SU1601158A1 - Method of processing sulfide copper-zinc raw materials - Google Patents

Abstract

This invention relates to non-ferrous metallurgy, in particular to the processing of copper-zinc raw materials. The goal is to increase the selectivity of separating zinc from copper and reducing its content in copper concentrate. Copper-zinc sulphide feedstock is subjected to oxidative roasting to sulfur content less than 1%, the subsequent segregation roasting with the addition of carbon-containing reducing agent and chlorinator is carried out with oxygen-containing gas with an oxygen flow rate of 10-25 nm ³ / t zinc in the feedstock. 1 tab.

Description

The invention relates to non-ferrous metallurgy and can be used in the processing of copper-zinc raw materials.

The purpose of the invention is to increase the selectivity of separating zinc from copper and reducing its content in the copper concentrate.

The method is described in the following way.

The copper zinc sulphide feedstock is subjected to the first stage. oxidative roasting to a residual sulfur content of 1.0 wt.% with simultaneous heating to 900–950 ° C due to the heat of combustion of sulfur. The second stage, segmented calcination, is carried out in an unheated reactor, where a candle of the preceding stage flows, a chlorine radiator is introduced, a reducing agent is created and a proper gas is created. Phase introduction of oxygen. After segregation firing, the material enters for enrichment by flotation methods.

for the consumption of rich copper-oh concentrate and zinc-containing tailings. When conducting segregating roasting with the supply of oxygen-containing gas with an oxygen consumption of 10-25 zinc in the raw material occurs. chlorination of copper compounds and subsequent recovery of chlorides, while zinc segregation is not observed.

An example. Copper-zinc sulfide raw materials containing, in wt.%: Copper 5; zinc 15; sulfur 33 is subjected to oxidative roasting in a KS kiln to produce an calcine having a residual sulfur content of 0.15% by weight.

Segrenga calcination of calcine is carried out in an integrated laboratory tubular rotary kiln with a capacity of 1-1.5 kg / hr. 2% sodium chloride and 2% coke are added as reagents. Oxygenated gas is fed to the furnace at a rate of oxygen

(L

O5

sd

00

w shnka in raw materials. The composition of the gas. Howling phase is controlled during the opyg.

Cinders after segregation roasting (| shot with a mixture of butyl xanthate and butyl aeroflot at pH; the yield of copper concentrate is 13–15%; its content in copper is 45%, c | 1 nca 5%.

The recovery of copper and zinc into copper concentrate was 9% 7 and 4%, respectively.

The results of a series of experiments are shown in table.

Thus, the invention will increase the degree of selectivity about the separation of copper from copper and reduce its

content in concentrate from 30-33 to 4-5%.

Claims (1)

The invention The method of processing sulphide copper-zinc raw materials, including oxidative roasting to a sulfur content in the cinder less than 1%, subsequent segregation firing with the addition of carbonaceous reducing agent and chlorinator and flotation enrichment of the calcine with calcification of copper concentrate, o. - l and h and y and i. with what to increase the selectivity of separation. IJ of zinc from copper and reduction of its content in copper concentrate, segregation; the annealing is carried out with oxygen supply; Containing gas with an oxygen consumption of 10–25 nm 3 / t of zinc in the raw material. O (roasting 95.5 leads in recovery- 95.45 ovites are Noah arho- 95, t5 sphere) thirty 25 15 ten 80.2 3q, 5 78.3 82.1 95.2 95.3 95.8 95.7 95.5 95.8 95.6 95.1 95.7 95.5 95.3 95.15 95.8 96.3 94.1 95, one Known way95, 37 39.039, g 22.3 40, t21,0 38,519I The proposed method 30.27 4.23.7 13.3 3.8. 15.0 4,014,7 2.813.9 95, .5 4.64.1 15.0 3,713,0 4,0,14,1 4,214,8 95.5 2.73.25 12.9 3,513,0 3.9, 13.9 2.913.1 95.58 4.04.5 13.8 3,512.9 5,014,9 4,515,1 95.32 gy, 025.35 1 /:, 8 25,319,3 28.517,5 27.618.0 PRI and e h a The elucidation of end nitrate is evaluated to the product, according to the behavior of the plant, Rb | ductor H, Gunko Compiled by L. Koltsova. Tehred M.DidykKorrektor S.Cherni 30.8 33.7 33 ,. one 5.6 4.5 4.3 3, .ff 4.9 4.7 4.8 four, 3.8 4.8 4.9 4.0 4.8 4.7 4.9 4.9 29.9 22.2 28.7 26,8