System and methods for optimizing the efficiency of smelting copper concentrates

Patent metadata

Field	Value
Publication number	US-10081849-B2
Application number	US-201515502142-A
Country	US
Kind code	B2
Filing date	Aug 11, 2015
Priority date	Aug 11, 2014
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A method of operating a concentrator may comprise producing a final copper concentrate and periodically or continuously analyzing the produced final copper concentrate to obtain a grade value of the produced final copper concentrate. The produced final copper concentrate may be sent to a downstream smelting operation if/when the grade value of the produced final copper concentrate is at or above a minimum acceptable grade threshold and may be sent to a downstream hydrometallurgical operation capable of producing copper cathode, if/when the grade value of the produced final copper concentrate is below or falls below the minimum acceptable grade threshold.

First claim

What is claimed is:

1. A method of operating a copper concentrator comprising:
(a) providing a copper concentrator which is configured to produce a single copper concentrate stream from an ore body feed stream feeding the copper concentrator;
(b) producing the single copper concentrate stream from the ore body feed stream via the copper concentrator; the single copper concentrate stream feeding a downstream smelting operation or a downstream hydrometallurgical operation depending on a grade value of copper concentrate in the single copper concentrate stream; the downstream smelting operation and the downstream hydrometallurgical operation being provided downstream of a flotation circuit within the copper concentrator;
(c) periodically analyzing the copper concentrate to obtain the grade value;
(d) sending substantially all of the copper concentrate to the downstream smelting operation at times when the grade value is at or above a minimum grade threshold; and
(e) sending substantially all of the copper concentrate to the downstream hydrometallurgical operation, at times when the grade value is below or falls below said minimum grade threshold;
wherein the downstream hydrometallurgical operation is configured to produce copper cathode from the copper concentrate.

2. The method of claim 1 , wherein the minimum grade threshold is between approximately 10 and 25%.

3. The method of claim 1 , wherein the ore body feed stream comprises a mineralogy which varies over time; and wherein steps (d) and (e) occur after steps (a), (b), and (c) as a function of a percent change in the mineralogy of the ore body feed stream.

4. The method of claim 3 , wherein the percent change in the mineralogy is determined from one or more analyzers which are configured to detect relative changes in mineralogy of the ore body feed stream.

5. A method of operating a metal sulfide concentrator comprising:
(a) providing a metal sulfide concentrator which is configured to produce a single metal concentrate stream from an ore body feed stream feeding the metal sulfide concentrator;
(a) producing the single metal concentrate from the ore body feed stream, via the metal sulfide concentrator; the ore body feed stream comprising an ore body having a mineralogy which varies over time; the single metal concentrate stream feeding a downstream smelting operation or a downstream hydrometallurgical operation depending on a grade value or impurity concentration level of metal concentrate in the single metal concentrate stream; the downstream smelting operation and the downstream hydrometallurgical operation being provided downstream of a flotation circuit within the metal sulfide concentrator;
(b) determining a minimum acceptable grade threshold and/or a maximum acceptable impurity concentration threshold;
(c) periodically analyzing the metal concentrate to obtain the value or impurity concentration level;
(d) sending substantially all of the metal concentrate to the downstream smelting operation at times when the grade value is at or above the minimum acceptable grade threshold and/or if the impurity concentration level is below or falls below the maximum acceptable impurity concentration threshold; and
(e) sending substantially all of the metal concentrate to the downstream hydrometallurgical operation, at times when the grade value is below or falls below said minimum acceptable grade threshold and/or if the impurity concentration level is at or above the maximum acceptable impurity concentration threshold.

Assignees

• Smidth As F L

Inventors

• Chaiko David J
• Roy Gary

Classifications

• C22B15/0028

  Smelting or converting · CPC title

• C22B15/0095 Primary

  Process control or regulation methods · CPC title

• C22B15/0063

  Hydrometallurgy · CPC title

• F27D21/0014

  Devices for monitoring temperature · CPC title

• C22B15/006

  working up of molten copper, e.g. refining · CPC title