190 results about "Phosphorite" patented technology

The embodiment of the invention discloses a mineral resource exploration data analysis method and device based on three-dimensional space modeling. The method comprises the steps that back-flushing pushing-covering structure feature information is extracted through structure interface occurrence measurement, lithology combination analysis and structure movement trace recognition and converted into geologic structure feature parameters; stratigraphic age data and lithology distribution information are integrated, and a three-dimensional stratigraphic model is constructed with a stratigraphic superposition relation as a constraint; geophysical data are imported to extract geophysical response characteristics of stratums with different depths, and lithologic boundary correction is combined to obtain deep fracture characteristic parameters; sedimentary system division is carried out on lithofacies paleogeographic information, and deep fracture characteristic parameters are fused to establish a fracture system three-dimensional model; the multi-feature association relationship is identified, the ore body prediction model is established, the spatial data is input to obtain the three-dimensional visual prediction result of the hidden ore body spatial distribution, and the exploration efficiency and accuracy in the deep phosphorite exploration process are improved.

The invention relates to the technical field of mineral processing visual detection, and discloses a visual analysis system for detecting the grade of a phosphorite flotation froth layer. The system comprises an image acquisition and decomposition module, a parallel feature extraction module, a dynamic feature fusion module, a foam evolution analysis module and a grade decision output module. The system performs multi-scale decomposition on a foam image, extracts physical and semantic features in parallel, constructs a dynamic fusion network based on bidirectional mapping to perform iterative interaction, and generates a multi-modal feature descriptor. Therefore, self-organizing growth of a foam evolution graph is driven, an evolution track of a key foam primitive is positioned and tracked, a foam grade state vector is formed, and finally, a regulation and control decision is output in combination with external control parameters. According to the system, deep fusion of physical and semantic features and deep analysis of the foam dynamic evolution process are achieved, the accuracy and predictability of foam grade state sensing are improved, and an effective means is provided for accurate control over the flotation process.

The invention relates to the technical field of phosphoric acid production, in particular to an intelligent optimization management method for phosphoric acid production process parameters. Obtaining adaptive window ranges at different moments according to data change characteristics of the phosphoric acid concentration sequence; obtaining a phosphoric acid production benefit value according to the phosphoric acid concentration in the self-adaptive window range; obtaining a benefit reference value according to the phosphoric acid production benefit value in the historical batch production process; obtaining a benefit comparison value according to the phosphoric acid production benefit value at the current moment and a benefit reference value; judging whether the production process is adjusted according to the benefit contrast value; obtaining a parameter deviation coefficient according to the difference characteristic of the sulfuric acid concentration of the production process corresponding to the benefit reference value and the current production process; and according to the parameter deviation coefficient and the benefit contrast value, obtaining a phosphorite putting amount difference coefficient. According to the parameter deviation coefficient, the phosphorite feeding amount difference coefficient and the benefit contrast value, the sulfuric acid concentration or the phosphorite feeding amount at the current moment is iteratively adjusted, and the quality of the phosphoric acid production process is improved.

The invention discloses a ternary solid waste gelling system mine cemented filling material, a preparation method and application, phosphogypsum and water-quenched slag powder are used as main gelling components, carbide slag is used as an exciting agent, and phosphate tailings and phosphorus tail mud are used as filling body aggregate to form the high-content phosphogypsum ternary solid waste gelling system mine cemented filling material. Wherein the ternary solid waste gel system comprises the following components in percentage by weight: 10-18% of carbide slag, 36-54% of ardealite and 36-54% of water-quenched slag powder, and the ratio of ardealite / (ardealite + water-quenched slag powder) is 0.4-0.6. The mine cemented filling material disclosed by the invention is prepared by taking solid wastes of industrial byproducts of a phosphorite mountain and the periphery of the phosphorite mountain as main raw materials, and the mechanical property of the prepared filling slurry after solidification needs to meet an engineering filling strength index, so that efficient resource utilization of a large amount of industrial solid wastes for phosphorite resource development can be realized; good mechanical properties and remarkable economic and environmental benefits are achieved.

The invention relates to a high-temperature acidolysis reaction defluorination method, and belongs to the technical field of phosphorus chemical resource recycling. The technical problem to be solved by the invention is to provide a high-temperature acidolysis reaction defluorination method which is simple to operate and high in defluorination rate. According to the method, phosphorite powder / white fertilizer is subjected to high-temperature acidolysis, fluoride in the phosphorite powder / white fertilizer reacts with strong acid, fluorine is separated from a reaction system in a gas form, and hydrofluoric acid is obtained through condensation. The method is simple, is simple and convenient to operate, and is easy to realize technologized large-scale production. Meanwhile, due to the destructive effect of the strong acid on the lattice structure of the phosphorus-calcium compound, citrate-soluble phosphorus can be converted into soluble phosphate, subsequent phosphorus recovery is facilitated, comprehensive utilization of phosphorite and elimination of white fertilizer output are achieved, meanwhile, the problems of material accumulation and resource waste of enterprises are solved, and the method conforms to the circular economy concept of green development.

