108 results about "Pyrometallurgy" patented technology

The invention belongs to the technical field of pyrometallurgy and hydrometallurgy, and discloses an efficient leaching method for Joule thermal shock strengthened vanadium titano-magnetite. The Joule thermal shock strengthened vanadium-titanium resource efficient leaching comprises the steps that low-grade vanadium-titanium magnetite ore powder and a carbon source are mixed and then subjected to Joule thermal shock activation treatment, and an obtained activation product is leached through dilute acid or organic acid, so that valuable metal such as vanadium, titanium and iron can be efficiently leached out. Vanadium titano-magnetite and a small amount of carbon powder are subjected to Joule thermal shock, so that the valence state of metal ions is reduced, and the leaching activity of metal is improved. The Joule thermal shock strengthening low-grade vanadium titano-magnetite acid leaching method has the advantages of being high in activation efficiency, high in metal element leaching efficiency and the like.

The invention belongs to the technical field of thermometallurgy, and discloses a method for enriching and recovering germanium from germanium-containing lignite. The method comprises the following steps: pelletizing iron-containing minerals, germanium-containing lignite and a binder, carrying out reduction roasting on dried pellets at high temperature, reducing and volatilizing germanium in the roasting process, and collecting a volatile product GeO or GeS as a raw material for extracting germanium metal. The method for synergistically utilizing the iron-containing minerals and the germanium-containing lignite has the advantages of being short in process, high in operability, high in product value and the like.

The present application belongs to the technical field of waste lithium ion battery recycling, and discloses a method for preferentially extracting lithium from waste ternary lithium ion battery powder: waste ternary lithium ion battery powder is mixed with water, ammonium sulfate and concentrated sulfuric acid to form a slurry; the slurry is subjected to ripening treatment; the ripened material is ground and then water immersed to obtain a lithium-containing solution and a water immersion residue. The method for preferentially extracting lithium from waste ternary lithium ion battery powder combines pyrometallurgical and hydrometallurgical means, not only has low energy consumption, but also has a reaction system temperature far lower than the high temperature required by conventional pyrometallurgical processes; moreover, the method exhibits significant selectivity in the process of recovering lithium, which not only improves the recovery efficiency of lithium and reduces the interference of other metals, but also reduces the types and amount of required reagents. In addition, the method does not require complicated impurity removal means, and is a method for treating waste ternary lithium ion battery powder with low industrial cost and high return rate.

The invention relates to the technical field of heavy non-ferrous metal pyrometallurgy and process equipment, and discloses a large heavy non-ferrous metal bath smelting furnace heat flow accurate matching method and system, and the method comprises the steps: generating key state parameters, and completing the evaluation of the real-time heat state in the furnace; cooling water flow, heat source distribution and the like are used as control variables, comprehensive optimization of heat flow uniformity, structural safety and operation energy efficiency is used as a target for solving, and an optimal control instruction set is output; the optimal control instruction set is decomposed and issued to different execution layers, so that the heat dissipation intensity of each partition is adjusted; heat production-heat dissipation balance in the furnace is reconstructed, and matching of peak clipping and valley filling of heat flow distribution is achieved; after the new control action is executed, sensor data are collected. The system comprises a pump station, a variable frequency pump, a heat exchanger, a smelting furnace, a heat flow control unit, a temperature sensor, a flowmeter, a regulating valve and a control center. The smelting strength and the heat efficiency are improved on the premise of guaranteeing the service life of the furnace lining and the structural safety.

The invention relates to a device and method for detecting the liquid level height of melt in a copper pyrometallurgy slag ladle, and belongs to the technical field of metallurgy, the device comprises a plurality of infrared cameras in one-to-one correspondence with tank bodies, and further comprises an infrared control box and an upper computer, and the upper computer is externally connected with a dust removal system; the infrared cameras are arranged above the tank bodies and used for collecting infrared images of the tank bodies, all the infrared cameras are electrically connected with the infrared control box, the infrared control box is electrically connected with the upper computer, and the upper computer is electrically connected with a plurality of sound-light alarm devices which are in one-to-one correspondence with the tank bodies and used for alarming the liquid level heights in the tank bodies. The front end of the tank body is provided with an anti-shielding detection device used for detecting whether a transport vehicle passes by or not, and when the anti-shielding detection device detects that the transport vehicle passes by, the upper computer controls the dust removal system to be started. According to the invention, cinder ladle discharge monitoring can be realized, the safety risk of equipment and personnel is reduced, and the cinder ladle alternation efficiency is improved.

