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Preparation method and application method of calcium sulphosilicate mineral

A technology of calcium sulfosilicate and minerals, which is applied in the field of preparation and application of calcium sulfosilicate minerals, can solve problems such as low content, and achieve the effects of simple preparation, improved final quality and good grindability

Inactive Publication Date: 2015-05-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, even if calcium sulfosilicate is contained in the sulfoaluminate cement prepared by the existing method, the content is very low, which is not enough to be used as an additional component
At the same time, there is no natural calcium sulfosilicate stone available for use in nature, so how to provide a preparation method for cement additives with calcium sulfosilicate as the main active ingredient, so as to improve the later strength of sulfoaluminate cement, has become an application people consider the direction of research

Method used

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  • Preparation method and application method of calcium sulphosilicate mineral
  • Preparation method and application method of calcium sulphosilicate mineral

Examples

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Effect test

Embodiment 1

[0039] A preparation method of calcium sulfosilicate mineral, the specific implementation steps and results are as follows: using analytically pure calcium carbonate (replacing limestone), dihydrate gypsum and silica fume (need to measure the SiO of silica fume 2 The content is greater than 80%, and the specific surface area is guaranteed to be greater than 600 m 2 / kg or more) according to the following mass ratio ingredients: 61 parts of analytically pure calcium carbonate, 15 parts of silica fume, 24 parts of dihydrate gypsum (and make it meet CaO:SiO 2 :SO 3 The mass ratio ranges from 7:3:2 to 7:3:2.8), and they are ground together to a fineness of 100 to 200 meshes, and then calcined at a high temperature of 1200 ° C in a high temperature furnace and kept for 4 hours, and then taken out and rapidly cooled in the air; Then it is ground by a ball mill until the specific surface area is 300-450 m 2 / kg to get cement additives.

[0040] The calcium sulfosilicate mixed mine...

Embodiment 2

[0042] A preparation method of calcium sulfosilicate mineral, the specific implementation steps and results are as follows: using analytically pure calcium carbonate (replacing limestone), natural gypsum and quartz powder (the SiO of quartz powder is measured 2 The content is greater than 80%, and the specific surface area is 1000 m2 / kg) according to the following mass proportioning: 61 parts of analytically pure calcium carbonate, 13 parts of quartz powder, 26 parts of natural gypsum (and make it meet CaO:SiO 2 :SO 3 The mass ratio ranges from 7:3:2 to 7:3:2.8), and they are ground together to a standard sieve fineness of 150 mesh, and then calcined at a high temperature of 1200°C in a high-temperature furnace and kept for 8 hours, and then taken out and rapidly cooled in the air; Then it is ground by a ball mill until the specific surface area is 300-450 m 2 / kg to get cement additives.

[0043] The cement additive synthesized in the above example 2 was subjected to X-ray ...

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Abstract

The invention discloses a preparation method of a calcium sulphosilicate mineral. The preparation method is characterized by comprising the steps of respectively finely grinding a calcium oxide raw material, a silicon oxide raw material and gypsum and uniformly mixing; calcining at a high temperature, maintaining the temperature for a period of time to obtain mixed mineral constituents mainly including calcium sulphosilicate; and grinding the mixture to a certain fineness so as to obtain the calcium sulphosilicate mineral. The invention further discloses an application method of the calcium sulphosilicate mineral. The application method is characterized in that the calcium sulphosilicate mineral is applied to a sulphate aluminum cement additive so as to increase the later strength of the sulphate aluminum cement. According to the application method, the later strength of the sulphate aluminum cement can be effectively improved, and the quality of a concrete structure of a final product is improved; meanwhile, the preparation method has the advantages that the preparation is simple, the implementation is convenient and the cost is low.

Description

technical field [0001] The invention relates to the technical field of cement additives; in particular, it relates to a preparation and application method of calcium sulfosilicate mineral. Background technique [0002] Sulphoaluminate cement has high early strength, excellent durability such as frost resistance, impermeability, and corrosion resistance. The shrinkage of the folding strength requires continuous improvement and perfection, and is the main point that those skilled in the art have been paying attention to and studying. At the same time, as a special cement, sulfoaluminate cement requires high quality raw materials. In order to overcome the above shortcomings, Belite sulfoaluminate cement and high-silica sulfoaluminate cement were introduced, but Belite sulfoaluminate cement is still The problem of the late shrinkage of the cement strength of this series of cements is not solved, especially the high alumina raw materials containing alumina such as bauxite need t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/24C04B22/14
Inventor 钱觉时陈晴沈燕孙化强余金城张健
Owner CHONGQING UNIV
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