A method of using a chlorination method to recycle metal elements in lithium batteries includes, organic components in the lithium battery are removed, so as to obtain a mixture of powders containing the positive-electrode material; the powders are heated and chlorinated by chlorine, at a heating temperature of 500-1200 C.; gas products of the chlorination are output through a gas-solid filtration device, and then two stages of desublimation are used, wherein the temperature during the first-stage desublimation is set to be below 306 C. and above 178 C., so that FeCl.sub.3 is desublimated into solid deposition, which is used for recycling Fe element; the temperature of the second-stage desublimation is set to be below 178 C., so that AlCl.sub.3 is desublimated into solid deposition, which is used for recycling Al element; solid products of the chlorination are taken out for recycling the Li element.

A method of using a chlorination method to recycle metal elements in lithium batteries includes, organic components in the lithium battery are removed, so as to obtain a mixture of powders containing the positive-electrode material; the powders are heated and chlorinated by chlorine, at a heating temperature of 500-1200 C.; gas products of the chlorination are output through a gas-solid filtration device, and then two stages of desublimation are used, wherein the temperature during the first-stage desublimation is set to be below 306 C. and above 178 C., so that FeCl.sub.3 is desublimated into solid deposition, which is used for recycling Fe element; the temperature of the second-stage desublimation is set to be below 178 C., so that AlCl.sub.3 is desublimated into solid deposition, which is used for recycling Al element; solid products of the chlorination are taken out for recycling the Li element.

The present invention relates to a method for recovering lithium from a waste lithium secondary battery using a pyrometallurgical smelting method, which comprises a step for melting a waste lithium secondary battery containing nickel, cobalt, copper, and lithium, a flux having a melting temperature of 1,400 C. or less, and a lithium recovery agent to separate and obtain a slag, metal phase and lithium compound, wherein the lithium recovery agent includes at least one of chlorine and fluorine, and wherein the amount of each of nickel, cobalt and copper contained in the metal phase is more than 10 times compared to that of the slag.

A process for recovering a metal in the form of a metal halide from a metal-containing source is described, the process comprising the steps of: (i) forming a solid metal halide containing product by contacting the metal-containing source with a gaseous halide in an oxidising environment and at a temperature below the vaporisation temperature of the metal halide of interest; (ii) heating the metal halide containing product formed in step (i) to a temperature at or above the vaporisation temperature of the metal halide to form a gaseous metal halide containing product; and (iii) condensing the gaseous metal halide containing product of step (ii) to recover the metal halide of interest.

A process for recycling and reusing supported Pd membranes includes the separation of the Pd (or Pd alloy) layer from the support by contacting the Pd membrane with hydrogen under pressure and at low temperature and then with a second gas that is different from hydrogen. The Pd layer separated from the support can then be treated to solubilize the Pd and, where appropriate, the alloy metal(s) to obtain salts that can be reused, for example in the preparation of new Pd membranes. The recovered supports are also reusable.

A process, for the selective heavy metal removal from iron- and/or steelmaking flue dust, including steps of: preparing a feedstock (FS) by blending or mixing a chloride precursor material (CPM) and ironmaking and/or steelmaking flue dust including heavy metals (ISFD), the heavy metals including Pb and Zn and optionally Cd; in a first reaction step in a first reactor reacting the CPM with the ISFD by thermal treatment of the FS at a temperature in a range of 700 C. to 950 C. removing at least 70 wt. % of Pb from the ISFD; in a subsequent second reaction step in a second reactor further reacting the CPM with the ISFD by thermal treatment of the feedstock FS at a temperature in a range of 850 C. to 1200 C.; and obtaining a solid material after the second reaction step. The invention also relates to a plant implementing the process.

In a method for recovering transition metals from a lithium secondary battery, a lithium-containing mixture is separated from a waste lithium-containing mixture to prepare a transition metal-containing mixture. The transition metal-containing mixture is treated with a first acidic solution to produce a first leachate. Transition metals excluding nickel are extracted from the first leachate to produce a second leachate. The second leachate is treated with a second acidic solution to adjust its pH. A nickel-containing solid is produced from the pH-adjusted second leachate. The nickel recovery yield from waste lithium secondary batteries may be improved.

The present invention relates to a method for efficiently recovering valuable metals from end-of-life waste batteries in a dry smelting manner and, more specifically, to a lithium recovery method wherein a flux and a sulfur component are mixed with pulverized or smashed waste lithium battery cells, followed by melting at a high temperature of 1400 C. or higher, and then a lithium-sulfur compound (Li2S) volatilized therefrom is obtained.