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A method for non-stop production of zinc oxide rotary kiln

A rotary kiln and zinc oxide technology, applied in the field of metal processing, can solve problems such as production stoppage, additional cost consumption, kiln brick blasting, etc., and achieve the effects of reducing labor intensity, increasing cost consumption, and reducing safety hazards

Active Publication Date: 2019-02-19
WESTERN MINING CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing zinc oxide rotary kiln is forced to stop production due to ring formation, and the frequent shutdown of the kiln causes kiln bricks to explode, and the replacement of kiln bricks increases additional cost consumption. A zinc oxide rotary kiln is proposed. Kiln shutdown method

Method used

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Embodiment 1

[0016] In the case of ensuring a reasonable ingredient ratio, the usual ratio is coke grains: kiln slag = 1:1 (the workshop is usually measured by the electronic scale of the crane grab bucket, the coke grains are about 1.4t per bucket, and the kiln slag is about 3t per bucket ), strictly control various parameters such as kiln head air pressure (0.15~0.2Mpa), kiln negative pressure (15~20Hz), kiln body speed (12~15Hz), and put the kiln head air duct into the horizontal position of the inner ring. At 1 / 3 of the cross-section, the ring formation in the kiln has been basically solved after about 24 hours of "chemical kiln".

[0017] Because the main component of the kiln slag is Fe, the kiln slag and coke particles enter the kiln after a reasonable ratio. When the kiln tail temperature reaches above 950°C, the reaction zone temperature in the kiln is above 1600°C (the melting point of iron is 1535°C). The inner ring contacts to form a liquid phase melt, which is discharged out ...

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Abstract

The invention belongs to the field of metal processing, and particularly relates to a non-stop production kilning method for a zinc oxide rotary kiln. The non-stop production kilning method for the zinc oxide rotary kiln comprises the steps that 1) scorched particles and kiln slag are mixed according to a certain ratio, and then are sent into the kiln from a kiln tail; (2) the kilning time is 20-28h, a formed ring in the rotary kiln is in contact with a high-temperature liquid substance formed by a kilning material to form a liquid phase melt; and 3) a kiln head air pipe is placed at a one-third part of the formed ring in the rotary kiln, and the melt is discharged out of the rotary kiln through rotation of a kiln body and wind power of the kiln head air pipe. The non-stop production kilning method has the advantages that no stop production overhaul is caused by the formed ring in the rotary kiln, the labor intensity of workers is reduced, and potential safety hazards are reduced. The economic benefits are considerable; the loss of zinc oxide is reduced by 1080 metal tons all year around (if stop production occurs at least three days monthly, 30 metal tons of zinc oxide per day multiplied by 36 days is equal to 1080 metal tons).

Description

technical field [0001] The invention belongs to the technical field of metal processing, and in particular relates to a method for non-stop production of a zinc oxide rotary kiln. Background technique [0002] Since the zinc oxide workshop was put into production, ring formation in the rotary kiln has been a major problem restricting the continuous and stable production of the rotary kiln. In the normal production of the rotary kiln, production is forced to stop for a long time due to ring formation, with an average of at least 3 days of production shutdown per month (excluding cooling and kiln lighting time), which affects the annual production task. Stopping production and maintenance due to ring formation in the kiln increases the labor intensity of workers. Frequent shutdown and start-up of the kiln can easily cause kiln bricks to explode, and replacement of kiln bricks will increase additional cost consumption. [0003] Based on the above problems, the present inventio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/38
CPCC22B19/38
Inventor 蒋明峰王海强巨敬德包永安徐成云贾宝山高杨马元刚吴志愿
Owner WESTERN MINING CO LTD
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