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Technology for treating steel-rolling oily sludge by means of steel slag waste heat

A technology for waste heat treatment and oil sludge, which is applied in the direction of pyrolysis treatment of sludge, etc., to achieve the effects of saving cooling water, reducing costs, and simplifying the treatment process

Active Publication Date: 2016-02-24
新疆互力佳源环保科技有限公司
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Problems solved by technology

According to the above literature, it can be known that there is currently no process for treating oily sludge from steel rolling by using waste heat from steel slag.

Method used

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Embodiment Construction

[0010] A process for treating oily sludge from steel rolling by utilizing the residual heat of steel slag, the steps are as follows: 1. Spread and load steel slag exceeding one-third of the volume of the slag pool in the hot stuffy slag pool, and control the surface temperature of the steel slag at above 500°C; 2. 1. Pull and transport the oil sludge produced by steel rolling to the hot stuffy slag field, pour the oil sludge into the hot stuffy slag pool, and spread it evenly; 3. Continue to feed the slag into the slag pool, and pour high-temperature liquid steel slag on the evenly spread rolled steel For the upper part of the oil sludge, follow the normal hot stuffy slag process after 30 minutes; 4. After the hot stuffy slag process is over, select the iron in it for use according to the normal magnetic separation process of the steel slag iron selection process.

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Abstract

The invention discloses a technology for treating steel-rolling oily sludge by means of steel slag waste heat. The technology comprises the following steps that 1, steel slag accounting for more than one third of the volume of a slag pool is loaded in the hot disintegrating slag pool in a paving mode, and the surface temperature of the steel slag is controlled at 500 DEG C or above; 2, the oily sludge generated in steel rolling is transported to a hot disintegrating slag field, poured into the hot disintegrating slag pool and then evenly paved; 3, the steel slag is continuously poured into the slag pool, the high-temperature liquid-state steel slag is poured on the upper portion of the steel-rolling oily sludge which is evenly paved, and a normal hot disintegrating slag technology is implemented after 30 min; 4, after the hot disintegrating slag technology is finished, iron in the steel slag is selected to be utilized according to a normal magnetic separation technology in the steel slag iron selection process.

Description

technical field [0001] The invention relates to a process for treating oily sludge from steel rolling by using waste heat of steel slag. Background technique [0002] The main pollutants in the steel rolling wastewater are iron oxide scale and oil. After the treatment and transformation, the quality of the treated circulating water is required to be: suspended matter content ≤ 50mg / L, oil content ≤ 5mg / L. The water quality of steel rolling is mostly brown-red emulsion, the pH value is generally 6.8-7.2, the backwater SS is generally 100-300mg / L, and the oil content is generally 40-80mg / L. The treatment method is generally "one sinking, two leveling "Third filtration", "first sedimentation" refers to the first-stage cyclone sedimentation, mainly to remove large scale; "Filtration" refers to high-speed filters, magnetic filters, etc. The final formed concentrated sludge contains oil and water, and a large amount of iron oxide. Due to the above characteristics, this kind of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10
Inventor 李玉新赵序章朱君
Owner 新疆互力佳源环保科技有限公司
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