279 results about "Pyrite" patented technology

The invention discloses an experimental device and method for controlling migration and mineralization of ore-forming fluid in a wrinkle deformation process, and belongs to the technical field of ore deposit geology. The device comprises an ore liquid synthesis unit and a mechanical deformation simulation and mineralization analysis unit. The mechanical deformation simulation unit comprises a box body, an extrusion deformation system, a liquid injection system and a heating temperature control system, and can synchronously realize visual analysis of structure extrusion, fluid injection and mineralization precipitation at high temperature. The experimental method comprises the following steps: firstly, preparing a simulated metallogenic fluid containing FeS2 (pyrite); laying simulated surrounding rock and wrinkles in the box body, arranging a separation layer, and heating; extruding the sand layer and injecting fluid to simulate a mineralization process; and slicing, sampling and analyzing after model consolidation, and establishing a mineralization space distribution model. The device is simple in structure and convenient to operate, the whole process of fold extrusion, crack extension, fluid migration and mineral precipitation can be repeatedly represented, and an experimental basis is provided for hydrothermal deposit mineralization mechanism research and prospecting prediction.

The invention discloses a tetracycline hydrochloride-containing wastewater treatment method in the field of wastewater treatment, which comprises the following steps: introducing tetracycline hydrochloride-containing wastewater into a reactor, adding a multilevel structure iron and iron sulfide composite carbon material, and adjusting the system to a nearly neutral condition; then adding potassium peroxymonosulfate composite salt, starting a direct current system, and carrying out catalytic degradation reaction under specific current density; and finally recovering the catalyst through magnetic field separation. The preparation method comprises the following steps: grinding pyrite and hematite, ball-milling and mixing the ground pyrite and hematite with orange peel powder and sodium hydroxide, and carrying out microwave pyrolysis, acid washing and drying, hydrogen peroxide surface treatment and the like to obtain a final product. According to the method, efficient degradation of tetracycline hydrochloride under the neutral condition is achieved, the catalyst can be magnetically recycled, secondary pollution is avoided, and the method has the advantages of being low in cost, easy and convenient to operate, environmentally friendly and the like.

The invention relates to the technical field of material detection and analysis, and discloses a pyrite classification test method, which comprises the following steps: crushing and grinding a to-be-detected sample to prepare a standard detection sample; performing parameter detection on the standard detection sample to obtain spectrum time sequence data, component analysis data and microscopic image data; extracting spectral dynamic characteristics from the spectral time sequence data, extracting component composition characteristics from the component analysis data, extracting microscopic morphological characteristics from the microscopic image data, and then generating a phase determination index and a core characteristic subset; determining a phase classification result through a tree classification decision model according to the core feature subset; and generating a confidence label of a phase classification result according to the phase judgment index, and performing parameter detection on the standard detection sample again when the phase judgment index is lower than a preset threshold value. And the pyrite classification efficiency and accuracy are improved.

The application discloses a kind of synchronous denitrification and phosphorus removal light materials and its preparation and application method, belong to environmental functional materials and sewage treatment technical field.The application is obtained by fully melting and dispersing sulfur and iron-based component, and the iron-based component is a mixture of pyrite and calcium-magnesium carbonate.The molten mixture is foamed to form a synchronous denitrification and phosphorus removal light material.The synchronous denitrification and phosphorus removal light material has high porosity, large specific surface area, light weight and high reactivity.The light material is used as a microbial carrier and an electron donor for biochemical reactions, and is applied to fixed bed, fluidized bed and other reactors for sewage treatment.The light material has good microbial adhesion performance, high denitrification rate and good phosphorus removal effect.

The invention belongs to the technical field of comprehensive utilization of metallurgical and chemical resources, and discloses a method for improving the productivity of magnet powder and sulfuric acid by adding pyrite in copper smelting. According to the method, a heat release rate, SO2 generation kinetics and an iron oxide phase change path are synergistically optimized by constructing a gradient blending mechanism of pyrite and an in-furnace oxygen potential directional oxidation regulation and control system. The method is characterized in that on the basis of real-time feedback of the molten pool temperature, the flue gas SO2 concentration and the slag phase FeO activity, the pyrite blending rate, the granularity and the carrier gas oxygen concentration are dynamically regulated and controlled in a staged mode; a reduction microenvironment in which logpO2 is approximately equal to-11 is created on a slag-sulfonium interface, and growth of Fe3O4 crystal nucleus is promoted; and the flue gas cooling and acid-making gas inlet stability is optimized. According to the method, the capacity of the magnet powder and the capacity of the sulfuric acid are synchronously improved, the stability and the high efficiency of the copper smelting main process are guaranteed, and an engineering-oriented technical path is provided for comprehensive utilization of resources of copper smelting enterprises.

