SU845486A1 - Method of converting nickel, copper and copper-nickel mattes - Google Patents

Abstract

A METHOD OF CONVERTING NICKEL, COPPER AND COPPER-NICKEL STEELS in horizontal converters, including the flow of oxidative blowing into the matte layer, in order to increase the productivity of the converters and increase the level of the mainframe, if you need to work with the same template, you can use the same place to do the work. t on two parallel levels on either side of the neck. (O 00 4 SP 4 00 05

Description

The invention relates to the field of non-ferrous metallurgy and can be used in the processing of mattes in horizontal converters. There is a method of processing nickel, copper and nickel-copper matte in horizontal converters, including the flow of oxidative blowing - in the matte layer. The disadvantages of the known process are the lack of autogeny of the process, relatively low productivity and degree of extraction of metals. The purpose of the invention is to provide autogenosity of the process, increase the productivity of converters and increase the degree of metal recovery. The goal is achieved by the fact that in the known method of converting nickel, copper and copper-nickel mattes in horizontal converters, including the supply of oxidative blowing into the matte layer, the supply of oxidative blowing is carried out at two parallel levels on either side of the neck. The method is carried out as follows: A horizontal converter, which is in an inoperative position, pours matte. After a set of matte, the oxidizer is blown into the converter by two parallel levels on both sides of the throat and turned into the working position to blow the melt. The turn of the converter is done to a position where the top tuyere is buried in the bath. 300-350 mm. This condition is feasible for standard horizontal converters with a capacity of 40 to 100 tons. During the purge process, slag-forming (| pulses and cold materials) are loaded into the converter through the throat. As the converter accumulates in the converter, the upper furm matte layer. When slag is received, the converter is turned to slag discharge and, when it comes out of the lower tuyere stock melt, the flow is stopped to blow. Slag discharge is effected immediately without melting sludge. After the slag is drained and filled The matte pSP1I of the purging operation is repeated. composition,%: copper 9.4; nickel 12.3; cobalt 0.43; iron 51.4; sulfur, oxygen, etc. The blast was fed through all the tuyeres and the converter was put into working position to blow the melt. The penetration of the lower row into the melt of the tuyeres was 500 mm, the upper - 350 mm. In the process of blowing matte into the converter, slag-forming fluxes and cold materials were burnt. Their loading was made through a mouth under the blast. Flow blow when purging 740. In the process of purging emissions of the melt from the neck of the converter was not observed. The process temperature was measured by a radiation pyrometer, sighted to a molten bath under the neck, and amounted to 1240 C. 30 minutes after the start of the purge, the converter was turned off to bury the top row of tuyeres by 50-70 mm. 45 minutes after the start of the purge, the converter was blown out of the slag. Blowing was stopped after exiting from the melt the bottom row of tuyeres. Slag was discharged immediately. After the slag was drained and 40–40 tons of matte were poured into the converter, the purging operations were repeated. A total of 3 blowdowns were conducted during the recruitment period After the slag was drained from the third purge, the converter was placed under the blast to brew matte. The condition of the neck did not require its processing. The duration of the set period (taking into account the time of slag discharge and pouring into the matte converter) was 3 h 55 min; frequent time to blow 2 h 15 min. Feinstein matte boiling period, including the slagging and slag operation

matte, continued for 1 hour and 10 minutes; net blow time - A5 min.

The entire melting time was 5 h 05 min; net time to blow 3 hours

Processed for melting 150 tons of matte.

Converter performance by

matte accounted for 0.83 ton / min.

  I oU

Extraction of metals in Feinstein,%: copper 87.6; nickel 86.7; cobalt 39.3. 71.7 tons of matte are falling.

The application of the method allows to increase the productivity of the converter on matte by 24% compared with the existing method, to increase the extraction of metals into the matte by

454864

1.4% and increase the output of matte by 12%.

The method provides autogenous process management, i.e., without additional flooding as compared to the prototype.

The organization of the settling zone under the throat of the converter improves the working conditions by eliminating

10 surface melt emissions

bath, allows to produce sludge melt in the process of mass purging, which increases the efficiency of this slag depletion method and together with

15 elimination of emissions increases the extraction of metals in Feinstein (blister copper).

Claims (1)

METHOD FOR CONVERTING NICKEL, COPPER AND COPPER-NICKEL MATTE in horizontal converters, including the supply of oxidative blast to the matte layer, characterized in that, in order to ensure the autogenousness of the process, increase the productivity of the converters and increase the degree of metal extraction, the oxidative blow is fed into the oxidizing blast on two parallel levels on either side of the neck. SU .. „845486 ί