The system of blast furnace pulverized coal has been widely used in Electric Power, Steel and Metallurgical industry etc. In the whole system, the preparation of pulverized coal is the most important step. Common mill cant satisfy the needs of pulverized coal due to its high demand and big capacity. So more and more customers are inclined to large-scale coal mill.
Now in China, we have more than 2 million boilers need transform. It has become a hot topic for the heating system that how to improve the efficiency of Pulverized coal fired boiler. After the renovation, the efficiency will be highly improved, and the pollutant will be sharply decreased. The Desulphurization, denigration and dust removal device can be installed in integration.
Using kiln calcine calcium lime, has a long history around the world. At present, with the development of metallurgy, chemical and building materials industries, the demand for lime powder is still increasing, while the quality requirement is more and more high. The needs of pulverized coal for modern limekilns development gets higher and higher, and also puts forward higher requirements on pulverized coal processing equipment.
Generally, coal activated carbon is formed by powdery material and adhesive after kneading and extruding, then through the processes of carbonization and activation etc. With the advantages of developed pore structure, good adsorption properties, high mechanical strength, easy to repeated regeneration, low cost etc, widely use in Toxic gas purification, waste gas treatment, industrial and domestic water purification treatment, solvent recovery.
We have made much introduction about characteristics of LM vertical grinding mill, such as fully function, simple system, tight layout and reliable products. In addition to the performance and capacity of the equipment, people have more requirements about the safety and environmental protection production. Here is the example of pulverized coal production to introduce the outstanding performance in these two aspects.
The pulverized coal is flammable. When having a certain density, it can explode under the effect of high temperature, collision, friction, vibration, naked flame and electric spark. In the production system, the pulverized coal is transported by the gas, which mixes with the pulverized coal may produce spark and much pressure to induce the danger of explosion. In order to eliminate the hazards and achieve safety production, we take the explosion of pulverized coal production process into full consideration and set special explosion-proof point for LM grinding mill to release the inner pressure, which will make the inner air pressure achieve balance at any time.
The overflow may happen in most of the pulverized coal production site. The operators are easy to cause pneumoconiosis and other occupational diseases if they do not wear professional protecting appliance. To avoid the waste of resources caused by pulverized coal spillovers and the harm brought to the staff on the site, the equipment structure adopts totally-enclosed design and runs under negative pressure. In this way, the problem of dust pollution will be solved thoroughly. On the one hand, it ensures sanitary cleanup of the site and health of the staff; on the other hand, the characteristics of energy-saving, environmental-protection and no pollution make the production line live up to the national environmental-protection standards.
Nowadays, Peoples awareness of safety and environmental protection is gradually strengthening; the investors concerning degree to the equipment is also increasing. The LM vertical grinding mill has become the best choice for pulverized coal production. It also improves the safety and environmental protection of the production process while ensuring the quality and production efficiency. It is the best performance and most comprehensive equipment of pulverized coal mills.
As a new type of superfine grinding equipment, the LUM ultrafine vertical roller mill integrates powder grinding, separation and transportation. With years experience in mill production, the LUM ultrafine vertical roller mill are designed by our company, basing on vertical mills, we introduce Taiwans grinding roller technology and Germany powder separating technology.
As a professional medium and high-end processing equipment in plastic master batch, PVC, artificial stone, electric cable, non-woven fabrics and other industriesLUM Series Ultrafine Vertical Grinding Mill is mainly used for the ultrafine grinding of calcite, marble, limestone, talc, dolomite, barite, kaolin, wollastonite, gypsum, feldspar, pyrophylite and other non-metallic mineral ores.
The grinding curves of the roller shell and lining plate are uniquely designed based on the ultrafine pulverization principle, which makes it easier to form material bed, improving the grinding efficiency and increasing the proportion of finished products from the primary grinding.
According to the material bed pulverization principle, the materials stay a short time in the mill to reduce the repeated grinding.As a result, the iron content in the finished products is low and the whiteness and purity of the product are high
By adopting PLC control system, major parameters like grinding pressure, rotating speed of grinding disc and speed of classifier etc. can be accurately controlled to achieve accurate cutting size and stable quality.
Thanks to the use of ultrafine pulverization and multi-rotor separation, LUM series ultrafine vertical grinding mill saves energy by 30% to 50% compared to a common type mill when producing the powder of the same fineness, which achieves better economic effects.
The whole equipment is well sealed and the system operates under negative pressure. Therefore, powder and dust are prevented from flowing out of the system. It is environmentally-friendly and meets the national environmental protection requirements.
The materials drop on the grinding plate center through the screw feeder and evenly move outwards under the action of centrifugal force of the rotating grinding plate driven by the reducer; Large materials are crushed and ground by the grinding rollers when passing through the grinding area, while smaller materials form a material bed by extrusion for further inter granular crushing. The crushed materials continue to move towards the mill edge until being taken into the classifier by the air flow from the air inlet.
The powder particles failing to meet the particle size requirement fall back on the grinding plate for further grinding while the qualified powder particles are collected in the pulse dust collector with the air flow and discharged as finished products. However, the iron blocks and other sundries mixed in the materials move along with the materials towards the edge of the grinding plate due to their own weight. They fall into the lower chamber of the mill and then be discharged out of the mill through the slag discharge opening by the scraping plate.