575 results about "Iron ore" patented technology

The invention discloses a method for recovering iron in tailings of copper separation from copper smelting slag through combination of microwave-assisted oxidizing roasting and magnetic separation, and belongs to the technical field of metallurgical solid waste resource utilization. The method comprises the steps that high-temperature copper smelting slag is subjected to water quenching, crushing and ore grinding, flotation and copper removal to obtain tailings containing silicon iron, after a calcium-based additive is added for ball milling and mixing, microwave oxidizing roasting is conducted under the oxygen-enriched condition, roasting products are subjected to high-gradient magnetic separation after crushing and ore grinding, and iron ore concentrate and magnetic separation tailings are obtained. According to the method, the strong wave-absorbing characteristic of fayalite is utilized, the roasting temperature and energy consumption are reduced through microwave heating, iron-silicon separation is achieved through a calcium-based additive, and iron is recycled through magnetic separation in one step. The final magnetic separation iron recovery rate reaches 85% or above, the iron ore concentrate grade exceeds 60%, magnetic separation tailings can be used as building materials, the process is simple, the cost is low, environment friendliness is achieved, the defects of a traditional process are overcome, and high-value utilization of solid waste is achieved.

The invention discloses a sulfur-containing magnetite beneficiation method which specifically comprises the following steps: S1, raw material preparation: crushing sulfur-containing magnetite to obtain small-particle sulfur-containing magnetite; s2, physicochemical property determination: detecting the particle size of the small-particle sulfur-containing magnetite, the content of magnetite in the small-particle sulfur-containing magnetite and the content of sulfur minerals in the small-particle sulfur-containing magnetite; s3, magnetic separation: according to the physicochemical properties of the small-particle sulfur-containing magnetite detected in the step S2, automatically controlling the magnetic field intensity of a magnetic separation process through a controller, and carrying out magnetic separation to obtain magnetite and sulfur-containing ore; the magnetic field intensity of the magnetic separation process is dynamically adjusted according to the iron ore particle size of the sulfur-containing magnetite, the magnetite content in the sulfur-containing magnetite and the sulfur mineral content, the trends of iron minerals and sulfur minerals are accurately controlled, optimal adjustment of the element trends is achieved, and the recovery rate of iron and sulfur is increased.

The utility model relates to the technical field of dry grinding and dry separation of iron ore and similar processes, and particularly discloses a dry grinding and dry separation system which comprises an incoming material conveying system, a roller mill, a dynamic powder concentrator, a dry classification cabin and a fine powder collecting and conveying system. A discharging hole of the supplied material conveying system is communicated with a feeding hole of the roller mill; a discharging hole of the roller mill is communicated with a feeding hole of the dynamic powder concentrator; a coarse particle material outlet of the dynamic powder concentrator is communicated with a material inlet of the dry type grading cabin; an oversize coarse particle discharging opening of the dry type grading cabin is communicated with a feeding opening of the roller mill; and a fine powder discharge hole of the dynamic powder concentrator is communicated with the fine powder collecting and conveying system. Finished product materials with various particle sizes can be provided, and the requirements of customers for different finished product particle sizes are met; fine powder screened by the dynamic powder concentrator is collected by a dust collector and then is directly conveyed to a tailing discarding procedure, so that the handling capacity of the dry classification cabin is reduced; the use condition of the dry-type grading cabin is optimized, and the system flow is simplified.

A production method of pig iron using a blast furnace with a tuyere includes: charging a first layer containing an iron ore material and a second layer containing coke alternately in the blast furnace; and reducing and melting the iron ore material in the charged first layer while injecting an auxiliary reductant into the blast furnace by hot air blown from the tuyere, in which: an aggregate for letting through the hot air to a central portion of the blast furnace is blended into the first layer; and the aggregate contains a reduced iron molded product obtained through compression molding of reduced iron.

