62 results about "Ironstone" patented technology

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 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.

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 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 discloses an iron ore multistage vibrating screen which comprises a bottom plate, the top end of the bottom plate is fixedly connected with a screening mechanism, the screening mechanism comprises a first connecting column, the first connecting column is fixedly arranged at the top end of the bottom plate, and the bottom end of the first connecting column is fixedly connected with a first motor. The driven rotating disc is driven to rotate through the transmission belt, the eccentric column converts rotating motion into reciprocating swing of the driving column, the driving column pushes the screening disc to conduct high-frequency vibration through the second fixing column, iron ore is layered according to the particle size under the vibration effect, small-particle iron ore and impurities fall down through screening holes, and large-particle iron ore stays on the surface of the screening disc. When the first motor stops working, large-particle iron ore can be manually taken out, the static contact time of the ore and impurities is shortened through dynamic screening, it is avoided that the impurities are embedded into the ore in the crushing process, efficient and uniform screening is achieved through the multi-stage linkage design, and the impurity embedding risk is remarkably reduced.

The application discloses a reagent for promoting the flotation separation of iron ore and associated iron-containing silicates, which is used for adsorbing excessive Ca 2+ Ions in the flotation circulating water and selectively separating specularite and chlorite by reverse flotation. The reagent is sequentially added in a suitable pH environment and reverse flotation operation can effectively promote the difference in floatability between iron ore and iron-containing silicates and reduce the excessive Ca 2+ Ions in the flotation circulating water. The quality of iron concentrate can be improved by reverse flotation. The reagent has high adaptability to the flotation environment and can maintain good flotation performance in a common environment with pH=6-8. Excellent separation effect can be achieved under the condition of low dosage, and the phenomenon of excessive Ca 2+ Ions in the flotation circulating water caused by the collapse of the mining filling body into the concentrate can be effectively improved. Compared with the conventional iron ore depressant starch and dextrin used alone, the pre-adsorption reagent system can obtain better iron ore concentrate index through reverse flotation, and further reduce the gangue inclusion and dissolved Ca 2+ Ions in the flotation circulating water.

The utility model discloses an automatic ore discharge de-ironing separator for mining, which comprises a frame body and a fixed frame, a conveyor belt is arranged in the frame body, the frame body penetrates through the fixed frame, a sliding plate is arranged in the fixed frame, first sliding chutes are arranged on both sides of the fixed frame, the sliding plate moves along the groove direction of the first sliding chutes, and the first sliding chutes are arranged on the fixed frame. A lead screw is rotationally connected into the fixing frame, the lead screw penetrates through the sliding plate and is in threaded connection with the sliding plate, a motor is fixedly connected to the top of the fixing frame, and one end of an output shaft of the motor penetrates through the fixing frame and is fixed to the lead screw. According to the iron remover, the distance between the magnetic ring and the conveying belt can be changed, so that iron ore or magnetic minerals can be better adsorbed and removed, the screening effect of iron impurities or magnetic minerals is improved, the adsorbed iron impurities or magnetic minerals can be conveniently separated from the magnetic ring, the use convenience of the iron remover is improved, and the iron remover is suitable for popularization and application. And workers can conveniently collect discharged iron impurities or magnetic minerals.

The invention provides a two-section screening process of a port iron ore separation warehouse and an intelligent control system. The intelligent control system comprises a feeding system, a first-section coarse screening system, a first-section undersize conveying system, a second-section fine screening system, a finished product grading and storing system and the intelligent control system which are sequentially connected. Wherein the first-section coarse screening system is used for carrying out primary separation of large-particle-size impurities and super-specification ores on iron ores entering a port; the second-section fine screening system is used for carrying out size fraction fine separation on the qualified ore subjected to the first-section screening; the intelligent control system is used for carrying out real-time monitoring, analysis and self-adaptive regulation and control on equipment running states, material particle size distribution, processing capacity and energy consumption parameters in the two-stage screening process, and therefore efficient, stable and low-energy-consumption sorting operation of iron ore is achieved.

