108 results about "Ironstone" patented technology

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 a foundation pit water gushing iron ore grading thixotropic blockage reduction method which comprises the steps that iron ore tailings are crushed and screened into multi-stage particle size particles, and a customized mold is subjected to 3D printing based on foundation pit scanning data; paving particles in a mold layer by layer, doping iron powder, and cementing and curing cement paste to form a prefabricated body; the prefabricated body is installed to a water gushing area, the slurry viscosity is increased through a grading contact network, a weak gravitational flow state is triggered to be transiently changed to an anti-scouring state, and water flow speed reduction is achieved; alternating field induction micro-vibration is synchronously started during lateral grouting, and grout permeation and bubble discharge are driven; after solidification, the guide core body is pulled away, and remaining pore channels are self-compacted by a grading system to form an anti-seepage structure. The method has the advantages that the anti-scouring performance is enhanced; particle-slurry-foundation pit curved surface triple self-adaptive combination is carried out; the engineering cost is reduced.

The present invention relates to a production expert system-based iron ore blending optimization method. The method comprises: firstly, performing data enhancement on historical ore blending and beneficiation data by means of an improved generative adversarial network; then, establishing a case library, and by means of a case retrieval method, establishing a relational model between blended ore properties and ore concentrate grades on the basis of the historical ore blending and beneficiation data and expert experience; then, on the basis of material balance, establishing a blended ore property prediction mechanism model to realize blended ore property estimation after ore blending; and finally, by taking an optimal ore beneficiation concentrate grade and a maximum difficult-to-beneficiate ore use amount as optimization objectives, determining constraints on the basis of actual working conditions, obtaining a set of ore blending proportion non-inferior solutions by means of a multi-objective grey wolf algorithm, and deciding an optimal solution by means of a TOPSIS algorithm. The present invention has the following advantages: while ensuring the quality of ore beneficiation products, reasonable ore blending proportions are calculated, the use amount of difficult-to-beneficiate ores is increased, the sustainable mining capacity of mines is improved while ensuring the mining and beneficiation benefits, and the invention has universal applicability.

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.

To identify iron ore having high dephosphorization efficiency by a reduction heat treatment method.SOLUTION: The present invention relates to a method for sorting iron ore that facilitates removal of phosphorus by a reduction heat treatment technique, the method including an X-ray diffraction measurement step of performing X-ray diffraction measurement on the iron ore. The iron ore is determined to be more easily subjected to phosphorus removal by the reduction heat treatment technique as a shift, relative to a goethite reference peak, of at least one peak attributed to goethite observed in an X-ray diffraction pattern becomes larger.SELECTED DRAWING: Figure 1A

The invention provides a method for determining boron element in iron ore, which comprises the following steps: weighing 0.2 g of sample, uniformly mixing with a flux, heating to red at 700-800 DEG C, cooling, adding sodium peroxide for secondary melting, dissolving in water, and transferring to a beaker; adding ethanol to boil, fixing the volume to 500mL, filtering and taking 100mL, adjusting the pH value, adding hydrogen peroxide to slightly boil, cooling, adding barium carbonate to boil, diluting and filtering, and taking 25mL for color development determination. According to the method, sodium carbonate and / or potassium carbonate and sodium peroxide are adopted to form a composite flux, an iron ore sample is completely decomposed through secondary melting and step-by-step dissolution, and the sample decomposition efficiency is improved; the method is stable in recovery rate, is superior to a conventional method in precision, can accurately measure the boron content in the iron ore, meets the technical requirements on boron element detection in the fields of ferrous metallurgy, geological exploration and the like, provides an efficient and reliable detection means for boron content analysis, and ensures the accuracy and reproducibility of a detection result.

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 invention discloses a combined determination method for the tin content of iron ore, which is characterized by comprising the following steps: drawing a calibration curve; selecting measurement parameters of an instrument; weighing a sample; sample melting: uniformly mixing the weighed sample with a mixed flux in a certain proportion, and melting in a muffle furnace; extracting a sample: extracting the fused sample by using hydrochloric acid, and fixing the volume for detection; and sample determination: determining by using an inductively coupled plasma emission spectrometer, determining the intensity value of each element by drawing a standard curve method, and calculating the final content of the element according to a calibration curve made by a standard solution. The invention aims to provide the combined determination method for the tin content of the iron ore, through experiments, the accuracy of determining the standard substance and the tin element of the tin-containing iron ore can be guaranteed, and through standard recovery experiments, the recovery rate is 95% or above. The method is used for production practice, and is an effective and practical method.