The invention relates to the technical field of sampling equipment, in particular to a sampling device for iron ore detection, which comprises a plurality of symmetrically arranged stand columns, every two of the plurality of stand columns form a group, the tops of the two stand columns in the same group are jointly and fixedly connected with I-shaped steel rails, the tops of the two I-shaped steel rails are jointly provided with a transverse moving mechanism, and the transverse moving mechanism is provided with a lifting mechanism. The lifting mechanism and the sampling mechanism are used in cooperation, iron ore powder is conveyed into the sampling barrel through rotary lifting of a plurality of screw rods, multi-point synchronous sampling and sampling inspection of the iron ore powder are achieved, compared with single-point sampling, the working efficiency is high, after multi-point sampling, the sampling efficiency is high, and the sampling efficiency is high. The sampling mechanism is drawn out of iron ore powder, a plurality of sampled samples enter the stirring box from the material leakage opening along with continuous rotation of the driving gear, under the action of the premixing assembly, primary premixing of the samples is achieved, and the pressure of the follow-up mixing step is reduced.

The utility model belongs to ironmaking technical field especially is a kind of ironmaking impurity removal mechanism, including shell body, shell body one side inner wall is equipped with mounting plate, and the inside installation of shell body is equipped with connecting plate, connecting plate one side is provided with several guide plates, the bottom of guide plate is all provided with electromagnet, mounting plate one side is equipped with several electric telescopic handle, electromagnet one side both ends are connected with corresponding electric telescopic handle output end through support, connecting plate one side is equipped with blowpipe, and the one side of blowpipe is provided with several branch pipes;It can be more thoroughly cleaned to all non-raw material impurities in iron ore raw material, so that impurities and iron ore raw material are discharged from different discharge ports respectively, a large amount of dust on the surface of iron ore is cleaned during impurity removal process, iron ore raw material and impurities are more accurately distinguished, ore similar in appearance with iron ore raw material can be picked out, and the impurity removal effect is better.

The application discloses a method for reducing energy consumption by optimizing production of a natural power factor and secondary voltage of a ferrosilicon electric arc furnace, and belongs to the technical field of ferrosilicon smelting. The method solves the problems of low power factor, blind secondary voltage regulation, high power consumption and poor furnace stability in the traditional process. The method comprises three-stage operation methods. The first stage is a voltage lifting and furnace condition adapting stage, the second stage is a voltage stabilizing and parameter coordinating optimizing stage, and the third stage is a parameter solidifying and efficiency enhancing stage. The method takes the improvement of the operating resistance of the electric arc furnace as the core, controls the whole process in stages, constructs a benign smelting cycle of "high voltage-low current-high power factor", realizes the synchronous optimization of the natural power factor and the secondary voltage, and greatly improves the economy and production stability of the ferrosilicon smelting.

The invention discloses a method for precipitating iron through ultrasonic enhanced oxidation, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: performing ultrasonic treatment on a mixed system of an iron-containing zinc sulfate solution and an oxidizing agent under an acidic condition, efficiently catalyzing ferrous ions (Fe < 2 + >) to be oxidized into ferric ions (Fe < 3 + >) by utilizing an ultrasonic cavitation effect, and promoting the ferric ions to be stably precipitated in a goethite (alpha-FeOOH) form; after the reaction is completed, carrying out solid-liquid separation to obtain a low-iron zinc sulfate solution and goethite slag; compared with a traditional jarosite method and a hematite method, the method has the advantages that exogenous cations such as potassium and sodium do not need to be introduced, a high-temperature and high-pressure environment is not needed, and the oxidation efficiency can be remarkably improved and the goethite crystal form conversion can be regulated and controlled only based on the ultrasonic cavitation effect, so that the consumption of an oxidizing agent and the zinc content in the slag are effectively reduced; meanwhile, the iron grade and the filtering performance of an iron precipitation product are improved; the method is suitable for various oxidants, is high in process adaptability, has the advantages of high efficiency, greenness and economy, and has wide popularization and application prospects in the field of zinc smelting.

