Control method for grinding process optimization of cement factory

Abstract

The invention discloses an optimal control method for a grinding process in a cement plant. By collecting grinding process signals and taking the advanced control as the core, the method realizes automatic control of material level and material level distribution, automatic control of circulating load and ventilation and also realizes optimization of material level of every bin in the mill, optimization of material velocity, optimization of circulating load and ventilation and also realizes output control of feed quantity, rotational speed of a powder-choosing machine and the rotational speed of a fan. The method optimizes the whole grinding process and realizes maximum time-production operation of the grinding process and minimum grinding unit consumption. At the same time, the failure of the grinding process is diagnosed, the safety of the grinding process is estimated, the grinding process is evaluated and analyzed, and the reasonable suggestion is given to the operation of the grinding process, thus assuring a continual, stable, safe and economical operation of the grinding process. The method can be widely used in the grinding process in the cement plant or in similar grinding processes in other fields.

Description

Technical field

[0001] The invention relates to the technical field of automatic control, in particular to an optimized control method for the grinding process of a cement plant. Background technique

[0002] The cement production process needs to control the chemical composition of the product (the content of calcium, iron, sulfur, etc.), control the fineness (or specific surface area) of the product, and increase the output of the grinding production process while meeting the quality requirements.

[0003] At present, the microcomputer batching system adopted by our country's cement plants realizes the control of the proportion of different materials, so that the chemical composition in the production process can meet the qualified requirements. However, when performing fineness control, it is difficult to achieve maximum output under qualified quality conditions, mainly relying on the experience of operators to control the feeding amount. Summary of the invention

[0004] The...

Examples

Embodiment

[0062] The type of cement mill in a cement plant is a closed-circuit mill. The size of the mill is 3.2m×13m, two-chamber mill, with a design output of 60t / h, and a maximum ball load of 133 tons. The grinding head is equipped with a roller pressure dispersing system. . The process flow of the grinding production process is as follows: the materials with a good ratio are transported to the 40t small silo at the front end of the roller press through the elevator, and the materials are squeezed by the roller press and lifted to the dispersing machine. There are two flow directions. The coarser material is sent to the 40t small silo by the conveying equipment. The suitable material enters the grinding head silo, and is sent to the mill through the rotor quantitative feeding scale for grinding; the finished cement is passed through the classifier for coarse powder. In the separation and dust removal process, the finished products with qualified fineness are sent to the cement warehouse,...

Technical field

[0001] The invention relates to the technical field of automatic control, in particular to an optimized control method for the grinding process of a cement plant. Background technique

[0002] The cement production process needs to control the chemical composition of the product (the content of calcium, iron, sulfur, etc.), control the fineness (or specific surface area) of the product, and increase the output of the grinding production process while meeting the quality requirements.

[0003] At present, the microcomputer batching system adopted by our country's cement plants realizes the control of the proportion of different materials, so that the chemical composition in the production process can meet the qualified requirements. However, when performing fineness control, it is difficult to achieve maximum output under qualified quality conditions, mainly relying on the experience of operators to control the feeding amount. Summary of the invention

[0004] The...

Examples

Embodiment

[0062] The type of cement mill in a cement plant is a closed-circuit mill. The size of the mill is 3.2m×13m, two-chamber mill, with a design output of 60t / h, and a maximum ball load of 133 tons. The grinding head is equipped with a roller pressure dispersing system. . The process flow of the grinding production process is as follows: the materials with a good ratio are transported to the 40t small silo at the front end of the roller press through the elevator, and the materials are squeezed by the roller press and lifted to the dispersing machine. There are two flow directions. The coarser material is sent to the 40t small silo by the conveying equipment. The suitable material enters the grinding head silo, and is sent to the mill through the rotor quantitative feeding scale for grinding; the finished cement is passed through the classifier for coarse powder. In the separation and dust removal process, the finished products with qualified fineness are sent to the cement warehouse,...

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