A method for obtaining a metal salt from a spent lithium-ion (Li-ion) battery may include contacting a leaching solvent to a portion of the spent lithium-ion battery to form a first dispersion. The first dispersion is heated to a temperature in a range from 50 C. to 90 C. by applying microwave radiation. The temperature of the first dispersion is maintained to be in the range from 50 C. to 90 C. for a period in a range from 10 seconds to 5 minutes by further applying microwave radiation to the heated first dispersion. The first dispersion is filtered to obtain a first filtrate. The first dispersion is then filtered to separate undissolved material from a first filtrate. The undissolved precipitate is dehydrated to obtain the black mass.

A process for recovery lead including providing lead-bearing material. The lead-bearing material includes lead sulfate (PbSO.sub.4). The lead-bearing material is heated resulting in the formation of gaseous sulfur compounds and lead oxide. The gaseous sulfur compounds and the lead oxide are separated. The lead oxide is lanced with a hydrocarbon resulting in the formation of lead (Pb) and carbon dioxide (CO.sub.2). The lead and the carbon dioxide are separated.

A method for the incineration of waste containing fluorine and noble metals in a chamber furnace, the fluorine content of the waste lying in the range of >5 to 70 wt. %, and the noble metal content of the waste lying in the range of 0.1 to 30 wt. %, and the furnace chamber of the chamber furnace being lined with a chromium corundum material comprising 80 wt. % alpha-Al.sub.2O.sub.3, 1 to 20 wt. % Cr.sub.2O.sub.3 and 0 to 5 wt. % SiO.sub.2.

A product and method for producing a valuable material product from industrial dust having the steps of providing the industrial dust, which has at least one valuable material and a first concentration of volatile constituents, to a heating device with an operating temperature of 600 C. or more, preparing the industrial dust by means of the heating device, wherein the preparation comprises heating the industrial dust at a rate of 20 C./min or more, thermally treating the industrial dust by means of the heating device at a treatment temperature in the range from 900 C. to 1200 C., in particular in the range from 1000 C. to 1100 C., for 30 minutes or more, and controlling and/or regulating the oxidizing conditions during the preparation, wherein the preparation comprises at least partially removing the volatile constituents from the industrial dust, and providing the valuable material product.

Disclosed herein are a plant for recycling used batteries, in particular lithium iron phosphate (LFP) batteries, and a process for recovering valuable materials from used batteries.

An eco-friendly method for recovering lithium, including: dissolving cathode material powder having an olivine structure, obtained from a cathode of a waste lithium ion battery in an aqueous solution containing acetic acid at a concentration of 0.8 to 1.2 mol based on 1 mol of a cathode active material in the cathode material powder to prepare a solution; adding an aqueous solution containing hydrogen peroxide at a concentration of 0.4 to 0.6 mol based on 1 mol of a cathode active material into the solution to obtain a lithium-dissolved leachate and a leaching residue; separating the leachate from the leaching residue; and concentrating the leachate. By selectively leaching only lithium from the cathode material, lithium is recovered at a high yield. FePO.sub.4 is preserved for reuse as a raw material for lithium iron phosphate, productivity and economic efficiency are greatly improved, and waste water treatment is unnecessary.