The application provides a method for efficiently and selectively removing iron and chromium from cobalt-nickel hydroxide raw materials, which can realize the synchronous and deep removal of iron and chromium impurities for high-iron and high-cobalt nickel hydroxide raw materials through the synergistic process of acid leaching, reduction pH adjustment, oxidation precipitation and solid-liquid separation, and the concentrations of iron and chromium in the purified nickel-cobalt liquid are both controlled below 10 mg / L, and the impurity removal precision meets the subsequent high-purity production requirements; the chromium-goethite co-precipitation crystal product is generated in situ in the reaction, and has excellent settling and filtering performance, solving the problems of difficult colloid precipitation and filtration and easy equipment blockage in the traditional method, and the process route is short and the reaction conditions are mild, which can effectively reduce the adsorption entrainment and co-precipitation loss of nickel and cobalt valuable metals, and while realizing the efficient and deep purification of iron and chromium, the excellent solid-liquid separation performance and high main metal recovery rate are also considered, and the method is suitable for the industrial purification treatment of high-iron and high-chromium complex cobalt-nickel raw materials.

A microwave process and apparatus for processing ore, including a supply of reaction gases from Unipolar electrolysis, which provides an efficient and economical source of reaction gases The process and apparatus includes a reaction gas microwave pre-heat zone to pre-heat the reaction gases to a first temperature prior to input into a main reactor body where the temperature is raised to a higher second temperature to melt the ore and process it into desirable products, such as green steel in an energy efficient manner with reduced emissions.

The utility model provides an automatic iron powder ore conveying and discharging device which comprises a base, a conveying slide way arranged on the base, a dustproof assembly arranged on the conveying slide way and an anti-blocking assembly arranged on the conveying slide way, the conveying slide way is obliquely arranged relative to a datum plane and used for conveying iron powder ore to a target discharging station, and the anti-blocking assembly is arranged on the conveying slide way. The dustproof assembly is used for limiting movement of dust in the conveying slide way, and the anti-blocking assembly is used for impacting the conveying slide way so as to prevent iron powder ore from being accumulated on the conveying slide way. The dustproof assembly and the anti-blocking assembly are arranged on the conveying slide way, the dustproof assembly can effectively limit dust overflow, the working environment is improved, and environmental pollution is reduced; the anti-blocking assembly collides with the conveying sliding way regularly, iron powder ore accumulation is avoided, it is ensured that materials are conveyed smoothly, and the discharging efficiency and the equipment reliability are improved. The device has the advantages of high conveying efficiency, effective reduction of manpower transportation cost, low maintenance cost, reasonable structural design, simplicity and convenience in operation and convenience in popularization and implementation.

The invention belongs to the technical field of metallurgical ironmaking, and discloses a high-silicon iron ore pellet as well as a preparation method and application thereof. The preparation method of the high-silicon iron ore pellets comprises the following steps that S1, high-silicon iron ore, a binder and ferrous nitrate are mixed, hydrogen peroxide is added for pelletizing, and green pellets are obtained; and S2, the green pellets are dried, preheated and roasted, and the high-silicon iron ore pellets are obtained. The preparation method of the high-silicon iron ore pellets is high in process compatibility, the consolidation kinetics of the high-silicon iron ore under the low-temperature condition can be effectively enhanced according to the characteristics of the high-silicon iron ore, and the mechanical strength and metallurgical performance of the pellets are remarkably improved on the premise of not depending on high-temperature or long-time roasting; environment protection and efficient utilization of resources are considered, green low-carbon production of high-quality pellets is achieved, and the method is simple in process, controllable in cost and high in adaptability, has large-scale industrial popularization potential and is expected to promote transformation of the iron and steel industry to the green low-carbon direction.

