What should I do with the rotary kiln ring? Causes of rotary kiln ringing Causes of rotary kiln ring

When the front ring is not high, it has little impact on the calcination operation, but when the current ring is high, it not only affects the fire operation, but also affects the ventilation and flame shape in the kiln. At this time, the air coal or mobile coal injection pipe should be adjusted and dealt with in time.

1) If the position of the front ring is far away from the discharge port, most of them are in the good condition of the kiln skin, the calcination is normal, the position of the high temperature zone is appropriate, and the coal injection pipe is in the inside for a long time. During processing, the exhaust can be turned off without turning off the exhaust and reducing the feeding amount, and it can be burned as long as the coal injection pipe is pulled out.

2) The position of the front ring is close to the discharge port, mostly due to the poor condition of the kiln skin, the flame is too long, and the circle formed when the coal injection pipe is outside for a long time. There are two types of operation: one is the operation without reducing the feed. When the incoming material is less, pull out the coal injection pipe and raise it at the same time.

The primary and secondary air temperature and the secondary air volume are increased, the tail temperature is controlled at the lower limit, the firing temperature is increased, the firing zone is moved forward, and the fire point falls on the circle and is gradually burned off. During the operation, the amount of coal should be added or decreased in time, the amount of incoming materials and the change of flame should be mastered, and the flame elongation or compression should be adjusted in time to prevent damage to the kiln skin and lightly burned products out of the kiln; The second is the operation of reducing feeding. Appropriately reduce the amount of feeding, reduce the secondary air volume, when the tail temperature is low, pull the coal injection pipe to the outermost, and after the pre-burned poor materials enter the firing belt, the flame can be shortened and forced calcination can be shortened, so that the front ring is burned off by strong fire.

This method is forced when the injection pipe cannot be burned. Due to the excessive pulling out of the coal injection pipe, coupled with the fact that the raw meal is very close, the black flame is very short, and it is impossible to maintain the normal flame shape.

1. First of all, it is necessary to carry out reasonable screening of calcined raw materials and clean up the materials entering the kiln, so as to achieve a certain degree of cleanliness and reduce the amount of attached substances. Ensure the smooth operation of the equipment during the calcination process.

2. Attention should also be paid to the selection of high-quality coal with high melting point, less burning dust and higher heat. This can not only improve the production efficiency of the rotary kiln, ensure the temperature of the material in the calcination process, but also enable the raw meal to be fully calcined. If the quality of the selected pulverized coal is not good or the combustion is not thorough enough, there may be unburned pulverized coal in the kiln, causing the ring of the rotary kiln to slowly thicken.

3. It is necessary to standardize the operation of the rotary kiln, stabilize the internal temperature, control the fineness of pulverized coal, and reduce the occurrence of incomplete combustion caused by excessive coal consumption or insufficient air volume. Control the moisture of pulverized coal, fully dry the pulverized coal into the kiln, so that the moisture in the pulverized coal can be reduced, which can prolong the time of ringing.

4. In the process of calcining materials in the rotary kiln, the operator should strictly follow the operation steps to reduce the problems caused by insufficient feeding or speed mismatch. In this way, the problem of thickening of the ring in the rotary kiln can be well reduced. When it is found that there is a problem of rotary kiln ringing, it can be solved in time, which can not only reduce the thickening of the ring, but also ensure the reasonable and effective operation of the equipment.

Generally speaking, the main reasons for the formation of circles in the rotary kiln are as follows: The composition of the raw meal entering the kiln fluctuates greatly, and the feeding volume is unstable, which will inevitably cause the disorder of the thermal system in the kiln. When the composition is high and the feeding amount is large, it is necessary to add the first coal, increase the firing temperature, and even reduce the kiln speed, when the composition is low or the feeding amount is small, the operation can not be adjusted in time, the temperature of the firing belt is too high, the material is too hot and sticky, and it is easy to form a long and thick kiln skin, and then form a clinker ring.

Effects of harmful ingredients. The content of R2O and SO3 is high, and it is easy to form sulfur-alkali circles. When the MGO is high, especially when it is larger, the liquid phase of clinker can be greatly increased, the liquid phase viscosity decreases, the clinker sintering range narrows, and the kiln skin thickens to form a clinker ring.

