SU836173A1 - Charge for reflective smelting - Google Patents

Description

, 54) CHARGE OF REFLECTIVE MELTING

The content of ikel and iron ferrites and iron was 58.8%; the production of a viscous dump pork with a high content of agnetite (15.5%) and non-ferrous metals (see Table 1) made it difficult .. melting No. 1.

The proposed nickel-containing copper mixture was melted in a reflux furnace and the results are shown in the examples.

Example 2

Charge, wt.%: Sulphide concentrate 45, rich-sulphide ore 20, recycled materials (solid converter slag) 15, sandstone 15, cinder 5 downloads into a reflective furnace with a floor area of 252 m. Rich sulfide ore was loaded plus 1-50 class mm 80% and contained, h weight. %: copper 21.5, nickel 2.9, iron 34.7, sulfur 32.6.

The melting temperature conditions (gy were similar to those described in Example 1....

When the charge was melted, the foam-like film was washed off the surface of the charge slope and dissolved by the flow of sulphide melt obtained from the partial melting of rich sulfide ore on the surface of the slope.

This ensured the removal of the foam film from the surface of the slope and increased the heat consumption of the surface of the slope, as a result of which the melting increased and amounted to 5.1 t / m day.

Despite the presence in the initial charge of 25% of cinder and 5% of recycled materials, which contained 68.2% of oxides and ferrites of nickel and iron, this ensured the production of waste slag with a reduced content of magnetite (7.8%) and non-ferrous metals, Table 1), smelting 2. This was achieved by introducing lumpy rich sulfide ore of class plus 1–50 mm 80% into the charge, which, when the charge slope melted, rolled to the center of the furnace and melted on the slag surface.

In this case, the interaction of ferrites of nickel and iron with sulphide iron of matte obtained from the smelting of rich sulphide ore was ensured.

As a result of the use of the proposed mixture, the content of magnetite and non-ferrous metals in waste slag was reduced compared with the smelting of the ordinary mixture, (see Table 1) smelting No. 2.

Example 3

The mixture, wt.%: Sulfide concentrate 55, rich in sulfide ore 5, recyclable materials (solid converter shpak) 5 ,; sandstone 5 and cinder 30 were loaded into a reflective furnace with a hearth area of 252 m. The sulfide ore rich was loaded plus 1–50 mm class 80% and contained 22.1% copper, 3.4% nickel, iron 33.8%, sulfur 33 ,one%. The melting temperature of the mixture was similar to that described in Example No. 1.

When the charge was melted, the foam-like film was washed off the surface of the charge slope and dissolved in a sulphide melt flow (matte) obtained from melting rich sulfide ore.

This ensured the removal of foam-like film from the surface of the slope and increased the heat consumption of the surface of the slope, which contributed to an increase in the propell. As a result of this, the melt melted down 5.0 t / m

In spite of the presence in the initial charge of 15% of the current converter shpak and 5% of the cinder, which contained 49.1% of redox and ferrites of nickel and iron, ensured the formation of a dump plate with a low content of magnetite and non-ferrous metals. This was obtained by introducing into the charge a rich sulfide ore of class plus 1–50 mm 80%, which, when the charge slope was melted, rolled down to the center of the furnace and finally melted on the slag surface.

This ensured the interaction of ferrites of nickel and iron slag with sulphide iron of matte / obtained from the smelting of rich sulphide ore.

As a result of the use of the proposed charge, the content of magnetite and non-ferrous metals in waste slag was reduced as compared with the smelting of ordinary ore, (see Table 1), smelting IZ.

The workshops were conducted when in the initial charge of rich sulphide ore was 3%. At the same time, due to the lack of ore, on the slopes and on the surface of the slag bath, the melt decreased to 4.5., While the content of non-ferrous metals in the waste slag remained at the level of the usual charge smelting (table 1), smelting 4.,

Smelting was carried out when the initial charge was 25% rich in sulfide ore. At the same time, due to an increase in the share of ore, the heat transfer of the charge decreased, as a result of which the smelting increased and amounted to. 6,1 T / tt day The content of magnetite and non-ferrous metals in waste slag decreased (Table 1), smelting I 5 However, this matte turned out to be much poorer in the content of non-ferrous metals, due to a decrease in the proportion of inverse converter donor in the initial charge. This affected the performance degradation of the converter limit.

Smelting was carried out when ore was used in the initial charge.

smaller fractions, i.e. size plus 1 - 25 mm 80%.

The introduction of smaller fractions of ore into the initial charge ensured the melting of the bulk of the ore on the slope and faster washing off of the foam film with matte obtained from the ore smelting, as a result of which the smelting increased and amounted to 6.2 days. However, the ore fell on the slag surface less, thereby reducing its reducing ability to oxides and slag ferrites. In this case, the mattes were obtained much poorer, and the dump slag for the content of non-ferrous metals at the smelting level of the ordinary charge, (Table 1) smelting 6.

A similar situation was observed in the smelting of 7 cm tab.1, when in the initial charge there was 20% of rich sulfide ore.

Melting was carried out when the ore of larger fractions was used in the initial charge, i.e. size plus 1 -100 mm 80%.

At the same time, the bulk of the ore did not melt on the charge slope and, melted, rolled to the center of the furnace on the slag surface. At the same time in time of the next release

o dump pork from the oven, watched | pieces of ore hit the drain, thereby increasing the loss of valuable metals with waste donkeys (Table 1), smelting No. B, 5 A similar phenomenon was observed in smelting No. 9 (Table 1), when the initial charge was 5% rich in sulphide ore.

Formula inventions

The mixture of reflective smelting containing cinder, sulphide concentrate, sandstone, recycled materials, characterized in that, in order to intensify the smelting process and reduce the content of valuable materials in waste slag, it additionally contains a rich sulphide ore with a particle size of 1-50 mm 80% with the following ratio of components of the mixture, wt.%:

Sulfide concentrate 45-55 Rich sulfide ore 5-20

Circulating materials5-15

Sandstone 5-15

Ogarok Else.

Sources of information taken into account in the examination

1. Technological instructions for smelting and refining of the NGMK copper plant, 1976, p.8. Section Reflective fusion.

Claims (1)

Claim Reflective smelting mixture containing cinder, sulfide concentrate, sandstone, recycled materials / characterized in that, in order to intensify the smelting process and reduce the content of valuable materials in dump slag, it additionally contains rich sulfide ore with a particle size of plus 1 - 50 mm 80% in the next the ratio of the components of the mixture, wt.%: Sulfide concentrate 45-55 Rich sulfide ore 5-20 Revolving materials 5-15 Sandstone 5-15 5 Cinder Rest.