1870 results about "Iron ore" patented technology

The invention relates to the technical field of screening, and discloses an iron ore powder and antifreezing agent mixed screening device which comprises a rack, and the surface where the top of the rack is located is inclined; a first bearing seat is mounted on the rack, a roller with a rubber wheel surface is rotationally connected to the first bearing seat, a universal coupling is connected to the shaft end of the roller, a shaft rod is connected to the other end of the universal coupling, a speed reducer arranged on a second supporting seat is connected to the free end of the shaft rod, and the second supporting seat is connected with the rack; the speed reducer is driven by a first motor arranged on the rack, and the first motor and the speed reducer transmit power through belt transmission; a drum screen assembly used for improving the mixing uniformity of the iron ore powder and the anti-freezing agent is connected to the rolling wheel in a rolling mode, and mixed materials are discharged from screen holes of the drum screen assembly. Mixing, screening, conveying and cleaning are integrated, mixing uniformity is high, screening efficiency is excellent, operation and maintenance are convenient and fast, and the requirement for mixing and screening of iron ore powder and an anti-freezing agent is met.

The invention discloses a preparation method and application of efficient polyculture denitrification synergistic phosphorus removal filler, and belongs to the field of functional material development and sewage treatment. The method specifically comprises the following steps: step 1, uniformly mixing iron ore powder, sulfur powder and polyester high-molecular compound powder, and heating and melting; and 2, carrying out molding treatment on the molten substance, and cooling and solidifying to obtain the efficient polyculture denitrification synergistic phosphorus removal filler. According to the polyculture denitrification synergistic phosphorus removal filler disclosed by the invention, a polyester high-molecular compound is used as a supplementary electron donor of a sulfur-iron ore autotrophic denitrification synergistic phosphorus removal system, so that the nitrogen removal efficiency of denitrification is improved; the compound also can be used as an electron donor to participate in a ferrous sulfide reduction reaction, so that the discharge of sulfate in effluent is reduced, and enhanced phosphorus is removed in a form of Fe3 (PO4) 2 precipitate; meanwhile, heterotrophic denitrification generates alkalinity to make up the consumption of alkalinity in the autotrophic denitrification process, and the stability of pH in the system is maintained, so that the removal efficiency of nitrogen and phosphorus is enhanced, and secondary pollution is reduced.

The invention discloses a method for recovering iron and titanium in vanadium titano-magnetite, and relates to the technical field of vanadium titano-magnetite beneficiation. Raw ore is crushed, and then is subjected to roller milling and screening to obtain oversize and undersize products; undersize products are subjected to weak magnetic pre-selection, tailings obtained after weak magnetic pre-selection and strong magnetic pre-selection are subjected to strong magnetic pre-selection, concentrate obtained after weak magnetic pre-selection and strong magnetic pre-selection are sequentially subjected to first-stage grinding, first-stage weak magnetic separation, second-stage grinding, second-stage weak magnetic separation and second-stage weak magnetic concentration, final iron ore concentrate is obtained, the obtained tailings are combined into iron separation tailings, then the iron separation tailings are subjected to titanium separation grinding, medium magnetic iron removal and strong magnetic roughing, and iron separation tailings are obtained. And tailings obtained after strong magnetic roughing are subjected to strong magnetic scavenging, concentrates obtained after strong magnetic roughing and strong magnetic scavenging are subjected to gravity roughing and gravity concentration, and final titanium concentrates are obtained. By adopting conventional crushing, high-pressure roller grinding, magnetic separation, pre-selection and tailing discarding, the subsequent ore grinding and selecting cost can be effectively reduced, the iron and titanium grades of the ore entering the grinding process are improved, high efficiency and energy conservation are achieved, and the ore dressing efficiency is improved.