Effect of pulverized coal quality. Coal dust with high ash content, coarse fineness and large moisture is easy to produce incomplete combustion, and the coal ash settlement is relatively concentrated, and it is easy to form a clinker ring. In addition, the amount of coal fed is unstable, so that the temperature in the kiln is high and low, and it is easy to form circles.

When there is a problem of circle formation in the rotary kiln, check whether the banquet is caused by the following reasons: 1. The raw material composition in the rotary kiln fluctuates greatly, and the feeding volume is unstable, resulting in chaos and chaos in the thermal system in the kiln; 2. Whether the raw materials contain harmful ingredients. Such as:

Whether it contains a large amount of R2O and SO3 to cause sulfur alkali rings, whether it contains mgo content and high content will produce clinker rings, etc.; 3. The influence of pulverized coal quality; 4. The temperature in the kiln is unstable and it is easy to form circles. There are two conditions that should be met for the ring of rotary kiln, one is the appearance of a certain viscosity of the night body, and the other is the temperature difference between the flue gas, the material and the lining. When we understand the reasons for the rotary kiln Zhaoxiang file ring, we have to find a way to solve it, and the most direct methods are as follows:

1. Sieve the raw materials before they enter the rotary kiln to ensure the cleanliness of the period and reduce the content of liquid-phase substances; 2. Choose coal with high ash melting point, high calorific value and high volatility.

Summary. Good morning, dear, there are many possible reasons for the circle at the end of the rotary kiln, and the following are some common reasons: uneven raw material composition:

In the kiln tail area, the raw material will be affected by high temperature and rotation after entering the kiln, and if the raw material composition is uneven, it may lead to the formation of kiln tail circles. Kiln tail temperature is too high: The kiln tail area is the hottest place in the kiln, and if the temperature is too high, it may cause the raw material to form a loop.

Good morning, dear, there are many reasons for the end of the rotary kiln to grind the energy, the following are some common reasons: uneven raw material composition: in the kiln tail area, the raw materials will be affected by high temperature and rotation after entering the kiln, such as the uneven composition of the raw materials of the tomb shed douguo, which may lead to the formation of the kiln tail circle.

Kiln tail temperature is too high: The kiln tail area is the hottest place in the kiln, if the temperature is too high, it may cause the raw material and shirt to form a circle.

The kiln tail area is where the flue gas in the kiln is discharged, and if the exhaust is not smooth, the dust and particulate matter in the flue gas may accumulate in the kiln tail area and form a circle.

A high burn-out rate in the kiln tail area may lead to the formation of kiln tail rings.

Qinhaochang's methods to solve the kiln tail ring include adjusting the raw material composition, Youyou Sui Kiln Tail temperature control, cleaning the flue gas emission pipeline in the kiln tail area, and controlling the kiln tail burn loss rate and burial.

Dear, hello, the reason for the end of the rotary kiln is as follows: 1Improper operation:

In the process of operation, if the operator is not familiar with the operation procedures of the rotary kiln, or the operation is not standardized, it is easy to lead to the occurrence of kiln tail ringing. For example, too fast feeding, uneven feeding, and too thick material layer will increase the risk of kiln tail ringing. 2.

Blockage at the end of the kiln: When the discharge port of the rotary kiln is blocked by the material, it will cause the material layer to accumulate at the end of the kiln, forming a circle. This is caused by the high humidity of the material, the uneven particle size of the material, and the change of the nature of the material.

3.Poor cooling of the kiln tail: The kiln tail area of the rotary kiln is usually cooled by the cooling device, if the cooling device fails or the cooling effect is not good, the temperature of the kiln tail is too high, and it is easy to cause circles.