The invention discloses a collaborative recovery device and method for pulverized coal, pyrite and tailings in high-sulfur coal gangue, and belongs to the technical field of solid waste resource utilization. The device comprises a flotation box body, a coal gangue slurry input mechanism, an aeration mechanism, a pulverized coal collecting hopper, a tailing collecting hopper and a pyrite collecting hopper, and a slurry output port of the coal gangue slurry input mechanism penetrates through the left side wall of the flotation box body and horizontally extends into the flotation box body; the aeration mechanism penetrates through the left side wall of the flotation box body and extends into the flotation box body, the pulverized coal collecting hopper is fixedly installed on the upper portion of the right side wall of the flotation box body, a pulverized coal discharging port communicated with the pulverized coal collecting hopper and the interior of the flotation box body is formed in the right side wall of the flotation box body, and the bottom edge of the pulverized coal discharging port is higher than the bottom face of the pulverized coal collecting hopper. According to the invention, the device and the method are matched, so that the pulverized coal, the pyrite and the tailings in the high-sulfur coal gangue are effectively and efficiently separated, the resource utilization rate of the high-sulfur coal gangue is enhanced, and the resource waste is reduced.

The application discloses a low-alkalinity inhibitor for pyrite in secondary copper-sulfur ore and a method. The method comprises the following steps: adding trisodium trithiocyanate in the process of ore grinding; and adding a second inhibitor to adjust the pH value of the ore slurry to 9.5-10.5 in the process of flotation. The second inhibitor is calcium oxide and an organic copolymer, the organic copolymer is an acrylamide-acrylic acid-maleic anhydride copolymer, and the molecular weight of the organic copolymer is 5000-10000. The method can reduce the activation of copper ions on pyrite, realize low-alkalinity inhibition of pyrite, and avoid problems such as high pH value of mineral processing waste water, easy pipe blockage, and low recovery rate of precious metals.

The invention relates to the field of metallurgical solid waste resource utilization, and particularly provides a method for recycling valuable metals in tungsten smelting slag. The method comprises the following steps: (1) mixing tungsten smelting slag containing W, Ni, Co and optional Cu, molybdenum smelting slag containing Mo and Cu, a carbonaceous reducing agent and pyrite to obtain a mixture; and (2) the mixture is subjected to reduction vulcanization smelting, a smelting product comprising an alloy phase, a sulfonium phase and a slag phase is obtained, W, Mo, Co and Ni are enriched in the alloy phase, and Cu is enriched in the sulfonium phase. According to the method, the smelting temperature can be reduced, valuable metal can be efficiently recycled, additional fluxing agents do not need to be added, the distribution state of the metal can be optimized, and then the recycling cost is reduced.

This invention relates to a method for the recovery of metal from a material comprising: contacting a material with a first reagent comprising a thiocarbonyl group and a second reagent under various conditions. The metal may be a base metal, a precious metal, or a combination thereof. The conditions include, but are not limited to, recovery in the presence of a microbe; optimal material size and / or shape; geolocation parameters; elemental sulfur; added pyrite; or a combination thereof.

The invention relates to a method for regulating and deacidifying in a bioleaching process of low-grade copper sulphide ore, aiming at the problem of excessive acid caused by excessive oxidation of pyrite in a dump leaching system, a thiocyanate bactericide is added into the bioleaching system of the low-grade copper sulphide ore, and the thiocyanate bactericide is dissolved in a spray liquid of the bioleaching system, and is added into the spray liquid of the bioleaching system; under the catalytic action of mineral leaching microorganisms, oxidation of ferrous ions is enhanced, so that the oxidation-reduction potential of a solution is increased, oxidation of pyrite is intensified, acid accumulation is excessive, the thiocyanate bactericide can remarkably inhibit the activity of part of sulfur-oxidizing bacteria and even kill part of sulfur-oxidizing bacteria, and therefore the activity of ferrous oxide is reduced; compared with the prior art, the method has the advantages that the sulfur oxidation activity of microorganisms is greatly influenced, but the oxidation influence on iron is relatively small, so that the acid leaching is reduced under the condition that the copper leaching of the copper sulfide ore is not influenced, the copper leaching is not influenced, the acid leaching is reduced, the production cost is reduced, the environmental influence is reduced, and the like.

