Cement production technology
Because of the rotary kiln has certain gradient (rotary kiln), and raw material particles rolling, the biggest direction down along the slope, thus moving forward the distance. When raw material movement in the stove, the raw material of particle movement way of cyclical change, or buried in upward movement with the kiln material layer, or layer to the material on the surface and down. But only in the process of raw material particles along the land surface, it can be along the furnace length direction. Raw material in the case of innovation movement will affect the raw material in the furnace of the residence time (i.e., time for heating the raw material); The filling coefficient of raw materials in the furnace (that is, the material heated area); Raw material granularity, flip, also affect the uniformity of raw material (i.e., affect the surface temperature of the combustion products and raw materials). All kinds of sports conditions on the influence of the central Angle, that is, to the filling coefficient of material, must be attention.
(1) rotary kiln, rotary kiln combustion equipment and pulverized coal combustion heat therein; As well as heat transfer equipment, raw materials absorb the heat of the gas for calcination. Sometimes other conveying equipment, from raw material feeding end to discharging end. And fuel combustion, heat transfer and the movement of raw materials must be reasonable and collaboration between the three, to make the heat generated by the fuel combustion can in raw material by rotary kiln, rotary kiln in a timely manner to the raw material, has reached the purpose of high-yield, high-quality, low consumption. (2) raw material movement in the particles in the rotary kiln, rotary kiln is more complicated. If the raw material particles on the kiln wall and the raw materials inside the layer without sliding phenomenon, raw material movement is often thought to be like this: raw materials under the action of friction, as a whole with the kiln wall rises slowly, when transferred to a certain height, the raw material layer surface and the horizontal plane Angle is equal to the Angle of the accumulation of raw materials, raw materials particles under the action of gravity, slipped along the bed
Firing equipment of cement shaft kiln, wet rotary kiln, rotary kiln and ordinary insulating dry kiln, vertical Bohr kiln and preheater kiln (SP) and the current widespread use of the new dry rotary kiln, rotary kiln. Rotary kiln, rotary kiln is a cylinder has a certain slope, slope is 3 ~ 3.5%, with the help of a kiln rotation to promote material stirring in rotary kiln, rotary kiln, the material mixing, contact each other for reaction. Kiln head pulverized coal combustion produces a large amount of heat, heat with the flame radiation, heat convection, brick kiln, kiln conduction to the material. Material depend on kiln shell Angle rotation in the kiln and kiln movement forward..
