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Method and equipment system for treating oil-containing iron scale for steel rolling

A treatment method and technology for iron scale, which are applied in the fields of dehydration/drying/concentrated sludge treatment, iron oxide and solid waste removal, etc. The effect of avoiding dust pollution and water pollution and reducing the loss of waste oil

Inactive Publication Date: 2006-08-23
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the existing domestic and foreign iron scale deoiling patent technology, there are common problems that easily lead to secondary pollution, and the waste iron scale oil cannot be recycled.

Method used

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  • Method and equipment system for treating oil-containing iron scale for steel rolling
  • Method and equipment system for treating oil-containing iron scale for steel rolling

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Embodiment Construction

[0009] The present invention relates to a method for treating oily iron scale in rolled steel, the implementation steps of which include: (1) first drying and removing the moisture in the iron scale; (2) performing low-temperature distillation and deoiling treatment on the oily iron scale after drying and dehydration; 3) reclaiming the removed waste oil; (4) using the deoiled clean iron scales as raw materials for further deep processing. The drying and dehydration temperature range of the iron scale is controlled within the temperature range (100° C.-200° C.) below the starting boiling temperature of waste oil and above the boiling point of water. The temperature of the iron scale distillation and deoiling is controlled above the boiling temperature and below the carbonization and coking temperature, and the temperature range is between 350°C and 400°C. Waste oil recovery adopts the method of combining waste oil direct spray absorption and water indirect cooling, using recycl...

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Abstract

The invention discloses an approach to recycle waste oil of steel rolling iron scale and its equipment system. It relates to processing technology and equipment of steel rolling sludge, especially the waster oil recycling approach and equipment system of steel rolling iron scale. Character of the invention is that firstly vaporize to remove moisture, then remove waste oil using low-temperature distillation, and finally, reach the target of cleaning iron scale and recycling waste oil of iron scale. The equipment is made up with desiccation dehydration system, microtherm deoiling system and waste oils recycling system. Merits of the invention are that it can avoid soot and water body pollutant, recycle waste oils and clean deoiling iron scale can be used as deep-processing materials.

Description

technical field [0001] The invention belongs to the field of processing technology and equipment for steel rolling sludge, and in particular relates to a method and an equipment system for recycling waste oil from rolling steel scales. technical background [0002] During the heating and rolling process of steel billet (steel ingot), the surface is oxidized to form iron scale (electrically called iron oxide scale). Most of the iron scales produced on the rolling line, together with the hydraulic oil, gear lubricating oil, and mechanical lubricating oil leaked from the rolling mill, are washed into the swirl well or the advection pool through the water ditch. Because the iron scales are loose and porous, a large amount of water and oil are absorbed in the process, so the iron scales that are taken out with a grab bucket become oily and watery iron scales. The oil-containing and water-containing iron scale produced in the steel rolling process is a kind of waste in the iron a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12C01G49/06C10M175/00C22B1/00B09B3/00
Inventor 廖洪强何亚斌余广炜赵志星李东涛赵鹏王纯政程晓光
Owner SHOUGANG CORPORATION
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