14 results about "Flash smelting" patented technology

The application discloses a method for comprehensively treating red mud and integrating with an alumina production process to realize step-by-step energy utilization, and belongs to the technical field of metallurgy and resource recycling. The method specifically comprises the following steps: oxygen, water vapor, coal powder and red mud powder are sprayed into a flash smelting furnace from a burner at the top of a coal gasification flash smelting furnace, high-temperature heat and high-reducing gas generated by coal gasification are utilized to directly smelt and reduce Fe2O3 in the red mud to produce molten iron, and after the red mud and the coal powder liquid slag are tempered, rock wool or other fiberized materials are directly produced, sodium oxide in the red mud is converted into sodium hydroxide for recycling and reuse; after smelting is completed, high-temperature coal gas waste heat is recovered to produce steam for use in an evaporation section of an alumina production process, coal gas is used in a roasting section of the alumina production process, and roasting tail gas is used for red mud drying. The application realizes integration of red mud treatment and the alumina production process and process reengineering, meets the energy needs of two process courses through clean and efficient step-by-step utilization of coal, realizes energy saving and emission reduction, and has no secondary pollution.

The present invention relates to a furnace having an inner surface (2) comprising copper. The inner surface (2) comprises at least one steel insert (1), the at least one steel insert (1) creating a protrusion extending from the inner surface (2). The present invention also relates to a cooling element (17) for a furnace comprising at least one steel insert (1) creating a protrusion extending from the cooling element (17). The present invention also relates to a method for generating an autogenous protective layer on the inner surface (2) of a furnace and to the use of the furnace in a direct iron reduction process, electric smelting process, electric reduction process, flash smelting process, flash converting process, bath smelting process or bath converting process.

The invention provides an enhanced coupling smelting and slag electromagnetic depletion method for a nickel-copper-containing multi-metal material, which comprises the following steps: pretreating a nickel-copper-based material, a flux, a reducing agent and an additive, and controlling the granularity and moisture; spraying the pretreated material into the furnace to carry out enhanced oxidation smelting of an alkaline slag system, so as to realize rapid melting, decomposition and slagging; the melt is subjected to deep strengthening oxygen-enriched smelting through a side blowing spray gun, and multi-metal nickel matte containing 5-10% of iron is obtained; and the molten slag is subjected to electromagnetic strengthening dilution, and valuable metals such as nickel and copper in the molten slag are recycled. By combining the enhanced oxidation smelting, the side-blown deep smelting and the electromagnetic depletion method, the problems that existing flash smelting raw materials are poor in adaptability, the side-blown smelting capacity scale is small, slag depletion is not thorough and the like can be solved, and the method has the advantages of being high in raw material adaptability, low in energy consumption, high in valuable metal recovery rate and the like; and efficient, green and low-carbon comprehensive utilization of complex low-grade nickel-copper-based resources can be realized.

The present invention relates to a furnace comprising a wall having an inner surface (2) comprising a plurality of bricks (102) and / or compressible ramming mass (103) and a plurality of first steel inserts (104). The first steel inserts (104) are arranged between the bricks (102) and / or compressible ramming mass (103). The present invention also relates to a cooling element comprising a plurality of bricks (102) and / or compressible ramming mass (103), a plurality of first steel inserts (104), a method for generating an autogenous protective layer on an inner surface (2) of the furnace and to the use of the furnace in a direct iron reduction process, electric smelting process, electric reduction process, flash smelting process, flash converting process, bath smelting process or bath converting process is provided.

The invention belongs to the technical field of copper smelting, and particularly relates to a copper flash smelting control method, which comprises the following steps of: calculating process indexes in a burdening list adjustment stage, ensuring that each burdening meets key process indexes such as heat balance and flue gas balance, finely adjusting the process indexes according to the components of dry concentrate in a furnace during actual production, and controlling the smelting speed of the copper. And furnace condition fluctuation can be effectively reduced, and smelting stability is guaranteed. Material storage information is accessed in the production stage, and batching list calculation can be performed in advance according to the stock of materials, so that continuous production is ensured. The material storage information is accessed in the batching list adjustment stage, material execution can be guaranteed while reasonable batching is performed, storage management and batching list adjustment are combined, and the reliability of decision making is improved.

The application discloses a method for realizing iron circulation and copper reinforced recovery in a one-step copper smelting process of low-iron copper concentrate, which comprises the following steps: directly pouring smelting slag produced by mixing low-iron copper concentrate with iron ore powder and smelting by a one-step copper smelting method into a reduction smelting furnace, adding appropriate amount of reducing agent blocks and slagging agents, forming copper-iron alloy after reduction and purification, and naturally separating and settling the copper-iron alloy in the furnace, returning the obtained copper-containing molten iron at the lower layer to a flash smelting furnace for reuse, and directly selling the upper layer molten slag after water quenching as tailing slag. The application returns the copper-containing molten iron at the lower layer to the furnace, solves the problem that the copper-iron alloy is difficult to apply, replaces part of iron-containing raw materials for slagging, realizes iron circulation, returns the molten liquid directly, avoids heat loss as much as possible, indirectly saves energy consumption, and makes the melts more easily contact, which is beneficial to smelting and slagging reactions.

