Calcium aluminate powder with high dissolution rate

Abstract

The invention relates to calcium aluminate powder with high dissolution rate. The calcium aluminate powder comprises components in percentage by weight as follows: 55%-60% of bauxite, 5%-10% of boron oxide and 30%-40% of limestone, and the sum of the components is 100%. The process for preparing the calcium aluminate powder from the components comprises the following steps: the components are weighed, ground into powder and mixed uniformly; the uniformly mixed material is stirred and mixed with warm water at 30-35 DEG C in the weight ratio of the mixed material to the warm water being 1:1.5, a product is placed into a furnace for calcination with gas as fuel at the temperature of 1,050-1,100 DEG C, and granular calcium aluminate is obtained after retention for 30 min; granular calcium aluminate is ground by a mill, and the calcium aluminate powder with high dissolution rate is obtained. The conventional raw material formula is changed, the calcination temperature in a production process is reduced, boron oxide is added as a mineralizer, and meanwhile, gas replaces pulverized coal to be taken as the fuel, so that the problems that the bauxite and the limestone of the raw materials are not mixed sufficiently, reaction time is longer, more energy is consumed and the like in the traditional production process of the calcium aluminate powder are solved effectively.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to calcium aluminate powder with high dissolution rate. Background technique [0002] Calcium aluminate powder is mainly used in the production of water purifiers, fireproof materials, building anti-crack waterproof and other fields. The consumption of water purifiers accounts for about 70% of the total consumption, and the proportion of fireproof materials accounts for 15%. The proportion of usage is about 10%, and others account for 5%. With the further improvement of the country's environmental protection management requirements, its usage will still increase significantly. The market prospect of this product is getting wider and wider. Especially in the past 20 years, new processes, new technologies, and new equipment have emerged in various industrial sectors, which have promoted the development and transformation of calcium aluminate powder. The main components ...

AI Technical Summary

Problems solved by technology

However, many calcium aluminate powders currently on the market generally have poor performance, the content of CaO is as high as 31%, and the amount of CaLC obtained during application is much precipitated, and the precipitated slag causes pollution, and the energy consumption in the production process is large, etc.

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