Production process for preparing high-iron-grade product and calcium magnesium acetate from RO-phase-containing material

Abstract

The invention provides a production process for preparing a high-iron-grade product and calcium magnesium acetate from an RO-phase-containing material. The RO-phase-containing material is added into an acetic acid solution; stirring reaction is performed, so that non-FeO ingredients in the RO phase and hydrated active minerals in the steel slag are sufficiently dissolved; still standing is performed so that the non-dissolved residue is sufficiently settled, and the solution layers; supernate is extracted to obtain the calcium magnesium acetate solution containing acetic acid; settled materialsare subjected to extraction filtering and dewatering to obtain the high-iron-grade material which can be used as iron making concrete powder making or heavy medium powder for coal dressing; the calcium magnesium acetate solution containing acetic acid is heated to 1 to 50 DEG C to obtain the calcium magnesium acetate powder dried by distillation; the calcium magnesium acetate powder can be used as a desulphurization and denitrogenation agent for fire coal or environment-friendly snow-melting agent. The selective dissolution effect of the acetic acid solution on the RO phase ingredient is used; the MgO, CaO and MnO ingredients in the RO-phase-containing material are dissolved out; the high-grade iron concretes are obtained; a new technology is provided for the steel slag resource utilization; the operation of the technical process is easy; waste gas, waste water and industrial slag cannot be generated; the operation cost is low.

Description

technical field [0001] The invention belongs to the technical field of deep processing of steel slag, relates to the deep processing of RO phase-containing products extracted from steel slag, and particularly relates to a production process for preparing high-iron-grade products and calcium-magnesium acetate from materials containing RO phase. Background technique [0002] In 2017, the national crude steel output was 831 million tons, and the steel slag production was calculated as 13% of the crude steel volume, and the annual steel slag production was 108 million tons. The RO phase is a continuous solid solution of divalent metal oxides such as FeO, MgO, CaO, and MnO, and its content in steel slag tailings is about 30%. Steel slag powder made by direct grinding of steel slag tailings, three hydrated inert minerals RO phase, Fe, Fe 3 o 4 The total content of the compound generally accounts for more than 35%, and it is difficult to use it as a cement admixture or concrete a...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the disadvantages of the low iron grade of the RO-containing phase in the above-mentioned prior art and the inability to meet the requirements of the concentrate powder index, the purpose of the present invention is to provide a production process for preparing high-iron grade products and calcium magnesium acetate from materials containing the RO phase. The selective dissolution of the RO phase components dissolves the MgO, CaO and MnO components in the RO phase materials to obtain high-grade iron ore concentrates, which provides a new technology for the resource utilization of steel slag. The process is easy to operate and does not require Produce "three wastes" and low operating costs

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