Preparation method and application method of low-carbon cement clinker

Abstract

The invention relates to a preparation method and an application method of low-carbon cement clinker. The low-carbon cement clinker is prepared by the steps: uniformly mixing raw materials of silicon-aluminum containing material, limestone and gypsum according to a certain ratio; grinding the mixture to form a raw material, wherein the grain size of the ground raw material requires that residue on a 0.08-mm square hole sieve is less than 10%; calcining the ground raw material for 20 to 40 minutes at the calcining temperature of 1200 to 1300 DEG C; cooling to obtain the low-carbon cement clinker. The low-carbon cement clinker provided by the invention comprises 10 to 25 percent of beta-dicalcium silicate, 5 to 15 percent of calcium sulphosilicate, 15 to 45 percent of tricalcium silicate and 15 to 45 percent of calcium sulphoaluminate. 0.01 to 15 percent of gypsum and 0.01 to 15 percent of limestone are added into the low-carbon cement clinker and then are ground to obtain a cement finished product. The preparation method and the application method of the low-carbon cement clinker have the advantages of low calcining temperature, short coagulation time, high hardening speed, high early strength and continuously enhanced later strength.

Description

technical field [0001] The invention belongs to the technical field of cement clinker production, and in particular relates to a preparation method of low-carbon cement clinker and an application method thereof. Background technique [0002] The raw materials for the production of traditional Portland cement are mainly lime, clay and other silicon, aluminum and iron correction materials. The main mineral components of cement clinker are tricalcium silicate, dicalcium silicate, tricalcium aluminate and ferroaluminate Four calcium. Usually tricalcium silicate accounts for 60-70% of the mineral composition, dicalcium silicate accounts for 15-25%, tricalcium aluminate accounts for 5-10%, and tetracalcium aluminoferrite accounts for 10-15%. The traditional Portland cement clinker has a high content of tricalcium silicate minerals, which not only requires a high firing temperature, but also requires a high grade of limestone. Therefore, the traditional cement industry is a typica...

AI Technical Summary

Problems solved by technology

For example, the patent record of application number 201210022401 contains 25-30% -C2S; 25-30% -C2S; 28-40% C4A3 Š; 4-12% C4AF; 4-8% amorphous Phase substance, the cement improves the early strength of cement by generating a large amount of -C2S, but the generation conditions are difficult to control

The patent application number 200610045503.6 records the Belite-barium calcium sulphoaluminate cement compounded with barium calcium sulphoaluminate minerals and belite minerals, but due to the limitation of barium sulfate resources, large-scale production is impossible

Another study shows that the 3-day and 28-day strength of cement cannot meet the engineering requirements because of the low hydration activity of Belite minerals

Images