What is the purpose of rapid cooling of cement kiln clinker?

The purpose of cooling is to:1. The waste heat taken away by the clinker is preheated into the secondary air of the kiln to improve the thermal efficiency of the kiln.

2. Quickly cool the clinker to improve the quality and grindability of the clinker;

3. Reduce the temperature of clinker to facilitate the transportation, storage and grinding of clinker.

The formation process of cement clinker.

1. Water evaporation

The free moisture gradually evaporates with the temperature of the material, and when the temperature rises to 100 150, all the free moisture in the raw meal is removed.

In wet production, the slurry can reach 32 to 40%, so the drying process has a great impact on yield, quality and heat consumption.

2. Dehydration of clay raw materials

When the raw meal temperature rises to 450, kaolin.

Remove chemically bound water.

At 900° 950, the amorphous substance transforms into crystals and emits heat.

3. Carbonate decomposition

Calcium carbonate. It begins to decompose at 600 with magnesium carbonate, and the decomposition of magnesium carbonate at 750 is carried out violently, while calcium carbonate decomposes rapidly at about 900.

mgco3=mgo+co2

caco3=cao+co2

The purpose of rapid cooling of clinker is as follows:

1) It can prevent or reduce the decomposition of C3S.

2) It can prevent the conversion of -C2S into -C2S at 500, so as to prevent clinker pulverization and loss of water hardness.

3) Prevent C3A from crystallizing coarsely, so as to avoid the rapid setting of cement.

4) It can prevent or reduce the generation of magnecite by MGO, thereby reducing the destructive effect of MGO on the stability of cement stone.

5) It can increase the internal stress of hot materials, which is conducive to improving the grindability.

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We are glad to answer for you what is the meaning of cement clinker quenching, dear <> hello, what is the meaning of cement clinker quenching, as follows: 1. Improve the comprehensive performance of cement clinker, so that cement clinker has stronger compressive strength and flexural strength; 2. Improve the durability of cement clinker, so that it has better alkali resistance and heat resistance; 3. Improve the crystalline structure of cement processing materials to make them have higher fineness and greater fineness; 4. Reduce the hydration reaction of cement clinker to make it have higher hydration resistance; 5. Reduce the shrinkage of cement clinker to make it have a smaller shrinkage; 6. Reduce the dust of cement clinker to make it more environmentally friendly.

Summary. Dear will be happy to answer for you! The significance of cement clinker quenching, the purpose of clinker cooling is: to improve the quality and grindability of clinker; Reduces the temperature of the clinker to facilitate the transportation, storage and grinding of the clinker; Part of the clinker out of the kiln to take away the heat, preheated.

secondary and tertiary air, thereby reducing the heat consumption of clinker and improving the heat utilization rate. Quenching is to prevent or reduce the decomposition of C3S; Avoid -c 2 s to -c 2 s; Improved cement stability; Reduce clinker C3A crystals and improve cement sulfate resistance; Improve clinker grindability; It can overcome the instantaneous or fast setting of cement.

What is the significance of cement clinker quenching.

Dear is happy to answer for you the key no! The significance of cement clinker quenching, the purpose of clinker cooling is: to improve clinker quality and grindability; Reduces the temperature of the clinker to facilitate the transportation, storage and grinding of the clinker; Part of the clinker out of the kiln to take away the heat, preheated.

The second and third times empty the Zen qi, so as to reduce the heat consumption of clinker and improve the heat utilization rate. Quenching is to prevent or reduce the decomposition of C3S; Avoid -c 2 s to -c 2 s; Improved cement stability; Reduce clinker C3A crystals and improve cement sulfate resistance; Improve clinker grindability; It can overcome the instantaneous or fast setting of cement.

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The main function of refractory bricks in rotary kiln is (), heat storage.

The main function of rotary kiln refractory bricks is to protect the kiln cylinder from the damage of high-temperature gases and high-temperature materials.

The role of rotary kiln firing with kiln skin (), effectively protecting the refractory bricks from high temperature baptism and chemical erosion. Reduce the flow rate of powder.

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After the cement clinker is out of the kiln, why should it be stored for a certain period of time?

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Hello dear, I am happy to answer the New Year's Divination for you. After the cement is ripe and the material is out of the kiln, why should it be stored for a certain period of time? Answer; The disadvantages of cement just production are hot, the heat of hydration is larger, and it cannot be put into use immediately, otherwise it will affect the growth intensity of cement, and it can only be put into use after the cement is completely cooled, and there are no strict regulations on the specific storage time.

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The clinker cooler is an air-cooled equipment that gradually cools the high-temperature clinker from 1400 to below 100, so the temperature difference between the front and rear is large. The working temperature of the hottest end of the working layer of the refractory is generally not more than 1200, and the low temperature part is not more than 1000.

The lining of the back wall of the hot end of the cooler is easy to hang a "snowman", and the lining walls on both sides are susceptible to the impact of high-temperature clinker falling. The hot-end liner is also chemically attacked by the components of alkaline sulfur-containing compounds in hot air.

The top lining sinks by its own weight, which is easy to produce internal gaps, and the high-temperature clinker containing fine particles is easy to pass through the gaps and contact the metal shell to cause thermal deformation, which produces mechanical stress on the lining and damages it.

The low walls on both sides of the cooler are subjected to long-term abrasion of high-temperature clinker (including Red River clinker), which is easy to cause abrasive damage to the lining.

The low temperature part of the cooler is lined with wall, and the cooled clinker and dusty airflow are seriously abrasive.

From the perspective of use function, the role of the clinker cooler is as follows:

1) As a process equipment, the cooler undertakes the task of rapid cooling of high-temperature clinker, especially the grate cooler, which can also quench the clinker.

2) As a thermal equipment, the cooler not only cools the clinker, but also undertakes the heating and heating task of the secondary air of the kiln and the third air entering the kiln, which has an important role in promoting the ignition and pre-ignition of the fuel (especially the medium and low-quality fuel), improving the combustion rate of the fuel, and improving the combustion efficiency, so as to ensure that the whole kiln system has an optimized thermal distribution.

3) As a thermal equipment, the cooler undertakes the task of carrying out a large amount of hot embers out of the kiln fuel.

4) The cooler effectively cools the high-temperature clinker, which is not only conducive to improving some properties of cement, but also conducive to the transportation, storage and grinding of clinker.

In order to achieve the above functions, the performance of the clinker cooler is required to be:

1) As much heat as possible of the clinker to increase the temperature of the secondary air entering the kiln and reduce the heat consumption of the clinker.

2) Shorten the cooling time of clinker to improve clinker quality and improve grindability.

3) The air consumption of cooling unit mass clinker should be small, so as to increase the secondary air temperature, reduce dust flying, and reduce power consumption.

4) Simple structure, easy operation, easy maintenance, high operation rate.

The purpose of rapid cooling of cooked shed material is as follows:

1) It can prevent or reduce the decomposition of C3S.

2) It can prevent the conversion of -C2S into -C2S at 500 hours, so as to prevent the chain from clinker pulverization and loss of water hardness.

3) Prevent C3A from crystallizing coarsely, so as to avoid the rapid setting of cement.

4) It can prevent or reduce the generation of magnecite from MGO, and reduce the destructive effect of MGO on the stability of cement stone from the bridge.

5) It can increase the internal stress of hot materials, which is conducive to improving the grindability.