A kind of Portland cement preparation method

Abstract

The invention relates to a method for preparing Portland cement, which uses a ball mill, which includes a bottom plate, a mounting plate, a grinding device, and a wall scraping device. The specific method flow for preparing Portland cement by using the ball mill is as follows: Clinker preparation, calcined clinker, clinker cooling, cement molding and inspection and packaging, grinding device includes drive motor, cylinder, inner lining plate, feeding pipe, material inlet, material outlet, material rack, compartment plate and steel The ball and the wall scraping device include a support rod, a lifting cylinder, a connecting rod, a scraping head, a fixed rod and an auxiliary mechanism. In the present invention, when the raw material is ground into powder through the grinding device, the powder adhered to the inner wall of the cylinder is scraped off in time through the wall scraping device to prevent waste and at the same time avoid the impact of the buffering effect on this part of the powder Reduce the grinding effect of steel balls. In addition, the wall scraping device can also regularly clean the scraping head to prevent too much powder adhering to the scraping head from affecting the scraping effect.

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%, and hydraulic cementitious material made by grinding an appropriate amount of gypsum are collectively referred to as Portland cement, and are collectively referred to internationally as Portland cement. Portland cement. [0003] In the preparation process of Portland cement, raw materials such as limestone and clay need to be ground into powdery materials for later use. There are some problems in this process: [0004] (1) At present, ball mills are generally 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 easily adhered to the inner wall of the cylinder due to the impact of the steel balls. I...

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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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