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 con

Images