Cooling bleaching production technique of white portland cement clinker

Abstract

The invention relates to a cooling bleaching production technique of white silicate cement clinker, comprising the following steps: discharging calcined high-temperature white silicate cement clinkerfrom a kiln, conveying the clinker into an air heat exchanger for 5-500 seconds of bleaching by wind cooling; delivering the hot air that conducts heat exchange with the high-temperature clinker intoa clinker calcining kiln so as to be used as secondary combustion air; and transferring the clinker bleached by the air heat exchanger into a normal spray-type or soak-type cooling bleaching machine for spray-type or soak-type cooling bleaching until the clinker is cooled down to the temperature of 20-100 DEG C. Compared with the existing production technique, the white silicate cement clinker isbeneficial to decreasing the heat consumption for calcining the clinker, and promoting the sufficient combustion of fuels, thus improving the calcining yield of the kiln; besides, two times of coolingbleaching with different media is beneficial to improving the quality of the white cement clinker.

Description

technical field [0001] The invention relates to a white Portland cement clinker cooling and bleaching production process. Background technique [0002] In the production process of white Portland cement, the cooling and bleaching production process after the clinker is fired has been used in the whole industry for more than a century. The combustion-supporting air is used to calcine the clinker, and the high-temperature clinker after firing is directly entered into the cooling and bleaching machine equipped with a spray water pipe or a water immersion tank from the kiln discharge port, and the clinker is cooled by spraying or immersing in water. bleach. Although this production process is simple and convenient, there is a large heat consumption of clinker firing, which is as much as 1.6-2 times that of general-purpose cement clinker firing, and the recovery and utilization rate of clinker waste heat is zero, which seriously restricts The output and quality of clinker firin...

AI Technical Summary

Problems solved by technology

Although this production process is simple and convenient, there is a large heat consumption of clinker firing, which is as much as 1.6-2 times that of general-purpose cement clinker firing, and the recovery and utilization rate of clinker waste heat is zero, which seriously restricts The yield and quality of clinker firing

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