A method for recycling zinc (Zn), wherein the method comprises the following steps: providing a feed composition; adding the feed composition to a rotary oven; heating the added feed composition for producing a first liquid molten metal phase and a first supernatant dross; adding aluminum (Al) to the first liquid molten metal phase, wherein a second supernatant dross and a second liquid molten metal phase are formed; adding at least one flux to the second liquid molten metal phase, followed by at least one segregation step in which the second liquid molten metal phase is removed from the rotary oven; casting the second liquid molten metal phase, or adding the removed second liquid molten metal phase to a casting furnace; casting the second liquid molten metal phase from the casting furnace; wherein the method further comprises the steps of: removing the second supernatant dross from the rotary oven; subjecting the removed second supernatant dross to at least one crushing step and at least one sorting step for separating at least one zinc fraction and at least one zinc oxide fraction from the second supernatant dross; and using the at least one zinc fraction for contributing to provide the feed composition.

A method for recycling zinc (Zn), wherein the method comprises the following steps: providing a feed composition; adding the feed composition to a rotary oven; heating the added feed composition for producing a first liquid molten metal phase and a first supernatant dross; adding aluminum (Al) to the first liquid molten metal phase, wherein a second supernatant dross and a second liquid molten metal phase are formed; adding at least one flux to the second liquid molten metal phase, followed by at least one segregation step in which the second liquid molten metal phase is removed from the rotary oven; casting the second liquid molten metal phase, or adding the removed second liquid molten metal phase to a casting furnace; casting the second liquid molten metal phase from the casting furnace; wherein the method further comprises the steps of: removing the second supernatant dross from the rotary oven; subjecting the removed second supernatant dross to at least one crushing step and at least one sorting step for separating at least one zinc fraction and at least one zinc oxide fraction from the second supernatant dross; and using the at least one zinc fraction for contributing to provide the feed composition.

A method and recovering method of recovering zinc oxides and other metal oxides having an injection chamber where a mixture of natural gas and oxygen is formed and then ignited to form high temperature combustion gases of greater than 2000 C. with a high concentration of carbon monoxide. Then, the mixture is transported through a quiescent chamber to a feed chamber where the ignited high temperature combustion gases are mixed with finely divided material, including EAF dust. The mixture is transported to a reaction chamber, wherein zinc vapor and other metal vapors and molten slag particles are formed. The zinc vapor and other metal vapors are separated from the molten slag particles and transported to an insulated plenum. Zinc vapor and other metal vapors are mixed with air and become airborne zinc oxide and other metal oxides. The airborne zinc oxide and other metal oxides are collected.

A method for recovering iron and valuable metals from electric arc furnace dust includes: an electric arc furnace dust treatment process of treating electric arc furnace dust to produce an intermediate product containing iron; an intermediate product treatment process of heating the intermediate product to a predetermined temperature range so that the intermediate product charged into a melting furnace is melted and reduced; and a recovery process of recovering metallic iron produced by reduction from the intermediate product and recovering valuable metals generated in the form of dust. The intermediate product treatment process includes a reducing agent charging process of charging a reducing agent containing carbon into the melting furnace to increase an amount of the metallic iron reduced from the intermediate product. The reducing agent is charged into the melting furnace at an equivalent ratio of 1.7:1 to 3.1:1 relative to iron oxide contained in the intermediate product.

A method for recovering iron and valuable metals from electric arc furnace dust includes: an electric arc furnace dust treatment process of treating electric arc furnace dust to produce an intermediate product containing iron; an intermediate product treatment process of heating the intermediate product to a predetermined temperature range so that the intermediate product charged into a melting furnace is melted and reduced; and a recovery process of recovering metallic iron produced by reduction from the intermediate product and recovering valuable metals generated in the form of dust. The intermediate product treatment process includes a reducing agent charging process of charging a reducing agent containing carbon into the melting furnace to increase an amount of the metallic iron reduced from the intermediate product. The reducing agent is charged into the melting furnace at an equivalent ratio of 1.7:1 to 3.1:1 relative to iron oxide contained in the intermediate product.

The present invention relates to separation and recovery of metals from ground alkaline batteries using anode mud (zinc electrolysis waste) and other manganese and zinc containing materials. The material commonly referred to as alkaline black (AKB) is solubilized into sulfate media and the manganese to zinc ratio is adjusted. The solution containing metals is processed using crystallization and ion exchange methods to produce manganese sulfate and zinc sulfate solutions for several possible applications.

A method for recovery of evaporable substances comprises melting (210) of a material comprising evaporable metals and/or evaporable metal compounds into a molten slag. The molten slag is agitated (212) by a submerged jet of hot gas. The hot gas is controlled (214) to have an enthalpy of at least 200 MJ/kmol, and preferably at least 300 MJ/kmol. At least a part of the evaporable metals and/or evaporable metal compounds are fumed off (216) from the molten slag. An arrangement for the method is based on a furnace with a plasma torch submerged into molten slag in the furnace.

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.

The invention discloses a treatment method of a chlorine-containing zinc oxide secondary material, which comprises the following steps: 1) leaching the chlorine-containing zinc oxide secondary material I through an acid solution; 2) selectively extracting zinc through di-(2-ethylhexyl)phosphoric acid (P204)-kerosene solvent; 3) implementing stripping-electrolysis zinc recovery; 4) repeating steps 1)-4); 5) taking out the raffinate obtained from the Step (4), mixing the residual taken out raffinate with chlorine-containing zinc oxide secondary material II when balance on chlorine ion input and taking out is achieved; carrying out liquid-solid separation; leaching the separated deposit through acid raffinate of the step 1); 6) after separated solution achieves preset conditions, purifying the chlorine-containing aqueous phase; 7) evaporating and concentrating to crystallize out KCl and NaCl products. The invention is environment-friendly and energy-saving, and free from process wastewater emission; production cost is greatly reduced and secondary pollution of the current dechloridation process is eliminated thoroughly.