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HC series large grinding mill is a new type of high-efficiency grinding equipment independently developed and innovated by Guilin Hongcheng on the basis of traditional Raymond mill. Its various technical indicators have been greatly improved compared with the R-type machine, and it is an ideal substitute for the traditional Raymond mill. The output of HC1700 is about 2.5 to 4 times higher than that of similar 5R equipment, effectively reducing energy consumption. The HC3000 model is currently the world's super large Raymond mill, which can meet the expanding industrial scale production demand, greatly improve the equipment efficiency, and the technology is at the top level in China. It is especially suitable for large-scale powder processing such as power plant desulfurization, manganese industry, coal powder, etc.
The machine is suitable for grinding limestone, calcite, talc, dolomite, quartz stone, bauxite, marble, feldspar, barite, phosphate rock, coal mine, clay, graphite, kaolin, wollastonite, lime, bentonite and other non-flammable and explosive materials with Mohs hardness of less than 7 and humidity of less than 6%.
The unique vertical pendulum structure increases the output by more than 40% compared with the R-type machine, and saves more than 30% of power consumption. The special feeding method is adopted to make the raw materials enter the grinding mill and distribute evenly, improve the rolling efficiency per unit weight and improve the output.
New damping technology, damping shaft sleeve is made of special rubber and wear-resistant material, which is more suitable for high frequency and heavy load impact and rolling conditions. Wearable parts are made of wear-resistant high-chromium alloy material technology, which has a long service life, nearly three times the industry standard.
It adopts large forced turbine classification technology, with large processing capacity and high classification efficiency. The grain size of the finished product is 80-400 mesh adjustable. At the same time, the gas sealing and blocking technology can be used, with high classification accuracy, to ensure the stability of the qualified rate of finished products.
It adopts the offline dust cleaning pulse dust collection system or the afterwind pulse dust collection system. The dust removal effect is strong, and the dust collection efficiency is up to 99.9%. All positive pressure parts of the host machine are sealed to basically achieve a dust-free processing workshop, which is more suitable for dust collection conditions with high dust concentration and large moisture content.
Frame-type integral base structure, strong seismic resistance and low noise. It avoids the cracking or damage of other components caused by the long time working vibration of the previous separated structure of the return air box and the base, and improves the stability and reliability of the equipment operation.
It adopts the grinding roller limit device to avoid the severe vibration of the mill due to material breaking. A new type of grinding roller sealing device is adopted, which is reliable and does not need a sealing fan, which further reduces the oxygen content in the mill and has excellent explosion suppression performance.
| Model | Number of grinding rollers | Nominal diameter of grinding ring(mm) | Maximum feeding size(mm) | Fineness(μm) | Capacity(t/h) | Power(kw) |
| HC800 | 3 | 800 | ≤15 | 38-180(80-400mesh) | 0.3-3 | 49.5 |
| HC1000 | 3/4 | 1000 | ≤20 | 1-5 | 101 | |
| HC1300 | 4/5 | 1300 | ≤30 | 2-9 | 198.5 | |
| HC1500 | 4 | 1500 | 6-13 | 286 | ||
| HC1700 | 5 | 1700 | 6-25 | 400 | ||
| HC1900 | 5 | 1900 | ≤40 | 10-35 | 597 | |
| HC2000 | 5 | 2000 | 10-45 | 745 | ||
| HC3000 | 4 | 3000 | 45-90 | 1832 |
Raw materials with suitable particle size are sent to the main machine through the feeding mechanism (vibration/belt/screw feeder or air-lock feeder, etc.). The high-speed rotating grinding rod is tightly rolled on the grinding ring under the action of centrifugal force. The material is scooped up by the blade and sent to the grinding area formed by the grinding unit and the grinding ring. The material is broken into powder under the action of the grinding pressure. Under the action of the fan, the pulverized materials are blown up and passed through the separator. Those that meet the fineness requirements pass through the separator. Those that fail to meet the requirements are stopped by the separator, and then returned to the grinding chamber for further grinding.
1. Closed circuit system: the qualified materials separated are blown into the cyclone collector through the pipeline. Through the action of cyclone, the material and gas are separated, and the collected material is sent to the next process through the discharge valve. The separated air flows into the main engine through the fan to participate in the next cycle. The excess air flow in the system is discharged into the atmosphere after passing through the pulse dust collector to ensure the stable operation of the system; The collection efficiency of the pulse dust collector reaches 99.99%, ensuring that the discharge meets the environmental protection standard.
2. Open-circuit system: the sorted qualified materials are blown into the pulse collector through the pipeline, and the material and gas are separated through the function of the filter bag. The collected materials are sent to the next process through the discharge valve. The separated air flow enters the exhaust pipe through the action of the fan and is discharged into the atmosphere. The collection efficiency of the pulse dust collector reaches 99.99%, ensuring that the discharge meets the environmental protection standard.
The discharge valve under the cyclone/pulse collector can be directly bagged and packaged by the packaging machine, directly loaded and transported by the bulk machine, and also sent to the finished product warehouse for storage through the conveying mechanism.