Modifier compositions, improved sparge compositions for froth flotation separation containing the modifier compositions, and improved methods of froth flotation using the modifier compositions have been developed, as well as kits including the modifier composition for industrial use. The modifier compositions obtain both improved yield and a higher grade of a targeted mineral product in froth flotation of one or more phosphate, lithium, and / or iron ores, while avoiding excess foam formation during the flotation.

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 value analysis device which comprises a grade analyzer which comprises a gun head and a handle, and the gun head is fixed at the upper end of the handle; the first protection assembly comprises first fixing plates, a first connecting shaft, a first torsional spring, a first protection plate and a limiting column, the first fixing plates are fixed to the middle of the lower surface of the gun head and located on the side edge of the top of the handle, the first connecting shaft is fixed between the first fixing plates, and the first torsional spring is connected to the first connecting shaft in a sleeving mode; one end of the limiting column is fixed to the lower end of the side edge of the first protection plate, and the other end of the limiting column is attached to the handle. The utility model relates to an iron ore grade analyzer, and aims to solve the problem that when the iron ore grade analyzer is used, an operator holds a handle, presses a button and starts an X-ray, and the X-ray is a radiation source, so that the risk of radiation exposure to the operator and the surrounding environment is possibly caused if the X-ray is emitted due to misoperation.

The application discloses an iron ore element component analyzer and particularly relates to the technical field of ore component detection. The length of the ore analysis equipment can be adjusted through the telescopic adjusting assembly, so that the ore analysis equipment can be put into narrow gaps for detection, avoiding the trouble of breaking and disassembling the ore for detection and the damage to the ore. In addition, the auxiliary adjusting structure can cooperate with the telescopic adjusting assembly to control the movement of the tooth rod, so that the tooth rod and the rotary transmission structure are engaged and transmitted, the ore analysis equipment is adjusted in angle, the different surfaces of the corresponding ore in the narrow gap can be adjusted, the detection of the ore elements is facilitated, the telescopic adjusting of the ore analysis equipment can meet the detection of the gaps with different depths and different positions, and the detection of the iron ore elements is more flexible through the angle.

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 an Anshan type magnetite-hematite mixed iron ore diversion separation method which comprises the following steps: feeding raw ore into a first-section closed circuit grinding system and a second-section closed circuit grinding system, performing overflow feeding of a second-section cyclone into first-section barrel type low-intensity magnetic separation operation to obtain first-section low-intensity magnetic concentrate and tailings, performing second-section electromagnetic concentration operation on the first-section low-intensity magnetic concentrate to obtain first-section low-intensity magnetic concentrate and tailings, and performing second-section electromagnetic concentration operation on the first-section low-intensity magnetic concentrate; the first-section weak magnetic tailings and the second-section electromagnetic concentration tailings are combined and fed into high-intensity magnetic separation operation to obtain high-intensity magnetic concentrates and tailings, the high-intensity magnetic concentrates are fed into reverse flotation operation to obtain reverse flotation concentrates and tailings, and the reverse flotation concentrates and the electromagnetic concentration concentrates are combined to serve as final qualified iron concentrates. The strong magnetic tailings and the reverse flotation tailings are combined and discharged as final tailings. According to the method, easy-to-separate strong magnetic magnetite is recovered through a single low-intensity magnetic separation process, weak magnetic hematite is recovered in combination with a strong magnetic-reverse flotation process, and reselection operation is not needed, so that the separation process is simplified, the separation efficiency is improved, and the production cost is reduced.

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 belongs to the technical field of beneficiation process control and optimization, and discloses a low-grade iron ore magnetic separation process efficiency prediction and energy consumption optimization system and method. The spatial position and intensity distribution of an eddy current area are accurately identified by acquiring flow field velocity distribution and ore particle granularity composition data of ore pulp in a groove body of the magnetic separator; acquiring three-dimensional distribution data of magnetic induction intensity, and identifying a magnetic field distortion area; calculating a short-circuit risk coefficient based on the space overlapping degree, and constructing an ore grain movement track deviation model; identifying a sorting abnormal mode by monitoring the fluctuation characteristics of the tailing grade and the concentrate yield in real time; and according to the relevance between the abnormal mode and the efficiency loss rate, the magnetic field intensity distribution, the ore pulp flow velocity and other process parameters are dynamically adjusted. According to the method, the ore grain behavior is accurately predicted under the magnetic field-flow field coupling effect, a parameter self-adaptive optimization mechanism based on data driving is established, the concentrate grade and the recovery rate of low-grade iron ore are remarkably improved, and meanwhile energy consumption is reduced.

