Method for preparing Portland cement clinker

Abstract

The invention relates to a method for preparing Portland cement clinker. The method comprises the following steps: proportionally mixing tetraethoxysilane, a calcium nitrate hydrate, an aluminium nitrate hydrate, a ferric nitrate hydrate, ethanol, nitric acid, hexamethylenetetramine, acetylacetone, deionized water and the like uniformly to obtain four kinds of mixed liquid, fully stirring the four kinds of mixed liquid respectively at the temperature of 50-70 DEG C until proper viscosity to obtain monomineral sols of the Portland cement clinker, then mixing the four monomineral sols in a massratio of (36-55):(24-40):(11-19):(20-31), ageing the mixture to form gel, carrying out heat treatment on the gel at the temperature of 1150-1200 DEG C for 4-6 hours and cooling the gel to the room temperature, thus obtaining the Portland cement clinker. Compared with the prior art, the method has the following advantages: the preparation process is simple; the reaction process is easy to control;and the product has high uniformity and purity and can be fired at the temperature lower than the temperature in the traditional methods.

Description

technical field [0001] The invention relates to a preparation method of inorganic materials, in particular to a preparation method of Portland cement clinker. Background technique [0002] When studying cement hydration, in order to minimize unknowable factors, laboratory-synthesized cement and clinker single minerals are usually used as research objects. However, when using the traditional high-temperature sintering reaction method to synthesize cement clinker minerals, not only the required reaction temperature is high, but also because mineralizers are usually used to reduce the sintering temperature or make certain crystal forms of single mineral crystals stable at room temperature. Existence, will introduce other components in cement clinker minerals. [0003] In recent years, with the emergence of various chemical methods, it has brought about a revolution in the synthesis of cement clinker minerals. They all try to overcome the shortcomings of the traditional solid-s...