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 present invention belongs to the field of wastewater denitrification and phosphorus removal, and specifically relates to a novel magnetic pyrite filler and its application in wastewater denitrification and phosphorus removal. The invention comprises the following components by weight: 15-25 parts of pyrite powder, 12-15 parts of modified powder, 1-3 parts of calcium sulfide, 5-8 parts of sodium lignin sulfonate, 100-120 parts of deionized water, and 150-200 parts of mixed bacterial solution. The invention comprises the following steps: mixing the pyrite powder with the modified powder and calcium sulfide, stirring, adding sodium lignin sulfonate and deionized water, stirring, granulating, drying, heating to 350-400°C, and keeping warm for 1-3 hours to obtain a mixed filler; immersing the mixed filler in the mixed bacterial solution, oscillating and culturing, filtering, and drying to obtain a novel magnetic pyrite filler; the obtained novel magnetic pyrite filler has both excellent mechanical stability and efficient nitrogen and phosphorus removal efficiency, and achieves efficient removal of nitrogen and phosphorus pollutants in wastewater through the synergistic effect of physical adsorption and biodegradation.

The invention discloses a preparation method of a standardized sheet for a thermoelectric test of minerals or mineral materials and alloys, belongs to the technical field of mineralogy, material science and prospecting prediction, and establishes a preparation process of a universal mineral or mineral material and alloy thermoelectric sheet. Covering all semiconductor mineral types or mineral material types such as pyrite, magnetite, graphite and sintered ore; accurate thickness control is achieved through a double-face polishing-loading sheet supporting structure, in-situ testing of the thermoelectricity of minerals or mineral materials and alloys is achieved, and the testing precision is improved; by adopting a conductive adhesive-copper plate composite structure, the interface resistance is reduced, the supporting strength is met, and the requirement of eliminating detection interference is met; residual colloid is thoroughly removed through ultrasonic cleaning, and the insulation effect is avoided; according to the standardized sheet, the hollow aminated phenolic resin nanosphere is used as a conductive substrate and is used for bonding a sample and a copper plate, the contact resistance between the sample and an electrode can be greatly reduced, and the accuracy of test data is improved.

A system for dynamic oxidation of a heap of copper ore includes a “process island” for formulating and dispensing oxidizing reactive mixtures having predetermined compositions, and irrigating the heap with the mixtures to progressively transform the ore and maintain conditions for enhanced recovery of metal by heap leaching, solvent-extraction and electrowinning. In embodiments, the system is adapted to obtain copper metal from the refractory copper mineral chalcopyrite.

The invention relates to an inhibitor for efficiently separating copper and sulfur under a low-alkalinity condition, a flotation reagent and a flotation method. The inhibitor is a compound as shown in a formula I (formula I), wherein R1, R2, R3 and R4 are respectively and independently selected from one of-R5X,-X,-H and-N + R6, R5 is alkyl of C1-C10, naphthenic base of C3-C10 or heterocyclic group of C3-C10, and the ring of the heterocyclic group is provided with or not provided with a substituent group; x is one of F, Cl, Br, I, tertiary amine positive ions, nitro, cyano, sulfo, formyl, acyl and carboxyl; r6 is a C1-C5 alkyl group or a C3-C5 cycloalkyl group; the inhibitor is low in viscosity and good in fluidity, pyrite and chalcopyrite in complex copper sulfide ore copper-sulfur ore can be effectively separated under the low-alkalinity condition, and the separation effect is remarkable.

