498 results about "Gravity separation" patented technology

The invention relates to the technical field of blood separation, in particular to a platelet concentration-based gravity separation system, which comprises a tension disturbance extraction module, a viscosity response positioning module, a sedimentation retarding judgment module, a platelet export judgment module and a concentration layer interface output module. According to the method, real-time extraction of tension change frequency and mutation amplitude is introduced, and a normalization processing mode of disturbance polymerization indexes is combined, so that a mechanical unstable area under tiny disturbance in the blood standing sedimentation process is effectively described, and the sensitive recognition capability on potential layered behavior changes is enhanced. Through continuous tracking of a viscosity behavior curve in a disturbance time period, an accurate time anchor point is provided for judgment of a subsequent liquid column motion state. On the basis of microscopic changes of the liquid column height and the rate, through combined judgment of the acceleration change trend and the attenuation amplitude, the settlement state is distinguished no longer depending on a macroscopic parameter threshold value, but is dynamically regulated and controlled through the change trend and a fluctuation sequence.

The invention discloses an electrolytic hydrogen production device pre-separation system based on a gravity separation principle, which comprises an electrolytic bath and a gas-liquid separator, a pre-separator is arranged on a material pipeline of the electrolytic bath entering the gas-liquid separator, a mixture inlet and a liquid outlet are arranged at the lower part of the pre-separator, and a gas outlet is arranged at the top of the pre-separator. The mixture inlet is connected with the outlet end of the electrolytic cell through a material pipeline, the liquid outlet is connected to a liquid phase in the gas-liquid separator through a liquid pipeline, and the gas outlet is connected to a top gas phase of the gas-liquid separator through a gas pipeline. The pre-separator is innovatively and additionally arranged. According to the gravity separation principle, a vertical cylindrical shell is adopted. By means of the layout, gas and liquid can be preliminarily separated within a very short time, the workload of a subsequent gas-liquid separator is greatly relieved, the overall separation efficiency is remarkably improved, and a solid foundation is laid for efficient operation of the whole electrolytic hydrogen production process.

The invention provides a method for measuring and calculating the article position of continuous silver ore with the particle size of 0.037 mm or above, and belongs to the technical field of mineral grade detection. The silver grade in the sample is measured and calculated through screening; leaching and measuring the content of silver monomers and continuous silver minerals, and reselecting to obtain a heavy sand product; carrying out fluorescent dyeing on the heavy sand product, and selecting monomer silver minerals; analyzing the color of the silver mineral through point scanning data of a scanning electron microscope, melting the monomer silver mineral to obtain the volume of the monomer silver mineral, and calculating the content of the monomer silver mineral; and carrying out conversion to obtain the continuous silver ore article position with the size of more than 0.037 mm. According to the method, the target mineral is rapidly and accurately obtained by adopting density medium reselection and fluorescent dye tracing; introducing a scanning electron microscope to measure and calculate the actual density of the silver mineral to replace the theoretical density, smelting the silver mineral in a mold, and carrying out volume measurement and calculation to obtain the actual metal amount closer to the actual silver mineral; measuring and calculating errors caused by impurities and irregular shapes of mineral particles are reduced; and the calculated grade of the silver mineral is more accurate.

The invention relates to the technical field of mine beneficiation, and discloses a placer movable type gravity separation system and method, and the placer movable type gravity separation system comprises a movable type bearing base, an impact crusher, a spiral classifier and a plurality of parallel shaking tables; a spiral classifier is matched with an intelligent concentration monitoring system. The intelligent concentration monitoring system is composed of an ore pulp concentration sensor, a flow sensor, a PLC and an electric adjusting valve. The feeding end of each shaking table is connected with the discharging end of the spiral classifier through a flow dividing pipeline, and a flow distributing valve is arranged on the flow dividing pipeline. A damping device and crawler-type moving wheels are integrated at the bottom of the movable bearing base, the whole machine is in communication connection with the equipment through a central control cabinet, and data communication and material conveying closed-loop linkage of the raw material crushing unit, the ore pulp grading and concentration regulation and control unit, the multi-machine parallel gravity separation unit, the movable operation regulation and control unit and the central control unit are achieved. The intelligent control framework has the advantages of being accurate in ore pulp concentration regulation and control, high in treatment capacity and stable and reliable in moving operation.

