A raw material supply device that supplies a raw material into a flash smelting furnace and supplies first gas and second gas into the flash smelting furnace, includes: a first gas pathway that is provided in a lance and supplies the first gas into the flash smelting furnace; a raw material pathway that is provided out of the lance and supplies the raw material into the flash smelting furnace; a second gas pathway that is provided out of the raw material pathway and supplies the second gas into the flash smelting furnace; and a blade that is provided in the first gas pathway, has an inclined face with which the first gas is collided and revolves the first gas toward a lower side of the flash smelting furnace, the inclined face being inclined with respect to a flow direction of the first gas in the first gas pathway.

The invention relates to a method and to an arrangement for feeding fine-grained matter to a concentrate or matte burner (1) of a suspension smelting furnace (2). The arrangement comprising a fluidization arrangement (3) for feeding fluidized fine-grained matter into a dosing bin (4), and a conveyor means (6) for feeding fluidized fine-grained matter from the dosing bin (4) to the concentrate or matte burner (1) of the suspension smelting furnace (2), and a loss-in-weight controller (5) between the dosing bin (4) and the conveyor means (6). The arrangement comprises an impact cone (8) arranged below a filling valve (7) between the fluidization arrangement (3) and the dosing bin (4) for distributing fluidized fine-grained matter flowing from the fluidization arrangement (3) within the dosing bin (4).

Provided are smelting optimization methods and devices of copper-containing concentrate. The smelting optimization method includes: obtaining a water content and physical parameter of copper-containing concentrate powder; in response to the water content meeting a first preset condition, mixing the copper-containing concentrate powder with oxygen-rich gas to obtain a mixture, spraying the mixture into a smelting furnace by a nozzle; determining a first production parameter for producing matte based on the physical parameter, an oxygen content of the oxygen-rich gas and a gas temperature of the oxygen-rich gas; determining a second production parameter for producing matte by processing the physical parameter, the oxygen content of the oxygen-rich gas and the gas temperature of the oxygen-rich gas using a prediction model, wherein the prediction model is a machine learning model; and determining a target production parameter based on the first production parameter and the second production parameter.

An arrangement for feeding fine-grained matter to a concentrate or matte burner (1) of a suspension smelting furnace (2). The arrangement comprising a fluidization arrangement (3) for feeding fluidized fine-grained matter into a dosing bin (4), and a conveyor means (6) for feeding fluidized fine-grained matter from the dosing bin (4) to the concentrate or matte burner (1) of the suspension smelting furnace (2), and a loss-in-weight controller (5) between the dosing bin (4) and the conveyor means (6). The arrangement comprises an impact cone (8) arranged below a filling valve (7) between the fluidization arrangement (3) and the dosing bin (4) for distributing fluidized fine-grained matter flowing from the fluidization arrangement (3) within the dosing bin (4).

Provided herein is a method for smelting high-arsenic copper sulfide concentrate, which comprises the steps of: mixing the high-arsenic copper sulfide concentrate with quartz sand and CaO-containing material to obtain a mixed material; mixing the mixed material with oxygen-containing reactant gas and heating for reaction to obtain matte, slag and SO.sub.2-containing flue gas. By the addition of CaO and SiO.sub.2 in the smelting process, the concentrate material, the CaO and the SiO.sub.2 are allowed to react in the furnace under high temperature. The arsenic sulfides in the concentrate are oxidized first and then chemically react with slagging flux CaO to enter the slag phase in the form of calcium-based compounds of arsenic, iron arsenates and etc., thus reducing the arsenic content in the copper matte.

A method is provided for producing matte such as copper or nickel matte or crude metal such as blister copper in a suspension smelting furnace such as a flash smelting furnace or a flash converting furnace. Also provided is a suspension smelting furnace such as a flash smelting furnace or a flash converting furnace. The suspension smelting furnace comprises a reaction shaft, a settler in communication with a lower end of the reaction shaft, and an uptake shaft. The settler extending in two opposite directions from a landing zone for a jet of oxidized suspension below the reaction shaft in the settler so that the settler comprises a first settler part on a first side of the landing zone and a second settler part on an opposite second side of the landing zone.

A method and device for depleting copper smelting slag. The method comprises mixing copper smelting molten slag (1) with a reductant (2) and an inert gas (3) under pressure, and then depleting same. The device for depletion comprises a furnace body (4), which furnace body (4) is provided with a feed opening (413) and a slag discharge port (416), and gas nozzles (411) disposed on the side wall of the furnace body.

The invention relates to a suspension smelting furnace comprising a reaction shaft (1), an uptake shaft (2), and a lower furnace (3), as well as a concentrate burner (4) for feeding reaction gas and fine solids into the reaction shaft (1) of the suspension smelting furnace. The concentrate burner (4) comprises a fine solids discharge channel (5) that is radially limited by the wall (6) of the solids discharge channel, a fine solids dispersion device (7) in the fine solids discharge channel (5), an annular reaction gas channel (8) that surrounds the fine solids discharge channel (5) and is radially limited by the wall (9) of the annular reaction gas channel (8), and a cooling block (10) that surrounds the annular reaction gas channel (8). The cooling block (10) is a component that is manufactured by a continuous casting method. The cooling block (10) is attached to the arch (11) of the reaction shaft (1) and the wall (9) of the annular reaction gas channel (8), so that the discharge orifice (12) of the annular reaction gas channel (8) is formed between a structure (13), which is jointly formed by the cooling block (10) and the wall (9) of the annular reaction gas channel (8), and the wall (6) of the solids discharge channel. The invention also relates to a concentrate burner (4) for feeding reaction gas and fine solids into the reaction shaft (1) of a suspension smelting furnace.

The present invention provides a method of converting copper containing material to blister copper comprising: (a) providing copper containing material comprising copper sulfides and iron sulfides, whereby the copper containing material comprises at least 35 wt % copper of the total weight of the copper containing material; (b) reacting the copper containing material in a furnace with an oxygen containing gas, in the absence of flux, to effect oxidation of iron sulfide and copper sulfide, and controlling injection of the oxygen containing gas and the temperature so that the resulting converter slag is in a molten phase to obtain blister copper and converter slag.

The invention relates to a method and to an arrangement for refining copper concentrate. The arrangement includes a suspension smelting furnace comprising a reaction shaft, and a settler. The reaction shaft is provided with a concentrate burner for feeding copper concentrate such as copper sulfide concentrate and/or copper matte and additionally at least reaction gas into the reaction shaft to obtain a blister layer containing blister and a first slag layer containing slag on top of the blister layer in the settler, and a slag cleaning furnace. The arrangement includes a feeder configured for feeding blister from the blister layer in the settler and for feeding slag from the first slag layer in the settler into the slag cleaning furnace.