Water slag flushing system based on bottom filtering method and technique

Abstract

The invention discloses a water slag flushing system based on a bottom filtering method and a technique. The system comprises a slag water quenching granulation device, a steam condensation dehumidification tower, a slag-water separation unit, a movable steam collecting hood, automatic slag catching equipment and a circulating water cooling system, wherein the slag water quenching granulation device is connected with the slag-water separation unit through a water-slag ditch, a hot water pool is arranged at the bottom of the slag-water separation unit, a filter plate is arranged above the hot water pool, and the movable steam collecting hood is mounted at the top of the slag water separation unit; the automatic slag catching equipment is arranged above the slag-water separation unit and used for catching treated slag. The technique adopting the system for treatment is suitable for water quenching and granulation treatment of high-temperature slag in the metallurgical field, and is especially suitable for water quenching, granulation, slag-water separation, as well as steam condensation, dehumidification and defogging of molten liquid slag from blast furnaces, melting reduction furnaces and the like.

Description

technical field [0001] The invention belongs to the technical field of waste environmental protection treatment, and in particular relates to a water quenching and slag-water separation system. Background technique [0002] There are two methods of water quenching treatment for blast furnace ironmaking slag in China: mechanical method and bottom filtration method. The mechanical method has shortcomings such as unclean filtration, high system failure rate, heavy maintenance workload, high operating cost, and high one-time investment. However, the existing bottom filtration method for slag has the following disadvantages: ①The slag water quenching ditch and the steam above the filter pool are diffuse, which pollutes the environment greatly; ②The filter layer is hardened seriously, and it is difficult to replace, which affects the production rhythm of the blast furnace; ③Manual is required. Grabbing slag, low degree of automation; ④ inaccurate detection of liquid level in the ...

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Problems solved by technology

The mechanical method has shortcomings such as unclean filtration, high system failure rate, heavy maintenance workload, high operating cost, and high one-time investment.

However, the existing bottom filtration method for slag has the following disadvantages: ①The slag water quenching ditch and the steam above the filter pool are diffuse, which pollutes the environment greatly; ②The filter layer is hardened seriously, and it is difficult to replace, which affects the production rhythm of the blast furnace; ③Manual is required. Grabbing slag, low degree of automation; ④ inaccurate detection of liquid level in the pool, difficult to achieve chain control, resulting in equipment failure, system paralysis; ⑤ thick filter layer, requires a lot of pebbles, construction and production maintenance cause waste of resources

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