The present disclosure relates to the field of the preparation of high purity sodium and the safe treatment of sodium calcium slag, and discloses a method and apparatus for sodium slag recovery by using gravity separation—controllable combustion—alkaline liquor leaching process for the preparation of high purity sodium and safe treatment of sodium calcium slag. The method comprises the following steps: (1) subjecting a liquid sodium slag to a gravity stratification to obtain pure metallic sodium and high calcium content sodium slag; (2) roasting the high calcium content sodium slag to obtain a roasting slag; and (3) leaching the roasting slag by using an alkaline liquor to obtain the sodium hydroxide solution and calcium hydroxide. The method and apparatus provided by the present disclosure have advantages including high efficiency separation of sodium and calcium, saving separation time, safe and controllable production process, and continuous production process, thereby providing a safe and efficient method for the preparation of high purity sodium and safe treatment of new sodium calcium slag generated by the method, allowing continuous production of high purity sodium and safe recycle of new sodium calcium slag.

The invention relates to the technical field of lead-zinc ore beneficiation, in particular to a lead-zinc ore dense medium grading selection-flotation combined separation system and a separation process, and the system comprises a dense medium separation system and a flotation system. The dense medium separation system comprises a crushing and screening unit, a dense medium coarse fraction separation unit, a dense medium fine fraction separation unit and a fine ore water treatment unit, an outlet of the crushing and screening unit is divided into a coarse fraction outlet, a fine fraction outlet and a fine ore outlet, the coarse fraction outlet is connected with the dense medium coarse fraction separation unit, and the fine fraction outlet is connected with the fine ore water treatment unit; the fine fraction outlet is connected with the dense medium fine fraction separation system, the fine ore outlet is connected with the fine ore water treatment unit, and a coarse fraction gravity concentration concentrate outlet of the dense medium coarse fraction separation unit, a fine fraction gravity concentration concentrate outlet of the dense medium fine fraction separation unit and a concentrated fine ore outlet of the fine ore water treatment unit are connected with the flotation system. The method has the advantages of high economic benefit, low production cost, energy conservation, environment friendliness and the like, and the lead-zinc ore dressing efficiency and the metal recovery rate are effectively improved.

The invention provides a molybdenum mineral content measuring method, and belongs to the field of process mineralogy, and the method comprises the following steps: carrying out ore grinding, ore washing and desliming treatment on a to-be-measured sample to obtain slurry and ore washing concentrate; the ore washing concentrate is subjected to gravity separation, and gravity separation concentrate and gravity separation tailings are obtained through separation; mixing the slime and the gravity concentrate to obtain a mixed sample, and performing molybdenum phase analysis to obtain the content of molybdenum oxide; an automatic mineralogical analysis sample of the mixed sample and an automatic mineralogical analysis sample of the gravity separation tailings are prepared respectively, automatic mineralogical analysis is carried out, and a molybdenite content correction coefficient and a molybdenum oxide content correction coefficient are calculated; and calculating the content of various molybdenum minerals in the to-be-detected sample in combination with the correction coefficient and the mineral content data. By optimizing the sample preparation process, molybdenite oxidation is reduced, and the mineral recognition accuracy is improved. Molybdenum oxide and molybdenum sulfide are treated separately, different correction processes are adopted, and the accuracy of ore molybdenum mineral measurement is improved in a targeted mode.

The invention relates to the technical field of environmental protection equipment, and particularly discloses a continuous water-oil separation device which comprises a gravity separation tank and a pretreatment mechanism, a separation mechanism is mounted in the middle of the bottom end of the gravity separation tank, and a collection mechanism is jointly mounted between the lower part of the outer wall of the gravity separation tank and the middle of the bottom end of the separation mechanism; the separation mechanism comprises a centrifugal separation tank, an oil conveying pipe, an oil collecting hopper, a limiting ring, an adjusting tooth block and a hydrophilic oleophobic film; the oil conveying pipe is mounted at the top end of the centrifugal separation tank through a bearing; according to the oil-water separation device, oil-containing wastewater is subjected to gravity separation through the gravity separation tank, oil and water are subjected to centrifugal separation through the rotary centrifugal separation tank, and efficient oil-water separation can be achieved through the hydrophilic oleophobic film, so that the oil-water separation effect is further improved, and water and oil can be continuously and efficiently separated by adopting the separation device; the oil-water separation efficiency during treatment of a large amount of water-oil mixture is improved, and the requirements of modern industry on continuous, efficient and rapid oil-water separation can be met.