The invention discloses a method for cooperatively treating dross through graded smelting and oxidizing roasting, and relates to the technical field of pyrometallurgy, and the method specifically comprises the following steps: (1) smelting copper dross, and settling lead liquid to obtain lower-layer metal lead and upper-layer dross; and (2) putting the upper-layer dross into a converter, and sequentially carrying out oxidizing roasting and reduction smelting to obtain copper matte and lead bullion. According to the method, a two-stage process framework for improving the copper grade through smelting pot layering and converter deep lead removal is created for the first time, natural sedimentation layering of the lead liquid and the waste residues is achieved through the smelting pot by means of the density difference of molten substances, and metal and impurity phases are effectively separated; by means of the method, the lead liquid closed-loop circulation system improves the lead recovery rate to 97% or above, and the final copper grade of matte is improved to 55%-65%.

The invention is in the field of pyrometallurgy and describes a process for the recovery of lithium by fuming. The process comprises smelting Li-ion batteries or their waste in a furnace with slag formers, resulting in a molten bath with distinct alloy and slag phases, and flue dust. Notably, at least 30% of the lithium is transferred to the flue dust under the chosen conditions without adding alkali or earth alkali halides. Li can then be recovered from the flue dust, valuable metals, such as Co and / or Ni, can be recovered from the alloy, and the remaining slag can be used in new smelting or Li- fuming operations.

The utility model discloses a discharging device for molten slag of a nickel pyrometallurgy furnace, belongs to the field of pyrometallurgy furnace equipment, and solves the problems that a discharging chute of an existing nickel pyrometallurgy furnace occupies a large position, and different discharging chutes need to be arranged on different molten slag layers. The device comprises a discharge shell, two discharge channels are arranged in the discharge shell and penetrate through the two ends of the discharge shell, a surrounding cooling tank is further arranged in the discharge shell, and the water inlet end and the water outlet end of the cooling tank are connected with cooling pipes. The molten slag discharging device is simple in structure and stable in installation, discharging of the molten slag of different molten slag layers is achieved on the same device, water can be introduced for continuous cooling in the discharging process, the device can be continuously used, the molten slag can be cooled, workers are prevented from being scalded, and operability of discharging of the molten slag of the nickel pyrometallurgy furnace is improved.

The invention provides a metallurgical furnace for multi-stage smelting and dilution of copper-nickel sulfide ore, and belongs to the technical field of non-ferrous metal pyrometallurgy equipment. The device is provided with a first-stage space smelting area, a second-stage molten pool smelting area, a third-stage molten pool reduction smelting area and a fourth-stage depletion smelting area which are communicated in sequence; a feeding nozzle and a spray gun are arranged at the top of the first-stage space smelting area to realize material pre-oxidation and impurity volatilization, and a side-blowing spray gun is arranged in the second-stage molten pool smelting area to finish deep smelting and slag-matte separation; a third-stage molten pool reduction smelting area is provided with a spray gun to create a reducing atmosphere, and impurities such as lead and zinc are selectively reduced and volatilized to be removed; a controllable polarity electrode and a sulfuration reducing agent feeding hole are arranged at the top of the fourth-stage depletion smelting area, so that electromagnetic stirring, chemical reduction sulfuration and the like are realized. Through multi-zone collaborative design and functional coupling, the problems that in the existing copper-nickel sulfide ore pyrogenic process, the smelting strength is improved, the adaptability to raw materials is poor, the slag dilution efficiency is low, and impurity valuable metal elements are difficult to enrich are solved.

