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What is clinker cooling?

What is clinker cooling?

Modern clinker coolers have an air flow perpendicular to the clinker flow, absorbing thermal energy. This hot air is used almost entirely as secondary air for combustion in the rotary kiln, or as tertiary air to the tertiary air duct.

Why clinker is cooled rapidly?

Clinker cooling is necessary because: Hot clinker is difficult to convey. Hot clinker has a negative effect on the grinding Process. The reclaimed heat content of the hot clinker of about 200 kcal/kg, is an important factor lowering the production cost.

How do you measure a clinker temperature?

􀀁 Ensure that the clinker sampling and clinker temperature measurement area are brightly lighted. 􀀁 Move the insulated vase close to the clinker sampling area. 􀀁 Set up thermocouple and electronic thermometer. Ensure the probe connector is correctly connected to the terminal of the thermometer.

What was the temperature of the clinkering zone?

In these kilns, a tube with a diameter up to 8 m is installed at a 3–4° angle and rotates one to three times per minute. The ground raw material, fed into the top of the kiln, moves down the tube toward the flame. In the sintering (or clinkering) zone, the combustion gas reaches a temperature of 1800–2000°C.

What is clinker made of?

It is essentially a mix of limestone and minerals that have been heated in a kiln and have been transformed by this heat. When limestone is converted to clinker, CO2 is released (also known as process emissions).

How do you cool a clinker?

To produce cement, the raw meal is burned to clinker in a long rotary kiln. After leaving the rotary kiln, the clinker has a temperature of up to +1300 °C and must be cooled down to a temperature of about +200 °C for further storage. To achieve this, the clinker bed is cooled with a continuous stream of air.

What is the temperature range in the cement kiln?

Kiln charge temperatures in the sintering zone of rotary kilns range at around 1450 °C. To reach these, flame temperatures of about 2000 °C are necessary.

What is cement clinker used for?

Uses. Portland cement clinker (abbreviated k in the European norms) is ground to a fine powder and used as the binder in many cement products.

What is the temperature range in a cement kiln?

Also known as the firing zone, the burning zone is at the lower end of the rotary kiln, where the cement components are heated to about 1300-1450 °C (2372- 2642 °F), forming clinker. Accurate temperature measurements are critical for product quality, environmental performance and kiln lifetime.

Is clinker hazardous?

Clinkers are non-combustible and non-explosive and will not facilitate or sustain the combustion of other materials. Clinker poses no fire-related hazards. No need for special protective equipment for fire- fighters. Ensure that the workers wear appropriate personal protective equipment and prevent dust from spreading.

How is the cooling of a clinker modeled?

The cooling of the clinker is modelled by a gas-solid series of cross-current contacting stages fully mixed for the calculation of the temperatures of the clinker and the air with their thermodynamic properties along the cooler.

How does clinker cooler reduce cement production energy consumption?

The cement calcining system mainly reduces energy consumption by saving coal and power. It is generally believed that in order to reduce energy consumption of the clinker production line, improvements should be made in the preheater outlet temperature, cooler outlet temperature, and clinker temperature out of the cooler.

What is the difference between a grate cooler and a clinker cooler?

Air volume is small, high-temperature clinker can not “quench”. Grate Cooler: grate cooler is a kind of cement cooler that cools the clinker at a rapid rate. The temperature of clinker is reduced by cold air passing through the horizontally moving material layer from the bottom in a vertical direction.

What kind of cooler is used in cement plant?

While the rotary cooler and the grate cooler are now the most commonly used cement equipment in the cement plant. Rotary Cooler: rotary cooler is the earliest used one in the cement plant. It is similar to the cement rotary kiln in appearance and equipped with refractory lining and material lifting device inside.

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