A stripping mill for separating iron particles and silicate minerals in steel slag and its application method

Abstract

The invention discloses a stripping mill for separating iron grains and silicate minerals in steel slag and a use method thereof. The stripping mill comprises a base, a shell, a lower rotating grinding body, an upper fixed grinding body, a lower rotating grinding body and an upper A stripping grinding chamber is formed between the fixed grinding bodies. A pressure applying mechanism is set on the base. The pressure applying mechanism drives the upper fixed grinding body to be close to or away from the lower rotating grinding body. The top of the shell is equipped with a feeding pipe and a rotating cage powder separator. The lower rotating grinding body is provided with a separation channel through which the stripped and ground iron particles and the stripped and ground silicate mineral powder pass through. The method comprises the following steps: 1. preparation before use; 2. peeling and grinding of steel slag; 3. separation of iron particles and silicate minerals. The invention has reasonable design, realizes the stripping and grinding separation of iron grains and silicate minerals in the steel slag, realizes large-scale resource utilization, and satisfies the large-scale solid waste utilization of steel slag.

Description

technical field [0001] The invention belongs to the crushing and separating device in the technical field of metallurgy, and in particular relates to a stripping mill for separating iron particles and silicate minerals in steel slag and a use method thereof. Background technique [0002] As we all know, when dealing with steel slag in the late stage of iron and steel smelting in the metallurgical industry, the commonly used material crushing equipment is mainly a crusher. After multi-stage crushing and iron removal, the steel slag less than 10mm is finally formed, and the total iron content is between 17% and 22%. Among them, the content of elemental iron is 2% to 3%, and the rest exists in the form of RO phase of solid solution of divalent metal oxides such as FeO and MgO. Traditional material crushing equipment processes steel slag, constantly breaking and grinding, energy consumption and material wear are serious, and steel slag cannot be processed in place. The final ste...

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Problems solved by technology

Traditional material crushing equipment processes steel slag, constantly breaking and grinding, energy consumption and material wear are serious, and steel slag cannot be processed in place. The final steel slag tailings are part of the iron particles wrapped by silicate phase minerals, that is, the active mineral silicon in steel slag. Iron-rich materials such as salt phase and some iron particles cannot be further separated. Due to this limitation, large-scale resource utilization of steel slag tailings cannot be realized. Steel slag tailings in all iron and steel enterprises are piled up like mountains, which occupies a huge area and pressures on environmental protection

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