The invention provides a segmented coalescence system based on wettability gradient. The system comprises a storage tank, a segmented coalescer and a gravity separation tank, the segmented coalescer is composed of a plurality of layers of coalescence beds, a gravity separation area is clamped between every two layers of coalescence beds, through the wettability gradient design, the interface energy synergistic effect and optimized fluid dynamic characteristics are fully utilized, the separation efficiency reaches up to 98.50%, and the separation effect is good. The mixing design of the super-hydrophilic sand and the super-hydrophobic sand obviously enhances the wetting and coalescence efficiency of oil drops, the particle size gradient design realizes segmented coalescence of the oil drops, the lower layer of small-particle-size sand is demulsified and coalesces small oil drops, the upper layer of large-particle-size sand promotes combination of large oil drops, and the continuous water film and oil film structure effectively avoids the problem of pore channel blockage. And the bed pressure drop is reduced.

The invention provides an oily sewage treatment system and a treatment method thereof, and belongs to the technical field of sewage treatment. The system comprises: a sedimentation tank; a V-shaped oil separation tank; the ejector is used for ejecting the oily sewage settled by the settling tank into the V-shaped oil separation tank after passing through the ultrasonic device; the oil outlet pipe is used for discharging the floating oil into the heat exchanger for heat exchange; the vacuum separator is communicated with the heat exchanger; an oil tank; the water outlet pipe is used for discharging water into the activated carbon adsorption chamber; the VOC treatment tank is communicated with the activated carbon adsorption chamber and is used for receiving oil-containing waste gas generated in the regeneration process of the activated carbon adsorption chamber; the VOC treatment tank is provided with an adsorption chamber and a condensation chamber, and the VOC treatment tank is respectively connected with the heat exchanger through a compressor and an expansion valve to form a heat pump system. A gravity separation method and an air flotation method are combined, and meanwhile, an ultrasonic demulsification technology is used, so that the oil removal efficiency is improved. The energy consumption in the treatment process is reduced, and the resource utilization efficiency is further improved.

The present invention discloses a process for efficiently separating bastnasite and monazite from mixed rare earth concentrates, comprising the following steps: S1: The ore sample is subjected to primary centrifugal gravity separation for roughing. The gravity separation concentrate is finely ground, and after grinding, the gravity separation concentrate and the gravity separation tailings are mixed and then enter the flotation operation; S2: Water is added to adjust the pulp concentration and pH value, a sulfate composite inhibitor is added, a hydroxamic acid composite collector is added, and octanoic acid is added as a foaming agent for roughing to obtain a bastnasite roughing concentrate and a bastnasite roughing tailings; S3: The pH value of the bastnasite roughing concentrate pulp is adjusted, the same composite inhibitor and collector as those in the roughing are added, and two-stage cleaning is carried out to obtain a bastnasite concentrate; S4: The roughing tailings are finely ground, and scavenging is carried out after grinding; the pH value of the bastnasite roughing concentrate pulp is adjusted, the same composite inhibitor and collector as those in the roughing are added, and one-stage scavenging is carried out to obtain a monazite concentrate. The process of the present invention is simple and has less reagent consumption.

The invention relates to the technical field of agricultural separation equipment, in particular to a rape seed gravity separation and impurity removal device which comprises a machine body and a screening and impurity removal mechanism. The screening and impurity removing mechanism comprises a vibrating screen assembly and a negative pressure pumping and discharging assembly. The vibrating screen assembly comprises a supporting ring, a vibrating screen frame, an elastic connecting piece and an impurity removing driving piece. The supporting ring and the machine body are coaxially fixed. The elastic connecting piece comprises a guide sliding rod and a compression spring. A guide sliding groove is formed in the top wall of the supporting ring, the compression spring is arranged on the guide sliding rod in a sleeving mode, the impurity removal driving piece comprises a driving motor, a rotating shaft, an auxiliary supporting ring, a plurality of sweeping brush plates and a plurality of auxiliary supporting rods, and the driving motor is installed on the machine body; one end of the auxiliary supporting rod is fixedly connected with the rotating shaft, and the other end of the auxiliary supporting rod slides along the corrugated ring groove; and through the screening and impurity removing mechanism, vibration screening is conveniently conducted on the to-be-screened rape seeds, meanwhile, the inner side wall of the machine body is conveniently cleaned, and the screening quality of the rape seeds is improved.

