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Foam cement coagulation accelerator for coal mines and preparation method of coagulation accelerator

A technology of foamed cement and coagulant, which is applied in the field of foamed cement coagulant and its preparation in coal mines. It can solve problems such as cracking, unstable foamed cement, and high resource consumption, and achieve enhanced stability and coagulation effects. Good, low alkali effect

Inactive Publication Date: 2014-08-06
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing coagulants are easily affected by the foaming agent in the slurry, and the setting time is unstable; and the heat generated during use will cause the foamed cement to be unstable and crack, which cannot meet the high stability of the foamed cement on site at the same time. and thermal insulation requirements
In addition, the existing coagulant has a large alkali content and consumes more resources

Method used

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  • Foam cement coagulation accelerator for coal mines and preparation method of coagulation accelerator
  • Foam cement coagulation accelerator for coal mines and preparation method of coagulation accelerator

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A foam cement coagulant for coal mines comprises the following raw materials in parts by weight: 34 kg of coal gangue, 37 kg of fly ash, 27 kg of limestone, and 2 kg of fluorite.

[0015] In the present embodiment, the preparation method of foamed cement coagulant for coal mine, the specific steps are:

[0016] First, grind the raw materials into spherical particles with a diameter of 10 mm, and mix them evenly; stir the mixture evenly with a water-cement ratio of 1:1.5, and use hydrothermal synthesis at 250°C and 1 atm for 5 hours to obtain a pretreated sample; finally The sample obtained after pretreatment was calcined at 900°C for 1.5h, and the calcined sample was ground to a specific surface area of ​​600m 2 / kg.

Embodiment 2

[0018] A foam cement coagulant for coal mines comprises the following raw materials in parts by weight: 37 kg of coal gangue, 36 kg of fly ash, 25 kg of limestone, and 2 kg of fluorite.

[0019] The preparation method of the foamed cement coagulant for coal mine in this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0021] A foam cement coagulant for coal mines comprises the following raw materials in parts by weight: 38 kg of coal gangue, 37 kg of fly ash, 23 kg of limestone, and 2 kg of fluorite.

[0022] The preparation method of the foamed cement coagulant for coal mine in this embodiment is the same as that in Embodiment 1.

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Abstract

The invention discloses a foam cement coagulation accelerator for coal mines. The foam cement coagulation accelerator comprises raw materials in parts by weight as follows: 30-51 parts of coal gangue, 25-38 parts of coal ash, 16-27 parts of limestone and 2-5 parts of fluorite. The preparation method of the coagulation accelerator comprises the steps as follows: (1), the raw materials are weighed proportionally, ground into spherical particles with diameters of 8 mm-12 mm and uniformly mixed; (2), the obtained mixture is uniformly stirred and mixed in a water cement ratio of 1: 1.5, and is treated with a hydrothermal synthesis method for 4-6 h under the conditions of 200-300 DEG C and 1 atm to obtain a pre-treatment product; and (3), the pre-treatment product is calcined at the temperature of 850-1,000 DEG C for 1-2 h, and a calcined product is ground until the specific surface area is in a range from 500 m<2> / kg to 700 m<2> / kg. The coagulation accelerator is good in coagulation acceleration effect, has low alkali content and saves resources.

Description

technical field [0001] The invention relates to a coagulation accelerator and a preparation method, in particular to a foam cement coagulation accelerator for coal mines and a preparation method. Background technique [0002] Foamed cement is a kind of porous foam material, because it has good fluidity in the fresh state, can be piled up, light weight after condensation, has a certain compressive strength and low thermal conductivity, it is widely used in insulation Thermal and thermal insulation engineering fields. At present, coal spontaneous combustion is one of the most important disasters faced by my country's coal mine safety production. Once a fire occurs, it will cause huge economic losses and casualties. In order to effectively prevent the spontaneous combustion of coal caused by air leakage in underground coal mines, foamed cement is often used for filling and filling in areas prone to spontaneous combustion (high temperature fire source points) such as coal mine ...

Claims

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Application Information

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IPC IPC(8): C04B22/12C04B103/12
Inventor 秦波涛鲁义史全林贾玉威李方磊
Owner CHINA UNIV OF MINING & TECH