Raymond limestone grinding mill plays a vital role in the preparation of desulfurized limestone powder. The quality of Raymond limestone grinding mill directly affects the quality, fineness and particle size distribution of limestone powder. The following will explain the technical characteristics and specific applications of Raymond limestone grinding mill in desulfurization limestone grinding.
1. The great significance of the application of Raymond limestone mill in desulfurization limestone powder making
Yesterday, the first China Mathematics Carbon Neutral Summit Forum was held in Chengdu, which triggered global attention to “green development”. As China ranks first in SO2 emissions, it is urgent to control SO2 emissions from key industries such as thermal power plants and coal-fired boilers.
At present, more than 90% of domestic thermal power plants use limestone-gypsum desulfurization technology. The technology is mature and the cost is low. Both processes require the use of limestone powder to absorb sulfur dioxide, and the smaller the particle size of the limestone powder, the more conducive it is to the absorption of SO2.
(1) Quality of limestone
Generally speaking, the CaSO4 content in limestone should be higher than 85%. If the content is too low, it will cause some problems in operation due to more impurities. The quality of limestone is determined by the content of CaO. The higher the purity of the limestone, the better the desulfurization efficiency. But limestone does not necessarily have a higher CaO content, the better. For example, limestone with CaO>54% has high purity and marble is not easy to grind and has strong chemical stability, so it is not suitable for use as a desulfurization agent.
(2) Limestone particle size (fineness)
The size of the limestone particle size directly affects the reaction speed. When the surface area is larger, the reaction speed is faster and the reaction is more complete. Therefore, the usually required limestone powder can pass through a 250 mesh sieve or a 325 mesh sieve, and the screening rate can reach 90%.
(3) Effect of limestone reactivity on desulfurization system performance
Limestone with higher activity can achieve higher sulfur dioxide removal efficiency while maintaining the same limestone utilization rate. The reactivity of limestone is high, and the utilization rate of limestone is also high. The excess CaCO in gypsum is low, that is, the purity of gypsum is high.
3. Working principle of Raymond limestone grinding mill
Raymond limestone grinding mill consists of grinding host, classification screening, product collection and other components. The main unit adopts an integral cast base structure, which can be used as a shock-absorbing foundation. The classification system adopts a forced turbine classifier structure, and the collection system adopts pulse collection.
(1) Working principle of Raymond limestone grinding mill
The material is crushed into a particle size that meets the specifications by the jaw crusher, lifted to the storage hopper by the bucket elevator, and then quantitatively fed into the main chamber by the feeder for grinding. The grinding roller device supported on the plum blossom frame in the main machine cavity rotates around the central axis. The grinding roller swings horizontally outward under the action of centrifugal force, so that the grinding roller presses the grinding ring and the grinding roller rotates around the grinding roller axis at the same time. The material raised by the rotating blade is thrown between the grinding roller and the grinding ring, and is crushed and grinded by the grinding roller.
(2) Working process of powder selector of Raymond limestone mill
The ground powder is blown by the airflow of the blower to the classifier above the main machine for sieving. The powder that is too fine and coarse will still fall into the main machine for re-grinding, and the powder that meets the specifications will flow into the cyclone collector with the wind. After collection, the finished product is discharged through the powder discharge pipe (the particle size of the finished product can be as high as 0.008mm). The purified airflow flows into the blower through the pipe at the upper end of the cyclone. The air path is circulating. Except for the positive pressure from the blower to the grinding chamber, the air flow in the other pipelines flows under negative pressure. The indoor sanitary conditions are good.
4. Technical characteristics of Raymond limestone grinding mill
Guilin Hongcheng Raymond limestone grinding mill is a technical update based on the R-type grinding mill. The technical indicators of this product have been greatly improved compared to the same period of the R-type grinding mill. It is a new type of grinding mill product with high efficiency and energy saving. The fineness of the finished product can be adjusted arbitrarily between 22-180μm (80-600 mesh).
(1) (New technology) The plum blossom frame and longitudinal swing grinding roller device have advanced and reasonable structures. The machine has very little vibration, low noise, smooth mechanical operation and reliable performance.
(2) The processing volume of materials per unit grinding time is larger and the efficiency is higher. The output increased by more than 40% year-on-year, and the unit power consumption cost was saved by more than 30%.
(3) The residual air outlet of the grinding mill is equipped with a pulse dust collector, whose dust collection efficiency reaches 99.9%.
(4) Adopting a new sealing structure design, the grinding roller device can be filled with grease once every 300-500 hours.
(5) Using unique wear-resistant high-chromium alloy material technology, it is more suitable for high-frequency, large-load collision and rolling conditions, and the service life is nearly three times longer than the industry standard.
In summary, compared with traditional Raymond mill, suspension roller mill, ball mill and other processes, the use of Raymond limestone mill can reduce energy consumption by 20% to 30%, which can improve the preparation of environmentally friendly desulfurized limestone powder. If you want to know more about Raymond limestone grinding mill, you can leave a private message or click on the avatar to contact us, email address:hcmkt@hcmilling.com
Post time: Sep-27-2023
