30 results about "Flash smelting" patented technology

A zero-carbon flash reduction ironmaking device comprises a reaction tower, the reaction tower is arranged upside down, a flash reduction area, an iron powder waste heat boiler and a green oxygen preheater are sequentially arranged in an inner cavity of the tower from top to bottom, oxyhydrogen powder entering the tower is subjected to oxyhydrogen combustion, mineral powder green hydrogen absorbs heat and is heated to the high temperature, and all hydrogen reduction reaction is completed before the mineral powder flows out of the flash reduction area. Iron powder is cooled through an iron powder waste heat boiler and a green oxygen preheater, hydrogen steam is cooled through a hydrogen steam waste heat boiler and a mineral powder preheater, and hydrogen water is separated through a cyclone dehydrator and a drying filter. The iron ore concentrate powder with the particle size smaller than 200 meshes falls into a powder bin, the reduction temperature ranges from 1100 DEG C to 1200 DEG C, the time for the ore powder to flow through a flash reduction area ranges from 2 s to 3 s, and the temperature for the ore powder to leave an iron powder waste heat boiler and the temperature for hydrogen steam to leave a hydrogen steam waste heat boiler range from 125 DEG C to 175 DEG C. The invention can be used for flash smelting of iron ore concentrate powder. The invention has the advantages of high waste heat recovery rate, long service life of the furnace lining, low energy consumption and zero carbon emission, and can avoid using the key management object coke ironmaking blast furnace device of the national two-high project.

The invention discloses an anode furnace flue gas treatment method and a treatment system thereof.The treatment method comprises the steps that copper concentrate is added into a flash smelting furnace to be smelted, and smelting furnace flue gas generated in the flash smelting furnace is sent to a waste heat boiler to be treated; the crude copper is added into an anode furnace to be subjected to oxidation reduction operation, oxidation process flue gas generated in the oxidation process is partially or completely conveyed to a salinization air pipeline of a waste heat boiler, and the rest of the oxidation process flue gas is conveyed to a flue gas desulfurization system to be treated; the flue gas in the oxidation process is conveyed to an inlet of a waste heat boiler through a salinization air pipeline and is uniformly mixed with the flue gas of the smelting furnace to obtain mixed flue gas, and then the mixed flue gas enters the waste heat boiler to be treated; and flue gas generated in the non-oxidation period in the anode furnace is conveyed to a flue gas desulfurization system to be treated. The flue gas generated by the anode furnace is introduced into the smelting boiler salinization air pipeline to be used as salinization air, recycling of the sulfur-containing flue gas is achieved, and the anode furnace flue gas treatment cost and the flue gas discharge amount of a desulfurization system are reduced.

The application discloses a pyrite suspension flash smelting device and method. The device is a three-furnace structure smelting device, the middle part of which is a suspension oxidation smelting furnace, the left side of which is an SO2 flue and an SO2 flue gas gravity settling chamber, and the right side of which is a reduction smelting bath and a reduction flue gas gravity settling chamber above the reduction smelting bath; the device combines the suspension oxidation smelting and the bath reduction smelting, is connected by a channel between the two smelting baths, and has the characteristics of high energy utilization efficiency of a reactor and non-interference of oxidation and reduction of two reactors. The pyrite suspension flash oxidation smelting is carried out by using pure oxygen and preheated pyrite powder, the smelting efficiency of the pyrite powder is improved, no special fuel is needed, carbon dioxide emission is reduced, one-step pyrite iron smelting is realized, the utilization rate of iron resources is improved, and environmental pollution is reduced.

The utility model discloses a membrane type water-cooled wall flash ironmaking device, and belongs to the technical field of green low-carbon environment-friendly metallurgy. The device is a coal gasification flash ironmaking device, the lower part of the device is an elliptical or rectangular molten pool, the left upper part of the molten pool is a flash smelting furnace, the right upper part of the molten pool is a gravity settling chamber, and the flash smelting furnace, the molten pool and the gravity settling chamber are all provided with membrane water-cooled wall structures. According to the device provided by the utility model, the refractory material can be effectively protected, and the service life of the flash smelting furnace is prolonged; natural circulation of cooling water of the water-cooled wall of the iron-making furnace is realized, and power consumption is reduced; the membrane type water cooling wall structure protects the refractory material and produces steam at the same time, waste heat recovery of cooling water is achieved, and the dust content in ironmaking tail gas is greatly reduced.

The invention discloses a sulfonium making and gold catching method based on a flash smelting furnace, a system comprises a material taking machine, a quantitative feeding scale, a belt conveyor, a drying machine, a weightlessness scale, a scraper conveyor and the flash smelting furnace, and the method comprises the steps that the material taking machine conveys copper concentrate at the speed of 260-305 t / h, and meanwhile the quantitative feeding scale adds gold and silver ore at the speed of 6-30 t / h for mixing; drying the mixture to obtain mixed powder; and then the powder is metered and then enters a flash smelting furnace through a pneumatic chute for reaction, and generated copper matte is discharged from a discharge chute. The system realizes efficient recovery of gold and silver, and is simple in process flow and convenient to operate. According to the method, the gold and silver-containing ore is used as a cold material to be added into the flash smelting furnace, excessive heat in the furnace is absorbed to optimize heat balance, and a quartz flux is replaced to improve slag type control; the raw material adaptability is expanded; the precious metal recovery value is improved; the process creates a new profit growth point for a smelting enterprise while stabilizing the furnace condition, and has remarkable economic benefits and process advantages.

