 380m2 / g-420m2 / g);

[0019] Component 4: 20 to 40 parts of fly ash (national standard one or two);

[0020] Component 5: 6-15 parts of industrial waste gypsum;

[0021] Component 6: 6.1 to 12.7 parts of one of carbide slag, lime or hydrated lime or a mixture of them mixed in any proportion;

[0022] Component 7: 1-8 parts of sodiu...

Example Embodiment

[0031] Embodiment 2: An inorganic composite cementitious material specially used for coal mine filling, which is composed of the following raw materials in parts by weight: 3 parts of composite Portland cement, 20 parts of ordinary Portland cement, 27.4 parts of blast furnace slag micropowder, 6 parts 1 part of industrial waste gypsum, 6.1 parts of carbide slag, 20 parts of fly ash, 1 part of additive, 0.1 part of citric acid, and 0.5 part of activator.

[0032] The preparation method of the inorganic composite cementitious material specially used for coal mine filling in Example 2 of the present invention comprises the following steps: a, first 3 parts of composite Portland cement, 20 parts of ordinary Portland cement, 27.4 parts of blast furnace slag micropowder, 6 parts Industrial waste gypsum, 6.1 parts of carbide slag, 20 parts of fly ash, 1 part of additive, 0.1 part of citric acid and 0.5 part of activator are fully dried with a dryer; b, and then the dried raw materials...

Example Embodiment

[0033] Embodiment 3: An inorganic composite cementitious material specially used for coal mine filling, which is composed of the following raw materials in parts by weight: 6 parts of composite Portland cement, 26 parts of Portland cement, 40 parts of blast furnace slag micropowder, 10 parts Industrial waste gypsum, 9 parts of carbide slag, 25 parts of fly ash, 2 parts of additives, 0.5 parts of citric acid, and 0.5 parts of activator. The preparation method of the inorganic composite cement powder specially used for coal mine filling in this embodiment is basically the same as that in Embodiment 1 and Embodiment 2.

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Abstract

The invention discloses an inorganic composite cementing material specialized for coal mine filling, and a preparation method thereof. The inorganic composite cementing material is composed of the following raw materials: compound Portland cement or cement clinker, ordinary Portland cement, blast furnace slag micropowder, industrial waste gypsum, carbide slag, fly ash, an additive, citric acid and an excitant. The preparation method comprises the steps of drying all raw materials by a dryer; conveying the dried raw materials into a ball mill for milling; storing the dried raw materials in a raw material bin; conveying various raw materials to a mixer by a conveying melt; mixing uniformly; and then storing the mixture in a finished product warehouse. A filling paste provided by the invention can not be solidified or can be slightly solidified in 4 h and a slump degree is higher than 230 mm, can provide enough time for maintenance of filling equipment, prevents phenomena of tube plugging and waste tube caused by a long distance conveying pipe, can guarantee that mining work can be continuously carried out without mining column after demolding in 8 hours, increases mining output, increases resource mining rate, saves labor cost and increases production efficiency.

Description

technical field [0001] The invention belongs to the technical field of inorganic cementitious material for coal mine paste filling, and specifically relates to an inorganic cementitious material specially used for underground coal mine filling with coal gangue as aggregate and a preparation method thereof. Background technique [0002] In the prior art, coal mine filling cementitious materials are divided into two categories: inorganic and organic. Among them, the cost of organic materials is quite high and cannot be widely used in actual production; there are generally three types of inorganic materials, namely ordinary cement, cement powder, high Water quick setting material. The three materials have their own advantages and disadvantages. Among them, the cement powder has outstanding advantages as the bonding material for coal gangue powder underground filling. The cement powder is a brand-new inorganic composite material for full water cemented filling, which can be wi...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/14
CPCY02W30/91
Inventor 杨光君
Owner SHANDONG MASS ENERGY OF NEW MATERIAL
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