The invention belongs to the technical field of nondestructive testing, and discloses a gold ore and iron ore metal content detection method. The method comprises the following steps: acquiring an XRF energy spectrum by using an X-ray tube, acquiring an LIBS spectrum by using double-pulse Nd: YAG laser, and acquiring a Raman spectrum by using a semiconductor laser; performing baseline correction on the LIBS spectrum, performing Savitzky-Golay smoothing pretreatment on the Raman spectrum, and respectively extracting three types of spectrum characteristics; constructing a physical constraint network model, inputting XRF, LIBS and Raman features, and then outputting the correction content, fusion weight and LIBS dominant factors of Fe / Au elements; and finally, through a dynamic weight fusion strategy, combining XRF, LIBS fusion weights and network output parameters, calculating to obtain the content of the gold ore and the content of the iron ore. The technical breakthrough of multi-element cooperative detection and complex matrix interference suppression is realized, and the detection precision of Fe and Au is effectively improved.

The invention discloses a method for selectively recycling phosphorus pollutants in low-concentration phosphorus-containing sewage and preparing high-quality blue iron ore and application, and belongs to the technical field of water treatment and recycling thereof. According to the method, the low-concentration phosphorus-containing sewage is adsorbed by a phosphorus specific nano adsorption material HFO-201, and then the material is desorbed by adopting sodium hydroxide and sodium chloride with specific concentrations. The desorbed filtering material and the filtered material can be repeatedly used for adsorbing phosphorus in low-concentration sewage. After the pH value of the filtered desorption solution is adjusted to a certain concentration, FeCl2 with a certain concentration is added, and high-quality blue iron ore (Fe3 (PO4) 2.8 H2O) can be generated by keeping the pH value through sodium hydroxide under an anaerobic condition. The phosphorus product recovered by the process can be used for preparing a high-value phosphate fertilizer and a high-energy-density energy storage material, namely lithium iron phosphate (LiFePO4). The HFO-201 used in the invention can realize low-concentration phosphorus adsorption through an ammonium group combined with a D-201 matrix and loaded HFO nanoparticles. And moreover, after alkali desorption, the damage to the material is very low, and the material can be repeatedly used. And finally, the process of producing the high-quality blue iron ore through phosphorus recovery of the desorption solution is simple and easy to operate. Through XRD, ICP and other detection, it is found that the phosphorus recovery product is determined to be the blue iron ore, and the purity is very high. Through economic analysis and life cycle evaluation, it can be found that the method has remarkable economical efficiency, and the influence on the environment in the production process is small.

This hot-rolled steel sheet has a predetermined chemical composition, a microstructure includes 80% or more of tempered martensite by a volume percentage and a remainder consisting of one or more of ferrite, pearlite, bainite, fresh martensite, and residual austenite, the tempered martensite includes 5×109 pieces / mm3 or more of precipitates containing Ti and having an equivalent circle diameter of 5 nm or less per unit volume, in a surface layer region that is a range from a surface to a 1 / 10 position of a sheet thickness, a sum of an average pole density of a crystal orientation group consisting of {211}<111> to {111}<112> and a pole density in a crystal orientation of {110}<001> is 6.0 or less, and a tensile strength is 980 MPa or more.

The present invention provides a method and apparatus for predicting the temperature of molten iron in blast furnace smelting, an electronic device, and a storage medium. The method comprises: acquiring original fuel parameters, blast parameters, coal gas blowing parameters, furnace top coal gas parameters, and slag iron parameters in a blast furnace smelting process; on the basis of the original fuel parameters, the blast parameters, and the coal gas blowing parameters, determining the furnace bosh coal gas amount, the furnace bosh coal gas component, and the theoretical coal gas combustion temperature at a tuyere rotation area; determining the direct reduction degree of iron ore on the basis of the furnace top coal gas parameters, the slag iron parameters, the furnace bosh coal gas amount, and the furnace bosh coal gas component; determining a gas-liquid heat exchange coefficient on the basis of the theoretical coal gas combustion temperature, the furnace bosh coal gas component, the slag iron parameters, and the coal gas component after direct direction; and on the basis of the gas-liquid heat exchange coefficient, the direct reduction degree of iron ore, the theoretical coal gas combustion temperature, and the slag iron parameters, performing iterative solution of the molten iron temperature and the coal gas temperature, so as to complete prediction of the temperature of molten iron in the blast furnace smelting. The accuracy of molten iron temperature prediction can be improved, and a good basis is provided for blast furnace smelting control, ensuring stable and smooth operation of a blast furnace.

