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Cement roller press

Production Capacity: 950~1050 t/h

Application: various materials, raw material of cement, clinker and other materials. 

The cement roller press is a kind of cement equipment for brittle materials, apply for cement clinker, and cement raw material, gypsum, coal, quartz sand, iron ore, blast furnace slag, and other materials.

The cement roller press is generally applied to the cement grinding plant, according to the real working process, cement roller press works with cement ball mill or vertical cement mill, which helps cement grinding plant to works well.

As new-type and energy-efficient cement grinding machine, cement roller press has advantages of energy-saving, high efficiency, less steel consumption and less noise. Both apply for new cement plant building and old cement plant revamping. According to the data, roller press helps ball mill system to increase the output by 30-50%. The 0.08mm fine material in the extruded material cake accounts for 20-35%, and smaller than 2mm accounts for 65-85%.

cement grinding equipment
cement roller press

Advantages of cement roller press

Increase the output

install the roller press in the cement grinding plant, the high pressure load is transmitted to the layer of the grinded material through the diameter of the double roller, most of the energy is used for the mutual extrusion between the materials. The sound energy and thermal energy generated by the friction of the material are transformed into the deformation energy of the material, which causes deformation, tearing and pulverization and fully utilize the potential of the cement grinding equipment, increase the output by 50-100%, and reduce the total energy consumption by 20%-30%. Promote the production efficiency of the entire system.

Reduce power consumption

The material after grinding is greatly reduced in both particle size and the Bond function index, thereby greatly improving the grinding condition of grinding machine, and the power consumption of the entire cement grinding system is significantly reduced. It can save25-50% energy compared to traditional grinding methods, and the annual electricity saving are considerable.

Saving investment

Compared with the tube mill, the roller press is simple in structure, small in size, light in weight, and takes up less space in the workshop. It can save civil construction investment and also facilitate the original investment. In addition, the operation and maintenance of the roller press is very simple.

Good working environment

The material is squeezed and smashed continuously in the roller cover, and the harmful dust is not easy to spread. At the same time, the noise of the roller press is much smaller than that of the tube mill because of no impact.

Easy to develop

The traditional tube mill is limited by processing, transportation, heat treatment and other conditions, and the large-scale tube mill is greatly restricted. The roller press grinding system solves such problems well.

cement roller press
cement roller press

Specifications of cement roller press

Type Roller diameter Roller width Feed size output power
(mm) (mm) (mm) (t/h) (kW)
G140-80 1400 800 ≤65 290-360 2ⅹ250
G140-100 1400 1000 ≤65 350-420 2ⅹ560
G150-100 1500 1000 ≤70 420-500 2ⅹ710
G150-110 1500 1100 ≤70 460-550 2ⅹ710
G160-120 1600 1200 ≤75 590-680 2ⅹ900
G160-140 1600 1400 ≤75 690-780 2ⅹ1120
G170-100 1700 1000 ≤80 450-620 2ⅹ1000
G170-120 1700 1200 ≤80 630-730 2ⅹ1100
G180-100 1800 1000 ≤85 700-850 2ⅹ1000
G180-120 1800 1200 ≤85 850-1020 2ⅹ1200
G200-120 2000 1200 ≤90 950-1180 2ⅹ1600
G200-160 2000 1600 ≤90 1300-1580 2ⅹ1800

Working principle of cement roller press

The roller press works according to the principle of high-pressure layer pulverization, and adopts the work mode of single-grain pulverization. The brittle material is subjected to high pressure extrusion (the pressure of the machine in the pressure zone is about 150 MPa), the particle size of the material is rapidly reduced, the fine powder content of less than 0.08 mm reaches 20-30%, and the material of less than 2 mm reaches 70% or more, and a large number of cracks are present in all extruded materials, so that the energy required for the material to be ground in the next process is greatly reduced.

The main body of the roller press is two rollers that rotate in opposite directions, one is a fixed roller and the other is a movable roller. The brittle material is fed into the weighing chamber with the load cell by the conveying device, and then passes through the feeding device of the roller press into two rolls of the same size and opposite to each other, and the material is pulled into the nip by one side of the roller. The material is pressed into a dense material cake with high pressure, and finally falls from the nip, and is discharged from the hopper by the conveying device. The cake is further dispersed or ground by the next process.

Comparison of cement roller press and cement ball mill

Both the cement ball mill and the cement roller press have their own advantages and disadvantages, but in actual production, the cement roller press has the advantages that the ball mill does not have, mainly reflected in the following points.

  • High grinding efficiency, increasing production and energy saving. In the ball mill, the material is subjected to pressure and shear, which is the combined effect of these two forces. In a roller press, the material is only under pressure. Tests have shown that during the crushing process of the particulate material, the strain generated by applying onlypure pressure is equivalent to five times the strain generated by the shear force.
  • Reduce steel consumption. When grinding cement, the ball mill has a yield of 300~1000g/t, and the grinding system of the roller press has a yield of 0.5g/t, so it can meet the requirements of white cement.
  • Low noise. The ball mill noise is above 110 dB, while the roller press is about 80 dB.
  • Small size, light weight, small footprint, easy installation, and can be installed as a whole.

Note: Due to the large force of the roller of the roller press, the roller press has some problems, such as the material and the wear of the roller surface, the bearing is easily damaged, and the gear of the reducer is prematurely broken. In addition, the process operation process is strict. For example, the feed material column is required to be dense and full, and a certain feed pressure is maintained. The feed amount control should be appropriate, and the grinding process system configuration should be appropriate, otherwise its superiority cannot be exerted. 

cement grinding machine
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