Limonite rotary kiln has simple structure, convenient and reliable production process control, less vulnerable parts and high operation rate. The limonite rotary kiln produced by our factory has strong structure, smooth operation, high quality of kiln products, and can provide users with high-efficiency vertical drum preheater and five-stage cyclone preheater. The head cover of the limonite rotary kiln adopts a large volume method, and the structure of the kiln door is opposite, which makes the air flow more stable. The seal of kiln head and kiln tail adopts the double seal form of radial friction labyrinth and fish scale, which has simple structure and convenient maintenance.
Performance characteristics of limonite rotary kiln
Limonite rotary kiln dries materials of certain humidity or granularity in mineral processing, building materials, metallurgy, chemical industry and other departments. Rotary kiln is widely used because of its strong adaptability to materials, its ability to dry various materials and its simple and reliable operation.
Fuel for calcining limonite in rotary kiln
According to its state, it can be divided into: 1. solid fuels, such as coal and coke; 2. liquid fuels, such as heavy oil, kerosene and diesel oil; 3. gas fuels, such as liquefied petroleum gas, producer gas, natural gas, etc.
Working principle of limonite rotary kiln
Pulverized coal with particle size less than 10 mm and moisture less than 15% is mixed with 0-8% by weight to enter the rotary kiln; limonite fines are dried, magnetized, arsenic removed and desulfurized in the same rotary kiln, and the rotary kiln rotates at a speed of 0.8-1.5 rpm; the roasting zone temperature of the rotary kiln is 800 +150 C, and the drying zone temperature is 350. The temperature is (+) 80 C.
The roasting ore is cooled by water after the treatment of step 1. After cooling, the roasting ore is classified by classifier, the sand is separated by magnetic pulley, and the overflow is sent to the wet weak magnetic separator by the concentrated pump for magnetic separation. The magnetic part is the product iron concentrate. The low iron grade high arsenic sulfur impurity limonite powder ore is blended with coal, dried and roasted, magnetized and removed arsenic and sulfur impurities in the same kiln. The process is simplified. The roasted ore is magnetic separation after quenching water grading, and the magnetite concentrate with high iron grade, low arsenic and sulfur impurities is obtained after magnetic separation. Beneficiation of ore and waste residue.