A cement grinding system process

Abstract

The present invention discloses a cement grinding system process, including a desulfurized gypsum hopper, a slag hopper, a gangue slag hopper, a crushed stone hopper, a spare hopper and a clinker hopper, wherein the lower ends of the desulfurized gypsum hopper, the slag hopper, the gangue slag hopper, the crushed stone hopper, the spare hopper and the clinker hopper are respectively provided with a first meter and a second meter. The present invention not only improves the cement production quality through a series joint grinding process consisting of a roller press and a mill, but also has a parallel process consisting of a mineral powder machine grinding, and solves the problem of low grinding utilization rate, improves the use of waste residues such as fly ash and desulfurized gypsum, reduces the cost of raw materials, and greatly reduces the comprehensive power consumption, reduces energy consumption and cement costs, and through two grinding processes, the mineral powder is blended with the cement base material, and the product advantages of the two grinding methods are brought into play to complement each other, so as to improve the grinding environment, improve the powder grinding efficiency, and facilitate use.

Description

Technical Field

[0001] The invention relates to the technical field of cement manufacturing equipment, and in particular to a cement grinding system process. Background Art

[0002] Cement grinding is the process of using external force to overcome the cohesive force between solid material molecules, split them, and reduce the particle size of material particles. It is called crushing or grinding, or simply grinding. It is the last process in cement manufacturing and the process that consumes the most electricity. Its main function is to grind cement clinker (and retarder, performance adjustment material, etc.) to a suitable particle size (expressed in fineness, specific surface area, etc.), form a certain particle gradation, increase its hydration area, accelerate the hydration rate, and meet the requirements of cement paste coagulation and hardening.

[0003] With the development of pre-decomposition kilns becoming more and more perfect, the heat consumption of clinker production has been greatly reduced. However, the existing cement production quality is low, and the comprehensive power consumption has remained high for a long time, resulting in excessive energy consumption and increased cement costs. When extrusion grinding technology replaces impact grinding technology, there are still problems of low grinding efficiency and grinding utilization, resulting in a large waste of raw material costs. For this reason, we propose a cement grinding system process to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cement grinding system process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cement grinding system process, comprising a desulfurized gypsum hopper, a slag hopper, a gangue slag hopper, a crushed stone hopper, a spare hopper and a clinker hopper, wherein the first meter and the second meter are respectively installed on both sides of the lower ends of the desulfurized gypsum hopper, the slag hopper, the gangue slag hopper, the crushed stone hopper, the spare hopper and the clinker hopper, one end of the five first metering devices is commonly connected to a stabilizing bin, the lower end of the stabilizing bin is connected to a roller press, one end of the roller press is connected to a V-type powder classifier, one side of the V-type powder classifier is connected to a dynamic powder classifier, one side of the upper end of the V-type powder classifier chamber is connected to one side of the stabilizing bin, a feeder is provided between the V-type powder classifier and the stabilizing bin, a mixing chute is provided on one side of the dynamic powder classifier, and the dynamic powder classifier is connected to the mixing chute. A dust collector is provided between the mixing chute, the lower end of the dust collector is connected to a fine powder hopper, the lower end of the fine powder hopper is provided with a fine powder meter, the lower end of the fine powder meter is connected to a fly ash hopper, the lower end of the dynamic powder selector is connected to a mill, the upper end of the mill is provided with a mill tail dust collector, and the lower end of one side of the mill tail dust collector is connected to one side of the mixing chute, a mill outlet cement silo is provided at the lower end of the mixing chute, and the mixing chute is arranged through the upper end of the mill outlet cement silo, a mill outlet meter is provided at the lower end of the mill outlet cement silo, the lower end of the mill outlet meter is connected to a mixer, one side of the mixer is provided with a factory cement silo, and one side of the mixer is connected to one side of the factory cement silo.

[0007] Preferably, the lower ends of the five second metering devices are commonly connected to a mineral grinding mill, one side of the mineral grinding mill is connected to a mineral powder storage, one side of the mineral powder storage is equipped with a mineral powder meter, and one side of the mineral powder meter is connected to one side of the mixer.

[0008] Preferably, the mill is an open-flow 3.8*13M tube mill.

[0009] Preferably, the ore grinding mill is a vertical cement ore grinding mill, and the model is PCL-269.

[0010] Preferably, a dust suction device is provided in the mill tail dust collector.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The process consists of a series joint grinding process consisting of a roller press and a mill, and a parallel process consisting of a mineral powder machine grinding process. This process has many ingredients. Clinker, desulfurized gypsum, gangue slag, and crushed stone can also be added when the mineral powder is ground. The powders ground by the two processes have different particle sizes. After being mixed by a mixer, the cement particle size distribution range is wide, the prepared concrete has excellent performance, and the cement quality is improved;

[0013] 2. Combine the advantages of roller press, tube mill, and vertical mill for producing mineral powder. Through two grinding processes, the mineral powder is blended with cement base material, and the advantages of the two grinding methods are complemented to improve the grinding environment, increase the grinding efficiency of powder materials, and facilitate use.