The invention discloses artificial soil based on manganese slag, red mud and ardealite. The artificial soil is mainly prepared from a manganese slag-red mud-ardealite mixed matrix and a modifier, the weight ratio of the manganese slag to the red mud to the ardealite in the manganese slag-red mud-ardealite mixed matrix is (0.4-1.6): (0.1-0.5): (0.5-0.9); the modifier comprises calcium oxide, and further comprises rice straw, biochar, zeolite or a combination thereof, and the modifier accounts for 1-15% of the weight of the artificial soil. Accordingly, a corresponding preparation method is also established. According to the method, the three solid wastes are mixed according to the characteristics, so that specific pollutants such as ammonia nitrogen, phosphorus, fluorine and Mn < 2 + > can be fixed, the reduction of heavy metals is realized, the nutrients beneficial to plant growth are reserved, the artificial soil with rich nutrients is synchronously reconstructed, the qualitative change from waste residues to resources is realized, the process is simple, and the effect is good. The obtained artificial soil can be used for greening planting, supplementing manganese ore, aluminum ore and phosphorite surrounding soil deficiency areas, and solving the problems of no soil, ploughability and ecological restoration of mining areas.

The invention discloses a long-acting stable filling agent for phosphorite mining and a preparation method and application thereof, the long-acting stable filling agent takes cement, slag powder, phosphogypsum and fly ash as matrix components, and is supplemented with additives such as a nano modified liquid, a retarder and an early strength agent. The 3d compressive strength reaches 4.6-5.5 MPa, the 28d compressive strength reaches 13.5-15.5 MPa, the 90d strength retention rate in a simulated acid environment is larger than or equal to 84%, the volume shrinkage rate is smaller than or equal to 0.5%, and the early strength and the excellent long-term acid-resistant stability are both high. Through a synergistic effect of a nano-micron composite structure, pores are filled with nano particles and secondary hydration is promoted, basalt fibers are bridged to resist cracking, and nano montmorillonite blocks acid etching, so that unification of high early strength and long-acting acid resistance is realized. The material is simple and convenient in preparation process, can be efficiently used for mining and filling of phosphorite mountains, and meets the requirements of rapid support and long-term acid medium erosion resistance.

The invention belongs to the field of phosphorite mountain mining, and relates to a mining method suitable for a gently inclined thick and large phosphorite body containing a soft interlayer, which comprises the following steps: carrying out stope division and pseudo-inclined strip arrangement, dividing the ore body into manageable mining units, and optimizing a stoping sequence and a filling strategy; roof pre-cutting construction and roof supporting are conducted, a top ore bed is stoped and supported, and the stability of a roof is controlled; stoping the chambers, extracting the ores in the chambers, and adopting different stoping modes according to the thicknesses of the clamped ores, so as to maximize the ore recovery rate and minimize the loss; clamping stone processing and transferring are conducted, processing is conducted according to the thickness of the clamping stone, the clamping stone is removed to improve the ore grade, or the clamping stone is reserved; a filling retaining wall is constructed, and a retaining wall is arranged in the mined-out area after stoping; and subsequent filling and pillar stoping are conducted, the goaf is filled with filling materials, surrounding rock is supported, and pillars are stoped to achieve comprehensive recovery of resources. The problems that a traditional method is high in depletion rate, difficult in roof control and poor in adaptability are solved, and the mine production efficiency is remarkably improved.

The invention discloses a method for improving phosphorite reaction activity and fluorine resource recovery rate. The method mainly aims at medium-low-grade collophanite after flotation, and comprises the following steps: firstly, pretreating phosphorite by using fluosilicic acid to prepare high-concentration phosphorite slurry; carrying out premixing reaction on the phosphoric ore pulp and phosphoric acid, and then carrying out crystallization reaction with sulfuric acid with a certain concentration; a flash cooling and flue gas washing system is arranged in each reaction area, so that escape and recovery of fluorine are enhanced; and after the reaction is finished, filtering and washing to obtain phosphoric acid and phosphogypsum. The phosphorite is pretreated by using low-concentration fluosilicic acid recovered in a phosphoric acid concentration section, the phosphorite pre-decomposition pH is adjusted by using fluosilicic acid, carbonate, silicate and quartz impurities in the phosphorite are preferentially dissolved, and micro-channels are formed on the surfaces of phosphorite particles, so that the subsequent use amounts of phosphoric acid and sulfuric acid are reduced, and the content of aluminum phosphate ions in the product is reduced; the phosphorite acidolysis efficiency is improved. Meanwhile, introduction of fluosilicate accelerates escape of fluorine in phosphorite, and the fluorine yield of the system is increased.

