A method for recovering zinc from slag derived from lead smelting comprises subjecting the slag to a leaching step under conditions in which zinc is dissolved into solution and silica present in the slag dissolves and re-precipitates in a form that is readily separable from liquid, and recovering zinc from the solution. The slag may be subjected to leaching in at least two stages in which in a first leaching stage only part of the zinc is removed from the slag and further zinc leaching from the slag occurs in a second stage to form a pregnant leaching solution and recovering zinc from the solution. The method may be used to remove SO.sub.2 from a gas stream by using the SO.sub.2-containing gas stream to leach a slurry of the slag.

A method for recovering zinc from slag derived from lead smelting comprises subjecting the slag to a leaching step under conditions in which zinc is dissolved into solution and silica present in the slag dissolves and re-precipitates in a form that is readily separable from liquid, and recovering zinc from the solution. The slag may be subjected to leaching in at least two stages in which in a first leaching stage only part of the zinc is removed from the slag and further zinc leaching from the slag occurs in a second stage to form a pregnant leaching solution and recovering zinc from the solution. The method may be used to remove SO.sub.2 from a gas stream by using the SO.sub.2-containing gas stream to leach a slurry of the slag.

This invention refers to a process for the production of products in the form of commercial zinc oxide and iron ecosinter, which are important raw materials for the production of SHG zinc (a special quality product) and pig iron, with subsequent obtaining steel. The process for producing zinc oxide concentrate and iron ecosinter uses as raw material zinc ferrite residues, steelmaking co-products such as light mud, heavy mud, iron scale, pre-lime and yard cleaning materials rich in iron and, mainly, steel mill dust (class I) mixed with carbon sources, whose mixture is homogenized and pelletized, followed by reduction in a pot furnace fed by insufflated air in ascending flow with temperature ranging from 850 C. to 1,300 C.; being the volatilized metals and the gases generated sent to a cyclone and bag filter where the zinc oxide is retained; the iron ecosinter is poured from the pot at the end of the process.

This invention refers to a process for the production of products in the form of commercial zinc oxide and iron ecosinter, which are important raw materials for the production of SHG zinc (a special quality product) and pig iron, with subsequent obtaining steel. The process for producing zinc oxide concentrate and iron ecosinter uses as raw material zinc ferrite residues, steelmaking co-products such as light mud, heavy mud, iron scale, pre-lime and yard cleaning materials rich in iron and, mainly, steel mill dust (class I) mixed with carbon sources, whose mixture is homogenized and pelletized, followed by reduction in a pot furnace fed by insufflated air in ascending flow with temperature ranging from 850 C. to 1,300 C.; being the volatilized metals and the gases generated sent to a cyclone and bag filter where the zinc oxide is retained; the iron ecosinter is poured from the pot at the end of the process.

A geothermally powered zinc production subsystem includes a geothermal system with a wellbore extending from a surface into an underground magma reservoir. A hopper receives a sphalerite ore that is crushed and provided to a flotation tank. The flotation tank is heated by a heat transfer fluid heated by the geothermal system, and a product of the flotation tank is used to prepare zinc.

A geothermally powered zinc production subsystem includes a geothermal system with a wellbore extending from a surface into an underground magma reservoir. A hopper receives a sphalerite ore that is crushed and provided to a flotation tank. The flotation tank is heated by a heat transfer fluid heated by the geothermal system, and a product of the flotation tank is used to prepare zinc.

The present disclosure relates to a method for manufacturing aluminium deox, aluminium powder, and zinc oxide in a single batch process. The method comprises feeding galvalume dross into induction furnace to melt the galvalume dross. The method includes extracting zinc oxide powder, aluminium deox and aluminium powder from the molten galvalume dross.

The present disclosure relates to a method for manufacturing aluminium deox, aluminium powder, and zinc oxide in a single batch process. The method comprises feeding galvalume dross into induction furnace to melt the galvalume dross. The method includes extracting zinc oxide powder, aluminium deox and aluminium powder from the molten galvalume dross.