The invention discloses a system and method for reducing the circulating load capacity of a refractory iron ore dry-method pulverizing system, and belongs to the technical field of mineral processing engineering. In order to solve the problems that in the dry-method powder making process of refractory iron ore, due to circulation accumulation of refractory minerals in the system, the load is increased, and a dynamic powder concentrator is prone to swelling, a parallel auxiliary powder grinding subsystem is additionally arranged on the basis of an original system. According to the system, an electric bar valve and a branch pipe are additionally arranged on a coarse-fraction discharge pipe of a dynamic powder concentrator, sorted coarse-fraction materials (0-5 mm) difficult to grind are shunted to a second surge bin, and then are specially ground by second powder making equipment until the qualified fineness that the content of-74 microns is 50% + / -5% is achieved. After being collected by a second cyclone separator, the ground product is conveyed back to the main system by a second air cushion type conveyor; the dusty gas is recycled through the second circulating fan part, and the rest of the dusty gas is connected into the original dust removal system. When the circulation load of the main system exceeds a set threshold value (such as 80% of a design value), the shunt grinding process is started, and when the load is recovered to a normal range (such as below 50% of the design value), the original process is switched back. The circulating load of the system is effectively reduced, the hidden danger of material accumulation of equipment is avoided, and the operation stability of the system and the adaptability to complex ore are improved.

The invention relates to a treatment method for high-mud-content secondary oxidation gold-containing iron ore. The treatment method comprises the steps of abrasive washing-gravity separation and tailing pre-discarding; performing two-stage magnetic separation and secondary enrichment; finely grinding and grading the pre-enriched high-grade minerals; cyanidation leaching; and recovering iron through two-stage magnetic separation. According to the method, two times of pre-enrichment and one time of cyanide-free tailing pre-discarding are achieved through the synergistic effect of abrasive washing-reselection tailing pre-discarding and weak magnetic-strong magnetic secondary enrichment, a large amount of soil, decomposed rocks and gangue are removed in advance at the front end of the grading process to serve as cyanide-free tailings, fine-grained and micro-fine-grained iron minerals in the pre-discarded tailings are fully recycled, and the purpose of recycling the iron minerals in the pre-discarded tailings is achieved. And loss of gold, silver and iron is reduced to the greatest extent. And then, the pre-enriched high-grade minerals are finely ground and graded, so that gold, silver and iron mineral monomers are fully dissociated, and a foundation is laid for subsequent cyanidation leaching and efficient separation of magnets and limonite. And finally, efficient gradient recovery of gold, silver and iron is achieved through the cyanidation leaching-two-stage magnetic separation technology, and the cyanide-containing tailings are lightened while the resource utilization rate is maximized.

The invention relates to the technical field of miners, in particular to an efficient magnetic separation device for iron ore production, which comprises a water guide pipe inserted on one side of a water outlet pipe in a penetrating manner, a flushing pipe is mounted at the bottom end of the water guide pipe and consists of a plurality of small-aperture conical nozzles, and flexible baffles are arranged on two sides of the outside of the flushing pipe. The flexible baffle is used for concentrating water flow and improving the flushing capacity, the flushing assembly is arranged, a water diversion pipe of the flushing assembly introduces a high-pressure water source, clustered high-pressure water flow is sprayed out through a flushing pipe composed of a plurality of small-aperture conical nozzles, a circulation channel can be flushed in time, and manual shutdown cleaning is not needed; the problem that discharging of the non-magnetic mineral end of an existing magnetic separation device is easy to block is solved, the flexible baffles arranged on the two sides of the outer portion of the flushing pipe can effectively concentrate water flow and prevent high-pressure water from being splashed towards the two sides ineffectively, the impact force of unit water flow is remarkably improved, and then the timely flushing efficiency is improved.