The utility model relates to a sulfur dioxide flue gas acid liquor recovery device, which belongs to the technical field of non-ferrous metallurgy pyrometallurgy equipment, and comprises a flue gas pipeline, a half-month liquor collection box is fixedly arranged at the bottom of the flue gas pipeline, a liquor collection baffle is fixedly arranged on the inner bottom wall of the flue gas pipeline, a liquor discharge pipe is fixedly arranged at the bottom of the half-month liquor collection box, and the liquor discharge pipe is fixedly arranged on the bottom of the half-month liquor collection box. A wire mesh demister is fixedly installed on one side of the liquid collecting baffle, and a resistance reducing through hole is formed in one side of the wire mesh demister. According to the sulfur dioxide flue gas acid liquor recovery device, the liquid collection baffle is arranged in the flue gas pipeline, the half-month liquid collection box is arranged at the mounting opening in the bottom of the flue gas pipeline, the wire mesh demister is arranged on one side of the liquid collection baffle, flue gas is subjected to gas-liquid separation through the wire mesh demister, and after acid liquor in the flue gas is condensed on the liquid collection baffle, the acid liquor in the flue gas is recycled. And the flue gas freely falls into the half-month liquid collecting box and is discharged through the liquid discharging pipe, so that the acid liquid content in the flue gas is reduced.

The invention belongs to the technical field of batteries, and discloses a recovery method and application of a positive electrode material. The recycling method of the positive electrode material comprises the following steps that a waste lithium battery positive plate is pretreated, the positive electrode material is obtained, the positive electrode material comprises a positive electrode active material, conductive carbon and a binding agent, and the binding agent is an organic carbon material; and mixing the positive electrode material with a lithium salt, and calcining in a carbon dioxide atmosphere to remove the conductive carbon and the organic carbon material and supplement lithium to the positive electrode active material to obtain the positive electrode material. The method provided by the invention can effectively remove the binder and the conductive carbon, and retains good electrochemical performance of the positive electrode active material. Meanwhile, in the calcining process of the lithium salt, in-situ lithium supplementation can be carried out on the positive electrode active material, so that the electrochemical performance of the recycled positive electrode material is improved. Compared with hydrometallurgy, pyrometallurgy and other methods, the method has the advantages of being good in economical efficiency, low in energy consumption and environmentally friendly.

The application discloses a method for preparing ternary precursors by jointly treating nickel-iron water and battery black powder, which comprises the following steps: dissolving the battery black powder in dilute acid to obtain a black powder solution; after sulfuration, the nickel-iron water is slowly added into the black powder solution, and acid liquor is added for leaching; during the leaching process, the pH of the leaching end point is controlled by using the battery black powder and / or battery black powder leaching residue; after the leaching is completed, hydrolysis and impurity removal are carried out; after the nickel-cobalt-manganese ratio is adjusted, ternary nickel-cobalt-manganese precursors are obtained through hydrolysis and co-precipitation. The method combines pyrometallurgy and hydrometallurgy, extracts high-value nickel in the nickel-iron water in pyrometallurgy by hydrometallurgy, and improves the nickel grade of the system; and pyrometallurgy provides the required heat energy for hydrometallurgy, thereby reducing energy consumption.

The invention belongs to the technical field of non-ferrous metal pyrometallurgy, and particularly discloses a method for conducting antimony low-temperature reduction through biomass in-situ pyrolysis and a special smelting furnace of the method for conducting antimony low-temperature reduction through biomass in-situ pyrolysis. A reduction area and a primary refining area are arranged in the furnace body in parallel; the reduction area and the primary refining area are separated through a partition wall, and a channel for liquid metal in the reduction area to flow into the primary refining area is arranged below the partition wall; a top blowing system is arranged at the top in the furnace body; the top blowing system comprises at least one sleeve type spray gun arranged at the top of the reduction area; the sleeve type spray gun is of a concentric sleeve structure and comprises a center channel and an outer-layer annular channel surrounding the center channel. Gas fuel and combustion-supporting gas are conveyed into the furnace body through the center channel, and powdery biomass fuel is conveyed into the furnace body through the outer-layer annular channel. The method has the advantages of low-temperature antimony reduction, remarkable energy conservation, environmental protection, low carbon emission, high metal recovery rate, continuous and efficient production, long equipment service life, high safety and the like.

