Metallurgical rotary kiln equipment Electromagnetic heating or natural gas heating system

Metallurgical rotary kiln equipment introduction

Metallurgical rotary kiln is mainly used for magnetization roasting of lean iron ore in steel plants in the metallurgical industry; oxidation roasting of chromium and nickel iron ore. It is widely used in metallurgy, chemical industry, building materials, etc. The kiln body is rolled with carbon steel or alloy steel plate and automatically welded, and the wheel belt, support wheel and open gear are made of alloy cast steel.

Metallurgical rotary kiln structure composition and instructions for use

Metallurgical rotary kiln consists of slag discharge port, flow ring, gear ring, front end plate, kiln head, kiln tail, front bearing seat, reduction box and other structures.

Instructions for use of metallurgical rotary kiln:

1. Preparation work before opening the kiln and igniting:

(1) Check whether the sealing device is complete and reliable, whether the connection is tight, and prevent air leakage:

(2) Check whether the blower gate switch and the air door position are suitable and easy to use;

(3) Check whether the transmission part, support wheel, and retaining wheel are intact;

(4) Check whether the front and rear auxiliary machines are normal;

(5) Check whether the raw material powder and coal powder are sufficient.

2. All newly built kiln linings must be baked. During the kiln baking process, the kiln must be rotated 1/4 circle every half an hour to prevent the kiln body from bending and to make the kiln lining surface evenly heated.

3. It is strictly forbidden to stand on the kiln mouth platform during ignition. The fan can only be started after people leave the platform to avoid backfire and injury.

4. When the equipment is running, the rotating parts should be checked frequently for abnormal sounds such as vibration, impact, friction, etc., whether the gear meshing is normal, and whether the bearing temperature exceeds the allowable range.

5. When the equipment is running, check whether the readings of each instrument are within the specified range and whether the indicator lights are normal.

6. Before stopping the kiln temporarily, keep the raw material away from the kiln head, and leave a section for the material to move when the kiln is turned after stopping the kiln, so as to prevent the raw material from getting close to the kiln head, which is not conducive to opening the kiln and igniting. After stopping the kiln, turn the kiln regularly to prevent the cylinder from bending and deforming.

7. Before stopping the kiln for major and medium repairs, use up the materials in the feed bin and the fuel in the coal bin, and empty the materials in the kiln. After stopping the kiln, the kiln temperature is still high, and the kiln is turned regularly to prevent the cylinder from bending and deforming.

8. After stopping the kiln, all speed regulating devices are reset to zero to prevent the electrical equipment from being damaged due to excessive starting current shock.

9. When the equipment is running, check the up and down movement of the kiln frequently, control the cylinder to make regular reciprocating motion between the upper and lower stop wheels, and reciprocate once per shift. If there is any abnormality, adjust the support wheel in time.

10. Check the lubrication of the equipment frequently and add lubricant regularly according to the requirements.

11. When the equipment is under maintenance, the power supply should be cut off and a warning sign "Stop for maintenance, no closing of the switch" should be hung. After the maintenance is completed, a full inspection should be carried out. After the person in charge of the maintenance confirms that there is no problem, the switch can be closed and started.

12. The machine body should be kept clean, and no debris or dust should be allowed around it.

Working principle of metallurgical rotary kiln
When the metallurgical rotary kiln is operating normally, the main drive motor transmits power to the open gear device through the main reducer to drive the rotary kiln. The material enters the kiln from the kiln tail for calcination. Due to the tilting and slow rotation of the cylinder, the material rolls in the circumferential direction and moves in the axial direction. The mature material enters the cooler through the kiln head cover for cooling. The fuel is sprayed into the kiln from the kiln head, and the exhaust gas generated by the combustion is exchanged with the material and then discharged from the kiln tail.