CN204866123U - Screening plant's roll squeezer grinding system is taken to high pressure high efficiency - Google Patents

Abstract

The utility model discloses a high-pressure and high-efficiency roller press grinding system with a screening device, which comprises a roller press and a ball mill. Extrusion and crushing, the fine powder discharged from the outlet of the roller press is sent to the mechanical screening device through the elevator, and the particles smaller than the mesh aperture of the mechanical screening device are sent to the ball mill, and after entering the ball mill, the finished product is made by fine grinding and shaping. The system abandons the traditional air selection and classification method and adopts mechanical screening and classification to reduce system energy consumption. The high-pressure operation of the roller press increases the output of fine powder, and the material leakage of the edge of the roller press is controlled by the ball mill to realize the mechanical screening of the material. adaptability. The utility model can increase the output of the system as a whole and reduce the energy consumption of the system.

Description

High-pressure and high-efficiency roller press grinding system with screening device

technical field

The utility model mainly relates to a grinding production process in the building material industry, in particular to a high-pressure, high-efficiency roller press grinding system with a screening device in the cement grinding production process.

Background technique

China's cement grinding process mainly has the following two forms: the ball mill grinding system and the combined grinding system of roller press and ball mill. Among them, the technology of final grinding of ball mill was developed earlier. It has the advantages of simple process and low investment, but it has low efficiency and high energy consumption. It is a relatively backward process and is being rapidly eliminated. The combined grinding technology of roller press and ball mill has developed rapidly in recent years. It has the characteristics of high grinding efficiency and low energy consumption. It has become the mainstream process of cement grinding in China. Most of the new production lines after 2000 use The craft.

The roller press adopts the principle of high-pressure material layer crushing, and the particle size of brittle materials decreases rapidly after high-pressure extrusion, and there are a large number of microcracks in all the extruded materials, which improves the grindability of the materials and makes the materials pulverize in the next process. When grinding, the required energy consumption is greatly reduced. The extrusion grinding system using roller press pre-grinding can increase production by 50-200% compared with the original traditional pure ball mill grinding system, and reduce power consumption per unit production by 20-40%, saving energy and reducing electricity consumption for cement production. So as to achieve sustainable development.

As the country puts forward higher requirements for energy saving and consumption reduction, how to further improve the grinding efficiency of the roller press and reduce the energy consumption of the grinding system has become a hot topic of research.

Utility model content

The purpose of this utility model is to provide a high-pressure and high-efficiency roller press grinding system with a screening device, which abandons the traditional winnowing type classification method and uses mechanical screening and classification to reduce system energy consumption. Increase the output of fine powder, realize the adaptability of the ball mill to the material after mechanical screening through the control of material leakage at the edge of the roller press, increase the output of the system as a whole, and reduce the energy consumption of the system.

The technical scheme of the utility model is as follows:

High-pressure and high-efficiency roller press grinding system with screening device, including roller press and ball mill. There is a weighing chamber above the roller press. The hydraulic system pressure of the roller press crushes the fed materials. The roller press The fine powder discharged from the discharge port is sent to the mechanical screening device through the elevator, and the particles smaller than the sieve aperture of the mechanical screening device are sent to the ball mill. After entering the ball mill, the finished product is made by fine grinding and shaping. There is a dust collector to collect the dust, and the particles larger than the mesh aperture of the mechanical screening device are circulated back to the weighing chamber.

The roller press is equipped with a side anti-wear blocking device, and the blocking plate is partially or completely riding on the roller surface, and the amount of material leakage at the edge of the roller press is controlled by adjusting the blocking plate of the anti-wear blocking device. The proportion of volume should be less than 5% of the throughput of the roller press.

The roller press operates in a high-pressure state, and the operating pressure of its hydraulic system is at least 15% higher than that of a system using air separation and classification.

The mechanical screening device of the utility model is a grading equipment, and is equipped with auxiliary equipment such as a hoist and a dust collector. The brittle raw materials to be processed are extruded and crushed by a roller press, and the extruded materials are broken up and classified by a mechanical screening device, and finely ground and shaped by a ball mill. Fresh materials are first fed into the weighing chamber of the roller press, and the materials in the weighing chamber (including the materials returned by the system) are fed into the roller press for extrusion and crushing. The roller press operates under high pressure, and its hydraulic system pressure It is more than 15% higher than the traditional system using winnowing and grading to improve the crushing efficiency and produce more fine powder. At the same time, the roller press needs to adopt the side anti-wear blocking device described in the patent 201420162621.5, and the blocking plate is partially or completely mounted on the roller surface to reduce the edge leakage of the roller press and reduce the proportion of insufficiently extruded materials. 5% of the throughput of the roller press.