[0014] 3. Through the coordination of dust collector, mill tail dust collector, V-type powder classifier and dynamic powder classifier, the dust collector and mill tail dust collector are used to collect dust-containing gas, which solves the problem of low grinding utilization rate, improves the utilization of fly ash, desulfurized gypsum and other waste residues, reduces raw material costs, greatly improves product quality, greatly reduces production costs, and is easy to use;

[0015] To sum up, the present invention not only improves the quality of cement production through the series combined grinding process consisting of a roller press and a grinder, but also has a parallel process consisting of a mineral powder machine grinding, which solves the problem of low grinding utilization rate, improves the utilization of waste residues such as fly ash and desulfurized gypsum, reduces the cost of raw materials, and greatly reduces the comprehensive power consumption, reduces energy consumption and cement costs. Through the two grinding processes, the mineral powder and cement base material are blended, and the product advantages of the two grinding methods are complemented, thereby improving the grinding environment, improving the powder grinding efficiency, and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an optimized flow chart of a cement grinding system process proposed by the present invention;

[0017] Figure 2 This is a pre-optimization flow chart of a cement grinding system process proposed by the present invention; DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-2A cement grinding system process comprises a desulfurized gypsum hopper, a slag hopper, a gangue slag hopper, a crushed stone hopper, a spare hopper and a clinker hopper, wherein the first meter and the second meter are respectively installed on both sides of the lower ends of the desulfurized gypsum hopper, the slag hopper, the gangue slag hopper, the crushed stone hopper, the spare hopper and the clinker hopper, one end of the five first metering devices is commonly connected to a stabilizing bin, the lower end of the stabilizing bin is connected to a roller press, one end of the roller press is connected to a V-type powder classifier, one side of the V-type powder classifier is connected to a dynamic powder classifier, and the V The upper end of the V-type powder selector room is connected to one side of the stabilizing bin, and a feeder is provided between the V-type powder selector and the stabilizing bin. The raw materials in the desulfurized gypsum hopper, slag hopper, gangue slag hopper, crushed stone hopper, spare hopper and clinker hopper are respectively transported to the stabilizing bin through five first metering devices. The materials in the stabilizing bin are transported to the roller press for crushing and rolling, and then transported to the V-type powder selector for screening. The coarse particles are transported to the stabilizing bin through the conveyor for roller crushing again, which improves the crushing effect, saves the raw material cost and is convenient to use.

[0020] A mixing chute is provided on one side of the dynamic powder classifier, a dust collector is provided between the dynamic powder classifier and the mixing chute, a fine powder hopper is connected to the lower end of the dust collector, a fine powder meter is provided at the lower end of the fine powder hopper, a fly ash hopper is connected to the lower end of the fine powder meter, a mill is connected to the lower end of the dynamic powder classifier, the mill is an open-flow 3.8*13M tube mill, a mill tail dust collector is provided at the upper end of the mill, a dust suction device is provided in the mill tail dust collector, and the lower end of the mill on one side of the mill tail dust collector is connected to one side of the mixing chute, the raw material fine particles are transported to the dynamic powder classifier for dynamic screening, and the fine powder appearing in the air during dynamic screening by the dynamic powder screening machine passes through the dust collector. The fine powder is transported to the fine powder hopper, and then transported to the fly ash hopper through the fine powder meter. The qualified products screened in the dynamic powder classifier are transported to the mixing chute. The coarse powder screened in the dynamic powder classifier is transported to the open-flow 3.8*13M tube mill for re-crushing and grinding. The dust-containing gas in the open-flow 3.8*13M tube mill is absorbed by the dust collector at the end of the mill and transported to the mixing chute. The qualified products ground by the open-flow 3.8*13M tube mill are transported to the mixing chute, and the open-flow 3.8*13M tube mill is used for multiple series grinding, so that the powders ground by the two processes have different particle sizes. After mixing, the cement particle size distribution range is wide, and the prepared concrete has excellent performance.

[0021] A mill cement silo is provided at the lower end of the mixing chute, and the mixing chute is arranged through the upper end of the mill cement silo, a mill meter is provided at the lower end of the mill cement silo, and a mixer is connected to the lower end of the mill meter, a factory cement silo is provided on one side of the mixer, and one side of the mixer is connected to one side of the factory cement silo, the powder in the mixing chute enters the mill cement silo, and is transported to the mixer through the mill meter according to production needs, and after being fully mixed in the mixer, it is transported to the factory cement silo to wait for packaging and shipment, which is convenient for use.

