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Device and method for stably adding sludge in sintering

A sludge and stabilization technology, applied in chemical instruments and methods, mixer accessories, mixers, etc., can solve problems such as sintering production fluctuations, impurities, and easy precipitation, etc., to increase the amount of sludge added, reduce costs, and improve The effect of active ingredients

Active Publication Date: 2015-04-01
HEBEI IRON AND STEEL
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Problems solved by technology

However, because the sludge is highly viscous, easy to precipitate, and has many impurities, it is prone to clogging of pipes, valves, and nozzles, and it is difficult to add sludge evenly and stably. At the same time, sintering production has certain requirements for water, especially the density of transported sludge changes rapidly. If the amount of mud added is not adjusted in time, it often causes fluctuations in sintering production

Method used

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  • Device and method for stably adding sludge in sintering

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Embodiment approach

[0044] The converter mud is transported to the mud mixing tank by two mud supply pipelines from the power plant, and the mud concentration is controlled at 16%-22%. In order to avoid pipeline blockage caused by high mud concentration, the production water in the factory is replenished through the water supply pipeline to dilute the mud to meet the normal production needs.

[0045] The mud mixing pool has a diameter of 8 meters and a depth of 3 meters, of which the underground part is 2.8 meters and the above-ground part is 0.2 meters. The awning is built on it. The liquid level of the mud pool is kept at 1.8-2.2 meters in normal use. No less than 2 times to get mud in the class; 360m 2 The sintering machine can use about 150t of mud per day.

[0046] The equipment on the mud mixing tank platform includes 3 sets of mud pumps, model 50YZ36-50, power N=22KW / set, two open and one standby; 3 sets of mixing pumps, model Y160L-4, power N=15KW / set, fully open. The mud conveying capa...

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Abstract

The invention relates to a device and a method for stably adding sludge in sintering, and belongs to the technical field of metallurgical dust sludge recycling. The technical scheme adopted by the invention is that after being mixed by a mixing pump, the sludge in a sludge mixing tank is filtered by a filter and then enters into a sludge pump, and is conveyed in a depositing tank through a main sludge conveying pipeline; after being deposited by the depositing tank, the sludge is conveyed in a mixing machine, and in the mixing machine, compressed air pipelines are mounted on the main sludge conveying pipeline side by side; a spray nozzle is mounted on the main sludge conveying pipeline; a fan-shaped reflecting plate is arranged at an outlet of the spray nozzle; the sludge is sprayed from the spray nozzle to the reflecting plate, and is blown away into mist by 0.06 MPa compressed air in the compressed air pipelines, so that the sludge is uniformly added at the fixed point. The device and the method have the advantages and benefits that the sludge in a converter is effectively utilized, so that the purpose of environment protection is achieved, and the active ingredients of sintering material are increased; meanwhile, the sludge addition technology is enabled to be continuously and stably adopted through automatic control, the sludge addition amount is increased greatly, and the cost of sintering ore is reduced greatly.

Description

technical field [0001] The invention relates to a device and method for adding sludge for stable sintering, and belongs to the technical field of metallurgical dust and sludge reuse. Background technique [0002] In the iron and steel smelting and sintering system, sometimes when mixing materials, metallurgical dust and sludge, called sludge, are added to achieve the purpose of energy saving and environmental protection. However, because the sludge is highly viscous, easy to precipitate, and has many impurities, it is prone to clogging of pipes, valves, and nozzles, and it is difficult to add sludge evenly and stably. At the same time, sintering production has certain requirements for water, especially the density of transported sludge changes rapidly. Large, the amount of mud added is not adjusted in time, often resulting in fluctuations in sintering production. Contents of the invention [0003] The purpose of the present invention is to provide a stable sintering sludg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F15/02B01F15/04C22B1/243
Inventor 周静张义明范文生王国华王静于勇王兰玉王新东李一栋李宝生程翠花饶连海齐英华张申
Owner HEBEI IRON AND STEEL
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