The invention belongs to the technical field of phosphorite beneficiation, and relates to a collophanite re-flotation combined selection and middle grading quality-grading flotation method. According to the technical scheme, the method comprises the steps that phosphoric ore pulp is fed into a spiral chute set to be reselected, reselected products including reselected concentrate and reselected tailings are obtained, then the reselected concentrate obtained through separation is fed into a flotation dealumination procedure, reselected concentrate and tailings are obtained, the tailings obtained after reselected flotation are fed into a grading and grading procedure, and tailings 1 and middlings are obtained. And then the middlings and the spiral chute heavy tailings are combined and enter a heavy tailing flotation dealumination procedure, and heavy tailing concentrates and tailings 2 are obtained. The process has the advantages that the mixed heavy, fine and heavy tailings can be effectively classified in the industrial production, so that the flotation comprehensive recovery rate in the industrial production is effectively improved, and the flotation auxiliary material cost is reduced.

The application provides a phosphate ore sorting method, an electronic device and a medium. In a preprocessing stage, a high-energy image obtained from raw ore is registered with a low-energy image as a reference, a difference image representing a gray difference is obtained from the registered high-energy image and the low-energy image, and the low-energy image, the registered high-energy image and the difference image are fused in three channels to obtain a pseudo-color image. In an intelligent identification stage, the pseudo-color image is taken as input, and a target detection model based on deep learning is used for processing, so that accurate and efficient identification of phosphate ore in the raw ore is realized.

The application is a beneficiation method for removing iron and aluminum sesquioxide from high-grade collophanite, and belongs to the technical field of mineral processing. The material obtained by crushing, superfine grinding and grading of raw ore is fed into a heavy separation operation to obtain a heavy separation concentrate and a heavy separation tailing; the heavy separation concentrate is fed into a reverse flotation magnesium removal operation buffer tank, and the heavy separation tailing is thickened, re-ground, classified, and then subjected to positive flotation desliming and positive flotation desilication, and the obtained concentrate is fed into the reverse flotation magnesium removal operation; three backwater pools are built to store positive flotation desilication backwater, reverse flotation magnesium removal backwater and heavy separation operation backwater respectively. The method mainly aims at high-grade high-sesquioxide calcareous collophanite, adopts heavy and float combined separation, divides the raw ore into a heavy separation concentrate and a heavy separation tailing through a heavy separation device, and subjects the heavy separation tailing to positive and reverse flotation to obtain a heavy tailing flotation concentrate. The separation process fully utilizes the advantages of positive and reverse flotation and heavy separation, the process flow is stable, the separation effect is good, high-quality phosphorus concentrate is realized, and low-quality phosphorus concentrate can be used.

This invention relates to the field of fertilizer production technology, specifically to a segmented ripening preparation process for low-free-acid, high-water-soluble superphosphate; the process includes the following steps: feeding phosphate rock powder into a ball mill for grinding to a particle size ≤120 mesh, preparing 93%±0.5% industrial sulfuric acid; adding phosphate rock powder at a molar ratio of available P2O5 to sulfuric acid of 1:1.05~1:1.07, adding 0.3%~0.5% (by weight of phosphate rock powder) of a modifying agent, and reacting at 65~70℃ for 40~50 minutes. In the later stage of the reaction, low-pressure steam of 0.2 MPa is introduced; staged maturation is carried out, first in a closed chamber at 55~60℃ for 24 hours, and then in a ventilated chamber at 45~50℃ and a wind speed of 0.8~1.0 m / s for 48 hours; granulation and screening are carried out, with the granulation drum rotating at 14~16 r / min and tilted at an angle of 3°~5°; through the above methods, the problems of high free acid, low proportion of water-soluble phosphorus and insufficient production efficiency in traditional processes are solved, and the product quality and production capacity are synergistically improved.

