Strontium-barium cement calcination composite mineralizer

Abstract

The invention relates to a strontium-barium cement calcination composite mineralizer, which is mainly made of strontium slag and barium slag, wherein both the weight percentage of the strontium slag and the weight percentage of the barium slag are 15 to 85 percent; the strontium slag is waste residue for producing strontium carbonate, and the weight percentage of SrO is required to be 25 to 40 percent; and the barium slag is waste residue for producing barium carbonate, and the weight percentage of BaO is required to be 20 to 50 percent. The invention utilizes the strontium slag and the barium slag as raw materials to synthesize the composite mineralizer, and achieves the aims of improving the cement strength, accelerating the hydrating and hardening of cement, improving the yield of kilns, reducing the cement cost, saving energy and resources, and reducing environmental pollution through the activation and mineralization of the composite mineralizer during the calcination of cement clinker.

Description

Technical field [0001] The invention relates to a mineralizer used in the production of Portland cement, in particular to a cement calcining composite mineralizer with strontium as the main component and barium as a minor auxiliary component. Background technique [0002] The achievement of cement clinker burning is to use calcining equipment to heat the raw material to cause a series of physical and chemical reactions to produce the mature material. The physical and chemical reactions can be summarized into five processes: [0003] One is drying and preheating. In this stage, the water in the raw meal is evaporated and the main components in the clay undergo dehydration reaction. The second is the decomposition of carbonate (an important process of clinker burning). When the temperature of raw meal rises to 850°C, calcium carbonate is decomposed in a large amount. The third is the solid phase reaction. As the thermometer gradually rises to 1300℃, the solid materials react with e...

AI Technical Summary

Problems solved by technology

[0010] Due to the small reserves of fluorite, it is easy to cause environmental pollution and corrosion of production equipment during calcination. Therefore, it is necessary to develop new mineralizers to achieve the purpose of improving product quality, saving energy, reducing production costs, and protecting the environment.

[0011] Strontium slag and barium slag are a kind of gray powdery industrial solid waste produced by the production of strontium carbonate and barium carbonate respectively. The storage of waste slag occupies a large amount of farmland and cannot be processed after solidification, which seriously affects the surrounding environment and pollutes nearby water sources.

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