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What are the grinding processes in cement plants? Introduction to cement grinding equipment

What are the grinding processes in cement plants? Introduction to cement grinding equipment



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The cement production process is a process with complex process design. Only by having a comprehensive understanding of each link can we effectively improve production efficiency and ensure the quality of cement production. In the following article, we will introduce the cement plant grinding process and cement grinding equipment.


Introduction to grinding process in cement plant
When it comes to cement production, there will be talk of "two grinding and one burning", which are: raw meal preparation, clinker calcination, and cement grinding. Typically, the cement industry produces Portland cement, which is a fine, usually gray powder made of calcium (from stone), silicates, aluminates (clay) and Ferrite combination.

In the cement production process, a large part of the raw materials need to be crushed, such as stones, clay, iron rocks, coal, etc. Since stones are a large amount of raw materials used in the production process, the particles after mining are larger and the Mohs hardness increases. , so the crushing of stones occupies a relatively important position in the crushing of cement stones. Crushing equipment mainly includes jaw crusher, impact crusher, etc.

Cement grinding is an important process in making cement, and it is also the process that consumes the most electricity. The main function of grinding is to grind cement clinker into a suitable particle size to form a certain particle gradation, thereby increasing its hydration area, accelerating its hydration rate, and meeting the requirements for the coagulation and hardening of the cement slurry. need.

Introduction to cement grinding equipment
The ball mill is the key equipment for crushing the cement after it is broken. There are currently many types of ball mills, but no matter what kind of ball mill it is, its structure is basically composed of five parts: a feeding device, a supporting device, a rotating part, a discharge device and a transmission device. Its hollow shaft is made of cast steel with a removable inner lining. The large rotary gear is machined by cast hobbing, and the body is inlaid with a wear-resistant lining plate, which has good wear resistance.


The working principle of the cement ball mill: the ball mill is rotated through the movement of the gear mounted on the cylinder. The grinding media such as steel balls, steel rods or gravel and the ore to be crushed are installed in the cylinder. The loading amount is the total effective volume of the cylinder. 25%-45%. The grinding medium and ore in the cylinder achieve a crushing effect under the action of centrifugal force and friction, and the ground finished product is discharged from the hollow journal at one end of the cylinder. The movement of the ore in the barrel of the ball mill is achieved by continuously applying pressure to the ore. During wet grinding, the ore is taken away by the water flow. During dry grinding, the ore is taken away by the air flow drawn out of the cylinder.

Cement mill performance advantages
1. Zero pollution, low noise

The complete operation of the ball mill adopts a special "zero-emission positive pressure operation system" with good airtightness, which can ensure zero pollution leakage during the production process. The fan implements sound insulation measures to ensure that the noise of the ball mill is ≤70 decibels and the equipment noise is low.

2. Adjustable granularity, low failure rate, and good operation

The structural design of the ball mill adopts an automatic discharging and back-grinding system. The particle size of the incoming and outgoing materials can be adjusted, and internal lubricating parts are not required, which reduces the occurrence of equipment failures and enables the overall ball mill to achieve more ideal operating conditions and enable long-term continuous operation.

3. Strong versatility

It is suitable for the grinding of various ore crushing productions today, including the grinding of various high and low hardness metal ores, non-metallic ores, various sinter materials and other materials. The grinding and activation can be completed at one time, and the purity of the product can be adjusted in each case. Widely used in demanding industries.

What are the grinding processes in cement plants? Introduction to cement grinding ball mill equipment
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