This invention discloses a method for determining the arsenic content in ores, belonging to the field of ore element detection technology, comprising the following steps: (1) weighing the ore sample, adding hydrochloric acid-nitric acid mixed acid for acid hydrolysis, then adding hydrofluoric acid and perchloric acid for auxiliary digestion, evaporating to near dryness, and dissolving the residue with hydrochloric acid; (2) adding a thiourea-ascorbic acid-citric acid mixed reducing masking agent to reduce and mask interfering ions; (3) using an atomic fluorescence spectrometer to determine the fluorescence intensity of arsenic in the sample solution, and calculating the arsenic content according to the standard curve. This method achieves accurate and stable determination of arsenic in various ores such as phosphate rock and iron ore by optimizing sample pretreatment conditions, improving the reduction system and matrix interference suppression strategy.

Provided is a reduced iron production method that can suppress clustering of iron ore pellets. A reduced iron production method according to the present invention is characterized by comprising: a pellet production step for mixing an iron ore powder, a binder, and an auxiliary material, granulating the mixture to obtain green pellets, and baking the green pellets to obtain iron ore pellets; and a reduction step for charging the iron ore pellets in a vertical shaft furnace, and directly reducing the same by using a reducing gas to obtain reduced iron pellets. The reduced iron production method is characterized in that: raw materials of the iron ore powder include an iron ore having a compositional makeup in which the total Fe amount is 63 mass% or less and the sum of SiO2 and Al2O3 is 4 mass% or more; and the reduced iron pellets satisfy the following formula. (SiO2+Al2O3+CaO+MgO+FeO) / M.Fe ≥ 0.15

The utility model discloses an iron ore screening device which comprises a screening box, a feeding hopper is fixedly arranged at the top of the screening box, a first screen and a second screen are arranged in the screening box, a motor is installed below the right side of the screening box, and the iron ore screening device further comprises a collecting box connected with the left side of the screening box through bolts. And rotating rods are connected to the positions, located below the first screen and the second screen, in the screening box through bearings, the outer side of the left side of the lower rotating rod is sleeved with a sleeve, and a rotating disc is fixed to the left end of the sleeve. According to the iron ore screening device, a motor drives a rotating rod to rotate reversely, the rotating rod drives a sleeve to rotate through a ratchet wheel assembly, meanwhile, a rotating disc rotates and pulls a rack to move downwards through a connecting plate, then a driven gear rotates and winds a traction rope, and a cleaning brush can be pulled to move; and the surfaces of the first screen mesh and the second screen mesh are cleaned, so that the situation that subsequent screening work is affected due to blockage of screen holes is avoided.

The invention provides a catalytic material based on magnetic iron ore and a preparation method and application thereof, the magnetic iron ore is used as an active site center, Portland cement is used as a carrier, water is used as a solvent, and the mass ratio of the magnetic iron ore to silicate is (1-2): (8-9). Magnetic iron ore becomes an ideal active site center of a catalytic material due to good magnetism, catalytic activity and low toxicity. The Portland cement is low in price, easy to obtain and high in stability and is often used as an adhesive or a carrier of various catalysts, the magnetic iron ore and the Portland cement are combined, the adsorption capacity on the sulfur hexafluoride gas can be improved, and then the removal efficiency of the sulfur hexafluoride gas is improved.

The invention provides a preparation method of goethite-boron complex minerals for soil improvement, and belongs to the technical field of preparation of artificial minerals for soil improvement, the preparation method comprises the following steps: 1, mixing solutions; 2, stirring the mixed solution; 3, dropwise adding a sodium hydroxide solution; step 4, centrifugal washing; 5, drying the precipitate; and 6, grinding and screening. According to the goethite-boron composite artificial mineral prepared through the method, the boron loss rate is reduced, the boron slow release performance is improved, the ecological environment effect is improved, the boron fertilizer utilization efficiency is improved, iron nutrition is synchronously provided, and the iron deficiency symptom of calcareous soil is relieved.