In order to solve the problem of ring at the end of the rotary kiln, the following measures can be taken: 1Strengthen operational training:

Train operators to improve their familiarity with the operating procedures of rotary kilns and ensure that the operation is standardized. 2.Control the feed speed:

The bridge reasonably controls the feeding speed to avoid too fast or uneven feeding, and guesses the chain to reduce the risk of kiln tail looping. 3.Optimize material properties:

For materials that are easy to form rings, the probability of kiln tail ringing can be reduced by optimizing their characteristics such as humidity, particle size, panicle and sun. 4.Overhaul of the cooling unit:

Regularly inspect and maintain the cooling device of the rotary kiln to ensure its normal operation and improve the cooling effect of the kiln tail.

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The kiln tail ring of the rotary kiln refers to the phenomenon of agglomeration at the kiln tail and the lower section during the operation of the rotary kiln. There may be several reasons for this phenomenon:1

The baking temperature is too low: If the operating temperature of the rotary kiln is too low, it will lead to incomplete baking at the end of the rotary kiln, which may lead to the end of the kiln forming circles. 2.

Excessive sintering: If the sintering is excessive, the particles in the kiln have reached a certain hardness, and it is difficult to sinter at the end of the kiln, which will form a high temperature at the end of the kiln, resulting in the accumulation of large pieces at the end of the kiln. 3.

The air volume of the kiln tail is too low: if the exhaust air volume of the kiln tail of the rotary kiln is too low, it may lead to the heat of the kiln tail part can not be fully discharged, and the flue gas contains factors such as Zen and water in the kiln, it is easy to form a kiln tail circle. 4.

The hot air temperature is too slow: if the hot air temperature of the rotary kiln is not high enough to reach the predetermined baking temperature, it is difficult to consume the water of the original kiln tail part, so it is easy to form a kiln tail circle. 5.

Excessive increase in the amount of material feed: Excessive addition of materials can easily re-bake some materials accumulated at the end of the kiln, and build the kiln with water, thus forming a circle at the end of the kiln. Therefore, it is necessary to take corresponding measures according to the situation, such as adjusting the hot air temperature and air inlet volume of the rotary kiln, etc., to prevent the formation of kiln tail loops.

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The main reasons for the end of the rotary kiln are as follows: 1The design of the kiln tail flue is unreasonable:

The flue at the end of the kiln is the channel for exhaust gas and exhaust gas, if the design is not reasonable, the flue gas flow is not smooth, which is easy to lead to the formation of backflow of flue gas at the end of the kiln, thus causing the phenomenon of ringing. 2.Kiln tail flue blockage:

Because the raw meal contains a certain amount of dust and particulate matter, these substances will be gradually deposited in the flue gas after long-term operation, resulting in the flue gas being blocked and unable to discharge smoothly, resulting in circularity. 3.The temperature of the kiln smoke is too low:

Too low the temperature of the flue gas at the end of the kiln will cause the moisture in the gas to condense and form a circle. This may be caused by the unreasonable design of the kiln flue, the flue gas velocity is too low, or the failure of the flue gas cooling equipment at the kiln tail. 4.

Excessive sulfate in kiln tail smoke: If the raw meal contains too much salt, the sulfate content in the flue gas will increase, and when the gas temperature drops, the sulfuric acid salt is easy to crystallize and form a knot. In order to solve the problem of the end of the rotary kiln, the following measures can be taken:

1.Optimize the flue design at the kiln tail to ensure the smooth flow of flue gas and avoid the occurrence of backflow. 2.

Regularly manage the flue at the end of the kiln to prevent the occurrence of blockage. 3. Increasing the flue gas temperature at the kiln tail can be achieved by adjusting the combustion system and adding fuel supply. 4.

Control the content of sulfate in the raw meal to avoid excessive sulfate from entering the flue gas at the kiln tail. In addition, the use of some chemical additives is also considered to improve the properties of kiln tail flue gas and reduce the occurrence of ringing.

Look what kiln it is. There are generally many reasons for this, mainly related to the direction of the fuel and the burner. If it is found in time, it can be solved by quenching method, and the kiln needs to be stopped if it is serious.

1.Through the alternation of hot and cold, the body of the ring eggplant stove falls off on its own, and the operation is the quenching of the circle position.

2.When the ring fibrillation is serious and cannot be solved by alternating hot and cold, the defense letter needs to stop the kiln and manually circle it.