The invention discloses a dressing and smelting combined method for efficiently recovering tungsten and molybdenum elements from alkaline leaching and autoclaving tungsten slag. The method comprises the following steps: carrying out centrifugal reselection pretreatment on the alkaline leaching and autoclaving tungsten slag; centrifugal gravity concentration concentrate is low-grade tungsten concentrate and can be used as a raw material to be returned to an alkaline leaching and autoclaving process, and gravity concentration tailings and an additive are sufficiently mixed and then roasted; and after the roasted product is ground and screened, water leaching treatment is adopted, and a solution containing tungsten and molybdenum and leaching residues capable of being subjected to building material treatment are obtained. According to the method, the problems that when the tungsten slag is treated through a single wet process, the concentration of acid and alkali liquid is high, waste water treatment and recovery are difficult, and the process is tedious are solved, the low-grade tungsten concentrate is obtained through centrifugal separation by adopting the method of combining gravity separation and pyrometallurgy, and efficient enrichment and separation of tungsten and molybdenum can be achieved by adding a proper additive into gravity separation tailings to conduct roasting and water leaching. The method is low in comprehensive cost and high in extraction efficiency, and has a good industrial application prospect.

The invention belongs to the technical field of copper pyrometallurgy, and particularly relates to a copper pyrometallurgy temperature anomaly recognition system and method based on machine learning and platinum-rhodium thermocouples, and the system comprises a platinum-rhodium thermocouple measurement module which is used for installing the platinum-rhodium thermocouples in a smelting furnace and measuring temperature data in the smelting process in real time; the data acquisition and transmission module is used for acquiring temperature data and transmitting the temperature data to the central processing system through a wireless communication technology; the machine learning temperature anomaly identification module is used for analyzing and processing the temperature data by utilizing a machine learning algorithm, establishing a temperature anomaly identification model and identifying abnormal temperature; and the early warning and control module is used for triggering an early warning mechanism and automatically adjusting the heating power and air volume parameters of the smelting furnace when the abnormal temperature is identified. By combining the high-precision temperature measurement technology of the platinum-rhodium thermocouple and the machine learning algorithm, real-time monitoring and accurate early warning of temperature abnormity in the copper pyrometallurgy process are achieved.

The application discloses a method for oxidizing and reducing smelting of zinc sulfide concentrate and relates to the technical field of pyrometallurgy, and comprises the following steps: step one, batching; step two, granulation; step three, oxidizing smelting; step four, reducing smelting, the zinc oxide melt after oxidizing desulfurization is added into a reducing side-blown furnace, granular coal is added, the proportion of the granular coal accounts for 15%-18% of the weight of the zinc oxide melt, oxygen-enriched air is introduced for reducing smelting, water gas generated in a producer is added into the upper space of the furnace, the volume ratio of furnace gas (H2+CO) / CO2 is controlled to be 1.5-2.0; step five, fuming; step six, condensation separation; and step seven, rectification. The water gas generated in the producer is added into the upper space of the reducing side-blown furnace, the volume ratio of furnace gas (H2+CO) / CO2 is controlled to be 1.5-2.0, the oxygen-enriched air can be completely combusted and a steady-state reducing atmosphere is formed, and the zinc vapor is prevented from being oxidized.

The invention discloses a lead-zinc material redox smelting method, which relates to the technical field of thermometallurgy, and comprises the following steps: step 1, proportioning; step 2, performing granulation; step 3, oxidizing and smelting; 4, reduction smelting is conducted, specifically, the desulfurized lead-zinc oxide melt is added into a side-blown furnace, pea coal is added, the pea coal accounts for 12%-14% of the weight of the lead-zinc oxide melt, oxygen-enriched air is introduced for reduction smelting, generator water gas is added into the upper space of the furnace, and the volume ratio of furnace gas (H2 + CO) / CO2 is controlled to be 1.5-2.0; step 5, fuming; step 6, condensation separation; and step 7, rectification. Generator water gas is added into the upper space of the reduction side-blown furnace, the volume ratio of furnace gas (H2 + CO) / CO2 is controlled to be 1.5-2.0, oxygen-enriched air can be completely combusted, and the possibility that zinc steam generates zinc oxide is avoided.