The material is extruded by a roller press to form a cake, which contains a large amount of fine powder and small particles covered with cracks. It is sent to the mechanical screening device by the elevator for breaking up and grading, and the particles larger than the aperture of the screen are returned to the roller. The weighing chamber of the press enters the roller press together with the fresh incoming materials for extrusion, and the particles smaller than the pore size of the screen are fed into the ball mill.

The materials fed to the ball mill are mainly fine powder, small cakes that have not been sufficiently broken up, and small particles that are covered with cracks after extrusion. Therefore, although it is relatively coarse overall, it has good grindability. After fine grinding and shaping, the finished product is the finished product.

The utility model has a unique technological process, which not only greatly reduces the energy consumption of the system, but also fully exerts the crushing efficiency of the roller press, and truly achieves the effect of increasing production, saving energy and reducing consumption.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Referring to the accompanying drawings, the high-pressure and high-efficiency roller press grinding system with a screening device includes a roller press 1 and a ball mill 4. There is a weighing chamber 6 above the roller press 1, and the pressure pair of the hydraulic system of the roller press 1 is fed into the The material is extruded and crushed, and the material discharged from the outlet of the roller press 1 is sent to the mechanical screening device 3 through the elevator 2, and the particles smaller than the mesh diameter of the mechanical screening device 3 are sent to the ball mill 4, and after entering the ball mill 4, pass through The finished product is made by fine grinding and shaping. The discharge port of the ball mill 4 is connected to a dust collector 5 to collect dust, and the particles larger than the mesh aperture of the mechanical screening device 3 are circulated back to the weighing chamber 6. The roller press 1 is equipped with a side Edge anti-wear blocking device, part or all of the blocking plate rides on the roller surface. The roller press is equipped with a side anti-wear blocking device, and the blocking plate is partially or completely riding on the roller surface, and the amount of material leakage at the edge of the roller press is controlled by adjusting the blocking plate of the anti-wear blocking device. The proportion of volume should be less than 5% of the throughput of the roller press. The roller press operates under a high pressure state, and the operating pressure of its hydraulic system is at least 15% higher than that of a system using wind selection and classification.

The fresh material is first fed into the weighing chamber of the roller press 1, and is fed into the roller press 1 together with the material returned from the mechanical screening device 3 for extrusion and crushing. The roller press 1 operates under high pressure, and its hydraulic pressure The system pressure is more than 15% higher than the traditional system using winnowing and grading. At the same time, the side anti-wear blocking device that the roller press 1 needs to adopt is disclosed in patent 201420162621.5, and its blocking plate is partially or completely mounted on the roller surface to reduce the edge leakage of the rolling machine and make the insufficiently squeezed The proportion of material is less than 5% of the throughput of the roller press.

The materials squeezed by the roller press 1 are sent to the mechanical screening device 3 through the elevator 2 for breaking up and grading, and the materials larger than the aperture of the screen are returned to the weighing chamber of the roller press 1, and enter the roller press together with fresh materials 1 re-extrusion, and the particles smaller than the aperture of the screen are fed into the ball mill 4. The ball mill 4 finely grinds and shapes the materials, and the finished materials are finished products. The system is collected and ventilated through the dust collector 5 .

Claims (3)

1. The high-pressure and high-efficiency roller press grinding system with screening device is characterized in that it includes a roller press and a ball mill. There is a weighing chamber above the roller press, and the pressure of the hydraulic system of the roller press squeezes the fed materials. Pressing and crushing, the fine powder discharged from the outlet of the roller press is sent to the mechanical screening device through the elevator, and the particles smaller than the mesh aperture of the mechanical screening device are sent to the ball mill, and after entering the ball mill, the finished product is made by fine grinding and shaping. The discharge port of the machine is connected to a dust collector to collect dust, and the particles larger than the mesh aperture of the mechanical screening device are circulated back to the weighing bin. 2. The roller press grinding system with high-pressure and high-efficiency belt screening device according to claim 1, characterized in that, the roller press is provided with a side anti-wear blocking device, and part or all of the blocking plate rides on the On the roller surface, the amount of material leakage at the edge of the roller press is controlled by adjusting the material blocking plate of the anti-wear blocking device. The proportion of material leakage must be lower than 5% of the throughput of the roller press. 3. the roller press grinding system of high-pressure high-efficiency band screening device according to claim 1, it is characterized in that, described roller press adopts high-pressure state operation, and the operating pressure ratio of its hydraulic system adopts the air separation classification System at least 15% higher.