The invention discloses a method and a system for measuring flow and iron content of fine iron ore pulp. The method comprises the following steps of: sleeving two detection coils with the same parameters on a transportation pipeline of iron fine powder ore pulp in a front-and-back spaced manner, connecting the two detection coils into a detection module, and acquiring two similar detection signals with time delay of the two detection coils when the detection signals flow through the iron fine powder ore pulp by using the detection module; and measuring and detecting the flow and the iron content by utilizing the property that the iron concentrate pulp contains ferromagnetic substances in the two detection signals. According to the invention, the volume flow rate of the iron fine powder ore pulp in the pipeline transportation process and the content of iron elements in the ore pulp can be detected in real time, the iron fine powder ore pulp can be monitored in the transportation process, control, distribution and settlement are convenient, and the iron content of the iron fine powder ore pulp can be known in real time, so that the iron content of the iron fine powder ore pulp can be known approximately.

The invention relates to the technical field of sintering technology and environmental resources in the iron and steel industry, in particular to a method for recycling sintered waste activated carbon powder, which comprises the following steps: mixing waste activated carbon powder with a flux and iron ore concentrate to prepare small balls with different carbon contents; the method has the beneficial effects that the waste activated carbon is efficiently and fully utilized in the longitudinal sintering direction, and the purposes of reducing the consumption of sintering solid fuel, improving the sintering efficiency and improving the sintering quality are achieved. Heat required by effective mineralization of the upper portion and the edge of the sintering trolley is improved, the quality of sintered ore on the upper layer and the edge of the sintering trolley is improved, and finally the purpose of reducing production and operation cost is achieved.

The invention relates to the technical field of iron ore tailing resource utilization, in particular to a method for preparing iron oxide yellow by leaching iron ore tailings through an advanced oxidation technology, which comprises the following steps: adding a required amount of iron ore tailing powder into a persulfate solution, stirring to react, adding a reducing agent, boiling, filtering, adding alkali liquor to adjust the pH value, and filtering, thereby obtaining the iron oxide yellow. Pure liquid containing ferrous ions is obtained; taking part of the pure solution containing ferrous ions, and adding a potassium hydroxide solution to obtain an iron oxide yellow seed crystal solution; adding a pure solution containing ferrous ions into the iron oxide yellow seed crystal solution, adding an alkali solution to adjust the pH value, reacting, and separating and drying a product to obtain the iron oxide yellow. According to the method, the persulfate is adopted to leach iron from the iron ore tailings, and the iron oxide yellow is prepared from the leachate; harmless treatment of the iron ore tailings and value-added utilization of valuable resources are achieved, the raw material source of the iron oxide yellow industry is widened, and a wider prospect is provided for development of iron oxide yellow.

The invention belongs to the technical field of mine ore washing equipment, and relates to improvement of the production efficiency of an elutriation machine, in particular to an elutriation system for efficient iron ore washing and separation and a control method thereof.The elutriation system comprises a concentrate pulp mixer, an overflow groove, an elutriation barrel, a supporting platform, an ore washing water path and a control system; the concentrate pulp mixer is arranged above the elutriation barrel, the overflow groove is formed in the lower portion outside the concentrate pulp mixer and is in an inclined table shape, the tailing outlet is formed in the bottom of the inclined table, the middle of the interior of the overflow groove is connected with the elutriation barrel, a middle barrel body of the elutriation barrel is divided into an inner barrel body and an outer barrel body, and multiple sets of magnet exciting coils are arranged between the inner barrel body and the outer barrel body. The lower part of the inner cylinder is connected with an inverted-cone cylinder; a stirring impeller is arranged below the concentrate pulp mixer; the lower part of the elutriation barrel is filled with direct-flow water and rotational flow water through an ore washing water path; the system automatically recognizes working condition changes according to the ore feeding property, the material amount, field data and database set values, the optimal operation mode is selected, a magnetic field, an ore removal valve, a water supply valve and the like are controlled, efficient and intelligent separation of iron ore powder is achieved, and the optimal ore washing effect is achieved.