The application discloses a kind of carbon thermal method high-efficiency clean production rare earth ferrosilicon alloy processes for direct current electric arc furnace, belong to rare earth pyrometallurgy field.For the problem that existing carbon thermal method process is not enough for the characteristics of direct current electric arc furnace equipment adaptation, the application proposes some systematic innovations as follows: first, rare earth concentrate physical beneficiation pre-enrichment combined with three-stage temperature control roasting;Second, "coke+charcoal+lanthanum carbon" ternary compound carbon and intelligent carbon balance control;Third, iron additive collaborative reduction to improve the conductivity of molten pool and alloy fluidity;Fourth, "coarse-medium-fine" grading and layered distribution to match the direction of direct current electric field;Five, slag and dust ash full-component resource recovery.The process of the application can reduce the comprehensive power consumption to 7500-8000 kWh / t, the rare earth yield is more than 96%, the single furnace daily output is increased by 12-18%, the dust emission concentration is less than or equal to 10 mg / m3, the solid waste comprehensive utilization rate is greater than or equal to 90%, and the high efficiency and cleanness of carbon thermal method production of rare earth ferrosilicon alloy for direct current electric arc furnace are realized.

The invention discloses a method for accurately regulating and controlling oxygen vacancy concentration in a lithium-rich layered oxide positive electrode material and application of the method. According to the method, a controllable oxygen partial pressure environment is established by utilizing a CO / CO2 mixed gas pair on the basis of a pyrometallurgy principle, and the proportion of Mn < 4 + > / Mn < 3 + > in the material and the corresponding oxygen vacancy concentration are accurately regulated and controlled through a thermodynamic equilibrium process. According to the method, the oxygen vacancy concentration can be continuously and accurately controlled in an extremely wide oxygen partial pressure range (10 <-0.7 > to 10 <-10 > atm), and foreign impurities are not introduced. Along with the increase of oxygen vacancy concentration, lattice expansion and superstructure enhancement of the material occur, so that the activity and reversibility of the anion oxidation-reduction reaction are remarkably optimized. Experiments show that the lithium-rich positive electrode material treated by the method under the optimized condition shows higher specific capacity and improved cycle stability.

The present invention lies in the field of pyrometallurgy and discloses a process and a slag suitable for the recovery of Ni and Co from Li-ion batteries or their waste, particularly from Black Mass.The slag composition is defined according to:25%<MnO<70%;Al2O3+0.5 MnO<45%SiO2>5%;Li2O>1%;MnO+Li2O+Al2O3+CaO+SiO2+FeO+MgO+P2O5>90%; and,wherein (CaO+2 Li2O+0.4 MnO) / SiO2≥2.0.This composition is particularly adapted to limit or avoid the wear or corrosion of furnaces lined with magnesia-bearing refractory bricks.

The invention belongs to the field of pyrometallurgy and discloses a method and a slag suitable for the recovery of Ni and Co from Li-ion batteries or scrap thereof. The composition of the slag is defined as follows: 10% < MnO < 40%; (CaO + 1.5 x Li2O) / Al2O3 > 0.3; CaO + 0.8 x MnO + 0.8 x Li2O < 60%; (CaO + 2 x Li2O + 0.4 x MnO) / SiO2 > 2.0; Li2O > 1%; and Al2O3 + SiO2 + CaO + Li2O + MnO + FeO + MgO > 85%. This composition is particularly suitable for limiting or avoiding the corrosion of a furnace lined with refractory bricks containing magnesium oxide.

The invention discloses a metal collaborative recovery and cascade purification method, which comprises the following steps: classifying and pretreating metals, collecting metal-containing materials from wastes, carrying out preliminary classification according to metal types, treating bulk materials into proper particle sizes through physical methods of crushing, screening and grinding, and carrying out chemical leaching and dissolving. The method comprises the following steps: carrying out chemical leaching on metal by using an acid, alkali and saline solution, dissolving target metal and forming a metal ion solution, adding a precipitator into the metal ion solution to separate out the target metal in the form of precipitate, separating the precipitate from clear liquid by virtue of a filtering and centrifuging method, and collecting metal precipitate; according to the method, the whole-process recovery and purification of the metal from waste to a high-purity product are realized through a cascade process of classification pretreatment, chemical leaching, precipitation separation, washing and drying and extraction refining, and compared with traditional pyrogenic process smelting, a high-temperature environment is not needed, and the energy consumption and the treatment cost are remarkably reduced.