The invention provides an iron ore continuous screening and sorting method based on surge bin cooperative control, which comprises the following steps: (1) continuously conveying iron ore into a surge bin arranged at the front end of a screening system, and temporarily storing and homogenizing the iron ore; (2) collecting the material level change of the surge bin, the discharge flow and the running state parameters of the screening system in real time; (3) according to the collected parameters, the discharging speed of the surge bin and the processing capacity of the screening system are cooperatively matched; and (4) the iron ore is continuously screened and separated in the screening process, the operation parameters of the surge bin and the screening system are dynamically adjusted according to the screening effect, and therefore continuous and stable screening and separation operation of the iron ore is achieved.

The application provides a strong and weak magnetic mixed iron ore preselection process and relates to the technical field of mineral processing. The strong and weak magnetic mixed iron ore preselection process is a composite separation mode of dry magnetic separation+photoelectric sorting, and the composite separation mode needs to be cooperatively carried out in cooperation with a crushing mode; specifically, first, the granularity of the raw ore is crushed to the most suitable separation granularity for dry magnetic separation and photoelectric sorting, and then the strong and weak magnetic iron ore in the mixed iron ore is recovered through dry magnetic separation and photoelectric sorting technology respectively. The strong magnetic iron concentrate is first separated and then the weak magnetic iron concentrate is separated through the cooperative use of the dry magnetic separation waste throwing and the ore particle photoelectric sorting technology, and the separation process needs to cooperate with the judgment condition "r2>=r4" to select the crushing section number and the corresponding particle size selection. The method has the advantages of low cost, high efficiency, simple influencing factors, convenient simulation calculation results, wide application range, and is beneficial to industrial production practice and large-scale promotion.

The invention belongs to the technical field of boron detection, and particularly relates to a method for detecting the content of boron in iron ore and application. The method comprises the following steps: adding a mixed acid of nitric acid, hydrochloric acid and hydrofluoric acid into a to-be-detected iron ore sample, and completely decomposing the to-be-detected iron ore sample through microwave digestion to obtain a sample solution; adding calcium salt into the sample solution, adjusting the pH value, enabling fluorine ions in the sample solution to form calcium fluoride precipitates, enabling iron and niobium interference elements in the sample solution to form hydroxide precipitates, and filtering out the calcium fluoride precipitates and the hydroxide precipitates to obtain a filtrate without matrix interference; a standard addition method is adopted, a series of boron standard solutions are added into the filtrate, the spectral line intensity of the series of solutions at the position of 249.678 nm is measured, a working curve is established, and the boron content in the iron ore sample to be measured is calculated through an extrapolation method. The three major pain points of iron and niobium interference, fluorine corrosion and lengthy process are solved in series.

This invention discloses a method for determining the elemental content of iron ore using variable importance-artificial neural network-assisted laser-induced breakdown spectroscopy. The method includes the following steps: S1: Collect LIBS spectral data and elemental content data from at least 13 batches of iron ore in at least four categories. Use radiometric analysis (RF) to measure the importance of LIBS spectral features. A variable importance threshold is used to optimize the input variables of the BP-ANN model. The variable importance threshold and the number of neurons in the BP-ANN model are optimized using the determination coefficients and root mean square error of five-fold cross-validation to establish a VI-BP-ANN model. S2: Using the VI-BP-ANN model from S1, input the LIBS spectral data. The model ranks the features according to variable importance and calculates the elemental content in the iron ore. This invention's detection method can rapidly detect the total iron content, calcium content, magnesium content, aluminum content, and silicon content in iron ore.

The invention belongs to the technical field of blast furnace ironmaking, and relates to an iron ore value evaluation method, which specifically comprises the following steps: taking dry iron ore actually used in production as a reference material, determining the content of each chemical component in to-be-evaluated iron ore and the reference material, and evaluating the value of the iron ore according to the chemical component difference between the to-be-evaluated iron ore and the reference material. According to the evaluation method provided by the invention, the whole-process cost elements are integrated, the quantitative evaluation model based on the component difference is established, the evaluation method fits actual production and operation, a scientific basis is provided for the addition amount of the flux and the fuel, an expected reference is provided for the recovery of the slag and the coal gas, and the method has a wide application prospect.