The invention relates to the technical field of smelting, in particular to a preparation method of direct reduction iron. The preparation method of the direct reduced iron comprises the following steps: by taking high-temperature and high-pressure hydrogen-rich synthesis gas generated by gasifying a biomass raw material as reducing gas, reducing pellets containing medium-low-grade iron ores to obtain the direct reduced iron, the high-temperature and high-pressure hydrogen-rich synthesis gas comprises H2 and CO; when the molar fraction of H2 is 50% < = XH2lt; when the content is 65% and the molar fraction of CO is 30%-45%, the reduction reaction temperature is 900-950 DEG C; when the molar fraction of H2 is 65% < = XH2lt; when the molar fraction of CO is 90% and the molar fraction of CO is 5%-30%, the reduction reaction temperature is 850-900 DEG C; when the molar fraction XH2 of H2 is greater than or equal to 90%, the reduction reaction temperature is 800-850 DEG C; the method can realize direct reduction of hydrogen groups of medium-low-grade iron ores, and is low in energy consumption and less in carbon emission.

The utility model relates to the technical field of dust treatment equipment, and discloses a dust removal equipment based on iron ore dressing processing, including: a base plate, a support column No. 1 is fixedly connected to the right side of the upper surface of the base plate; a dust removal mechanism, and the dust removal mechanism is arranged above the base plate. The utility model sets a primary treatment box, a filter screen, an air valve, an air guide pipe and a secondary treatment box. When the fan is running, the fan will extract dust-containing gas from the outside through the air inlet and allow these gases to enter the interior of the primary treatment box through the air outlet. When the dust-containing gas passes through the filter screen, the coarse dust particles in the gas will be blocked by the filter screen on the right side of the primary treatment box and fall into the dust storage box. When the gas enters the interior of the secondary treatment box through the air guide pipe, the fine dust particles in the gas will mix with water to form a suspension, which enhances the overall treatment effect of the base plate on fine particle pollutants and improves the overall dust removal effect of the base plate.

The invention discloses a slow-release phosphate fertilizer as well as a preparation method and application thereof. Iron-phosphorus compound fertilizer is prepared by generating an iron oxide coating on the surface of the phosphate fertilizer through iron mineral precipitation. Wherein the iron oxide coating can prevent the phosphate fertilizer from absorbing moisture, reduce volatilization loss of phosphorus and realize controlled release of the phosphate fertilizer, the problems of phosphate fertilizer failure and excessive phosphorus loss are solved, and in addition, the coated iron ore used for synthesizing the compound fertilizer can supplement trace element iron in soil after being dissolved, so that the nutrition of the soil is improved. The invention further provides application of the slow-release phosphate fertilizer, along with dynamic changes of soil environment humidity and oxidation-reduction conditions, ferrous oxidation mineralization and phosphorus dissolution release on the surface of the controlled-release fertilizer have high controllability, the anaerobic-aerobic environment on the surface of the compound fertilizer can be changed through flooding-drainage, and the controlled-release intelligent phosphate fertilizer is formed; the controlled-release fertilizer is driven by water, the form change of iron in different environments is taken as a switch, the application method is simple, no influence is caused to the environment, and the controlled-release fertilizer is suitable for large-scale agricultural operation.

