The latest industry information
Kiln maintenance mainly includes kiln skinning, brick removal, cleaning and masonry. In order to shorten the kiln stop time as much as possible, kiln skin and brick removal are generally carried out after the lime kiln is cooled for 10-12 hours. At this time, the temperature in the kiln will still be above 90oC, so the kiln skin and brick removal are at high temperature and high temperature. In dusty environment.
According to common sense, it is generally undesirable to use diesel-driven equipment under high-temperature and high-dust conditions, because diesel engines are not resistant to high temperatures, and high dust will kill air filters and radiators, causing frequent failures and affecting bricking operations.
Affected by the size of the kiln door, the bridges are generally narrower. It is better to separate the machine when passing the bridge through the grate cooler. There are reports of malignant accidents in which a small excavator driving a bridge through a bridge and causing a man and a vehicle to fall into a castor cooler are reported at home and abroad.
Demolition of bricks and kiln skin are broken by hydraulic breakers. Inevitably, there are slag splashing and kiln skin collapse. In order to prevent the occurrence of personal safety accidents, it is hoped that the operator should stay away from the work surface and do not sit fixedly. It cannot be avoided on the machine.
In order to enter the smaller kiln door, but do not want to make additional modification to the kiln head cover, the width and height of the brick machine are required to be small and light weight. At the same time, the impact power of the hydraulic breaker must be large to complete the operation quickly, and the kiln head casting material must be hit.
Brick dismantling machine should be able to quickly remove bricks from the kiln skin, but not damage the cylinder. And this requires the stepless adjustment of the impact energy and frequency of the hydraulic hammer.
The design of the machine must consider the reliable operation under the condition of high temperature and high dust, the failure rate should be low, and the use cost is low. Therefore, it is a common international practice to stop using diesel-engineered construction machinery in lime kilns to remove bricks from kiln skins.
How to deal with the excessive wind of lime kiln grate cooler? Hongke Heavy Industries will provide you with detailed answers.
The cause and treatment method of the excessively high temperature of the residual wind of the lime kiln grate cooler.
(1) Raw meal running in lime kiln
When the raw material is running in the kiln, the material has a strong fluidity in the cooler, and the material is basically not agglomerated. It exchanges heat rapidly with the cooling air under the grate, causing the temperature of the residual air to rise rapidly. When this happens, the speed of the lime kiln should be greatly reduced, and the raw material feeding amount should be reduced. If the situation in the lime kiln is not particularly serious, it can be relieved by strengthening the kiln head calcination. If the situation is worse, the room should be greatly reduced. 1. The air volume of the two-chamber fan is stopped to prevent the grate bed from rotating to prevent the raw material powder from interfering with the flame in the lime kiln and to prevent the rapid flow of the raw material. When the situation improves, gradually increase the air volume of the first and second chambers to normal values. If the situation is more serious, stop burning.
(2) The incoming materials in the lime kiln are unstable
When the incoming materials in the lime kiln suddenly increase a lot, at this time, it is accompanied by poor calcination of the materials in the kiln, small clinker particles and more powdery materials, and the materials cannot be effectively cooled in the cooler, thereby causing residual air The wind temperature rises rapidly. Observe a large amount of red material from the observation port of the cooler. Due to the increase in materials and the thickening of the grate bed material layer, the speed of the grate bed should be appropriately increased, the air volume of the cooling fan under the grate should be increased, and the atomized cooling water in the cooler should be turned on in time. At this time, the wind temperature of the electric dust collection into the kiln head of the lime kiln should be strictly controlled to be less than 350 degrees. If there are too many incoming materials and the quality of the clinker is affected, it may be considered to reduce the speed of the lime kiln and strengthen the calcination in the kiln to ease the situation in the kiln. Should be based on solving the instability of incoming materials in the lime kiln.
(3) The cooling fan of the grate cooler trips
The cooling air volume of the cooler system is greatly reduced, resulting in the clinker can not be effectively cooled, so that the temperature of the residual air rises. Before the adjustment, the negative pressure of the lime kiln head is larger, the temperature in front of the kiln drops, and the lime kiln is dark red in anoxic state.