The present invention belongs to the technical field of oil and gas resource exploitation, and discloses a gas-liquid cyclone separation device, which comprises a gas-liquid cyclone tube. A spiral guide plate is arranged inside the gas-liquid cyclone tube and is uniformly distributed in a circumferentially spiral downward manner along the inner wall thereof. A gas escape tube is arranged inside the gas-liquid cyclone tube, and a long slot is arranged on the gas escape tube; the end of the gas collecting pipe is inserted into the gas escape tube; the liquid collecting and sewage discharging pipe is connected to the lower part of the gas-liquid cyclone tube. A fixed disk is arranged at the upper end of the liquid collecting and sewage discharging pipe. The lower end of the gas escape tube passes through the fixed disk and is communicated with the liquid collecting and sewage discharging pipe. Liquid removal holes are arranged on the fixed disk, and a miscellaneous discharging pipe communicated with the outside is arranged at the bottom of the liquid collecting and sewage discharging pipe. The combination of the gas escape tube and the spiral guide plate is adopted, and centrifugal separation and gravity separation are comprehensively utilized to improve the separation efficiency.

The invention provides a method and a system for recovering ferrochrome in ferrochrome slag based on particle size separation, and relates to the technical field of metal mineral treatment. The method comprises the following steps: crushing the ferrochrome slag until the particle size is less than or equal to 15mm; the crushed ferrochrome slag is screened into materials with three particle sizes of-15 + 6 mm,-6 + 1 mm and-1 mm; respectively carrying out magnetic separation on the materials of the first particle size fraction and the second particle size fraction to obtain a first magnetic product, a second magnetic product and a non-magnetic product; the materials of the third particle size fraction are ground to the preset fineness, and ground materials are obtained; the ore grinding materials are subjected to gravity separation, and gravity separation products and tailings are obtained; the first magnetic product, the second magnetic product and the reselection product are recycled ferrochrome. Through the combination of crushing, screening, magnetic separation, grinding and reselection processes, high-efficiency recovery of ferrochrome alloy with different particle sizes in ferrochrome slag is realized, the recovery rate of ferrochrome alloy is improved, and good economic benefits and environmental benefits are achieved.

The present invention relates to the technical field of desulfurization of coal gangue, specifically a high-sulfur coal gangue separation and desulfurization device and process; the steps of the process are as follows: S1: Screen and crush the high-sulfur coal gangue to less than 30 mm to effectively separate the pyrite and gangue in the coal gangue; S2: Feed the crushed high-sulfur coal gangue below 30 mm into the separation and desulfurization device for separation treatment. Due to different specific gravities, it is separated into primary pyrite, pure gangue, medium coal, and power coal by jigging gravity separation; the medium coal is washed again; the process provided by the present invention obtains primary pyrite, pure gangue, and power coal through preliminary crushing and separation of high-sulfur coal gangue; then the primary pyrite is crushed and separated again to obtain pyrite and gangue; the pyrite is directly sold, the pure gangue is backfilled for land reclamation, and the power coal is directly sold; in this way, the process thoroughly treats the high-sulfur coal gangue, and all classified materials can be comprehensively utilized.

The present invention belongs to the technical field of phosphate ore beneficiation and relates to a large-scale process method for a siliceous-calcareous phosphate ore spiral chute. Specifically, it includes: (1) Raw ore desliming: The raw ore is deslimed, and the deslimed raw ore enters the next step; (2) Classification and gravity separation: The deslimed raw ore is classified into several relatively narrower particle sizes according to certain conditions, and the products of each particle size are respectively subjected to gravity separation using a chute (with a diameter greater than 1200 mm). The concentrates and tailings after gravity separation of the products of each particle size are respectively combined into gravity separation concentrates and gravity separation tailings; (3) Flotation of gravity separation products. The present invention adds desliming and classification and gravity separation operations, which can effectively reduce the problem of entrainment of fine particle sizes in each strip in the chute (with a diameter greater than 1200 mm) and the problem of poor separation accuracy of the chute (with a diameter greater than 1200 mm) caused by equal-settling particles, improve the grade difference between the concentrates and tailings separated by the chute (with a diameter greater than 1200 mm), enhance the adaptability of the reagents in the subsequent flotation process, and improve the fluidity of the flotation foam.