The invention discloses a method and equipment for melting, separating and extracting iron and rare earth in rare earth iron ore. The method comprises the following steps: obtaining a molten material of rare earth iron ore and reducing agent powder at 1200-1500 DEG C; the molten material is subjected to centrifugal treatment through a centrifugal separation solidification machine, the molten material is gradually cooled and solidified in the centrifugal treatment process, four coagulum layers are formed, the four coagulum layers are cut and separated, and iron and rare earth enriched substances are obtained; and the rare earth enrichment is subjected to hydrochloric acid leaching and oxalic acid or carbonate precipitation process treatment, and then mixed rare earth precipitation is obtained. According to the method, the iron recovery rate can reach 99%, the grade of a rare earth enriched product can reach 59% or above, the rare earth recovery rate can reach 80% or above, the separation efficiency is high, the iron and rare earth recovery rates are high, the technological process is short, the method is environmentally friendly, equipment is simple, and the cost is low.

The invention belongs to the technical field of rare earth metallurgy and resource comprehensive utilization, and particularly relates to a method for separating and recycling iron and rare earth elements in rare earth iron ore. According to the method for separating and recycling the iron and the rare earth elements in the rare earth iron ore, the iron and the rare earth elements in the rare earth iron ore are recycled through MgO reduction roasting, and the efficient separation and extraction process of the iron and the rare earth elements is achieved by adding additives such as a reducing agent and MgO and through the procedures of reduction roasting, magnetic separation, selective leaching and selective precipitation. And comprehensive utilization of the rare earth-containing iron ore can be effectively realized.

The invention discloses a preparation method of a low-cost high-performance large-diameter forged grinding ball, and belongs to the technical field of grinding balls. The method comprises the following steps: taking Q235 scrap steel and waste high manganese steel ZG120Mn13 as main raw materials, adding a small amount of ferroboron, aluminum-magnesium alloy, ferrotitanium and a carburant, smelting molten steel by adopting an electric furnace, continuously casting to form a steel billet, rolling and forging the steel billet, and optimizing a heat treatment process to obtain the low-cost high-performance large-diameter forged grinding ball. The wear-resistant grinding ball has the characteristics of high strength, high hardness, high wear resistance and impact resistance, the surface hardness of the wear-resistant grinding ball can reach 61-63 HRC, the hardness distribution is uniform, the internal and external hardness difference is small, and the defects of quenching soft spots and the like are avoided. The wear-resistant grinding ball is high in tensile strength and free of out-of-round in use, is used for grinding iron ore, reduces the ball consumption per ton of ore by more than 25% compared with a common forged wear-resistant steel ball under the same working condition, has excellent wear resistance, and has good economic and social benefits in popularization and application.

The invention discloses a method for recovering phosphorus through anaerobic digestion by adding sludge-based biochar, which comprises the following steps of: firing dewatered sludge serving as a raw material under an anaerobic condition to obtain carbonized carbon; or firing under an aerobic condition to obtain pyrolytic carbon, adding any sludge-based biochar obtained by firing into the hydrothermal dewatered sludge, and carrying out anaerobic digestion on the hydrothermal dewatered sludge; the hydrothermal dewatered sludge is obtained by performing hydrothermal pretreatment on dewatered sludge; and carrying out phosphorus recovery on the sludge-based biochar subjected to anaerobic digestion by utilizing a magnetic separation method. Compared with the traditional method for recovering the phosphate fertilizer from the sludge incineration ash, the recovery method disclosed by the invention is green and pollution-free, belongs to a sludge treatment mode of treating waste with waste, realizes effective combination of a heat treatment mode and a biological treatment mode, and has a good practical application value. Moreover, the prepared sludge-based biochar has the property of magnetism, so that the recovery rate of the subsequent blue iron ore is increased, and the separation difficulty and economic investment are reduced.

