Rotary kiln direct reduction method is based on continuous rotation of a rotary kiln for the reactor to solid carbon as a reducing agent, the reduction reaction by solid-phase iron ore direct reduction iron Tempered methods. Rotary kiln direct reduction is carried out at 950 ~ 1100 ℃ solid-phase carbon reduction, kiln thin material, there is considerable free space for the free flow unhindered escape of high temperature kiln, containing beneficial Iron ore symbiosis achieve selective reduction and gasification of low temperature gaseous elements and oxides, and then be recycled to achieve the comprehensive utilization of resources. As the reduction temperature is low, the ore gangue are retained in the product, not fully carburizing. Since loss of oxygen to form a large number of micro-reducing pores, microscopic sponge-like products, it is also known as sponge iron. Iron ore (including oxide pellets), reduction and combustion of coal and coal-based sorbent is direct reduction rotary kiln production of the main raw material, is the material basis for the production of direct reduction. The quality of raw materials not only for the direct reduction of production efficiency, product quality and energy consumption has a direct impact on technical and economic indicators, but also determines the success or failure of the direct reduction process. Therefore, good selection and processing of raw materials preparation is very important to the production of direct reduced basic work is the ability to produce direct reduced iron key. Rotary kiln for the production of direct reduction of iron ore raw materials may be natural (i.e., lumps), it can be oxidized pellet. Determine the quality of iron-containing materials are the main factors: chemical composition, physical properties and metallurgical properties. Suitable for the production of rotary kiln direct reduction of iron ore to be: high iron content, gangue content of less harmful impurities, stable chemical composition, particle size suitable, and has good resistance and a certain degree of strength reduction. Coal is the rotary kiln DRI production indispensable raw materials, which is coal-based direct reduction of the reducing agent and heating fuels. Coal Quality on rotary kiln direct reduction process to produce a result, have a significant economic impact. Good choice of coal production in the rotary kiln direct reduction of crucial important prerequisite. The above article by Henan YuFeng Heavy Machinery (http://www.yufchina.com) special finishing release, reproduced, please indicate the source!