To mitigate the risk of increasing the proportion of recycled raw materials in the main metal component. In a flash smelting furnace in which the high-temperature melt generated by reacting raw materials with oxygen in the reaction tower (2) is separated on the hearth of the settling tank (3) into a matte layer (3a) containing a sulfide of a given metal, i.e., matte, and a slag layer (3b) existing on the matte layer, the furnace is equipped with: a given ramp region (S2) provided on the hearth (S) to guide the molten metal of the given metal, which remains in the lower part of the matte layer without sulfidation, toward one side of the furnace wall (3W) of the settling tank; and metal discharge ports (Hc, Hc) formed on the furnace wall to extract the molten metal accumulated at the bottom of the ramp region out of the furnace.

The present invention relates to a furnace having a roof comprising an inner surface (2). The inner surface (2) of the roof comprises at least one steel insert (1) arranged at the periphery of the inner surface (2) of the roof, the at least one steel insert creating a protrusion extending from the inner surface (2) of the roof. The present invention also relates to a cooling element for a furnace comprising at least one steel insert arranged at its periphery and to the use of the smelting furnace in a direct iron reduction process, electric smelting process, electric reduction process, flash smelting process, flash converting process, bath smelting process or bath converting process.

This invention discloses a method for reducing the Fe3O4 content in the slag of a copper or nickel flash furnace settling tank. The method includes the following steps: injecting a reactive substance through a spray gun, the reactive substance reacting with the Fe3O4 in the settling tank slag to generate FeO·SiO2 and SO2; wherein the Fe3O4 content in the settling tank slag is 20-25%; the reactive substance is copper concentrate; or nickel concentrate; or a mixture of copper concentrate and pulverized coal. This invention reduces the level of iron(III) oxide (Fe3O4) in the settling tank slag by uniformly spraying copper concentrate and pulverized coal onto the surface of the molten pool of the settling tank using interactive and reduction reactions, thereby reducing the copper content in the flash smelting slag and the copper content in the subsequent slag beneficiation tailings; uniformly spraying nickel concentrate onto the surface of the molten pool of the settling tank, again using interactive and reduction reactions to reduce the level of iron(III) oxide (Fe3O4) in the settling tank slag, thereby improving the slag depletion efficiency of nickel smelting, reducing the nickel content in the depleted waste slag, and thus improving the overall copper and nickel recovery rate in the smelting process, enhancing the economic benefits of smelting enterprises.

The present invention reduces risk when there is an increase in the charging ratio of a recycled raw material mainly composed of metal. This flash smelting furnace is for separating a high-temperature melt produced by reacting a raw material with oxygen in a reaction shaft 2 into a matte layer 3a containing matte, which is a sulfide of a prescribed metal, and a slag layer 3b existing above said matte layer on a furnace bed of a settler 3. The flash smelting furnace comprises: a prescribed slope area S2 provided on the furnace bed S to guide a molten metal, which is the molten product of the prescribed metal that has remained at the bottom of the matte layer without undergoing sulfurization, to the side of a furnace wall 3W of the settler; and metal tap holes Hc, Hc formed in the furnace wall to extract the molten metal stored at the bottom of the slope area out of the furnace.

The application relates to the technical field of smelting furnaces, in particular to a novel high-strength flash smelting furnace reaction tower structure, which comprises a reaction tower body composed of multiple layers of cylinder bodies and copper water jacket layers, further comprises multiple layers of adjusting water tanks, the adjusting water tanks are connected with the cylinder bodies through supporting columns, the adjusting water tanks are connected with first water inlet pipes, and the adjusting water tanks are used for adjusting the water speed of the copper water jacket bodies; and an impurity cleaning assembly is arranged in the adjusting water tank and is used for cleaning solid wastes in the adjusting water tank; the adjusting water tank is arranged outside the reaction tower, the copper water jackets are connected in series, water inlet pipes and water outlet pipes are further arranged on each copper water jacket and connected with the adjusting water tank, the water flow can be controlled through the adjusting water tank, and the cooling efficiency can be dynamically adjusted according to the temperature change in the reaction tower.

This invention discloses a flash metallurgical system based on photothermal power generation and photolysis hydrogen production. The photolysis hydrogen production system collects solar energy and produces hydrogen through photolysis of water. The flash smelting system uses the hydrogen produced by the photolysis hydrogen production system to smelt metals. The integrated compressed air energy storage and generation system generates electricity through a turbine air generator to power the flash smelting system. The automatic control system uses a PLC programmable logic controller to coordinate and control the photolysis hydrogen production system, the flash smelting system, and the integrated compressed air energy storage and generation system. This system mainly uses a high-temperature molten salt reactor as the direct heat source for flash metallurgy. The photolysis hydrogen production system produces the hydrogen required for the metal reduction reaction, eliminating the dependence of metal smelting systems on traditional fossil fuels and enabling more efficient and high-quality completion of the metal smelting process. The use of compressed air energy storage and a turbine air generator system replaces the traditional steam power generation system, reducing dependence on water resources.

A method of operating a flash melting furnace includes supplying lumps containing sulfur and having an average particle size of 5 mm or more into the flash melting furnace.

The application discloses a direct smelting process for treating lead paste of waste lead storage battery. The lead paste is converted into artificial lead concentrate with stable composition, appropriate granularity and dryness through physical and chemical pretreatment, and the artificial lead concentrate is adapted to process conditions of suspension flash smelting, so that efficient, clean and continuous treatment of the lead paste is realized.