The invention relates to the technical field of dressing plant control, in particular to a LightGBM-based one-key ore grinding grading control method, which comprises the following steps of: preprocessing collected iron ore grinding production data through an industrial internet of things to obtain production data, constructing a data-driven dynamic prediction model by utilizing a LightGBM algorithm, and combining time-space lag cross-correlation and flattening data input to obtain a one-key ore grinding grading control model. And deploying the trained lightweight model to a PLC control layer, and completing optimization and adjustment of corresponding key process parameters. The method has the advantages that by collecting production data in real time and utilizing the LightGBM algorithm to construct the dynamic prediction model, key variables such as the rotating speed and the ore feeding amount of the mill can be accurately and dynamically adjusted, the ore grinding process is optimized, no-load and overload operation of the mill is reduced, and compared with a traditional control method, the ore grinding efficiency is remarkably improved; operators only need to set target parameters, key parameters such as the rotating speed and the ore feeding amount of the mill are optimized in real time through the LightGBM model, it is ensured that the ore grinding fineness stably reaches the standard, and frequent intervention and adjustment are not needed.

The invention relates to the technical field of iron ore grinding and separation processes, in particular to an iron ore grinding granularity soft measurement model method based on a depth forest, which comprises the steps of collecting iron ore grinding production data and preprocessing the data, extracting input features of an iron ore grinding granularity soft measurement model of the depth forest, and setting initial parameters for a depth forest model. Comprising the number n of decision trees in each forest, the size di of a sliding window, the step length stepi and the upper limit of the number of sliding times, multi-granularity window sliding and model generation, and generation of an iron ore grinding granularity prediction result; the deep learning method based on the random forest has higher prediction precision and stronger generalization ability when processing complex ore grinding process data, can monitor the granularity change in the ore grinding process in real time, and helps operators to carry out more accurate control, so that the production efficiency and the resource utilization rate are improved, and the energy consumption and the cost are reduced.

The invention discloses an iron-based composite binder for pelletizing of iron ore difficult to pelletize and a pelletizing method of the iron ore difficult to pelletize, and belongs to the technical field of pellet production. The iron-based composite binder comprises fine-grained magnetite concentrate, bentonite, humic acid, sodium carboxymethyl cellulose, borax and the like, the iron-based composite binder is prepared into slurry, the slurry is added into pellet raw materials containing iron ore difficult to pelletize to be mixed and pelletized, obtained green pellets are subjected to heat treatment, and finished pellets are obtained. According to the method, the use amount of the binder is obviously reduced, meanwhile, the proportion of the iron ore difficult to pelletize in the pellet raw materials can be increased, green pellets and finished pellets meeting the requirements are obtained, the iron grade of the pellets is guaranteed, the production cost of iron and steel enterprises is reduced, and energy conservation and emission reduction of the iron and steel industry are facilitated.

The invention relates to the technical field of ore particle screening, and discloses high-recovery-rate micro-fine-particle magnetite ore dressing equipment which comprises a mounting frame, a protective shell is fixedly mounted on the mounting frame, a screening assembly is arranged on the protective shell, and the screening assembly comprises a three-way pipe. In order to enable the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment to be suitable for efficient separation of high-added-value micro-fine-particle iron ore, the screening assembly is arranged, the screening assembly is matched with a power motor to drive a large belt wheel through a small belt wheel and a transmission belt, an output shaft drives an auger rod to push ore in a three-way pipe, feeding blockage is avoided, and the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment is suitable for efficient separation of high-added-value micro-fine-particle iron ore. And meanwhile, a centrifugal motor drives a trilateral frame to drive a centrifugal screen drum to rotate at a high speed, fine particles fall into a discharging hopper through screen holes by utilizing centrifugal force, and coarse particles are discharged from a first discharging pipe through a mounting drum. And the stirring paddle rotates synchronously to prevent the fine particles from accumulating in the funnel.