The invention discloses a preparation method of FePS3, which comprises the following steps: mechanically mixing pyrite powder, sulfur-containing small molecules and elemental phosphorus, calcining the fully mixed powder in two temperature stages under a protective atmosphere, and cooling to obtain FePS3 nano-powder; wherein in the first temperature stage, the temperature is 200-300 DEG C, and the heat preservation time is 120-240 minutes, and in the second temperature stage, the temperature is 400-600 DEG C, and the heat preservation time is 120-180 minutes; the sulfur-containing small molecules are thiourea, thioacetamide or a mixture of the thiourea and the thioacetamide; the molar ratio of sulfur atoms to phosphorus atoms in FeS2 molecules and sulfur-containing small molecules in the pyrite powder is (1: 3: 5)-(1: 1: 5). According to the method, pyrite is used as an iron source and a sulfur source, sulfur-containing small molecules are used as a second sulfur source, and the FePS3 nano-powder is directly obtained through solid-phase reaction with the simple substance phosphorus without additional purification treatment. The method is low in solid-phase reaction temperature and simple in process, does not need harsh reaction conditions, and is easy for large-scale production.

The application discloses a gold leaching method for pyrite-containing gold ore, and comprises the following steps: after the pyrite-containing gold ore is finely ground, water is added to obtain a slurry; a gold leaching reagent solution is added into the slurry to obtain a mixed leaching solution; the pH value of the mixed leaching solution is adjusted to alkaline, and leaching treatment is performed; and after filtration, a gold-containing leaching solution is obtained; the gold leaching reagent solution comprises polyphosphate, copper salt and thiosulfate; in the gold leaching reagent, polyphosphate is added; under alkaline conditions, polyphosphate ions can be selectively adsorbed or complexed on the surface active sites of pyrite to form a physical or chemical masking layer, thereby effectively blocking the direct contact of pyrite with dissolved oxygen and thiosulfate in the solution, inhibiting the catalytic decomposition of pyrite, significantly reducing the invalid consumption of thiosulfate, stabilizing the pH value and potential of the leaching system, and guaranteeing the efficient leaching of gold.

The invention relates to a composite material for strengthening pyrite passivation by using Cu < 2 + > and a preparation method, and the material is prepared by compounding layered double hydroxide and fulvic acid through a coprecipitation method. The LDHs-FA composite material is applied to surface passivation of the pyrite for the first time, inherent Cu < 2 + > in acid mine wastewater is adsorbed, meanwhile, compactness and stability of a passivation layer on the surface of the pyrite are synergistically enhanced, and waste is treated with waste; physical barrier, chemical inhibition, heavy metal adsorption and fixation and pH responsive self-repairing are integrated, and integration from passive treatment to active prevention and control and self-repairing is achieved; the preparation method is simple, environment-friendly in raw material, low in cost and suitable for large-scale production and application; after LDHs-FA and Cu < 2 + > are cooperated for treatment, the passivation efficiency is improved to 91.19% from 68.93%, the efficiency amplification reaches 32.29%, and an efficient and intelligent new way is provided for mine environment pollution source treatment and heavy metal resource control.

The invention relates to a silica ore dressing method which comprises the following steps: step 1, crushing raw ore of silica ore, step 2, grinding the crushed silica ore by adopting a ball mill, step 3, carrying out graded desliming treatment on the ground silica ore by using a hydrocyclone, step 4, carrying out weak magnetic separation on the deslimed silica ore, and step 5, carrying out magnetic separation on the deslimed silica ore. And 5, the non-magnetic material subjected to weak magnetic separation is subjected to strong magnetic separation, and silica concentrate is obtained. Before the ore is subjected to strong magnetic separation, strong magnetic minerals are removed through weak magnetic pre-separation, the strong magnetic separator is effectively prevented from being blocked, the operation stability and the production continuity of equipment are improved, various magnetic impurity minerals including intergrowth particles can be removed to the maximum extent through the whole technological process, and the production efficiency is improved. Such as hematite, limonite, biotite, ilmenite, pyrite and garnet.

The application provides a kind of porous material, its preparation method and its application, the raw material of the porous material includes the following weight parts of components: engineering spoil: 25-40 parts;Pyrite powder: 25-40 parts;Silica fume: 10-15 parts;Boric acid and / or its salt: 10-15 parts;And carbonate and / or bicarbonate: 5-10 parts.In the application, engineering spoil, pyrite, silica fume derived from industrial or construction waste are used for sintering, which increases the way of waste resource utilization, reduces the damage of the above waste to the environment, and protects the environment;Boric acid substances reduce the sintering temperature of traditional porous materials, save energy and reduce consumption;Carbonate or bicarbonate is used for foaming to increase the specific surface area of the material and enhance the adsorption property;The raw material components are scientifically compounded and reasonably proportioned, the phosphorus removal rate can reach more than 80% when rainwater is treated by the application, and the price is low due to the wide sources of each component, thereby effectively reducing the preparation cost.

