A kind of tunnel kiln for iron ore magnetization roasting and iron ore magnetization roasting method

A technology of magnetization roasting and tunnel kiln, which is applied in the field of minerals and metallurgy, can solve the problems of low fuel utilization rate, air pollution, waste of energy, etc., and achieve the effects of reducing fuel consumption, benefiting environmental protection, and improving uniformity

Active Publication Date: 2018-11-23
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to provide a tunnel kiln for iron ore magnetization roasting to solve the problems of low fuel utilization rate, direct discharge of high-temperature flue gas, waste of energy and air pollution in the prior art

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  • A kind of tunnel kiln for iron ore magnetization roasting and iron ore magnetization roasting method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032]A tunnel kiln for magnetizing and roasting iron ore, comprising a tunnel kiln body, a kiln-entry smoke extractor, a regenerative heat exchanger, and an atomized water cooling device arranged outside the tunnel kiln body. The tunnel kiln body 1 is sequentially divided into Drying preheating section 2, high temperature roasting section 3, flue gas cooling section 4, atomized water cooling section 5, dust removal and sewage discharge device 6 is also provided outside the tunnel kiln, at least one section is installed in the tunnel kiln; drying preheating section 2 includes Fume extractor 7 at the kiln end and a branch pipe 8 arranged at the smoke exhaust port at the kiln end; the high-temperature roasting section 3 includes a smoke exhaust port 9, a regenerative heat exchanger 10, a dust collector 11, a high-temperature roasting smoke extract...

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Abstract

The purpose of the invention to provide an iron ore magnetizing roasting tunnel kiln and an iron ore magnetizing roasting method in order to solve the problems of low fuel utilization rate, direct discharge of high temperature flue gas, energy waste and air pollution in the prior art. The tunnel kiln comprises a drying preheating section, a high temperature roasting section, a flue gas cooling section, an atomized water cooling section and an externally arranged dust and pollution discharging device. The roasting method comprises the steps of mixed material preparation, kiln car material distribution, high temperature waste heat recycling and cooling, air flow regulating, flue gas cooling, wet flue gas treatment, and discharge. Multiple working sections arranged in the invention respectively have high temperature material cooling buffering, wet flue gas pollution treating, roasting yield increasing, roasting cost reducing and energy consumption reducing effects.

Description

technical field [0001] The invention belongs to the technical field of mineral and metallurgy, and in particular relates to a tunnel kiln for iron ore magnetization roasting and an iron ore magnetization roasting method. Background technique [0002] At present, the traditional iron ore tunnel kiln direct reduction process is to put iron concentrate, coal powder, and limestone powder into the reduction tank according to a certain proportion and charging method, and then put the tank on the tank car and push it into the strip tunnel kiln. , or put the tank directly into the annular wheel kiln, and the material tank is heated, roasted and cooled at about 1150 ° C to obtain direct reduced iron. The direct reduction process of iron ore coal-based tunnel kiln has the characteristics of mature technology and simple operation, but there are problems such as small production capacity of a single machine, high energy consumption, and serious environmental pollution in the direct redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00C22B1/02F27B9/02F27B9/12F27D17/00
CPCC21B13/0066C22B1/02F27B9/02F27B9/12F27B2009/124F27D17/004Y02P10/25
Inventor 王明华鲁逢霖展仁礼周绍芳权芳民雷鹏飞张志刚边立国郭忆马胜军白江虎王建平李慧春
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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