The present invention relates to a method of treating lead anode slime having high fluorine and arsenic content, in particular to a method comprising smelting of the lead anode slime and cleaning the produced off gases in a one or more wet gas cleaning stages.

A process of treating a solid material containing lead and elemental sulphur, by feeding the solid material to a furnace containing a bath of molten slag under conditions such that elemental sulphur burns in the furnace to form sulphur dioxide and lead in the solid material is oxidized and reports to the slag, then removing a gas stream containing sulphur dioxide from the furnace, and finally removing a lead-containing slag from the furnace.

A process of treating a solid material containing lead and elemental sulphur, by feeding the solid material to a furnace containing a bath of molten slag under conditions such that elemental sulphur burns in the furnace to form sulphur dioxide and lead in the solid material is oxidized and reports to the slag, then removing a gas stream containing sulphur dioxide from the furnace, and finally removing a lead-containing slag from the furnace.

A method for recovering lead from lead-containing discarded electronic waste cathode ray tube glass includes the steps of taking a sample of cathode ray tube lead-containing funnel glass, crushing to obtain CRT glass powder, then uniformly mixing zero-valent iron powder with the CRT glass powder according to the mass ratio of 0.1-1.5:1, performing heat preservation at a temperature of 610-960 C. for 3-180 min, and further cooling to extract the metallic lead from a SiO.sub.2 reticular glass structure of the CRT glass. This can be applied to pretreatment of the lead-containing waste CRT glass, and the metallic lead is extracted from the reticular silicate structure of the lead-containing waste CRT glass by adding the zero-valent iron in the thermal treatment process so that disposal rate of electronic wastes is improved and ecological safety is ensured. This method has important environmental, social and economic significance and broad application prospects.

A method and an apparatus for recovering copper, bronze and lead by allowing methane gas to flow into a reactor and heat-treating a mixture of copper oxide, tin oxide and lead oxide under a temperature condition of 700-900 C. is disclosed. The method includes placing a mixture of copper oxide, tin oxide and lead oxide in a reactor, increasing the temperature inside the reactor, and allowing a reductive gas to flow into the reactor so as to heat-treat the mixture.

A method and an apparatus for recovering copper, bronze and lead by allowing methane gas to flow into a reactor and heat-treating a mixture of copper oxide, tin oxide and lead oxide under a temperature condition of 700-900 C. is disclosed. The method includes placing a mixture of copper oxide, tin oxide and lead oxide in a reactor, increasing the temperature inside the reactor, and allowing a reductive gas to flow into the reactor so as to heat-treat the mixture.

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 spent and/or decommissioned lead-acid accumulator treatment plant may include: a grinder configured to receive a plurality of the accumulators and to output ground heterogeneous material; and separator devices, wherein each separator device is configured to receive respective input heterogeneous material and to extract therefrom at least two respective output fractions, wherein each output fraction is homogeneous or less heterogeneous than the input heterogeneous material, wherein the input heterogeneous material is the ground heterogeneous material or is an output fraction of another separator device. A first separator device may be configured to extract pastel as an output fraction. A second separator device may be upstream of the first separator device and may include a settler and an elutriator, configured to be inputted an output fraction settled in the settler and to extract therefrom a first lead-based metal fraction as one of the output fractions of the second separator device.

A spent and/or decommissioned lead-acid accumulator treatment plant may include: a grinder configured to receive a plurality of spent and/or decommissioned lead-acid accumulators and to output a ground heterogeneous material; and a plurality of separator devices, wherein each of the separator devices is configured to receive a respective input heterogeneous material and to extract therefrom at least two respective output fractions, wherein each of the output fractions is homogeneous or less heterogeneous than the respective input heterogeneous material, wherein the respective input heterogeneous material is the ground heterogeneous material or is one of the at least two respective output fractions of another one of the separator devices. The plant further may include an air pressurizing device and at least one diffuser configured to diffuse compressed air generated by the air pressurizing device onto at least one of the output fractions of the separator devices.

A spent and/or decommissioned lead-acid accumulator treatment plant may include: a grinder configured to receive a plurality of spent and/or decommissioned lead-acid accumulators and to output a ground heterogeneous material; and a plurality of separator devices, wherein each of the separator devices is configured to receive a respective input heterogeneous material and to extract therefrom at least two respective output fractions, wherein each of the output fractions is homogeneous or less heterogeneous than the respective input heterogeneous material, wherein the respective input heterogeneous material is the ground heterogeneous material or is one of the at least two respective output fractions of another one of the separator devices. The plant further may include an air pressurizing device and at least one diffuser configured to diffuse compressed air generated by the air pressurizing device onto at least one of the output fractions of the separator devices.