公开(公告)号：US20190338393A1

公开(公告)日：2019-11-07

申请号：US16508551

申请日：2019-07-11

Applicant: Techemet, LP

Inventor： Edward W. Albrecht ,  Steven D. McCullough

IPC: C22B23/02 ,  C22B11/02 ,  C22B7/00 ,  C22B7/04 ,  C22C19/03 ,  C22C30/02 ,  C22C38/50 ,  C22C38/42 ,  C22C38/34 ,  C22C38/00

Abstract: Converting process with slag separation and recycle to the converter. The process includes introducing converter feed into the pot holding a molten alloy pool, oxygen injection into the pool, tapping the slag, and tapping the PGM-enriched alloy. The collector alloy contains no less than 0.5 wt % PGM, 40 wt % iron, and 0.5 wt % nickel, and no more than 3 wt % sulfur and 3 wt % copper, and the recovered slag is separated into recycle and non-recycle portions. The recycle slag portion preferably contains more PGM than the non-recycle portion. The process can also include low- or no-flux converting; using a refractory protectant in the converter; magnetic separation of slag; partial pre-oxidation of the converter feed; smelting catalyst material in a primary furnace to produce the collector alloy; and/or smelting the converter slag in a secondary furnace with slag from the primary furnace.

公开(公告)号：US20190338392A1

公开(公告)日：2019-11-07

申请号：US16508615

申请日：2019-07-11

Applicant: Techemet, LP

Inventor： Edward W. Albrecht ,  Steven D. McCullough

IPC: C22B9/05 ,  C22B11/02 ,  C22C1/02 ,  C22C1/04 ,  C22B9/10 ,  C22C19/03 ,  C22B7/00

Abstract: Integrated PGM converting process. The process includes smelting a catalyst material in a primary furnace, smelting the primary furnace slag in a secondary furnace, converting the collector alloys from the primary and secondary furnaces in a converter to recover PGM enriched alloy and converter slag, separating the recovered converter slag into first and second converter slag portions, and supplying the first converter slag portion to the secondary furnace for smelting with the primary furnace slag. The process can also include low- or no-flux converting; refractory protectant addition; magnetic slag separation; partial feed pre-oxidation; staged slagging; and/or jacketing the converter.

公开(公告)号：US20190256949A1

公开(公告)日：2019-08-22

申请号：US16397441

申请日：2019-04-29

Applicant: Techemet, LP

Inventor： Edward W. Albrecht ,  Steven McCullough

IPC: C22B11/02 ,  C22B9/16 ,  C22B9/10

Abstract: A low-flux converting process for PGM collector alloy. The process includes feed introduction into a molten alloy pool, oxygen injection into the pool, tapping the slag, and tapping the PGM-enriched alloy. The collector alloy contains no less than 0.5 wt % PGM, 40 wt % iron, and 0.5 wt % nickel. If added flux material contains more than 10 wt % silica and 10 wt % CaO/MgO, the feed contains no more than 20 parts by weight added flux per hundred collector alloy. The process can also include using a refractory protectant in the converter; melting partially pre-oxidized collector alloy to form the initial molten alloy pool; magnetic separation of slag; recycling part of the slag to the converter; smelting catalyst material in a primary furnace to produce the collector alloy; and/or smelting the converter slag in a secondary furnace with slag from the primary furnace.