This invention relates to the field of smelting furnace technology, specifically to an online temperature monitoring device for the reaction tower of a flash smelting furnace in copper smelting. The device includes a reaction tower body composed of multiple layers of cylindrical shell and a copper water jacket. A nozzle is installed at the top of the reaction tower body. It also includes thermocouples arranged in a circumferential array on the cylindrical shell; a mounting frame installed on the cylindrical shell; a positioning component installed within the mounting frame; and a self-locking mechanism installed on one side of the positioning component. This invention utilizes multiple sets of thermocouples arranged in a circumferential array on the reaction tower, with a temperature monitoring point set every 45°. Temperature data is uploaded to a DCS system and collected by a process internet platform intelligent scheduling and optimization system. This allows for real-time observation of the temperature and trends within the flash smelting furnace reaction tower. Based on these temperature changes, the reaction status within the furnace is determined. The intelligent scheduling and optimization system, combined with current production parameters, provides feedback and suggestions for adjusting operating parameters to prevent material segregation.

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 application provides a kind of suspension side-blown electric heat smelting furnace and iron-based mineral smelting method.The suspension side-blown electric heat smelting furnace includes integrated suspension reaction tower and sedimentation tank, the top of suspension reaction tower has the entrance of to-be-smelted mineral material, and the top and / or side are also provided with a plurality of first spray guns, the first spray gun is independently connected with at least one of reducing agent supply unit, fuel supply unit or oxygen-containing gas supply unit, and suspension reaction tower is used for making to-be-smelted mineral material to carry out suspension smelting reaction;Sedimentation tank has horizontal structure, along the length direction of sedimentation tank, sedimentation tank includes side-blown area and electric heating area which are communicated, the top of side-blown area is directly communicated with the bottom of suspension reaction tower;Side wall of side-blown area is provided with a plurality of second spray guns, and electric heating area is provided with heating electrode.The present application solves the problems of energy quality imbalance, high iron content in slag and low reaction efficiency in the current flash smelting process.

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 application discloses a reverse and direct coupling flash smelting furnace and method, and belongs to the technical field of metallurgy. The furnace body comprises a direct flow reaction zone, a reverse flow reaction zone and a molten pool zone. Larger particle size furnace charges enter the reaction from the reverse flow reaction zone, and smaller particle size furnace charges enter the reaction from the direct flow reaction zone. Reducing gas is introduced from the upper part of the direct flow reaction zone, and after the gas reacts with fine particles in the direct flow downward, the gas enters the reverse flow reaction zone to exchange heat with coarse particles in the reverse flow, and finally tail gas is discharged from the upper part of the reverse flow reaction zone. Molten materials are separated into molten iron and slag layers in the bottom molten pool and discharged respectively. The method couples the reverse flow and the direct flow, integrates the advantages of the two smelting modes, avoids the shortcomings of the two smelting modes, effectively improves the metal yield and the overall energy efficiency, and reduces the raw material grinding cost and the tail gas heat loss.

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.

This operating method for copper smelting is characterized in that it comprises: adding an S source to a matte generated by the reaction of a smelting feed containing a copper concentrate and a metal Cu-containing feedstock with a reaction gas in a reaction shaft of a flash smelting furnace when a metal phase of metal Cu is formed in the matte.

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.

The utility model discloses a radiation chamber inlet portion water cooling wall structure of a flash smelting waste heat boiler, which comprises a radiation chamber inlet portion water cooling wall composed of a tube plate type water cooling wall, and the tube plate type water cooling wall is composed of a steel plate and a plurality of heat exchange tubes laid on the outer side face of the steel plate. An anti-abrasion plate blocked in front of the first heat exchange tube at an inlet is arranged at the inlet of the radiation chamber inlet water cooling wall, the inner side face of a steel plate of the tube plate type water cooling wall forms a counter-fire face of the inner side of the radiation chamber inlet water cooling wall, and the counter-fire face of the radiation chamber inlet water cooling wall is a smooth surface. A nichrome film layer and a refractory material layer are sequentially arranged on the counter-fire surface of the water-cooled wall at the inlet part of the radiation chamber in the direction in the boiler, and a refractory material layer is also arranged on the outer side surface of the water-cooled wall at the inlet part of the radiation chamber in the waste heat boiler inlet expansion joint. The utility model has the advantage of long service life.

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.

