China Cost of Lime Processing Plant

Product description
Lime Rotary Kiln advanced structure, reliable rotary kiln lime kiln sealed at both ends combined scales. Air leakage coefficient is less than 10% of the composite refractory material, in order to reduce radiation heat loss.
The metallurgical roasting equipment is composed of the kiln head, kiln body and kiln tail. Among which, the kiln head is mainly used to discharge, with larger diameter than the kiln body. The kiln body is the main component, which is usually as long as 30-150m. In addition, the kiln tail, the significant part of Features.
The new type metallurgical rotary kiln is simply constructed and presents a large variety of superiorities such as easy and reliable operation, little quick-wear parts, high operation rate, and premium finished products.Process description
Qualified limestone (20 ~ 50 mm) are lifted by bucket elevator to top silo of preheater. There are two level indicators (up and down) controlling the feeding amount, then they are separated averagely into preheaters' individual rooms. The limestone's temperature rises to about 900ºC heated by kiln flue gas of 1150ºC, about 30% of them are decomposed, and they come into the rotary kiln by hydraulic rod, where the limestone decomposed into CaO and CO2. The decomposed limestone are put into the cooler, where its temperatures drops to 100ºC and released. The hot air (600°C) will come to kiln after heat exchange, and mix with coal gas for mixture combustion. The exhaust gas is released by the blower into bag deduster through multi-pipe cooler, then into the chimney though exhaust blower.The limestone from the cooler will be transported to the limestone final product silo through vibrating feeder, chain conveyer, bucket elevator, belt conveyer.

Application for Active Lime Rotary Kiln:
The metallurgical rotary kiln is mainly used in metallurgy industry for roasting various mineral materials. To be specific, it can be used in steel plants for magnetizing roast of lean iron ore and oxidizing roast of chromite and josephinite, in refractory material factory for roasting high metallurgical minerals, in aluminum plants for roasting clinkers and aluminium hydroxide, and in chemical plants for roasting aluminum ore sand, chrome ore powder, etc.
Structural Characteristics for Active Lime Rotary Kiln:
1. The kiln body is made of premium carbon steel or alloy steel plate by means of rolling and automatic welding.
2. The tyres, riding wheel and open gear of this roasting furnace are made of alloy cast steel.
3. The slide shoe bearing features large gap and impossibility of grinding the shoe.
4. The cylindrical roasting kiln is designed with a special driving device which consists of a hard teeth reducer, a flexible diaphragm coupler and a direct current motor.
5. A hydraulic thrust roller is typically adopted.
6. The kiln head and tail are respectively characterized by metal leaf type seal and air-tight seal.
7. The metallurgical rotary kiln is equipped with a low speed driving device.

Main advantages of lime plant/lime production line
1. Good quality and high output, suitable for large-scale activity of lime production line and large-scale production.
2. Stable production, all the production with the negative pressure, air flow and higher security.
3. Simple structure, easy control and beneficial operation and maintenance.
4. Fine grade limestone can be calcined, full use of mine resources.
5. Low heat consumption per unit of product, installation in vertical kiln perheated kiln can take advantage of exhaust warm limestone, greatly reducing the fuel consumption.
6. Making full use of industrial waste gas as a fuel for lime burning (such as blast furnace exhaust gas, acetylene tail gas, charcoal blue exhaust, etc)
7. Kiln head adopts the design of vertical cooler integrating kiln head cover. The construction area is small, good sealing, effectively avoiding hot waste gas emissions unsystematically.
8. Environmental protection, the adoption of pulse bag filter dust collecting dust, discharge concentration less than 50mg Nm³ / and below national emission standard (less than 100mg/Nm³ )
9. High automation level, the adjustment of production system operation, control and alarm adopts PLC to control in the control centre room, reducing artificial and improving efficiency.
Specifications


Projects
In 2014 , a building material factory from guangxi province of China purchased a lime production line with annual output of 400,000 tons. The main equipment includes φ4.0x60m rotary kiln, φ2.4x4.75m coal mill, 5000 m² bag type dust collector. And all of these equipment were made by CHAENG independently, and CHAENG provided installation and commissioning guidance.



about CHAENG
Founded in 1958 and located in Xinxiang, Henan province, CHAENG with 60-year experience in equipment manufacturing covers an area of 330,000 m2 and its annual production value is 1 billion yuan. The company specializes in manufacturing tube mills, rotary kilns, vertical mills and large steel casting and can undertake the EPC projects of cement production lines, active lime production lines, blast furnace slag/ steel slag/ nickel slag grinding plants, and its products are sold to more than 50 countries and regions in Southeast Asia, Central Asia, South Asia, North America, South America and Europe.
Our long-term strategic partners: Arcelor Mittal, Tata Group, Pohang Iron and Steel Company, Germany CCE, Japan Chiba , Shanghai Baosteel, Voestalpine and ASGT.