The utility model relates to a pyrite acid-making drying tower, and belongs to the field of drying towers, the pyrite acid-making drying tower comprises a tower body, a plurality of inclined plates are arranged in the tower body, the sides, away from the inner wall of the tower body, of the inclined plates incline downwards, a plurality of acid inlet pipes are arranged in the tower body, and a plurality of acid spraying pipes are connected to the acid inlet pipes. The multiple inclined plates divide the tower body into the multiple cavities, the staying time of sulfur-containing furnace gas in the tower is prolonged, and the multiple acid inlet pipes and the multiple acid spraying pipes are arranged, so that the spraying uniformity degree is improved.

The present application relates to the technical field of mineral processing and metallurgy, and particularly relates to a processing technology for full combustion of sulfur ore in a fluidized bed furnace, which comprises the following steps: after the pyrite is crushed, the pyrite is screened and then compounded, and then the pyrite is floated with a high-efficiency inhibitor to obtain pretreated pyrite powder; the pretreated pyrite powder is then added into the fluidized bed furnace, is leveled and then is fully combusted to obtain furnace gas and furnace slag; the high-efficiency inhibitor is obtained by mixing sodium hyposulfite, sodium mercaptoacetate, sodium humate and a buffer; wherein the furnace temperature during the full combustion is 910-930 DEG C, the combustion duration is 4-5 h, and the oxygen concentration at the outlet of the fluidized bed furnace is 2.5%-3.0%. The specific particle size and high-quality combination roasting process of the pretreated pyrite powder make the present application have higher burning-out rate, higher iron grade of the furnace slag and longer service life of the circulating pump compared with the prior art, and the application prospect is also wider.

The invention provides a flotation method for fine-fraction gold-loaded pyrite, and relates to the technical field of flotation separation. Specifically, an artificial microsphere material is subjected to grafting modification treatment, and then a collecting type microsphere material and an adjusting type microsphere material are obtained through surface modification treatment; preparing ore pulp containing fine-fraction gold-bearing pyrite, and carrying out flotation treatment through a flotation reagent and a flotation process to obtain gold-bearing concentrate; wherein the flotation reagent comprises a collecting agent, the collecting type microsphere material and the adjusting type microsphere material, and the flotation process comprises three times of roughing, one time of concentration and two times of scavenging. According to the method, efficient recovery of fine-fraction gold-loaded pyrite is taken as a target, flotation operation is performed by preparing two specific microsphere materials, and the gold recovery rate is larger than 80%; the method provided by the invention has the advantages of high efficiency, low energy consumption, easy bubble recovery, environmental protection and the like, and the whole process is simple.

The application discloses a preparation method of a pyrite flotation inhibitor and application thereof, and belongs to the technical field of flotation inhibitors. A certain amount of fly ash and modified reagents are weighed and mixed, and then are placed in a grinding device for sufficient grinding. After grinding, the mixture is cooled to room temperature to obtain the pyrite flotation inhibitor. The preparation method of the pyrite flotation inhibitor and application thereof provided by the application innovatively modifies solid waste fly ash into a pyrite inhibitor. The modified fly ash can not only be adsorbed on the surface of pyrite under low-alkali conditions to prevent the adsorption of a collector, but also can be complexed with difficult-to-avoid metal ions (Cu 2+ , Pb 2+ , Zn 2+ , etc.) in ore pulp to shield the activation effect of the difficult-to-avoid ions on pyrite, and further reduce the floatability of pyrite.