The invention provides an intelligent control algorithm for dust removal of a steel ore tank and an operation effect monitoring method thereof, and aims to improve the energy efficiency and emission control capability of a dust removal system of the steel ore tank. The system comprises a data acquisition module, a hierarchical control module and a multi-objective optimization module. The data acquisition module is used for acquiring dust concentration, fan rotating speed, energy consumption and equipment state signals in real time; the hierarchical control module adopts the combination of model predictive control (MPC) and fuzzy PID control to accurately adjust the rotating speed of a fan, the ash removal period and the opening degree of an air door; and the multi-objective optimization module dynamically adjusts the dust-energy consumption weight ratio according to the electricity price time period, and optimizes the balance between energy consumption and emission. The invention further comprises an operation effect monitoring method, the operation effect of the system is monitored in real time, the energy-saving effect is evaluated and optimization suggestions are provided by means of data comparison and analysis, comprehensive evaluation of the energy-saving rate and the performance, visualization of a monitoring report and the like. And green transformation and low-carbon emission targets of a dust removal system of the steel and iron ore tank can be realized.

The invention discloses biomass charcoal prepared through pyrolysis-water quenching and a method for preparing iron ore pellets through the biomass charcoal, and belongs to the technical field of iron ore pellet production. Biomass raw materials are pyrolyzed, pyrolytic carbon generated through pyrolysis is rapidly subjected to water quenching at the pyrolysis temperature, then filtering separation, drying and grinding are carried out, and the biomass charcoal is obtained and has the advantages of being low in ash content, low in K and Cl content, high in heat value, low in volatile component content, good in combustion performance and the like, meets the requirement for internal matching of pellets and has the advantages of being environmentally friendly and free of pollution. The coal-based fossil fuel can completely or partially replace fossil fuel for use, and the dependence on the coal-based fossil fuel and the emission of CO2 and pollutants in the iron ore pellet production process are reduced on the premise that normal production of the iron ore pellets is not affected.

The invention discloses a beneficiation method of refractory iron ore with symbiotic hematite, limonite and siderite, which comprises the following steps of: crushing weakly magnetic refractory iron ore to below 100mm in a closed circuit, then sequentially carrying out three times of dry screening to obtain four particle fractions of 0-6mm, 6-15mm, 15-40mm and 40-100mm, pre-selecting the particle fractions of 6-15mm by adopting a dry high-intensity magnetic separator, pre-selecting the particle fractions of 15-40mm by adopting a chunk jigger, pre-selecting the particle fractions of 40-100mm by adopting a photoelectric intelligent separator, and pre-selecting the particle fractions of 40-100mm by adopting a high-intensity magnetic separator; photoelectric intelligent pre-selected concentrate is crushed to 0-40 mm through a fine crushing closed circuit, then jigging pre-selected concentrate is combined, then the photoelectric intelligent pre-selected concentrate is crushed to 0-6 mm through an ultra-fine crushing closed circuit, an ultra-fine crushing product is combined with the 0-6 mm fraction, then wet type strong magnetic pre-selection is conducted through a coarse grain wet type strong magnetic separator, the pre-selected concentrate is subjected to ore grinding-fine grain wet type strong magnetic one-coarse one-scavenging one-coarse one-scavenging one-fine one-scavenging reverse flotation, and the final concentrate is obtained. And final concentrate is obtained. The invention has the advantages of large raw ore selection granularity, large tailing discarding amount, low energy consumption, good separation effect and the like.

The invention belongs to the technical field of dangerous solid waste resource recovery in the nonferrous smelting industry, and discloses a method for recovering arsenic trioxide by leaching arsenic sulfide slag from ferrihydrite. The arsenic sulfide slag is leached by ferrihydrite in an acid solution under the normal pressure condition, so that the leaching rate of arsenic in the arsenic sulfide slag is increased; and sulfur dioxide gas is introduced into the leachate to reduce arsenic in the solution, finally arsenic trioxide is obtained through evaporation concentration and cooling crystallization, meanwhile, oxygen is introduced into the crystallized liquid to oxidize and recycle iron, and cyclic utilization of resources is achieved. The method has the characteristics of simplicity and convenience in operation, low cost, safety, reliability and the like, the arsenic sulfide slag can be effectively recycled to prepare the arsenic trioxide product, and the purpose of treating waste with waste is achieved.

