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Method for treatment of turbid circulating water by steelmaking slag

A technology for turbid circulating water and treatment methods, applied in water/sludge/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Problems such as difficulty in layout layout, to achieve the effect of convenient management and operation, ensuring the effect, and saving space.

Inactive Publication Date: 2010-11-24
BAOSTEEL ENG & TECH GRP
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Problems solved by technology

[0006] The current actual use situation is: due to the limited land use for slag treatment, the surface load of the turbid circulation advection sedimentation tank for slag treatment is relatively high, all exceeding 2m 3 / (m 2 h), even up to 3~4m 3 / (m 2 h), leading to poor sedimentation effect in the sedimentation tank; if it is necessary to follow the 1m 3 / (m 2 h) Left and right surface load design, slag treatment turbidity circulating water is usually hundreds of cubic meters per hour, and the area of ​​the sedimentation tank needs to be several hundred square meters, which becomes extremely difficult in the layout of the general plan

Method used

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  • Method for treatment of turbid circulating water by steelmaking slag

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[0031] Such as figure 1 with figure 2 As shown, the slag treatment process water is evaporated and drained, then flows into the open ditch for drainage, flows into the water absorption well to replenish water, then pressurizes through the water pump, and finally passes through the solid-liquid separator to discharge the wastewater with high solid content, and the rest of the water is recycled.

[0032] This process uses a solid-liquid separator to replace the advection sedimentation tank of the traditional process. The solid-liquid separator is based on the principle of centrifugal separation and is used to separate the precipitated solids in the liquid. The accelerated motion inside the solid-liquid separator generates a high-speed rotating vortex, which efficiently separates the solid impurities in the liquid. At present, the new solid-liquid separator can separate solid particles with a specific gravity greater than liquid from 3 μm to 9 mm. The turbid circulating water...

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Abstract

The invention relates to a method for the treatment of turbid circulating water by steelmaking slag, which comprises the following steps that: water for slag treatment technology is evaporated and drained and then flows into an open channel for drainage; the water flows into an absorbing well for water supplement; pressurization is achieved via a water pump; and waste water with high solid content is drained via a solid / liquid separator, with the remaining water recycled. According to the method, the adoption of the solid / liquid separator greatly saves the space taken by water treatment and industrial land which is increasingly scarce, in addition, maintenance, management and running of the equipment are extremely convenient. The method for the treatment of turbid circulating water by steelmaking slag can guarantee the treatment effect of circulating water, saves the floor area, and includes large popularization and application value.

Description

technical field [0001] The invention relates to a method for treating steelmaking wastewater, in particular to a method for treating turbid circulating water with steelmaking slag. Background technique [0002] The amount of converter slag is relatively large. Large-scale converters use hot slag splashing. The liquid slag is poured on the slag bed or many splash plates, and is broken into small slag blocks by spraying water to cool. Some small-scale converters use slag water quenching, the liquid slag falls into the high-speed water flow through the slag hole at the bottom of the slag tank car, and is cooled to form fine particles, and some slag crushing methods are also used. [0003] In recent years, the drum slag treatment process has been gradually promoted and used in China. The drum slag treatment process is to quench the high temperature (1300℃~1550℃) molten steel slag in the drum, solidify and break it, and the steel slag is directly transported outside without fall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
Inventor 金亚飚
Owner BAOSTEEL ENG & TECH GRP
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