Aiming at the problem of low product strength caused by large porosity in a phosphorite pellet roasting method, the invention discloses a method and a system for fluidized roasting of powdered rock phosphate, and utilizes the technical characteristics that low-grade high-calcium phosphorite pellets are easy to generate pores in the roasting process and the pores can be filled with powdered rock phosphate. Phosphorite micro-powder is added in the middle and later periods of fluidized roasting of the phosphorite pellets for mixed roasting, so that the phosphorite micro-powder is filled into pores of the phosphorite pellets and is fused and attached with the phosphorite pellets into a whole, and the compressive strength of the roasted phosphorite pellets can be remarkably improved; accurate and efficient roasting of low-grade high-calcium phosphate rock powder is met, and the requirement for subsequent pyrogenic process smelting of phosphate rock can be met. The method and the system have the advantages of simple overall process flow, low production cost, compact equipment structure, easiness in control, high production efficiency, stable product quality, high resource utilization rate, convenience in popularization and application and the like.

The utility model discloses a kind of ore group preheating equipment for pyrometallurgy zinc, including drying device, preheating device, drying device is set in the left side of preheating device, drying device, preheating device is respectively connected with production workshop control cabinet electric telecommunication.The function of the utility model is to shovel after the dry ore group from conveyor belt device, ensure the normal operation of device;It can make ore group rotate constantly while being preheated gas purging, make ore group heat evenly, prevent ore group cracking, ensure the preheating effect of ore group heat;Prevent condensation water accumulation, fall back on ore group and lead to return moisture, simultaneously, condensation water is quickly discharged, which can also prevent condensation water vaporization absorb heat in preheated gas, so as to ensure preheating effect.

A lance (4) for gas injection into a liquid (3), the lance (4) comprising: an elongate outer tube (5) with an inlet (21) to receive a gas flow (11) and an outlet (15) for directing the gas flow into the liquid; a swirler (7) for inducing a rotational swirl (18) in the gas flow; and an impulse line (10) providing fluid communication between at least one static pressure tap (16) and a sensor (12) for measuring static pressure in the gas flow at the pressure tap; wherein, the swirler (7) has a tubular hub (8) with an outer surface supporting formations to induce the rotational swirl (18) in the gas flow (11), and an inner surface defining at least part (10) of the impulse line (13) between the pressure tap (16) and the sensor (12). As the hub of the swirler provides part of the impulse line to the pressure sensor, the hub does not need to accommodate a separate, dedicated conduit for that section of the impulse line. The diameter of the hub can be reduced commensurately, thereby increasing the transverse cross section of swirler available for the gas flow into the pyrometallurgical bath. A greater cross section for the gas flow path reduces the pressure drop between the blower above the furnace and outlet of the lance in the bath, to provide an energy saving. (Figure 2A)

The invention provides a method for separating and enriching germanium in lead-zinc smelting water-quenched slag, and belongs to the technical field of lead-zinc pyrogenic process smelting water-quenched slag treatment.The method comprises the steps that germanium in the water-quenched slag is reduced and recycled through a rotary kiln, high volatilization of germanium is achieved by adding a modifier in the reducing atmosphere, and high-germanium smoke dust is obtained. The high-germanium smoke dust is subjected to I-stage leaching, more than 99% of germanium is secondarily enriched in I-stage leaching residues, efficient recovery and enrichment of germanium in water quenching residues are achieved, and during I-stage leaching, part of iron, arsenic and antimony and most of impurities such as fluorine and chlorine in the high-germanium smoke dust enter I-stage leaching liquid, so that the content of germanium in the high-germanium smoke dust is reduced, and the content of germanium in the high-germanium smoke dust is reduced. According to the method, the germanium is subjected to gradient purification and impurity removal treatment, favorable conditions are provided for follow-up recovery and enrichment of other valuable metals, efficient volatilization, enrichment and recovery of germanium are achieved, after the obtained first-stage leaching residues are subjected to second-stage leaching and third-stage leaching, lead is enriched in the third-stage leaching residues, and efficient recovery of the valuable metals in the water quenching residues is achieved.