The invention provides an opencast iron ore traffic flow planning and scheduling optimization method, and relates to the technical field of opencast iron ore production operation. The method comprises the following steps of: firstly, pre-estimating the quantity of dispatched trucks according to a daily planned ore blending production proportion given by an ore dressing process department, and establishing a multi-target optimization model taking the minimum total transportation cost, the maximum ore transportation volume, the minimum rock transportation volume and the minimum total idle time as targets; providing an improved MOPSO algorithm with an adaptive weight strategy, a congestion degree sorting strategy, a local search mechanism and a constraint processing mechanism, and solving a traffic flow planning and scheduling model; and correcting daily plan actual yield and grade according to an optimization result, and providing a reference basis for scheduling operation decision. According to the method, multiple targets and complex constraints in the opencast iron ore traffic flow planning and scheduling problem can be effectively processed, and the solving efficiency and the scheduling quality are improved; the method is helpful for a dispatcher to evaluate the feasibility and effect of the dispatching scheme before actual execution, and improves the production efficiency and saves the production cost on the premise of meeting the production yield and grade requirements.

The invention belongs to the technical field of mineral product detection, and particularly relates to an iron ore iron element content detection method which is used for iron ore detection and comprises the steps that 1, an unmanned aerial vehicle is used for carrying out detection path planning, and communication is carried out in cooperation with Internet of Things data in a region so as to reach a designated cargo position; step 2, acquiring spectral data and performing data processing; 3, performing spectral line identification and classification by using a machine learning model; and 4, improving the learning model, on one hand, improving the efficiency and reducing the time consumed by manpower, and on the other hand, learning through the machine model, and improving the accuracy and efficiency of ore detection, so that the requirements of commodity transactions are better met, and the efficiency of production activities is improved.

The invention discloses a system and a method for producing sponge iron by coupling a gasification furnace and a gas-based shaft furnace. The system comprises a coal pretreatment device for pretreating received raw material coal; the gasification furnace receives the raw material coal treated by the coal pretreatment device through a conveying device, and synthesis gas is obtained through reaction; the mixer receives furnace top gas generated by the gas-based shaft furnace, mixes the furnace top gas with synthesis gas to obtain mixed gas, and outputs the mixed gas to the dust remover; the high-temperature desulfurization device is used for carrying out desulfurization treatment on the dedusted mixed gas by using a high-temperature desulfurization agent, and the high-temperature decarbonization device is used for carrying out decarbonization treatment on the desulfurized mixed gas and outputting the decarbonized mixed gas to the gas-based shaft furnace; iron ore and / or oxidized pellets are / is arranged in the gas-based shaft furnace, the decarbonized mixed gas is received, and sponge iron is generated through reaction. According to the method, the synthesis gas is cooled by using the furnace top gas, additional cooling equipment is not needed, the cost is reduced, the energy utilization rate is increased, and cleaner and more efficient sponge iron production is realized.

The invention provides a method for preparing high-purity titanium from ferrotitanium complex ore, and relates to the technical field of nonferrous metallurgy. The method comprises the following preparation steps: calculating and adding a carbonaceous reducing agent according to the components of the ferrotitanium complex ore and a specific principle, mixing and pelletizing, and reducing to generate a Fe (alloy)-TiC-MOx mixture; according to the content of TiC and Fe in the mixture, adding metal iron powder and Fe2O3 or iron ore concentrate according to a certain stoichiometric ratio, mixing, pelletizing, and reducing to obtain a titanium-iron alloy; and the obtained ferrotitanium alloy serves as a soluble anode, and high-purity titanium is prepared through electrolysis in halide molten salt containing low-valence titanium salt. According to the method, the reaction characteristic of iron and iron oxide with TiC at high temperature is utilized, the ferrotitanium alloy is generated from the ferrotitanium complex ore to serve as the soluble anode, then the high-purity titanium is prepared through molten salt electrolysis, the adverse effects of component deviation and anode precipitates existing in the soluble anode containing the titanium compound are avoided, and meanwhile casting forming is easy, and the method is more suitable for industrialization.