A magnetic control green hydrogen flash reduction magnetite smelting device comprises a magnetic controller, a powder bin is arranged outside an inner cavity of a reaction tower, a round pipe at the bottom of the powder bin penetrates through a round hole in the center of a ball bearing neck bush of the magnetic controller, the magnetic controller comprises a plurality of sector-ring-shaped permanent magnets, the permanent magnets are distributed on a supporting disc in an annular array mode, and the intervals between every two adjacent permanent magnets are the same. The speed reduction motor drives the permanent magnet to rotate at a constant speed, magnetite concentrate powder falling into the powder bin and with the particle size smaller than 200 meshes is driven to rotate at a constant speed around the central axis of a round pipe at the bottom of the powder bin, the space stroke of the ore powder 1.0 m away from the bottom face of the permanent magnet in an inner cavity of the tower is prolonged, and the smelting temperature ranges from 1100 DEG C to 1200 DEG C. The invention can be used for flash smelting of magnetite concentrate powder. High-strength smelting is achieved, the green hydrogen utilization rate exceeds 90%, the energy efficiency and carbon efficiency index is advanced, and a coke smelting blast furnace device which is a key management object of a national two-high project can be avoided.

In this flash furnace operation method, a bulk material containing sulfur and having an average particle diameter of 5 mm or more is introduced into a flash 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.

To provide a method for smelting a copper concentrate in which a copper concentrate can be combusted at high strength in a self-melting furnace.SOLUTION: A method for smelting copper concentrate according to the present invention in which a smelting raw material including a copper concentrate and flux, which is supplied from an upper part of a reaction tower, falls toward a settler positioned below the reaction tower and is oxidized by gas for reaction supplied into the reaction tower to form matte and slag, where the average particle diameter of the flux is 40 μm or less.SELECTED DRAWING: None

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.

This invention belongs to the field of iron and steel smelting, specifically relating to a flash smelting furnace and method for high slag viscosity conditions. The flash smelting furnace for high slag viscosity conditions includes a furnace body comprising a reaction tower and an elongated hearth. The elongated hearth is located at the bottom of the reaction tower, communicating with and extending laterally outward from the bottom. A raw material feeding device for feeding ore powder and flux is located at the top of the reaction tower. The furnace body also has a reducing agent inlet and a flue gas outlet. The reaction tower contains a reduction melting zone, and the elongated hearth contains a molten pool to accommodate the molten iron layer and the slag layer. At the end of the elongated hearth furthest from the reduction melting zone, an iron tap and a slag tap are respectively located at positions corresponding to the molten iron layer and the slag layer. The elongated hearth provides sufficient time and space for slag-iron separation. The iron tap and slag tap located at the end furthest from the reduction melting zone ensure that the molten iron flows through the entire molten pool before being discharged from the furnace, effectively solving the problem of incomplete slag-iron separation in viscous slag.

A device for smelting hematite through magnetic control green hydrogen flash reduction comprises a magnetic controller, a powder bin is arranged outside an inner cavity of a reaction tower, a round pipe at the bottom of the powder bin penetrates through a round hole in the center of a ball bearing neck bush of the magnetic controller, the magnetic controller comprises a plurality of sector-ring-shaped permanent magnets, the permanent magnets are distributed on a supporting disc in an annular array mode, and the intervals between every two adjacent permanent magnets are the same. After a plurality of iron particles with the particle size of 1-3mm are added at one time, the speed reducing motor drives the permanent magnet to rotate at a constant speed, so that the iron particles suspend in the inner cavity of the tower to move circumferentially at a constant speed, the iron particles continuously collide with hematite powder with the particle size smaller than 200 meshes, the space stroke of the hematite powder in the inner cavity of the tower is prolonged by 1.0 m from the bottom surface of the permanent magnet, and the smelting temperature is 1100-1200 DEG C; the flash smelting method can be used for hematite concentrate powder flash smelting. High-strength smelting is achieved, the green hydrogen utilization rate exceeds 90%, the energy efficiency and the carbon efficiency are advanced, and a coke smelting blast furnace device which is a key management object of a national two-high project can be avoided.

The present application relates to a kind of zinc oxygen pressure leaching method combined with flash smelting process, comprising the following steps: the slurry obtained by grinding zinc concentrate is carried out oxygen pressure leaching to obtain first stage leaching liquid and first stage leaching residue;Neutralizing agent is added to the first stage leaching liquid, and supernatant and neutralizing residue are obtained by separation;The neutralizing residue is carried out flash smelting, and fuming is obtained Multi-chamber furnace zinc oxide, and the multi-chamber furnace zinc oxide is added to neutralizing stirring tank to replace part of the neutralizing agent to react;Iron powder is added to the supernatant and copper precipitation and dechlorination are carried out, the pH of supernatant is adjusted to carry out fluorine precipitation, zinc powder is added to carry out displacement reaction, and displacement liquid and displacement residue are obtained by filtration, iron removal is carried out to the displacement liquid, and new liquid and purification residue are obtained by purification, and metal zinc is obtained by electrodeposition of the new liquid.The present application not only can improve oxygen pressure leaching processing capacity, but also can improve the direct recovery rate of various valuable metals, resource utilization rate, and reduce environmental pollution.