The invention provides a weak magnetic refractory iron ore coarse fraction pre-refining process which comprises the following steps: according to different characteristics of weak magnetic iron ores with the fractions of 0-3mm, 3-15mm and 15-50mm, respectively adopting different refining processes for treatment; wherein the weakly magnetic iron ore with the particle size of 0-3 mm is subjected to wet type coarse particle size pre-refining by adopting a strong magnetic machine with the field intensity of 600 mT, and the refining grade reaches 47% or above; the weakly magnetic iron ore with the size fraction of 3-15 mm is refined through a 6000 GS high-intensity magnetic separator, and the refined grade reaches 46% or above; the weak magnetic iron ore with the size fraction of 15-50 mm is refined by adopting X-ray intelligent separation equipment, and the refined grade reaches 45% or above; the method comprises the following steps: crushing and finely grinding the extracted coarse fraction concentrates with the particle fractions of 0-3mm, 3-15mm and 15-50mm to 70% of-200 meshes, and desliming to obtain the non-magnetite concentrate with the grade of 49.5% or above and the burning loss of 19%, thereby realizing the effective utilization of the weakly magnetic refractory iron ore.

The invention discloses a purification method of quartz sand tailings, and relates to the technical field of quartz sand production. According to the method, firstly, the quartz sand tailings are pretreated, iron ore in the tailings is made to generate gaseous ferric chloride and titanium chloride by adding sodium chloride to be removed, and under the action of microwaves, cracks are generated and cracked on interfaces between minerals, so that fine impurities in the tailings are exposed, and then the acid etching effect is enhanced; the ultrasonic action can enhance the reaction of mineral substances with acid and chlorine and can further crush fine particles, then through ball milling, quartz sand is in a mineral monomer dissociation state, then through high temperature, an iron phase existing in the form of limonite in tailings is converted into a magnetic iron phase, then the iron phase is separated from a quartz phase, and the iron phase is separated from the quartz phase. The method comprises the following steps of: firstly, performing high-temperature calcination on a cross section, then roasting under reducing gas to complete enrichment of iron, and simultaneously performing high-temperature calcination to expose aluminum atoms on the cross section, and further performing accurate impurity removal on the aluminum atoms through microorganisms to obtain high-purity quartz.

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 application discloses a method for determining optimal grinding fineness and a method for efficiently recovering associated fragile beneficial minerals and iron concentrates in primary iron ores, wherein concentrate indexes under each fineness condition are calculated according to process mineralogy parameters, and then optimal grinding fineness is obtained, and the method can be applied to the recovery field of all minerals and metallurgical products. Based on the above idea, the best one-stage grinding fineness and two-stage grinding fineness are calculated in the method for recovering associated fragile beneficial minerals and iron concentrates in primary iron ores, the super-pure iron concentrate / iron concentrate, associated fragile beneficial mineral concentrate and iron coarse concentrate are obtained in turn by adopting a magnetic separation-flotation combined method under the one-stage grinding fineness, and then the iron coarse concentrate is finely ground to the two-stage grinding fineness and then subjected to weak magnetic separation to recover the remaining qualified iron concentrate. The application can determine the optimal grinding fineness and formulate the optimal beneficiation process in advance when no ore dressing operation is performed, and not only can the production cost be reduced and the product quality be improved, but also the high-quality utilization of resources is realized.

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.

To provide a selection method enabling efficient separation and selection of iron ore into iron ore having a large amount of gangue component and iron ore having a small amount of the gangue component, and enabling sorting of the iron ore having a small amount of the gangue component to a sintering step.SOLUTION: A selection method for iron ore has: a threshold value determination step ST1 determining a threshold value for intensity value of a component B by using an image for determining threshold value which is captured by imaging iron ore for determining threshold value; and a selection step ST2 classifying and selecting the subject iron ore for selection into a subject iron ore for selection of a first section corresponding to a pixel region where the intensity value of component B is the threshold value or more in the subject image for selection and a subject iron ore for selection of a second section corresponding to a pixel region where the intensity value of component B is less than a threshold value in the subject image for selection, by using a subject image for selection which is captured by imaging a subject iron ore for selection and the threshold value. In the selection step, the subject iron ore for selection in selected second section is sorted to a sinter step. Further, in the selection step, the subject iron ore for selection in the selected first section is sorted to an iron ore pulverization step ST3.SELECTED DRAWING: Figure 2