Method and apparatus for ore beneficiation

Abstract

To provide a method and apparatus for sorting ore. [Solution] An apparatus for which, when used for ore beneficiation, includes a separation unit that separates the feed into a product stream containing concentrated products and a leachate stream containing arsenic by a leaching process, an oxidation unit that generates an oxidation solution from the leaching stream, and a regeneration unit that regenerates reagents from the oxidation solution for reuse in the leaching process.

Claims

1. When used for ore dressing, A separation unit that separates the feed into a product stream containing concentrated products and a leachate stream containing arsenic by a leaching process. An oxidation unit that generates an oxidizing solution from the aforementioned leachate stream, and A regeneration unit for regenerating reagents from the oxidizing solution for reuse in the aforementioned leaching process. A device that includes this.

2. The apparatus according to claim 1, wherein the reagent used in the leaching process includes both a regenerated reagent from the regeneration unit and a fresh reagent from the supply source.

3. The apparatus according to claim 1 or 2, wherein the reagent is sodium hydroxide.

4. The apparatus according to any one of claims 1 to 3, wherein the separation unit includes a filter configured to extract a solid product from the leachate stream by a filtration process.

5. The apparatus according to claim 4, wherein the filter is a filter press equipped with a membrane aperture.

6. The apparatus according to claim 4 or 5, wherein the solid product comprises at least one of antimony, copper, gold, lead, nickel, and tellurium.

7. The apparatus according to any one of claims 1 to 6, wherein the separation unit includes a reuse loop for reusing at least a portion of the leachate stream.

8. The apparatus according to claim 7, wherein the separation unit separates the feed into the product stream and the leachate stream by washing, and the reuse portion of the leachate stream contains leachate wash.

9. The apparatus according to claim 8, wherein the reused leachate stream contains sodium sulfide.

10. The apparatus according to any one of claims 1 to 9, wherein the oxidation unit includes a pressure vessel configured to oxidize the leachate stream.

11. The apparatus according to any one of claims 1 to 10, wherein the oxidation unit includes a filter configured to recover further products from the leachate stream oxidized by the filtration process.

12. The apparatus according to claim 11, wherein the filter is a candle filter.

13. The apparatus according to claim 11 or claim 12, wherein the further product comprises at least one of gold, antimony, and tellurium.

14. The apparatus according to any one of claims 1 to 13, wherein the oxidation unit includes a condenser for condensing vapors generated during the oxidation process, and the condensate is transferred to the separation unit for reuse.

15. The apparatus according to any one of claims 1 to 14, wherein the regeneration unit includes a precipitation module for removing arsenic as a precipitate from the oxidizing solution.

16. The apparatus according to claim 15, wherein the precipitate is in the form of a calcium arsenate precursor.

17. The apparatus according to claim 15 or claim 16, wherein the reactant is added to the oxidizing solution in the precipitation module.

18. The apparatus according to claim 17, wherein the reactant is lime.

19. The apparatus according to any one of claims 15 to 18, wherein the precipitate module is configured to produce glass from the precipitate.

20. The apparatus according to any one of claims 15 to 19, wherein the precipitation module is configured to generate scorodite from the precipitate.

21. The apparatus according to any one of claims 15 to 20, wherein the precipitation module is configured to produce a geopolymer from the precipitate.

22. The apparatus according to any one of claims 1 to 21, wherein the regeneration unit includes a crystallization module that releases the reagent by crystallizing impurities.

23. The apparatus according to claim 22, wherein the crystallized impurity contains Glauber's salt.

24. The apparatus according to claim 22 or 23, wherein the crystallization module is configured to produce a sodium sulfate byproduct from the crystallized impurities.

25. The apparatus according to any one of claims 22 to 24, wherein the crystallization module includes a splitter configured to separate sodium sulfate into sodium hydroxide and a sulfate product for use as a reagent.

26. The apparatus according to any one of claims 1 to 25, wherein the regeneration unit includes an evaporation module configured to increase the concentration of the reagent by an evaporation process.

27. The apparatus according to any one of claims 1 to 26, further comprising a preparation unit configured to provide the feed to the separation unit with a predetermined arsenic content.

28. The apparatus according to claim 27, wherein the predetermined arsenic concentration is in the range of 0.5% to 5.2%.

29. The apparatus according to claim 27 or claim 28, wherein the raw ore material provided to the preparation unit is of low grade.

30. The feed is separated into a product stream containing concentrated products and a leachate stream containing arsenic by a leaching process. The steps of oxidizing the leachate stream to produce an oxidizing solution, and A step of regenerating the reagent from the oxidation solution for reuse in the aforementioned leaching process, A method for ore dressing that includes the following.

31. When used in ore dressing, A separation unit that separates the feed into a concentrate stream containing product solids and a leachate stream containing arsenic by a leaching process, and An oxidation unit that oxidizes the aforementioned leachate stream and recovers further products therefrom through a filtration process. A device that includes this.

32. The process involves separating the feed into a concentrate stream containing product solids and a leachate stream containing arsenic by a leaching process. The steps of oxidizing the aforementioned leachate stream, and A step of recovering further products from the leachate stream by a filtration process, A method for ore dressing that includes the following.

33. When used in ore dressing, A separation unit that separates the feed into a concentrate stream containing the product and a leachate stream containing arsenic by a leaching process, and A regeneration unit configured downstream of the separation unit regenerates reagents from the leachate stream for reuse in the aforementioned leachate process. A device that includes this.

34. The steps include separating the feed into a concentrate stream containing the product and a leachate stream containing arsenic by a leaching process, and A step of regenerating reagents from the leachate stream for reuse in the aforementioned leaching process, A method for ore dressing that includes the following.

35. When used in ore beneficiation, the apparatus includes a regeneration unit configured to recover caustic reagents from the leachate stream of the upstream leachation process, The playback unit, A precipitation module that generates a filtrate containing the caustic reagent through the reaction of the leachate stream and the lime supply source, A crystallization apparatus module for removing crystallized impurities from the filtrate, and An evaporation module that evaporates the remaining filtrate, thereby increasing the concentration of the caustic reagent for reuse in the upstream leaching process. A device that includes this.

36. A method for recovering caustic reagents from a leachate stream in an upstream leachation process used for ore beneficiation, A step of generating a filtrate containing the caustic reagent by reaction of the leachate stream and the lime supply source, The steps of crystallizing and removing impurities from the filtrate, The steps include: evaporating the remaining filtrate to increase the concentration of the caustic reagent for reuse in the upstream leaching process; A method that includes this.

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