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Process for leaching metal sulfides with reagents having thiocarbonyl functional groups

A thiocarbonyl functional, metal sulfide technology, applied in the preparation of sulfide/polysulfide, the preparation of cadmium compounds, cadmium sulfide, etc., can solve the problem of not showing the recovery of copper and so on

Active Publication Date: 2019-10-18
捷迪资源有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, thiourea has not been shown to recover copper from copper sulfide

Method used

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  • Process for leaching metal sulfides with reagents having thiocarbonyl functional groups
  • Process for leaching metal sulfides with reagents having thiocarbonyl functional groups
  • Process for leaching metal sulfides with reagents having thiocarbonyl functional groups

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0191] Example 1 Extraction of copper from chalcopyrite using thiourea

Embodiment 11

[0193] The effect of Tu on the electrochemical behavior of chalcopyrite electrodes was investigated in a conventional 3-electrode glass-jacketed cell. CuFeS 2 The electrode was used as a working electrode, a saturated calomel electrode (SCE) was used as a reference, and a graphite rod was used as a counter electrode. Use 600 and 1200 grit carbide sandpaper for CuFeS 2 The electrodes are polished. All experiments were performed at 25°C using a temperature-controlled water bath. The composition of the electrolyte is 500mM H 2 SO 4 , 20mM Fe 2 SO 4 and 0-100 mM Tu. Before starting any measurements, the solution was decontaminated with N 2 Bubble for 30 min to reduce dissolved O 2 concentration. The open circuit potential (OCP) was recorded until a change of no more than 0.1 mV / min was observed. After a stable OCP value was observed, electrochemical impedance spectroscopy (EIS) was performed at OCP using 5 mV a.c. sinusoidal perturbation from 10 kHz to 10 mHz. Self-lin...

Embodiment 12

[0198] Figure 4 is a bar graph showing the effect of initial Tu or FDS concentration on the electrochemical dissolution of chalcopyrite electrodes in sulfuric acid solution at pH 2 at 25°C. A concentration of 10 mM Tu in the leach solution resulted in a 6-fold increase in dissolution rate compared to no Tu; a concentration of 5 mM FDS resulted in a 6-fold increase relative to 10 mM Tu. A concentration of 10 mM Tu in the leaching solution also containing 40 mM Fe(III) resulted in a 30-fold increase in the dissolution rate compared to 40 mM Fe(III) alone.

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Abstract

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that hasa thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solutionthat does not contain the reagent, to produce a pregnant solution containing the metal ions.

Description

[0001] background [0002] This application claims priority to U.S. Patent Application Nos. 62 / 410,331, 62 / 410,348, and 62 / 410,351, filed October 19, 2016, and U.S. Patent Application No. 62 / 430,333, filed December 5, 2016. The contents of each of these applications are incorporated herein by reference. technical field [0003] The present disclosure relates to methods of leaching metals from ores containing metal sulphides. More particularly, the present disclosure relates to hydrometallurgical processes for the extraction of base metals from base metal sulfide-containing ores using reagents having thiocarbonyl functionality. The present disclosure further relates to the recovery of reagents having thiocarbonyl functionality from a pregnant leach solution for recycling to a hydrometallurgical process for the use of such reagents from base metal-containing Base metals are extracted from sulphide ores. The present disclosure still further relates to methods of recovering cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C01G11/02C01G3/12C01G53/11C22B3/20C22B3/26C01B17/20C22B15/00C22B17/00C22B23/00
CPCC01G49/14C01G3/003C01G3/10C22B3/04C22B15/0071C22B17/04C22B23/043C22B3/20Y02P10/20C01G11/003C01G53/003C22B3/08
Inventor 戴维·狄克逊爱德华·阿瑟里恩任子赫纳尔逊·莫拉·尔塔斯
Owner 捷迪资源有限责任公司
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