[0022] In the present invention, the lower ends of the five second metering devices are commonly connected to a mineral powder mill, which is a vertical cement mineral powder mill of model PCL-269. One side of the mineral powder mill is connected to a mineral powder bin, one side of the mineral powder bin is equipped with a mineral powder meter, one side of the mineral powder meter is connected to one side of a mixer, and the raw materials in the desulfurized gypsum hopper, slag hopper, gangue slag hopper, crushed stone hopper, spare hopper and clinker hopper are respectively transported to the vertical mineral powder mill through the five second metering devices for crushing and grinding, and the qualified mineral powder is transported to the mineral powder bin, and the mineral powder is transported to the mixer through the mineral powder meter according to production needs.

[0023] In the present invention, when in use, the raw materials in the desulfurized gypsum hopper, slag hopper, gangue slag hopper, crushed stone hopper, spare hopper and clinker hopper are respectively transported to the stable material bin through five first metering devices, the materials in the stable material bin are transported to the roller press for crushing and rolling, and then transported to the V-type powder selector for screening, the coarse particles are transported to the stable material bin through the conveyor for roller crushing again, the fine particles of the raw materials are transported to the dynamic powder selector for dynamic screening, and the fine powder appearing in the air during the dynamic screening of the dynamic powder screener is transported to the fine powder screener through the dust collector. The powder hopper is then transported to the fly ash hopper through the fine powder meter. The qualified products screened in the dynamic powder selector are transported to the mixing chute. The coarse powder screened in the dynamic powder selector is transported to the open-flow 3.8*13M tube mill for re-crushing and grinding. The dust-containing gas in the open-flow 3.8*13M tube mill is absorbed by the dust collector at the end of the mill and transported to the mixing chute. The qualified products ground by the open-flow 3.8*13M tube mill are transported to the mixing chute. The powder in the mixing chute enters the cement storage at the outlet of the mill. The raw materials in the desulfurized gypsum hopper, slag hopper, gangue slag hopper, crushed stone hopper, spare hopper and clinker hopper are respectively transported to the vertical ore mill through five second meters for crushing and grinding. The qualified ore powder is transported to the ore powder warehouse. The ore powder is transported to the mixer through the ore powder meter according to the production needs. After being fully mixed in the mixer, it is transported to the factory cement warehouse to wait for packaging and shipment. The present invention adopts "small grate gap and large circulation" and "roller press double closed circuit system + ball ... The combined grinding technology of "open-circuit grinding system" combines the advantages of roller press high efficiency, tube mill product quality and vertical mill mineral powder making technology. Through separate grinding processes, the mineral powder is blended with cement base materials to give full play to the complementary product advantages of the two grinding methods, so as to improve the grinding environment and improve the quality of finished products. The comprehensive power consumption of cement is greatly reduced, the product quality is greatly improved, the production cost is greatly reduced, and the annual utilization of fly ash, desulfurized gypsum and other waste residues reaches 400,000 tons, which is energy-saving, environmentally friendly and easy to use.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cement grinding system process, including a desulfurized gypsum hopper, a slag hopper, a gangue slag hopper, a crushed stone hopper, a spare hopper and a clinker hopper, characterized in that: The first meter and the second meter are respectively installed on both sides of the lower ends of the desulfurized gypsum hopper, slag hopper, gangue slag hopper, crushed stone hopper, spare hopper and clinker hopper, one end of the five first metering devices is commonly connected to a stabilizing bin, the lower end of the stabilizing bin is connected to a roller press, one end of the roller press is connected to a V-type powder classifier, one side of the V-type powder classifier is connected to a dynamic powder classifier, one side of the upper end of the V-type powder classifier is connected to one side of the stabilizing bin, and a feeder is provided between the V-type powder classifier and the stabilizing bin, a mixing chute is provided on one side of the dynamic powder classifier, a dust collector is provided between the dynamic powder classifier and the mixing chute, and the lower end of the dust collector is connected to the mixing chute. A fine powder hopper is connected, a fine powder meter is provided at the lower end of the fine powder hopper, a fly ash hopper is connected at the lower end of the fine powder meter, a mill is connected at the lower end of the dynamic powder selector, a mill tail dust collector is provided at the upper end of the mill, and the lower end of one side of the mill tail dust collector is connected to one side of the mixing chute, a mill discharge cement silo is provided at the lower end of the mixing chute, and the mixing chute is arranged through the upper end of the mill discharge cement silo, a mill discharge meter is provided at the lower end of the mill discharge cement silo, a mixer is connected at the lower end of the mill discharge meter, a factory cement silo is provided at one side of the mixer, and one side of the mixer is connected to one side of the factory cement silo; The lower ends of the five second metering devices are commonly connected to a mineral powder mill, one side of the mineral powder mill is connected to a mineral powder silo, one side of the mineral powder silo is equipped with a mineral powder meter, and one side of the mineral powder meter is connected to one side of the mixer; The mill is an open flow 3.8*13M tube mill; The ore grinding mill is a vertical cement ore grinding mill.

2. A cement grinding system process according to claim 1, characterized in that: A dust collecting device is arranged in the grinding tail dust collector.

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