The invention relates to the technical field of pyrometallurgy, in particular to a smelting flue gas medium-temperature heat energy efficient utilization system which comprises a supporting frame body, a waste water storage mechanism, a heat energy recovery mechanism and a solid-liquid separation mechanism. The first water guide pipeline is connected with the heat energy recovery mechanism, so that the waste water is conveyed; the heat energy recovery mechanism is arranged at the upper part of the support frame body, and is used for heating and concentrating wastewater through smelting flue gas to realize comprehensive utilization of heat energy; the solid-liquid separation mechanism is arranged at one end of the support frame body and is used for carrying out low-temperature salt separation and liquid-solid separation on the heated and concentrated smelting wastewater; and the flue gas dust removal mechanism is arranged at one end of the supporting frame body and is used for treating the smelting flue gas after heat energy recovery. Flue gas heat energy can be reasonably used for smelting plant wastewater evaporation, heat energy recovery and comprehensive utilization are achieved, and the problems that traditional wastewater treatment is high in energy consumption and flue gas heat energy is wasted are solved.

A kind of condensation and refining integrated device and method for continuous magnesium smelting belong to pyrometallurgy field.The present application precisely controls condensation temperature by setting controllable temperature condensing plate, ensures that magnesium vapor can be condensed into liquid magnesium efficiently and drop smoothly to be collected, realizes the automation control from crude magnesium collection to refining process by the synergistic work of light signal sensing device, current signal sensor and refining chamber piston push rod etc., improves production efficiency and the stability of product quality.Meanwhile, in the refining process, the present application stirs crude magnesium liquid and refining agent by high-temperature-resistant eccentric stirring paddle, so that they are fully mixed, and the refining effect is improved.When refining is carried out by the device provided by the present application, refining slag can be discharged in time, so as to avoid interference to the refining process, and the quality of refined magnesium after removing impurities is high, which meets the needs of industrial production.

The invention relates to pyrogenic extraction of metallic nickel from laterite-nickel ore, in particular to preparation of nickel-containing molten iron by smelting reduction of high-aluminum limonite type laterite-nickel ore, and belongs to the technical field of metallurgy. The method comprises the following steps: firstly, crushing raw ore of high-aluminum limonite type laterite-nickel ore and raw ore of saprolite type laterite-nickel ore, and taking 50-70% by mass of high-aluminum limonite type laterite-nickel ore, 12-24% by mass of saprolite type laterite-nickel ore, 8-12% by mass of a carbon-based reducing agent and 10-14% by mass of a flux in a batching section to form a comprehensive material; feeding the comprehensive material into a rotary kiln, uniformly mixing, removing crystal water at 350-450 DEG C, and then gradually heating to 700-850 DEG C for roasting; and hot charging the roasted product into an electric furnace, and smelting and reducing for 1-2 hours at the temperature of 1450-1550 DEG C, so as to obtain nickel-containing molten iron and slag after the reaction is completed. The method is simple in technological process, and the problem that the high-aluminum limonite type laterite-nickel ore cannot be smelted into the nickel-containing molten iron through the blast furnace can be solved.

The invention relates to the technical field of heavy nonferrous metal pyrometallurgy and process equipment, and discloses a method and device for regulating and controlling thermal stress of a furnace body of a nonferrous metal bath smelting furnace, and the method comprises the steps that a furnace shell is divided into a feeding end area, a middle high heat load area, a copper or lead discharging end area, a nickel discharging end area and other areas in the furnace length direction; dividing areas along the furnace width direction according to the axis of the top-blowing spray gun or the position of the side-blowing tuyere; establishing a radial one-dimensional or two-dimensional heat conduction equivalent model of the furnace lining, the buffer layer, the cooling wall and the furnace shell, and calculating temperature distribution at a key interface between the furnace shell and the furnace lining; establishing a calculation model of the equivalent thermal stress of each area of the furnace shell, and evaluating the equivalent thermal stress value and the safety margin of each control area; and establishing a multivariable feedback-feedforward control or model prediction control strategy, and dynamically matching the thermal load and the cooling capacity of each sub-region. According to the invention, real-time calculation and monitoring of equivalent thermal stress of key parts of the furnace shell and the furnace lining and dynamic reduction and preventive control of thermal stress of the furnace body are realized.