To provide a selection method capable of efficiently classifying and selecting iron ore into a plurality of divisions corresponding to a phosphorous content.SOLUTION: The present invention includes a threshold determination step ST1 for determining a first threshold value and a second threshold value using a threshold determination image obtained by capturing an image of a threshold determination iron ore, and a sorting step ST2 for classifying and sorting the sorting target iron ore into three sections, first to third sections, using a sorting target image obtained by capturing an image of the sorting target iron ore and the first and second threshold values. In the threshold determination step ST1, the first and second threshold values are determined so that in the threshold determination image, the intensity value of the R component in a pixel region corresponding to a yellowish brown threshold determination iron ore≥the first threshold value, the second threshold value≤the intensity value of the R component in a pixel region corresponding to a reddish brown threshold determination iron ore<the first threshold value, and the intensity value of the R component in a pixel region corresponding to a blackish threshold determination iron ore<the second threshold value.SELECTED DRAWING: Figure 2

The application discloses a kind of iron ore fluidized roasting atomized water cooling powdering device, vertical cylinder structure is used, including cylinder, cylinder is sequentially divided into first stage shunt section, first stage cooling section, dispersion section, collection section, second stage shunt section, second stage cooling section, scattering section, third stage cooling section and third stage shunt section along height direction;First stage shunt section cylinder top is material inlet;Third stage shunt section cylinder bottom is material outlet;Cooling section is equipped with atomized water cooling spray head and nozzle;The device of the application utilizes atomized water to directly cool high-temperature iron ore material, reduces the heat transfer thermal resistance between roasted ore and cooling medium, and speeds up the cooling speed;At the end of cooling, the material is scattered to solve the problem of material blocking the discharge port;When iron ore material is stored, the material has a certain moisture content, which can reduce the heat storage in the material during dry powder storage and prevent the oxidation of stored material;The application also has the characteristics of simple structure, easy disassembly and assembly, and meets the requirements of industrial large-scale application.

The utility model relates to the technical field of iron ore, and discloses an iron ore solid waste rapid detection device which comprises a machine body and a frame fixedly connected with the inner wall of the machine body, a detection assembly is arranged in the frame, and the detection assembly comprises a rotary conveying frame. According to the rapid detection device for the iron ore solid waste, the detection assembly is arranged, in the separation link, a plurality of electromagnetic iron rods capable of swinging flexibly swing in the conveying groove and turn over ore chippings, the limitation that in a traditional separation mode, iron ore and an adsorption part are not in uniform contact is broken through, it is ensured that each iron ore has the chance to make full contact with the corresponding electromagnetic iron rod, and the separation efficiency is improved. The device realizes uniform adsorption, improves the separation efficiency and purity of the iron ore, effectively reduces the mixing of other ores, weighs the iron ore to detect the iron content after separation, provides visual and accurate data support for ore quality evaluation, facilitates reasonable adjustment of a subsequent processing technology, timely conveys other ores to other areas, and improves the iron ore quality. And classified treatment of different ores is realized.

To provide a method for producing an iron-making raw material in which gangue contained in low-grade iron ore is sufficiently removed and a gangue ratio is sufficiently suppressed under a production condition in which energy consumption is suppressed.SOLUTION: A pulverization step of pulverizing the reduced product to obtain a pulverized product containing iron-containing particles having a volume-based cumulative particle size 1A of 100 μm or more, and a magnetic separation step of magnetically separating the pulverized product to recover the iron-containing particles as a magnetically attractable substance, the iron-containing particles having a volume-based cumulative particle size Fe3O4 of 100 μm or more, and the iron-containing particles having a gangue ratio of 10% or more, the gangue ratio being determined by the following formula (D50Fe): Gangue ratio of iron ores (%) = (SiO2 + Al2O3) / T. Fe * 100 (1A) In the formula (1A), SiO2, Al2O3, and T. Fe represent the amount of SiO2 (mass%), the amount of Al2O3 (mass%), and the total amount of iron (mass%) in the iron ores, respectively.SELECTED DRAWING: Figure 7

Reduction reactor and process of effecting reduction of iron ore material to reduced iron material. The process comprising to feed (101) iron ore material into a reduction reactor (1) at a top portion (1a) thereof, creating a gravitational flow of the material in the reduction reactor from the top portion (1a), axially downwards towards a bottom portion (1b) of the reduction reactor (1); to feed (102) a heated reduction gas into the reduction reactor (1) at the top portion (1a) of the reduction reactor, such that the reduction gas creates a co-current flow with the gravitational flow of the material in the reduction reactor (1), and by means of the reduction gas reducing (103) the iron ore material to reduced iron material in the reduction reactor.

