Composite mineralizing agent suitable for white sulphoaluminate cement clinker calcination and preparation method thereof

Abstract

The invention relates to a composite mineralizing agent suitable for white sulphoaluminate cement clinker calcination, and belongs to the technical field of cement mineralizing agents. The composite mineralizing agent comprises, by weight, 0.2-1.0 part of CaF2, 0.1-1.5 parts of SrO, 0.1-1.0 part of ZnO and 0.1-1.0 part of MgO. According to the composite mineralizing agent, the cooperative action with other mineralizing agents under low CaF2 doping to reduce the clinker sintering temperature can be achieved, energy consumption is reduced, liquid phase amount is improved, high-temperature crystalline phase is stabilized, and the performance of the white sulphoaluminate cement is significantly improved; the mineralizing agent has the advantages that the obtaining of raw materials is easy, thecost is low, the preparation method is simple, the implementation of the method is easy, and the composite mineralizing agent is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of cement preparation, and in particular relates to a composite mineralizer capable of significantly improving the calcination of white sulphoaluminate cement clinker and a preparation method thereof. Background technique [0002] In today's society, the construction industry is booming, and the volume of traditional decorative building materials used is huge. At the same time, as the country pays more attention to infrastructure construction and society's attention to energy conservation, emission reduction and environmental protection, how to reduce energy consumption of building materials and improve product quality? performance is an urgent problem to be solved. Sulphoaluminate cement has many advantages such as early strength, high strength, low energy consumption, wear resistance, and excellent long-term mechanical properties. It is a special cement with good application prospects. By reducing the con...

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Problems solved by technology

The mineralizers used in cement clinker mainly include manganese dioxide, chromium-containing compounds, copper-containing compounds and chromium slag, etc. The main active ingredients of these mineralizers have a certain color, although they can promote The formation of cement clinker minerals reduces the calcination temperature and increases the liquid phase, but it has a great impact on the whiteness of cement and significantly reduces product performance

Some scholars also refer to CaF 2 It is used as a mineralizer in cement calcination. This mineralizer can reduce the viscosity of the liquid phase, promote the formation of dicalcium silicate and tricalcium aluminate, and reduce the firing temperature of clinker. The lining has a certain corrosion effect and has a certain pollution to the environment

[0004] In summary, there are still many problems in the existing white sulfoaluminate cement mineralizers. For example, single-component mineralizers often have both advantages and disadvantages, and cannot take into account both performance improvement and environmental protection. whiteness of salt cement, etc.; for this reason, it is necessary to study a new cement clinker mineralizer and make it suitable for white sulphoaluminate cement, in order to at least solve or improve the above-mentioned Some problems existing in the prior art

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