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Mud treating method

A technology of sludge and recovery method, which is applied in the direction of dehydration/drying/concentrated sludge treatment, solid waste removal, etc. It can solve the problems of inability to connect production lines, high operating costs, and pollute the environment, achieving high utilization rate and low investment , low cost effect

Inactive Publication Date: 2004-12-22
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this recycling method is that the materials after drying cannot be directly connected with the continuous production line
Moreover, sludge paste with a water content of about 40% cannot be used in production, and it takes up a lot of space in the drying and drying process, pollutes the environment, has a large investment, and has high operating costs.

Method used

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Embodiment Construction

[0008] The sludge paste recovery method of the present invention is: the sewage from the blast furnace 1 passes through the precipitator 2 to deposit the sludge to a water content of 80-90%, and uses the dehydrator 3 to dehydrate the sludge paste to a water content of 30-45%. The sewage is returned to the sedimentator 2 through the pipeline 4, and the sludge paste with a water content of 30-45% is input into the sludge bin 6 through the conveyor 5, and then transported to the sludge collection bin 8 by the transportation device 7, and the sludge is collected The silo 8 is connected to the screw feeder 9, and the screw feeder 9 is equipped with a sludge paste disperser 11, and the sludge paste enters the disperser 11 through the spiral cylinder 12 and is evenly dispersed on the sintering or pelletizing raw material belt conveyor 10 , easy to use. A mesh gland 14 is installed on the outlet of the disperser 11, and several holes are opened on the end face of the gland, and the sl...

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Abstract

The method for treating sludge includes the following steps: making the blast furnace or steel-smelting sewage pass through precipitator to precipitate sludge, and make its water content be 80-90%, using dewaterer equipment to make the water content of sludge be 30-45%, making the dewatered sewage return back into precipitator and feeding the sludge whose water content is 30-45% into sludge bin, then feeding it into sludge aggregate bin connected with screw feeder equipped with sludge disperser, and dispersing the sludge on the sintering or pelletizing raw material belt conveyer. The treated oily sludge whose waer content is 30-45% can be directly added on the sintering or polletizing raw material belt conveyer, so that it can utilize all the sludge, and its cost is low.

Description

technical field [0001] The invention relates to sludge paste, in particular to a recovery method of sludge paste. Background technique [0002] Since steelmaking sludge contains about 50% iron and ironmaking sludge contains about 30% iron, some enterprises recycle these sludges. The recovery method is: after the blast furnace or steelmaking sewage is settled to the sludge with a water content of about 85%, the sludge is dehydrated to a water content of about 40% by mechanical pressure filtration or vacuum suction filtration equipment, and then heated in a cylinder or It is dried by steam and dried in the sun until the water content is 12-15%. The dry physical material is used for pellet production after sintering or crushing. The disadvantage of this recovery method is that the materials after drying cannot be directly connected with the continuous production line. Moreover, sludge paste with a water content of about 40% cannot be used in production, and it takes up a lot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C02F11/12
Inventor 温燕明蔡漳平赵树治贺建峰
Owner SHANDONG IRON & STEEL CO LTD