The application discloses a kind of iron ore mining underground pollution gas reciprocating self-cleaning detection device, it is related to pollution gas detection technical field, it includes detection shell, detection shell both ends are equipped with filter screen, and the inside sliding installation movable plate separates it into two independent cavities;Movable plate is fixed with cavity plate, cavity plate is equipped with gas detection head, and gas head is respectively inserted into two cavities with control valve on the both sides of cavity plate;The driving assembly in detection shell drives movable plate reciprocating motion.This device realizes unilateral suction detection, unilateral exhaust self-cleaning alternate work by movable plate reciprocating motion, solves the problem that filter screen of traditional device is easy to block, guarantees detection precision, without manual frequent cleaning, adapt to underground harsh environment, improve detection reliability and operation safety.

The invention discloses a preparation method of an iron ore concentrate powder scanning electron microscope sample, and belongs to the field of material analysis and testing. The preparation method comprises the following steps: (1) adding iron ore concentrate powder to be detected into absolute ethyl alcohol, and fully and uniformly shaking to obtain a sample solution; (2) adding a dispersing agent into the sample solution, and uniformly oscillating by using an ultrasonic method to obtain a solution after ultrasonic oscillation; and (3) pouring the solution subjected to ultrasonic oscillation into a sprayer, uniformly spraying the solution to the surface of a conductive adhesive tape fixed on an objective table of a scanning electron microscope through the sprayer, and naturally drying to obtain the iron ore concentrate powder scanning electron microscope sample. The method is simple in sample preparation process, uniform in iron ore concentrate particle dispersion and easy to operate, the problem of iron ore concentrate powder agglomeration is solved, meanwhile, a scanning electron microscope sample chamber is not polluted, and the observation result is real and reliable.

The invention relates to the technical field of iron and steel production intelligent scheduling, in particular to an ore blending molten iron stable output time sequence prediction system and method based on LSTM, and aims to solve the problems that in existing high-quality steel special ore blending production, molten iron stable output time is not matched with a steel production plan, high-quality molten iron is wasted, and the production cost is high. According to the system, an end-to-end LSTM deep learning prediction model is constructed, ore blending, blast furnace conditions and molten iron production multi-source time sequence data are fused, and a molten iron stable standard reaching time window is accurately output; molten iron supply simulation, consumption monitoring and time window dynamic calibration are realized by combining a real-time data interface and a visual interaction interface; and a closed-loop simulation verification module is matched to simulate the molten iron supply and demand matching degree under different production scheduling schemes, so that prediction-monitoring-optimization-verification integrated decision support is provided for planning personnel, and finally, fine allocation of high-quality molten iron resources is realized, the production cost is reduced, and the hit rate of steel production is increased.

A pellet production method that can suppress bursting of green pellets can be provided. The method for producing an iron ore pellet includes grinding iron ore with iron content of 63 mass % or less to obtain ore powder, in which a volatile matter of the iron ore is 3.3 mass % or more, the ore powder has a cumulative 90% diameter of 150 μm or less in a volume-based particle size distribution and a particle size distribution index based on the harmonic mean diameter of 14,700 or more and 510,000 or less.

The invention relates to the technical field of beneficiation, and particularly provides a beneficiation process for tungsten-molybdenum ore with calcium and magnesium ions easy to separate out. According to the beneficiation process disclosed by the invention, the iron ore concentrate, the molybdenum sulfide concentrate and the tungsten molybdenum oxide concentrate can be comprehensively obtained by improving the magnetic separation process, the flotation reagent combination, the desliming, the ore washing and other operation procedures; the problem of loss of tungsten and molybdenum metal along with magnetic concentrate due to the existence of a large amount of magnetite-molybdenite and magnetite-tungsten-molybdenum oxide ore intergrowth of the ore is effectively solved, and the problem of low molybdenum sulfide flotation index due to mismatching of a sulfuration flotation process is solved; the core problem that a large number of calcium and magnesium ions are separated out and react with a fatty acid collecting agent to cause heating flotation failure is solved, the technical bottleneck troubling the type of mine for more than ten years is successfully overcome, and the tungsten and molybdenum resource comprehensive recovery competitiveness of related enterprises can be remarkably improved.