The invention discloses an iron-sulfur-carbon-based composite filler for removing florfenicol in tail water, and belongs to the technical field of water treatment materials. The composite filler is composed of charcoal, pyrite, a calcium base, a binder and zeolite in proportion, through the synergistic effect of all the components, an adsorption-reduction-degradation combined mechanism is achieved, and florfenicol in municipal tail water and aquaculture tail water is efficiently removed. The preparation method comprises the steps of ingredient mixing, roller granulation, maintenance forming and the like, is simple in process and low in cost, and can be used for recycling preparation of agricultural and mine wastes. The filler is suitable for constructed wetlands and other water treatment scenes, the removal rate of florfenicol reaches 80% or above, meanwhile, the filler has the removal effect on nitrate nitrogen and other pollutants, and wide application prospects are achieved.

The invention discloses an automatic activator selection device and method based on the surface oxidation state of pyrite, and the method comprises the steps: carrying out the online detection of the spectrums of Fe, S and O elements on the surface of pyrite in ore pulp through laser-induced breakdown spectroscopy, constructing comprehensive oxidation criterion parameters according to the spectrums, and judging the oxidation grade of the parameters; then making a decision in real time and precisely adding a matched copper ion or lead ion activating agent; quantitative recognition of the mineral surface state and automatic control of activating agent adding are combined, so that objectification and precision of activating agent selection are achieved, agent waste caused by erroneous judgment of artificial experience is effectively avoided, the quick response capacity to ore property fluctuation is greatly improved, and the method is suitable for industrial production. Therefore, the flotation index of the pyrite is stabilized and optimized.

A method for treating polluted acidic wastewater from smelting with an activated pyrite concentrate includes: drying and grinding a pyrite concentrate, and washing twice to produce a washed pyrite concentrate powder; mixing the washed pyrite concentrate powder with a Na2S powder to produce a mixed powder, and adding purified water; allowing a reaction for 3.5 h to 4.5 h; filtering to produce an activated pyrite concentrate; subjecting the activated pyrite concentrate to aeration and standing, drying, and grinding to produce an activated pyrite concentrate powder; adding a lime slurry to the wastewater to adjust a pH; adding the activated pyrite concentrate powder, and allowing an ultrasonic treatment, continuous stirring is conducted; allowing a settlement to produce a first supernatant; adding a lime slurry to the first supernatant to adjust a pH; further allowing a settlement to produce a second supernatant; and separating the second supernatant.

The invention discloses a method for comprehensively utilizing open-air copper-gold mine resources, which comprises the following steps of: crushing copper sulfide ore, grinding the crushed copper sulfide ore to a certain fineness, and respectively obtaining copper sulfide concentrate and pyrite concentrate by adopting a flotation process of copper-sulfur bulk flotation and reseparation; the method comprises the following steps: firstly, carrying out bacterial oxidation and leaching on the pyrite, and carrying out solid-liquid separation to respectively obtain the pyrite and a gold-containing leachate; and preparing sulfuric acid from the pyrite by adopting an oxidation method, and leaching the copper oxide ore in the waste rock heap by using the sulfuric acid so as to recover copper. The flotation, bacterial oxidation leaching and sulfuric acid leaching processes are adopted, waste is turned into wealth, and the recovery rate of copper and gold is comprehensively increased. The technology is green and environmentally friendly, the process is stable, and comprehensive utilization of copper and gold mine resources is achieved. According to the method, copper sulfide and pyrite are recycled from the flotation process of copper sulfide ore, gold is recycled from pyrite, sulfuric acid is prepared, copper oxide in a waste rock pile is leached through the prepared sulfuric acid so as to recycle copper, and the metal recovery rate of copper and gold is increased through resource cyclic utilization.

The application discloses a method for analyzing the existence form of As elements in pyrite based on a combination of multiple methods, which comprises the following steps: S1, selecting pyrite particles containing multiple ring zones as the object to be detected; S2, performing electron probe analysis to circumscribe the further analysis area; S3, judging the substitution property of As to Fe or S to preliminarily determine the existence form of As elements; S4, performing focused ion beam processing and spherical aberration transmission electron microscope analysis to shoot HAADF and ABF images; and S5, analyzing the spherical aberration transmission electron microscope images by using DigitalMicrograph data processing software to analyze the intensity difference of Z contrast microscopic images of different atomic sites and the abnormal atomic space occupation of heavy elements and light elements in the ABF images. The application is based on the combination of electron probe and spherical aberration transmission electron microscope, can finely analyze the existence form of As elements in pyrite from the micron to nanometer scale, and has high reliability and sufficient substantial evidence.