UA142036U - METHOD OF PROCESSING INDEPENDENT METALLURGICAL SLAGS - Google Patents

Abstract

The method of processing independent metallurgical slags, mainly metallurgical slags, which are at the stage of incomplete redox sintering processes includes operations of separation of independent metallurgical slag into large, medium and shallow fractions, magnetic separation of slag and separation of large products. The slag of the fine fraction is subjected to magnetic separation and screening with the release of sieve and sub-sieve commodity products, the middle fraction of slag is subjected to machining, screening with subsequent electromagnetic separation of the sieve product and the release of marketable products. before feeding to the magnetic separation is formed into streams of single-layer fractions.

Description

A useful model belongs to ferrous metallurgy, namely to the processing of independent metallurgical slags that are at the stage of incomplete oxidation-reduction and sintering processes, in particular hot metallurgical slags or slags that have already cooled down to ambient temperature, but with the aforementioned processes still incomplete.

The well-known method of processing waste metallurgical slag is used in the complex for processing waste metallurgical slag according to Russian patent Mo 2139339, MPKbE, C2281/00, bull.

Mo. 28, 1999, which includes the operations of separating metallurgical slag into fractions, magnetic separation with the selection of marketable products and transportation of processing products.

The closest analogue to the useful model in terms of the set of features and the expected technical result is the method used in the complex for the processing of metallurgical slag according to the patent

OA Mo 52057, IPC 6 C2287/04, C2281/00, publ. 17.01.2005, including operations of separation of independent metallurgical slag into large, medium and small fractions, magnetic separation of large fraction slag with separation of marketable products and transportation of processing products.

In contrast to the declared utility model, the commercial product is obtained as a result of the primary magnetic separation of the product without its preliminary processing.

In addition to the fact that the commercial products of the large fraction are obtained as a result of the processing of independent metallurgical slags at the stage of their incomplete oxidation-reduction agglomeration processes, they are distinguished by high quality, namely, the minimum relative content of the slag component in the agglomerate: the slag shell is a metal-containing core, the commercial products of the shallow and medium fractions, as a rule, has an increased relative content of slag due to an increase in the ratio of the surface area of a sphere (or a body in shape close to a sphere) to its volume, which negatively affects the process of metallurgical redistribution.

The basis of a useful model is the task of improving the method of processing independent metallurgical slags, mainly metallurgical slags that are at the stage of incomplete oxidation-reduction agglomeration processes, by introducing new operations "in a new sequence of their execution, to ensure the most complete extraction of iron-containing inclusions and, due to this, to obtain marketable products of small and medium fractions with the lowest relative content of slag and the highest content of Eeobsch.

The task is solved by the fact that in the method of processing independent metallurgical

From the slags, mainly metallurgical slags that are at the stage of incomplete oxidation-reduction agglomeration processes, which includes the operations of separating independent metallurgical slag into large, medium and small fractions, magnetic separation of large fraction slag with the selection of marketable products and transportation of processing products, according to a useful model , the slag of the shallow fraction is subjected to magnetic separation and sieving with the selection of commercial products above the sieve and below the sieve, the medium fraction of slag is subjected to mechanical processing, sieving with subsequent electromagnetic separation above the sieve product and selection of commercial products, while above the sieve products of the medium fraction before being fed to the electromagnetic the separation and slag of the shallow fraction are formed into streams of single-layer fractions before being fed to the magnetic separation.

Due to the fact that in the method of processing independent metallurgical slag, the slag of the shallow fraction is subjected to magnetic separation and sieving with the separation of marketable products above the sieve and below the sieve, the medium fraction of slag is subjected to mechanical processing, sieving with subsequent electromagnetic separation above the sieve product and the selection of commodity products, and over the sieves, the products of the medium fraction before submission to electromagnetic separation and the slag of the small fraction before submission to magnetic separation are formed into streams of single-layer fractions, the most complete extraction of iron-containing inclusions was achieved, which made it possible to obtain commercial products of small and medium fractions with the lowest relative content of slag and the highest content of Eeobsch .

Information that confirms the possibility of industrial use of the method of processing independent metallurgical slags, mainly metallurgical slags that are at the stage of incomplete oxidation-reduction agglomeration processes.

The method is intended for the processing of metallurgical slags that are at the stage of incomplete oxidation-reduction agglomeration processes or silicate decomposition. Such slags include hot metallurgical slags and cooled independent slags. In this regard, hot metallurgical slag from steelworks is used as the initial raw material for processing, which is forcibly cooled with water until it reaches a temperature of less than 150 C. After that, the cooled metallurgical slag is divided into large (120...850) mm, medium (20...120) mm and shallow (0...20) mm fraction. Metallurgical slag of the coarse fraction (120...850) is subjected to electromagnetic separation with the help of a belt pulley and iron separator with the selection of commercial products of the coarse fraction (120...850) mm with a content

Eeovbshch more than 46 95, which are removed from the technological process with the help of vehicles, in particular, dump trucks. At the same time, the processing products of the coarse fraction, which do not contain iron, are removed from the technological process with the help of vehicles.

Metallurgical slag of fine fraction (0...20) mm is subjected to magnetic separation using a drum magnetic separator unit. After that, the iron-containing product selected as a result of magnetic separation is sieved with the separation of the commercial product of the shallow fraction (0...5) mm with the content of Eobsch. less than 4690, which is subsequently removed from the technological process.

The over-sieved commercial product of the shallow fraction (5...20) mm is also removed from the technological process as a commercial product with the content of EReobsch. more than 52 95.

The average fraction (20...120) of metallurgical slag is subjected to mechanical processing in a hammer crusher, then crushed. At the same time, electromagnetic separation separates a marketable product of medium fraction (20...120) mm with a Reobsch content of more than 52 96. Above sieve products of medium fraction before being submitted to electromagnetic separation and slag of small fraction before being submitted to magnetic separation are formed into streams from single-layer fractions, which ensures the reliability and efficiency of electromagnetic and magnetic separation. Commodity products of large, medium and small fractions are subsequently sent to repeated metallurgical redistribution.

Claims (1)

USEFUL MODEL FORMULA The method of processing independent metallurgical slags, mainly metallurgical slags that are at the stage of incomplete oxidation-reduction agglomeration processes, which includes the operations of separating independent metallurgical slag into large, medium and small fractions, magnetic separation of large fraction slag with the selection of commercial products and transportation of processing products, which differs in that the slag of the shallow fraction is subjected to magnetic separation and sieving with the selection of over-sieve and under-sieve commodity products, the medium fraction of slag is subjected to mechanical processing, screening with subsequent electromagnetic separation of the over-sieve product and selection of commodity products, while the super-sieve products of the middle fraction are submitted to electromagnetic separation and From the slag of the shallow fraction, before being submitted to magnetic separation, it is formed into flows of single-layer fractions.