Portland cement preparation method

Abstract

The invention relates to a Portland cement preparation method. A ball mill is used, the ball mill comprises a bottom plate, a mounting plate, a grinding device and a wall scraping device. The specific method for preparing Portland cement through the ball mill comprises the following steps of raw material preparation, clinker calcination, clinker cooling, cement forming, inspection and packaging. The grinding device comprises a driving motor, a barrel, a lining plate, a feeding pipe, a feeding opening, a discharging opening, a material containing frame, a bin partition plate and a steel ball, and the wall scraping device comprises a supporting rod, a lifting barrel, a connecting rod, a scraping head, a fixing rod and an auxiliary mechanism. When raw materials are ground into powder through the grinding device, the powder attached to the inner wall of the barrel is scraped off in time through the wall scraping device, waste is prevented, meanwhile, the situation that the grinding effect of steel balls is reduced under the influence of the buffering effect of the powder is avoided, and in addition, the wall scraping device can also clean a scraping head regularly, the wall scraping effect is prevented from being influenced by excessive powder adhered to the scraping head.

Description

technical field [0001] The invention relates to the field of cement, in particular to a preparation method of Portland cement. Background technique [0002] Portland cement clinker mainly composed of calcium silicate, limestone or granulated blast furnace slag with less than 5% limestone or granulated blast furnace slag, and hydraulic cementitious materials made by grinding an appropriate amount of gypsum are collectively referred to as Portland cement. Portland cement. [0003] During the preparation of Portland cement, limestone, clay and other raw materials need to be ground into powdered materials for later use. There are some problems in this process: [0004] (1) At present, ball mills are commonly used for powder grinding operations. The raw materials are gradually ground into powder through the random collision of steel balls. Part of the powder is easy to adhere to the inner wall of the cylinder due to the impact of steel balls. If it is not correct for a long time...

AI Technical Summary

Problems solved by technology

[0004] (1) At present, ball mills are commonly used for powder grinding operations. The raw materials are gradually ground into powder through the random collision of steel balls. Part of the powder is easy to adhere to the inner wall of the cylinder due to the impact of steel balls. If it is not correct for a long time Cleaning it up will cause waste of raw materials. In addition, due to the powder adhered to the inner wall of the cylinder, the powder will play a certain buffering effect when the steel ball collides with the cylinder, resulting in the weakening of the impact force of the steel ball and grinding Reduced effect;

[0005] (2) At present, some manufacturers choose to regularly clean the cylinder to scrape off the powder adhered to the inner wall of the cylinder. During cleaning, the equipment needs to be shut down, which reduces the production efficiency of the manufacturer. After processing it, after a long time of collision with steel balls, the powder will form a hard shell, which is difficult to clean up in the later stage

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