This invention discloses a beneficiation method for iron, boron, and uranium minerals in uranium-boron iron ore, which has the following characteristics: 1. The three-stage closed-circuit crushing product is laminated and pulverized using a high-pressure roller mill, so that the -5mm particle size content in the crushed product is greater than 70%. By utilizing the technology of multiple crushing and less grinding, the energy consumption of beneficiation can be reduced and the grinding efficiency can be improved; 2. Iron concentrate is obtained by staged grinding and staged magnetic separation. The tailings of iron beneficiation, such as the tailings of coarse magnetic separation, primary magnetic separation, and secondary magnetic separation, are subjected to stepwise gravity separation to obtain uranium concentrate and boron concentrate in stages, thereby improving the recovery rate of B2O3 and U in the boron and uranium concentrates and comprehensively utilizing iron, boron, and uranium resources; 3. The uranium minerals in the iron beneficiation tailings are separated by a combination of Nelson centrifugal concentrator, shaking table, and suspended cone concentrator, thereby improving the U recovery rate in the uranium concentrate. The Nelson centrifugal concentrator can be used for roughing of uranium minerals, the suspended cone concentrator can recover fine-grained uranium minerals, and the shaking table can recover relatively coarse-grained uranium minerals.

The operation method of a blast furnace improves the ventilation of the lower part of the blast furnace by tuyere injection of fine ore. The operation method of the blast furnace (1) of the invention is characterized in that coal is pulverized as fine coal, and an iron ore having a pulverized ignition loss of 9 mass% or more and 12 mass% or less is pulverized as fine ore, the injection rate of the fine coal is 150 kg / tp or more, the injection rate of the fine ore is 2.5 kg / tp or more and 50.0 kg / tp or less, and the fine coal and the fine ore are injected from the tuyere (2). It is preferable that the iron ore and the coal are pulverized together.

A continuous process for electrolytically producing solid particles of an iron-bearing product from iron ore particles is disclosed. The process is performed in an electrochemical flow reactor provided with an electrochemical cell comprising a cathodic compartment and an anodic compartment separated by a separator, wherein the cathodic compartment houses a cathode and the anodic compartment houses an anode at least partially in contact with an anolyte. A catholyte comprising iron ore particles having a particle size P80 greater than 20 µm suspended in an alkaline electrolyte is circulated through the cathodic compartment and an electrical potentiel greater than 1.4V is applied between the cathode and the anode in the electrochemical cell and electrolytically reduce the iron ore particles to solid particles of the iron-bearing product suspended in the alkaline electrolyte (spent catholyte). The spent catholyte is then circulated to a séparation means whereby the iron-bearing product particles are separated from the spent catholyte resulting in a depleted catholyte. Iron ore particles may then be introduced into the depleted catholyte and the resulting replenished catholyte is recirculated to the cathodic chamber.

This invention belongs to the field of magnetic separation technology, and in particular to a device for the coordinated mineralization and magnetic separation of iron in red mud. The lower inner side of the sand mill shell is provided with an arc-shaped concave cavity adapted to a cylindrical grinding rotor. The cylindrical grinding rotor is set in the arc-shaped concave cavity by rotation. Its outer cylindrical surface and the inner wall of the sand mill shell form a non-equidistant grinding chamber with left and right symmetry and a larger upper and smaller lower spacing. The minimum gap between the chambers is located in the bottom area of ​​the arc-shaped concave cavity. An overflow port is opened on the side wall of the sand mill shell in the downstream direction of the slurry flow path. A belt-type iron separator is used to magnetically separate the slurry discharged from the overflow port to remove iron. The slurry after magnetic separation is returned to the inside of the sand mill shell for circulation and re-grinding. The mixture after one grinding is subjected to preliminary magnetic separation to remove iron ore that can be magnetically adsorbed. Then the remaining mixture is circulated again. By diverting the iron-containing particles during the circulation process, it is ground to the target 1μm faster.

