摘要:
A process for recovery of gold from an impure precious and base metal-bearing acidic chloride or mixed chloride/sulphate solution comprises the steps of contacting the acidic solution with a polymeric acrylic ester adsorbent ion exchange resin to selectively adsorb gold, and stripping the gold from the loaded resin by elution with water.
摘要:
A process for recovery of gold from an impure precious and base metal-bearing acidic chloride or mixed chloride/sulphate solution comprises the steps of contacting the acidic solution with a polymeric acrylic ester adsorbent ion exchange resin to selectively adsorb gold, and stripping the gold from the loaded resin by elution with water.
摘要:
A spark gap switch is disclosed. The spark gap switch comprises an anode and a cathode having facing surfaces separated by a predetermined gap, a trigger electrode located in the vicinity of such gap, and a piezoelectric generator connected between the trigger electrode and the cathode for triggering the spark gap switch.
摘要:
A process for the recovery of gold from a precious metal bearing sludge concentrate is disclosed. The process comprises the steps of leaching the sludge with hydrochloric acid and hydrogen peroxide to solubilize at least gold, palladium and platinum, removing silver from the leach slurry as insoluble silver chloride and selectively precipitating gold from the leach solution remaining after removal of silver by reduction with SO₂ in the presence of sodium ions.
摘要:
@ An apparatus for measuring bath temperature of metallurgical furnaces through a tuyere is disclosed. The apparatus comprises a periscope adapted to be inserted into a tuyere, a fiber optic cable having one end connected to the periscope for receiving radiation entering the tuyere from the bath of a furnace, and a two wavelength pyrometer connected to the other end of the fiber optic cable for analysing the radiations transmitted through the fiber optic cable to provide an indication of the temperature of the bath.
摘要:
A heat transfer device comprises a base wall of heat conductive material, a plurality of spaced apart fins formed integrally with the surface of the base wall at 30 to 40 fins per inch, and a plurality of indentations formed in the peripheral edge of the fins by a diamond knurling tool forming two series of parallel threads in the range of 40-80 threads per inch intersecting each other at an angle of 10 to 80 degrees.
摘要:
A zinc powder for use in a zinc anode, negative electrode or electrochemical cell comprising zinc metal or zinc alloy particles. The zinc particles have a narrow particle size distribution and a major portion of the having a well controlled chemistry and specific shape, such as teardrop, strand teardrop, acicular or spherical thereby providing improved discharge characteristics and reduced gassing. The powder can be produced by impulse atomisation.