New technology for recovering antimony from antimony-containing gold concentrate

Abstract

The invention relates to a new technology for recovering antimony from antimony-containing gold concentrate. The technology comprises the steps of pulping, leaching, press filtration washing, electrodeposition and waste liquid treatment. The technology overcomes restriction of electrodeposition of traditional wet antimony making technologies on a high antimony raw material through high concentration leaching and antimony-containing liquid circulating enrichment, solves the restriction of traditional smeltery roasting-cyaniding technologies on the antimony-containing gold concentrate raw material, and guarantees the technology stability and continuity through adopting a high efficiency device and technologic link technologic index control.

Description

Technical field [0001] The invention relates to a new process for the pretreatment of antimony-containing gold concentrate, and belongs to the field of metallurgy and chemical industry. Background technique [0002] Antimony (Sb) is a silver-white brittle metal. It is an acid-resistant substance at room temperature. It is a metal with a wide range of uses. It is known as "the hero of fire and fire protection", "strategic metal", and "metal hardener" , "Protective agent for fluorescent tubes and electron tubes". [0003] At present, in the production process of gold smelting enterprises, antimony is a harmful element. The presence of this element not only affects the quality of the roasting product, but also affects the cyanide leaching index and reduces the recovery rate of Au and Ag. The existing metal antimony production methods can be divided into two categories: fire method and wet method. Fire method of antimony smelting mainly includes precipitation smelting and roasting-red...

AI Technical Summary

Problems solved by technology

[0003] At present, antimony is a harmful element in the production process of gold smelting enterprises. The existence of this element not only affects the product quality of roasting, but also affects the cyanide leaching index and reduces the recovery rate of Au and Ag.

However, the existing metal antimony production methods can be divided into two categories: fire method and wet method. The fire method antimony smelting methods mainly include precipitation smelting and roasting-reduction smelting. The main defect of fire method antimony smelting is SO 2 Severe pollution, difficult treatment and low recovery rate. In the smelting process, due to the large number of returned materials, the direct recovery rate and recovery rate of metals are not ideal, which affects the technical and economic indicators of smelting and greatly affects the economic benefits of the enterprise.

[0004] And existing wet antimony method also has a lot of problems: 1) in the sodium sulfide leaching-sodium thioantimonite solution electrodeposition method, sodium sulfate, sodium thiosulfate, sodium sulfite and sodium thioantimonite accumulate seriously, The amount of waste liquid treatment is large and complicated, the current efficiency is low, and the power consumption is high; 2) The hydrogen reduction method of sodium thioantimonite leaching solution is technically feasible, but this method has slow reduction speed and antimony method caking reaction Tube wall and other problems; 3) FeCl 3 In the leaching-electrodeposition method, the accumulation of impurities in the solution is faster, the anion exchange membrane is more expensive and the loss is faster, and the electrodeposition control conditions are harsh; the separation of As and Au in the leaching residue is difficult, and the production cost is high; 4) Chlorination-hydrolysis method The process requires a large amount of water to dilute the solution, high acid consumption, large water consumption, and large reagent consumption, while the antimony recovery rate is low and the waste water discharge is large

Images