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 bariumslag 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 calcined composite mineralizer with strontium as the main component and barium as a trace auxiliary component. Background technique [0002] The sintering of cement clinker is to use calcination equipment to heat the raw material, so that it undergoes a series of physical and chemical reactions to produce clinker. The physical and chemical reactions can be summarized into five processes: [0003] The first is drying and preheating, during which the moisture in the raw meal is evaporated and the main components in the clay undergo dehydration reactions. The second is the decomposition of carbonate (an important process of clinker firing). When the temperature of the raw meal rises to 850°C, a large amount of calcium carbonate is decomposed. The third is the solid-phase reaction. As the thermometer gradually rises to 1300°C, the solid substances r...

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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