Provided is semi-reduced HBI for which semi-reduced iron produced from low-grade iron ore or iron ore pellets can be used as a raw material and which has excellent meltability and has an apparent density that makes marine transportation possible. The semi-reduced HBI is obtained by hot forming semi-reduced iron. The semi-reduced HBI has a total iron content of 80-90 mass%, a metallization rate of 70-90%, an apparent density of 5.0-5.5 g / cm3, and a mass ratio of CaO to SiO2 (CaO / SiO2) of 0.10-0.70.

The invention relates to the technical field of iron ore screening, and discloses a good-performance screening device for high-purity iron ore, which comprises a support assembly, a feeding assembly is mounted on one side of the top of the support assembly, a screening assembly is mounted in the middle of the top of the support assembly through a transmission assembly, and a flushing assembly is correspondingly arranged between the feeding assembly and the screening assembly. The flushing assembly is fixedly installed on one side of the top of the support assembly. According to the ore screening device, a flushing assembly is mounted on the device, so that when the device is used, the device can be flushed through the arranged flushing assembly before screening, and the situation that screening errors are caused by the fact that ores are prevented from adhering to soil is avoided.

The present invention provides a method and apparatus for producing iron from an iron ore, together with an option for the onward conversion of that iron into steel. The iron may come from an iron ore in which the iron is present as at least one of the mineral and mineraloid forms of iron oxide and iron oxyhydroxide, such as hematite and limonite, as well as from red bauxite. The invention may also be used to produce elemental iron from other sources of iron oxide, such as from mill scale, whereby sources of waste iron oxide may be recycled. The method comprises comminuting the iron ore into fines, dehydrating the iron ore and dehydroxylating hydroxylated compounds in the ore. The ore thus treated is then reacted with an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and iron oxide(s) from the ore. This precipitates out from the liquid sodium both elemental iron and other insoluble products at least comprising sodium oxide. The redox reaction is conducted in an inert atmosphere and its temperature is controlled to remain below about 450 °Celsius to inhibit the production of ternary oxides like Na4FeO3. The method then comprises separating the iron from the other insoluble products, for example using magnetic and / or density-based separation, and separating the iron and the other insoluble products as a solid phase from the liquid sodium, in any order. Thus iron can be extracted from iron ore without producing any greenhouse gas emissions, and sodium oxide, which has a high affinity for carbon dioxide, is produced as a co-product. Since the iron is produced as a finely divided particulate, it may subsequently be converted into steel using a powder metallurgical technique with a considerable energy saving over prior art steelmaking techniques. If the sodium oxide is used to mineralize captured carbon dioxide, the invention can have a negative carbon footprint overall. If the iron ore comprises red bauxite, the other insoluble products may also be processed to extract alumina from them without creating environmentally hazardous red mud. In some embodiments, the other insoluble products may be used to produce an alkaline activator for an alkaline activated or geopolymer cement. The corresponding apparatus (3a) comprises a comminution device (2) (such as a rock crusher or grinder), a dryer (4) for dehydrating and dehydroxylating the iron ore, a gas-tight reaction vessel (130) for reacting the treated ore with the liquid sodium, a solid-species separator (180a) for separating the iron from the other insoluble products and a solid-liquid sodium phase separator (190a, 190b).

