Impurities in the lime kiln in this life reaction occurs in the calcination process can be part of the calcium oxide with other compounds, the composition of the lime also contain other minerals, calcium oxide particles, or the slag film wrapped, reduced lime degree of activity. In the metallurgical industry, the metallurgical lime required to have a high degree of activity and low sulfur content. A direct influence on the activity of lime quality of the product. Limestone used in the production of lime into the plant is stored in the limestone quarry. When used with a loader into the limestone silo, after screening, 20 ~ 40mm limestone feeding by weighing loaded after twelve car preheater preheating chamber (second by the belt transport, weighing the belt called). In about 30% of the preheater limestone is broken down, and then by the hydraulic device driver Tuitou other week in and week will be preheated by the transporter chute into the limestone calcined lime kiln, rotary kiln rotates the material sent , calcined lime falls into a good cooler. Lime bottom secondary air cooling, while the cold air as the combustion air is preheated. Cooling to 100 ℃ of lime through the chain plate, bucket, belt into the finished screen product, less than 3mm gray powder directly into the ash bin. 3 ~ 10mm crushed into small pieces of gray ash bin. Greater than 10mm block gray ash silo into the block. 2 # lime in the ash silo block from the car to give steelmaking, 3 # finished ash silo by a belt to the steelmaking converter. Please indicate Henan YuFeng Heavy Machinery (http://www.yufchina.com)