The invention belongs to the technical field of ore selection and washing, and discloses a hyperboloid composite motion leucite-type rutile associated omphacite gravity concentration table which comprises a table, a transmission mechanism located on one side of the table and a machine base located below the table, and further comprises a shifting mechanism and a control mechanism, the shifting mechanism comprises a driving assembly, the output end of the driving assembly is sequentially connected with a plurality of round rods, and the round rods are connected with the transmission mechanism; a rotating plate is arranged on the side, close to the ore feeding groove, of the round rod and used for stirring an ore mixture flowing out of the ore feeding groove. The brushing mechanism comprises a brush, the brush is arranged on the outer side of the round rod in a multi-degree-of-freedom sliding and sleeving mode, a clamping assembly is arranged at the abutting position of the brush and the round rod, and the brush can be accurately positioned to any position on the round rod by means of the clamping assembly and can be adjusted to any angle. The problems that when existing equipment is used for washing, energy consumption is high, and efficiency is low are solved.

The application discloses a multi-metallic sand tin ore beneficiation process, adopts the equal floatation-mixed floatation-gravity separation backwater process, lead concentrate yield is 0.39%, lead grade is 16.62%, recovery rate is 15.93%; zinc concentrate yield is 1.08%, zinc grade is 39.32%, zinc recovery rate is 46.92%, the gravity separation indexes are as follows: tin concentrate yield is 0.39%, tin content is 40.57%, tin recovery rate is 51.66%; low-grade tin concentrate yield is 0.51%, tin content is 3.17%, tin recovery rate is 5.28%. The beneficiation process recovers lead, zinc and tin in the sand tin ore, has high beneficiation indexes and good beneficiation effect.

The present disclosure is directed to a method for forming calcined pozzolan that includes: performing a gravity separation on coal refuse to separate an organic component from an inorganic component including crystalline shale; and converting the crystalline shale to a calcined pozzolan. The present disclosure also directed to a calcined pozzolan, concrete, a method of producing concrete, and a method for cleaning a landfill site.

The present invention relates to the field of coal gangue processing technology, and in particular to a system and method for sorting clean coal and pyrite in coal gangue, comprising a pretreatment mechanism, a screening mechanism, a sample analysis mechanism, and an intelligent sorting mechanism, wherein the intelligent sorting mechanism comprises a frame body, a first sorting section, a second sorting section, and an execution controller, wherein the first sorting section and the second sorting section are sequentially arranged on the frame body from top to bottom, and the execution controller is used to control the first sorting section and the second sorting section to sort the ore; the pretreatment mechanism, the screening mechanism, and the intelligent sorting mechanism are sequentially connected, and the sample analysis mechanism is communicatively connected to the execution controller. The sorting system first screens and grades the coal gangue according to the presence form of pyrite in the coal gangue, and then intelligently sorts the graded coal gangue, effectively solving the problems of low grade, low sorting efficiency, and difficulty in large-scale production in the process of directly selecting coal and pyrite in coal gangue mainly by gravity separation and flotation.

The invention relates to the technical field of ore separation, and discloses a multi-stage photoelectric-jigging-magnetic separation synergistic efficient ore separation process which comprises the following steps: A, material pretreatment and particle size regulation and control: raw ore raw materials are treated through crushing and screening equipment; the method comprises the following steps of: adding the raw materials into a magnetic separator to obtain a coarse-fraction product with the particle size range of 5-100mm and a fine-fraction product with the particle size range of 0.5-5mm, and cleaning and drying the products to remove surface dust and pollutants. Sequential and parallel recognition and sorting of multi-dimensional physical attributes such as color (photoelectricity), density (jigging) and magnetism (magnetic separation) of ore particles are achieved, the function limitation of a single sorting method is overcome through the multi-technology coupling mechanism, and a large amount of waste rock is efficiently thrown at the front end through photoelectric pre-sorting; the enriched valuable minerals can be intensively treated by subsequent gravity separation and magnetic separation equipment, and the unit operation efficiency is improved.

The invention relates to the technical field of image processing and intelligent identification, and discloses an image segmentation method for identifying a mineral boundary in a table ore zone. The method comprises the steps of constructing a multi-branch single-output enhancement unit based on gating enhancement and multi-head attention combined dynamic fusion, constructing a multi-scale fusion module of a split-level fusion pyramid structure based on multi-head attention and residual fusion, constructing a trunk module based on convolutional layer and enhancement unit stacking, and constructing a multi-scale fusion module of a split-level fusion pyramid structure based on multi-head attention and residual fusion. Constructing an image recognition segmentation model by combining step-by-step down-sampling, a multi-scale fusion module and a prediction head; and obtaining an ore zone image of a shaking table operation site of the reselection workshop, inputting the ore zone image into the image recognition segmentation model to obtain a recognition result, and completing shaking table separation of the mineral particles based on the recognition result. The problem of insufficient segmentation precision caused by particle size difference, illumination interference, fuzzy boundary and real-time requirement in the existing industrial mineral separation process is solved.