In order to reduce the cost of a hydrogen metallurgy technology and promote the large-scale process of hydrogen metallurgy, the invention provides a method for reducing sponge iron from iron ore concentrate powder green pellets. The method comprises the following steps: (1) preparing iron ore powder into green pellets by using an adhesive; and (2) the green pellets are placed in a breathable container, and iron ore in the green pellets is reduced into a sponge iron product through reducing gas in a roasting furnace. According to the method, the sintering process of iron ore concentrate powder green pellets is replaced by the reduction process to directly obtain the sponge iron, and the used reducing gas is H2 or NH3 or NH3 + H2. The iron ore powder is made into green pellets through the adhesive, and the permeability between the green pellets and between iron ore particles in the green pellets during the initial reaction is improved; fe grains generated by reducing the iron ore through the reducing gas are utilized, crystal bridge connection is formed between adjacent grains, and permeability between pellets and permeability between iron ore grains in the pellets in the reaction process are guaranteed; and under the condition of 800-1100 DEG C, the metallization ratio of the iron ore concentrate powder is as high as 100%.

The utility model relates to the technical field of iron ore separation and screening, in particular to an iron ore separation and screening device, which is provided with a rotating mechanism and a filtering mechanism, so that materials can rotate in multiple directions in the iron ore separation and screening process, the blockage of the materials is reduced, and the filtering efficiency is improved. Comprising a feeding mechanism; the device further comprises a flushing mechanism, a discharging mechanism, a rotating mechanism and two filtering mechanisms, the flushing mechanism is installed at the lower end of the feeding mechanism, the discharging mechanism is installed on the flushing mechanism, the rotating mechanism is installed in the feeding mechanism, and the two filtering mechanisms are installed on the rotating mechanism; the feeding mechanism is used for feeding, the flushing mechanism is used for flushing, the discharging mechanism is used for discharging, the rotating mechanism is used for rotating, and the filtering mechanism is used for filtering.

This invention relates to a rapid iron ore grade identification method based on image processing for on-site application during mining. The method comprises the following steps: 1) acquiring digital images of iron ore samples of different grades from the mining area and establishing an iron ore grade identification model using a deep learning algorithm; 2) using this identification model to rapidly identify the iron ore grade within the boreholes of each blasting unit block, then estimating the iron ore grade of each unit block using the inverse power of distance method based on this grade, and finally calculating the iron ore grade of the entire blasting area using the inverse power of distance method for each unit block. The advantages of this invention are: it overcomes the shortcomings of complex procedures, large computational load, and long time consumption in determining iron ore grade in mining areas; the identification time for a single image is only 0.3 seconds. Compared with laboratory test values, the identification accuracy can reach 90%, achieving rapid on-site identification and estimation of iron ore grade, laying the foundation for building intelligent mines.

The utility model provides a crusher with an ore screening function, which relates to the technical field of ore crushing and comprises a crusher body, and a dust collection box is fixedly mounted at the bottom in the crusher body; the iron removal assembly is arranged in the pulverizer body and comprises a conveying belt, a magnet, a fixing plate and a scraping plate; and the dust removal assembly is arranged in the dust collection box and comprises a screening barrel, a large screening plate, a small screening plate, an anti-collision net and a dust removal net. According to the pulverizer with the ore screening function, in the ore conveying process of the iron removal assembly, iron ore can be magnetically attracted to the conveying belt through the magnet and scraped into the collecting box through the scraping plate, the iron ore in the ore is removed, the dust removal assembly is arranged, the screening barrel rotates, and therefore the ore falls off from the large screening plate and the small screening plate; and small particles are thrown out of the screening barrel under the action of centrifugal force, so that dust particles in the screening barrel are reduced, and a worker is prevented from inhaling a large amount of dust when taking screened ore.