Rotary Kiln Process’s Drive Current Variation

Power: 22-55 kw

Capacity: 12-35 t/h

Application: calcining cement, lime and irons.

We all know that rotary kiln is driven by the current. So by watching the current’s variation, we can conclude some different situations with the rotary kiln. AGICO’s experts tell you some rotary kiln sector secrets during the rotary kiln process.

CASE ONE

The kiln drive current increases from straight up, indicating that the amount of material in the kiln increases or the temperature in the kiln increases. The distinguishing method is to calculate the heat consumption at that time based on the kiln feeding amount and the total coal consumption of the system at that time. If the heat consumption is not high, it means that the kiln skin is thick or the small strands collapse. As long as the feed rate of the system is stable, pay attention to observe that there is no need to change the kiln speed. If the heat consumption is too high, then add some feed or reduce the coal at the kiln head. The temperature in the kiln will soon return to normal, and the kiln drive current will also be flat.

CASE TWO

After the kiln drives current suddenly rises from straight to upward, it slowly decreases and tends to be flat again, indicating that the thick kiln skin or knot in the kiln collapses evenly and the amount is relatively large. The falling kiln skin or knotted material is carried along with the kiln rotation, and the kiln transmission torque increases, so the kiln transmission current suddenly increases. However, with the rotation of the kiln, the collapsed materials gradually dispersed, so the current slowly fell and became stable. This situation is normal, but attention should be paid to the simplified surface temperature of the kiln to prevent local high temperatures, especially when the kiln lining is thin, the red kiln is prone to occur.

CASE THREE

The kiln drive current suddenly decreased from flat to slow and then slowly decreased, indicating that the kiln ring collapsed and fell into the cooling machine. In this case, for the kiln, the speed of the kiln should be greatly reduced to avoid the material flowing forward after the circle and raw material to run; for the cooler, the grate speed should be mainly accelerated to prevent the overload of one grate plate and increase The volume of air in the chamber and then in the second chamber rapidly quenches and ruptures the bulk material. The grate speed should be reduced when the clinker is approaching the clinker crusher, so that the remaining large pieces of clinker can pass through the crusher smoothly and safely.

CASE FOUR

The kiln drive current goes straight down, which means that the load rate of the material in the kiln is reduced or the temperature in the kiln is reduced, resulting in a reduction in the torque of the kiln. At this time, it is necessary to check whether the kiln speed is too fast or whether the amount of coal fed is compatible with the amount of feed, and calculate the heat consumption of firing before taking corresponding measures.

CASE FIVE

The kiln drive current tends to be flat after large fluctuations, indicating that the half or part of the kiln is looped or thick kiln skin, resulting in unstable kiln transmission. The current fluctuation is large, and then the circle or thick kiln skin is full, so the current It has stabilized again.