The invention belongs to the field of sludge treatment, and provides a method for realizing copper enrichment and recovery by adding an auxiliary agent in a flameless combustion process of copper-containing sludge. According to the method, enrichment and recovery of copper are realized by combining preparation of a multifunctional additive with staged heating and subsequent separation processes, an additive A provides reducibility by using a nitrogen-containing carbon material generated by pyrolysis of chitosan, and an iron oxide catalyzes reduction of a copper compound; the auxiliary agent B regulates and controls the redox reaction through the oxygen vacancy of CeO2, and ZrO2 provides mechanical support; the auxiliary C promotes copper compound migration through a low-melting-point eutectic salt system, impurity oxides are removed at the same time, copper compound decomposition, migration and reduction are sequentially completed through staged heating, copper-rich slag is finally formed, iron impurities are removed through follow-up strong magnetic separation, copper alloy is enriched through reselection, copper-containing leachate is generated through acid leaching, copper ions are selectively extracted through an extracting agent, and the copper-rich slag is obtained. And finally, recycling of high-purity copper is achieved.

The present invention relates to the technical field of river and lake sediment treatment, and discloses a spiral propulsion type underwater elution robot for river and lake sediment, including a spiral propulsion power system for precise steering and movement in underwater soft foundation silt. The spiral propeller has the advantages of strong terrain adaptability, large traveling driving force, precise direction control, etc.; the sediment elution robot can achieve the suction separation of fine particulate matter and the in-situ covering of large inorganic sediment particles on the bottom of rivers and lakes through gravity separation in the sediment elution chamber and regulation of the water outlet flow rate, improving the sufficiency of sediment particle coverage at the mud-water interface. Using the underwater elution robot to carry out river and lake sediment treatment has the advantages of less sludge generation, high pollutant separation rate, low treatment cost, etc. After dehydration, the eluted silt can be used for the ecological resource utilization of sediment. The present invention is applicable to the in-situ treatment of sediment in urban rivers, lakes and reservoirs and the restoration of submerged plant habitats.

The invention discloses a cassiterite reselection-multi-gradient flotation combined enhanced recovery method. The method comprises the following steps that cassiterite raw ore is crushed and then subjected to pre-desliming and wet ball milling; carrying out magnetic separation on the obtained ore grinding product; performing primary table separation on the non-magnetic product to obtain table concentrate 1 and table middling 1; carrying out secondary table separation on the obtained table middling 1 to obtain table concentrate 2 and table middling 2; the table concentrate 1 and the table concentrate 2 are combined to serve as final table concentrate; the obtained table middling 2 is reground, then one-time roughing, two-time concentration and two-time scavenging are carried out, and flotation concentrate 1 is obtained; the obtained mud table tailings 2 are combined and then subjected to one-time roughing, three-time concentration and two-time scavenging, and flotation concentrate 2 is obtained; and the flotation concentrate 1 and the flotation concentrate 2 are combined to serve as final flotation concentrate. According to the method, the cassiterite is separated through combination of gravity separation, classification and flotation, the high-grade tin concentrate is obtained through gravity separation of the table concentrator, then the low-grade tin concentrate is obtained through separation by adopting different flotation processes and reagent systems after middlings of different size fractions are classified, and the comprehensive recovery rate of raw ore is increased.

The invention relates to the technical field of bauxite resource treatment, in particular to a beneficiation and desilicication method for low-grade bauxite. The aluminum-silicon ratio of the low-grade bauxite is 2.0-2.5, the low-grade bauxite comprises useful minerals and gangue minerals, and the beneficiation and desilicication method comprises the following steps: crushing the low-grade bauxite to obtain bauxite particles; the bauxite particles are subjected to rod milling and grading, and a first-size-fraction material, a second-size-fraction material and a third-size-fraction material are obtained; the first fraction material is subjected to dense medium cyclone separation, and gravity concentrate and gravity tailings are obtained; sorting the second fraction material by a first spiral chute to obtain first concentrate and first tailings; the third-fraction material is separated through a second spiral chute, and second concentrate and second tailings are obtained; the gravity concentrate, the first concentrate and the second concentrate are combined, and aluminum concentrate is obtained; and the gravity separation tailings, the first tailings and the second tailings are combined, and tailings are obtained. According to the beneficiation and desilicication method, efficient separation of aluminum minerals and siliceous gangue is achieved through collaborative innovation of multiple stages of processes.

