A stainless steel slag wet treatment process method and device

Abstract

The invention provides a wet treatment technological method and a wet treatment technological device for stainless steel slag, and belongs to the technical field of utilization of metallurgical solid wastes. The technological method comprises the following steps: steel slag tilting, quenching treatment, preliminary screening, grinding by a mill, secondary screening, separation by gravity dressing equipment, and water filtration and drying in air. The technological device comprises a tilting mechanism, a quenching device, a vibration screen, the mill, a rotary screen and the gravity dressing equipment. The tilting mechanism drives the steel slag to be tilted into the quenching device so as to quench the steel slag; after being discharged by the vibration screen, the cracked and granulated steel slag flows into the mill for further grinding under the impact of high-pressure water; the rotary screen arranged at the outlet of the mill is used for performing secondary screening; and siftage of the rotary screen enters the gravity dressing equipment for further separation. The wet treatment technological method and the wet treatment technological device adopt the full-wet treatment mode, so that production of dry ash is avoided; furthermore, metals can be recycled stage by stage, so that the metal yield is 90 percent or above; and finally, tailings are intensively recycled, so that resource utilization of the tailings is realized.

Description

Technical field [0001] The invention relates to the technical field of metallurgical solid waste utilization, in particular, to a process method and device for processing stainless steel slag. Background technique [0002] According to statistics, about 20% of steel slag is produced for every ton of stainless steel produced, and the metal content in the slag is about 10%. Stainless steel slag contains precious and rare heavy metals such as nickel and chromium. If not handled properly, it may cause serious environmental pollution. Therefore, recycling the metal in stainless steel slag and realizing the recycling of stainless steel slag resources are important issues facing steel companies. [0003] At present, domestic stainless steel manufacturers mainly adopt different slag treatment processes based on the different physical characteristics of electric furnace slag and AOD (argon oxygen refining equipment) slag in stainless steel slag. Electric furnace slag is lumpy and broken in...

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Problems solved by technology

[0006] In view of the above problems, the present invention provides a stainless steel slag wet process method and device, which realizes unified wet process treatment of electric furnace slag and AOD slag generated in the stainless steel production process, recovers metals in steel slag, and realizes tailing The resource utilization of slag is used to solve the problems of low metal recovery rate and high construction and operation costs in the prior art

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