초록 ▼

A process for the recovery of gold and the platinum group metals from sources that contain relatively low amounts of the metals is described. The process is environmentally acceptable and uses no expensive and potentially dangerous organic solvents. The process utilizes hydrogen chloride, sodium hyd

A process for the recovery of gold and the platinum group metals from sources that contain relatively low amounts of the metals is described. The process is environmentally acceptable and uses no expensive and potentially dangerous organic solvents. The process utilizes hydrogen chloride, sodium hydroxide, and cation resins to concentrate and purify the precious metals

대표청구항 ▼

A process for the recovery of gold and the platinum group metals from sources that contain relatively low amounts of the metals is described. The process is environmentally acceptable and uses no expensive and potentially dangerous organic solvents. The process utilizes hydrogen chloride, sodium hyd

A process for the recovery of gold and the platinum group metals from sources that contain relatively low amounts of the metals is described. The process is environmentally acceptable and uses no expensive and potentially dangerous organic solvents. The process utilizes hydrogen chloride, sodium hydroxide, and cation resins to concentrate and purify the precious metals ing nozzle (16) is arranged in an area where dust-contaminated air coming from the dust-contaminated supply channel (9) enters the annular channel (8). 10. The dust filter according to claim 8, wherein the at least one second washing nozzle (16) is arranged in the annular channel (8) and in an area where dust-contaminated air coming from the dust-contaminated supply channel (9) enters the annular channel (8). 11. The dust filter according to claim 8, wherein the at least one washing nozzle (16) is arranged in the annular channel (8). 12. The dust filter according to claim 7, comprising a washing system comprised of several liquid circuits (18, 19) for supplying the first and second washing nozzles (16) with the washing liquid. 13. The dust filter according to claim 12, wherein the washing system comprises a washing program control (20). 14. The dust filter according to claim 13, wherein the self-supporting filter tubes (5) are comprised of a self-supporting needled felt having a smooth surface, a high air permeability, and a wall thickness of less than 1 mm. 15. The dust filter according to claim 14, wherein the wall thickness is approximately 0.6 mm. 16. The dust filter according to claim 1, wherein the self-supporting filter tubes (5) have a diameter of less than 100 mm. 17. The dust filter according to claim 16, wherein the diameter is 40 to 50 mm. 18. The dust filter according to claim 1, wherein the self-supporting filter tubes (5) have a length of less than 4 m. 19. The dust filter according to claim 18, wherein the length is approximately 2 m. 20. The dust filter according to claim 1, wherein seven of the self-supporting filter tubes (5) form one of the filter bundles (7), respectively. 21. The dust filter according to claim 20, wherein a trace circle of the filter bundles (7) is less than 200 mm. 22. The dust filter according to claim 21, wherein the trace circle is approximately 170 mm.