The invention discloses a method for analyzing the gold occurrence state of a dump leaching sample, and relates to the technical field of mineral processing and process mineralogy analysis. According to the analysis method, through the steps of sample preparation, gold grade calculation and representativeness verification, size grading and enrichment, stepped chemical leaching diagnosis, roasting dissociation and secondary leaching diagnosis, reselection enrichment and precise analysis, occurrence state calculation and the like, the means of reselection, leaching, roasting and the like are systematically combined with a mass balance mathematical model; accurate quantitative analysis of four critical occurrence states of coarse grain gold, leachable gold, wrapped gold and adsorbed gold in the heap leaching process is realized initiatively. The industrial problem that different occurrence states cannot be accurately quantified through a traditional method is solved, and direct and reliable data support is provided for accurate optimization and recovery rate improvement of the dump leaching process.

Aiming at the problem of low resource utilization value of the existing copper slag, the invention discloses a method for resourceful treatment of the copper slag, through a pyrogenic process and wet process mineral separation coupling method of high-temperature reduction, selective corrosion, magnetic-gravity combined separation and selective leaching, the transformation form and trend of key elements are accurately regulated and controlled, and the utilization rate of the copper slag is improved. The purposes of extracting lead, zinc, iron, copper and silicon elements in the copper slag step by step and converting the elements into corresponding high-value products are achieved. In addition, through process optimization and improvement, a low-temperature reaction system and a reagent cyclic regeneration mechanism are adopted, energy and chemical consumption is effectively reduced, generation of secondary hazardous waste is basically eradicated, and a new solution path is provided for green, high-value and efficient utilization of metallurgical solid waste.

The application discloses a beneficiation method for comprehensively recovering niobium, rare earth and pyrite from low-grade niobium ore, and comprises the following steps: (1) grinding: grinding the niobium ore after crushing to a fineness of 85% to 87% of 0.038 mm, and then adjusting the ore pulp concentration to 25% to 30%; (2) pre-concentration by strong magnetic separation; (3) re-concentration of the rough magnetic separation concentrate by gravity separation; (4) re-separation of the middling concentrate; and (5) flotation separation of the gravity separation concentrate: combining the gravity separation concentrate 1 in the step (3) and the gravity separation concentrate 2 in the step (4) to obtain a gravity separation concentrate, wherein the gravity separation concentrate is a mixed concentrate rich in niobite, rare earth and pyrite; and after the gravity separation concentrate is adjusted into an ore pulp with a concentration of 25% to 35%, the ore pulp is subjected to flotation separation. The application is aimed at the multi-metal low-grade niobium ore with niobite, rare earth and pyrite being associated, realizes efficient separation among the niobium ore, the rare earth ore, the pyrite ore and the gangue ore, and achieves the purpose of comprehensively recovering the niobite, the rare earth and the pyrite.

The invention discloses a beneficiation method for recovering micro-fine particle cassiterite and fluorite from cassiterite tailings, and belongs to the technical field of beneficiation. The method comprises the steps that cassiterite tailings are subjected to reselection, obtained reselected bulk concentrate is subjected to ore grinding and then sequentially subjected to magnetic separation iron removal and flotation desulfurization, and the desulfurized tailings are subjected to cassiterite flotation with metal ion modified water glass with the valence higher than bivalent as an inhibitor and a metal-based multi-ligand organic complex as a collecting agent, so that cassiterite concentrate and flotation tailings are obtained; and the flotation tailings and the gravity separation tailings are combined, water glass or acidified water glass serves as an inhibitor, aliphatic carboxylic acid and heavy alkyl benzene sulfonate serve as a composite collecting agent, fluorite flotation is conducted, and fluorite concentrate is obtained. According to the method, the technological process is simple, the ore grinding and agent cost can be remarkably reduced, and selective separation of cassiterite and fluorite is achieved while efficient recycling of micro-fine particle cassiterite is achieved.