Method for removing formation rings in kiln

An internal blast, oxygen content technology, applied in descaling devices, furnaces, lighting and heating equipment, etc., can solve the problems of inability to kiln, serious ring formation, product quality decline, etc., to save kiln costs, increase Production value, time saving effect

Active Publication Date: 2014-02-19
YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantage that the kiln shutdown time is too long, which affects the production output.
[0006] Most manufacturers now adopt the first method, which can continue production without stopping the kiln; the second method is used when the first method cannot be used, such as the following situations: (1) The ring-forming part enters from the kiln head After 28m, the chemical kiln has no effect for a few days
(2) The ring formation in the kiln is quite serious, the inner diameter is too small, the smoke can hardly pass through, and the kiln cannot be melted
[0007] The internal diameter of the kiln ring in the applicant's processing plant is only 800cm, which seriously affects the inability of raw materials to pass through. A large amount of raw materials blocked at the end of t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The inner circle of No. 2 kiln of our company is 22-26m away from the kiln head. The width of the circle is about 300cm, the thickness is 700cm, and the inner diameter of the kiln is 1100cm. The air with an oxygen content of 65% is blown into the kiln through the Roots blower, the air pressure is 0.3MPa, and the air volume is 10000m 3 / h. After 30 minutes, the rings melted, and the inner diameter of the kiln more than doubled. After 4.5 hours of continuous treatment, the rings basically melted. After testing, the inner diameter of the kiln where the ring is formed is 2-2.2m, and it can be transferred to normal production.

Embodiment 2

[0027] The No. 1 kiln of our company has ring formation in the kiln, 22-26m away from the kiln head, the ring formation is serious, and the inner diameter of the kiln is only 900cm. The air with an oxygen content of 60% is blown into the kiln through the Roots blower, the air pressure is 0.25MPa, and the air volume is 11000m 3 / h. After 4 hours of treatment, the knot loops had largely melted. After testing, the inner diameter of the kiln at the ring formation is 1.8-2m, which can be transferred to normal production.

Embodiment 3

[0029] The No. 2 kiln of our company has ring formation in the kiln, 22-26m away from the kiln head, the ring formation is serious, and the inner diameter of the kiln is only 900cm. The air with an oxygen content of 70% is blown into the kiln through the Roots blower, the air pressure is 0.2MPa, and the air volume is 8000m 3 / h. After 5.5 hours of treatment, the knot rings basically melted. After testing, the inner diameter of the kiln at the ring formation is 1.8-2m, which can be transferred to normal production.

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Abstract

The invention relates to a method for removing formation rings in a kiln. The method comprises the step of blowing air into the kiln, wherein the oxygen content of the air is 60%-70%. The method has the advantages that cost can be lowered, melting can be quickly performed on the kiln, the time for performing melting on the kiln is 5 hours or so, and therefore time is greatly saved.

Description

technical field [0001] The invention relates to a method for removing rings in a kiln. Background technique [0002] Ring formation refers to the formation of an annular and hard ring in a specific area of ​​the kiln due to excessive bonding of materials during normal production in the kiln, which hinders the movement of materials. Ring formation in the kiln is a problem that often occurs in the smelting industry at present. It will destroy the normal heating process in the kiln, affect the ventilation in the kiln, and directly affect the product, quality and long-term safe operation of the kiln. For example, usually low melting point in the production process of volatilization kiln: SiO 2 ≥13%, Al 2 o 3 ≥3.5%, S≥7%, Pb≥7%, the liquid phase in the volatilized materials increases at 850-1100°C, and the low melting point substances will stick to the inner wall of the kiln layer by layer. The diameter is getting smaller and smaller to form a ring (ridge), so that the materi...

Claims

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Application Information

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IPC IPC(8): F27D25/00
Inventor 马应文刘大龙
Owner YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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