A method for recovering metallic iron from stainless steel slag
A technology of stainless steel slag and metal iron, which is applied in the field of comprehensive utilization of resources, can solve problems such as environmental pollution and waste of resources, and achieve the effects of low investment, high work efficiency and simple process
Active Publication Date: 2017-09-15
SHANGHAI BAOSTEEL ENERGY TECH
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Problems solved by technology
[0003] The purpose of the present invention is to provide a method for recovering metallic iron from stainless steel slag, so as to solve the backward treatment method that most of the existing stainless steel slag adopts manual sorting of large pieces of slag steel and tailing slag, which not only wastes resources, but also causes Technical Problems of Environmental Pollution
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[0024] The present invention will be described in detail below in conjunction with the accompanying drawings. In order to enable those skilled in the art to clearly and completely understand the contents of the present invention and implement the technical solutions of the present invention, a large number of details are disclosed in the embodiments. However, obviously, without these details, those skilled in the art can also implement the technical solution of the present invention, achieve the purpose of the present invention, and realize the effect of the present invention. These details are the optimal implementation mode selected by the inventor through a large number of experiments, and are not used to limit the protection scope of the present invention. The scope of protection of the present invention is based on the content of the claims, and technical solutions obtained by those skilled in the art based on the content disclosed in this application document without cre...
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The invention discloses a method for recycling metallic iron from stainless steel slag. The method comprises the following steps of performing cooling treatment by spraying water to the stainless steel slag; screening the stainless steel slag through a first griller; screening the screen underflow of the first griller through a second griller, smashing the oversize products of the second griller and then returning to the second griller for screening, and enabling the screen underflow of the second griller to enter a primary wet ball mill for smashing; screening the stainless steel slag from the primary wet ball mill through a third griller, smashing the oversize products of the third griller by placing into a secondary wet ball mill, then placing the discharging material of the secondary wet ball mill and the screen underflow of the third griller on a table to perform gravitational segregation, and collecting metallic iron particles at the concentrate end of the table; concentrating overflow slag slurry at the tailings side of the table, and pressing the concentrated slurry into a mud cake. According to the method provided by the invention, chunks of steel slag are no need to be sorted manually, so that the working efficiency is high, and moreover, the treated steel slag can be comprehensively utilized, so that resources are not wasted and environment pollution cannot happen.
Description
technical field [0001] The invention relates to the technical field of comprehensive utilization of resources, in particular to a method for recovering metallic iron from stainless steel slag. Background technique [0002] Stainless steel slag can be divided into electric furnace stainless steel slag, converter stainless steel slag and AOD stainless steel slag. Most of the current stainless steel slag is converter stainless steel slag and AOD stainless steel slag. Stainless steel slag often contains about 5% to 15% of residual steel, and iron resources are relatively rich. Recycling metal iron from stainless steel slag can not only reduce the amount of waste slag and The potential harm to the environment brings good environmental and social benefits, and more importantly, it can recycle metal resources to bring huge economic benefits, so as to alleviate the shortage of resources and enable enterprises to take the road of sustainable development. The shape of electric furnac...
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IPC IPC(8): C21B3/04
CPCY02P10/20Y02W30/50
Inventor 刘平龙飞
Owner SHANGHAI BAOSTEEL ENERGY TECH