The application provides an iron ore sorting method based on hyperspectral images and spectral decomposition, comprising: S1. Pretreatment: collecting hyperspectral images of iron ore, and extracting average spectral curves of each piece of iron ore; S2. Feature extraction: decomposing the average spectral curves of the iron ore by variational mode decomposition, and extracting features from the decomposed signals; S3. Predicting iron content: combining random forest regression to predict the total iron content of each piece of iron ore; and S4. Sorting: sorting the iron ore into multiple grades according to the predicted total iron content. The application takes the hyperspectral images of the iron ore as the research object, realizes the prediction of the iron content by combining the features extracted after decomposing the average spectrum of the iron ore with the random forest, and further objectively, quickly and accurately sorts the iron ore, solving the problem of lacking suitable spectral features and suitable prediction models in the sorting of the iron ore using the hyperspectral imaging technology.

The utility model relates to the technical field of ore extraction, and discloses an automatic identification device for foreign inclusions in iron ore, which comprises two belt conveyors, the two belt conveyors are contacted with each other, and the conveying directions of the two belt conveyors are opposite. According to the automatic recognition device for the foreign inclusions in the iron ore, through cooperative work of the visual detection module and the sorting mechanism, automatic recognition, positioning and grabbing of non-ore foreign matter mixed in the iron ore are achieved, the manual inspection cost is remarkably reduced, the sorting efficiency and accuracy are improved, damage of the foreign matter to follow-up machining equipment is avoided, and the practicability is high. The belt conveyors running in the reverse direction are combined with the auger piece structure with the adjustable gap, qualified ore can be blocked and guided to the adjacent belt conveyors, leaked unqualified small-particle slag can be screened, synchronous classified conveying of the ore and impurities is achieved, and the material treatment process is optimized.

The invention relates to the technical field of pellet production, in particular to a fluxed pellet produced by taking high-silicon iron ore resources as raw materials and a preparation smelting method, a pelletizing mixture for the fluxed pellet is prepared by blending and mixing fine iron powder and high-iron red mud according to the mass ratio of (7-9): (1-3), the high-iron red mud is prepared from the following raw materials in percentage by weight: less than or equal to 4.5% of SiO2, more than or equal to 2wt% of Al2O3 and 0.5-1.0 wt% of Na2O + K2O, the content of TFe in the high-iron red mud is more than or equal to 40%, the content of CaO is more than or equal to 10wt%, the content of SiO2 is less than or equal to 10.0 wt%, the content of Al2O3 is more than or equal to 20wt%, and the content of Na2O + K2O is 3.0-6.0 wt%. The green and environment-friendly recycling of the red mud is realized.

The present invention relates to a process for producing a concentrate enriched in iron mineral content from an ore comprising iron minerals and silicates by reverse flotation, said process comprising the step of adding a first amine to an aqueous slurry of said ore prepared and optionally one or more flotation aids to obtain an aqueous mixture, wherein the first amine (A) is a compound of formula I, a salt of a protonated compound of formula I and a first anion or a mixture thereof. A second amine can be further added, which is a compound of formula II, a salt of a protonated compound of formula II and a second anion or a mixture thereof. Furthermore, specific compositions of the first amine (A) and the second amine (B) are described for use as a flotation collector.

This invention designs a method and system for iron ore conveyor belt sampling, belonging to the field of iron ore sampling technology. It acquires real-time cross-sectional contour data of the material flow using a 3D laser contour scanning unit and a surface texture imaging unit. Based on the cross-sectional contour data, it calculates the instantaneous virtual mass flux and the material flow morphology dispersion. The sampling trigger threshold is adaptively adjusted based on the material flow morphology dispersion. The instantaneous virtual mass flux is integrated to obtain the cumulative flux, and sampling is triggered when the threshold is reached. The lateral movement speed of the sampling head is dynamically adjusted according to the material layer thickness distribution to achieve variable-speed cutting. Closed-loop correction is performed through weighing feedback. The system includes a 3D laser contour scanning unit, a surface texture imaging unit, an intelligent sampling control terminal, a frequency converter-driven sampler, and a weighing feedback unit. This invention solves the sampling deviation problem caused by uneven material flow distribution and improves sample representativeness.