The invention discloses a dechlorination method of a wet-process phosphoric acid process, and belongs to the technical field of dechlorination of wet-process phosphoric acid. The method comprises the following steps: adding ground phosphorite into a reaction tank A, carrying out decomposition reaction on the phosphorite and high-temperature slurry to obtain slurry a, pumping the slurry a into a reaction tank B, adding concentrated sulfuric acid and a sodium persulfate solution, activating sodium persulfate in the inherent high temperature, strong acid and Fe2 environment, carrying out oxidation dechlorination reaction, and carrying out solid-liquid separation to obtain low-chlorine phosphoric acid and phosphogypsum; finally, the reaction tank B is connected with a tail gas washing system, water is used for circulating washing, then alkali liquor is used for countercurrent washing, and the pollution discharge standard is met. The oxidation dechlorination process is integrated in the wet-process phosphoric acid production process for the first time, chloride ions are efficiently oxidized into chlorine to be removed by utilizing the strong oxidizing property of sodium persulfate, the dechlorination rate can reach 95% or above, the chlorine content in phosphoric acid is remarkably reduced, equipment corrosion is relieved, the product quality is improved, and the method is simple in process, low in energy consumption, low in cost, green, environmentally friendly and suitable for industrial production. The method is suitable for industrial application.

The invention relates to a pre-separation process for reducing the phosphorus loss rate of micro-fine particle collophanite. According to the technical scheme, the method comprises the steps that phosphoric ore pulp is introduced into pre-separation operation, an emulsifying collecting agent and a foaming agent are added into the phosphoric ore pulp, pre-separation is conducted, an in-tank product I and a foam product I are obtained, and the foam product I is tailings I; the product I in the tank is introduced into reverse flotation roughing operation, a dealumination collecting agent is added into the product I in the tank for roughing, and a product II in the tank and a foam product II are obtained; and the foam product II is introduced into scavenging operation, a dealumination collecting agent is added into the product I in the tank for scavenging and roughing, a product III in the tank and a foam product III are obtained, the foam product III is tailings II, and the product III in the tank and the product II in the tank are combined into phosphate concentrate. According to the method, pre-separation is conducted on the micro-fine-particle collophanite, the problem that the micro-fine-particle collophanite is poor in separation performance is effectively solved, the grade of tailings can be greatly reduced, the phosphorus loss rate of micro-fine-particle collophanite separation is reduced, meanwhile, scavenged middlings do not enter a circulation and are directly combined into phosphorus concentrate, the phosphorus concentrate yield is further increased, the whole technological process is an open circuit, and the method is suitable for industrial production. The process is short and easy to control, and industrialization can be realized.

The invention discloses a collophanite dry sorting method based on combination of color sorting and a dense medium fluidized bed. According to the method, aiming at the defects of high environmental protection risk and insufficient single color sorting precision of existing wet sorting, efficient quality improvement of medium-low-grade collophanite is realized through a synergistic process of color sorting classification and dry-method dense medium fluidized bed enrichment: firstly, raw ore is crushed, concentrate, middling and tailings are obtained through two-stage color sorting classification, the concentrate is subjected to secondary color sorting, and the concentrate is subjected to secondary color sorting; the crushing size fraction is adjusted according to the content of phosphorus pentoxide, then an iron powder dense medium matched with the mineral particle size is adopted, and accurate separation is achieved through differentiated fluidization separation density. The whole process is free of water and chemical agents, the average grade of the concentrate reaches 20% or above, the phosphorus recovery rate is 80% or above, the environment-friendly requirements of ecological sensitive areas such as water sources are met, medium-low-grade resources can be fully utilized, the production cost is reduced, and the adaptability is wide.

The invention discloses a method for preparing yellow phosphorus from refractory siliceous phosphorite, and solves the technical problem of how to improve the suitability of refractory siliceous phosphorite powder. Comprising the following steps: a) adding a pretreatment adhesive into refractory siliceous ground phosphate rock, then carrying out wet grinding pretreatment to obtain wet fine powder, and then carrying out first heating treatment on the wet fine powder to obtain dried pretreated mineral powder; b) mixing the pretreated mineral powder with a forming adhesive and water to obtain a mixed material, and then carrying out compression molding on the mixed material to obtain phosphate rock green pellets; c) carrying out second heating treatment on the green phosphorite pellets to obtain dried and solidified phosphorite pellets; d) the phosphorite pellets, a carbonaceous reducing agent and a siliceous flux are mixed and then fed into an electric furnace to be smelted, and furnace gas containing yellow phosphorus steam is generated; e) dedusting and purifying the furnace gas, and condensing the dedusted and purified furnace gas so as to recover yellow phosphorus and produce tail gas rich in carbon monoxide; wherein the pretreatment of the adhesive and the wet grinding pretreatment are cooperated.

The application discloses a horizontal shallow hole and ore remaining room pillar method suitable for phosphorite residual ore mining, which comprises the following steps: firstly, designing middle section and stope structure parameters, determining the position of the ore pillar, then performing preparation and cutting engineering, and finally, in the process of the last mining, after rock drilling and blasting, ventilation and ore leveling, a working face for subsequent mining is formed, then in the subsequent mining, with the increase of the stripped ore and the expansion of the mined-out area, three continuous working zones of mining, ore transportation and dry filling are formed between two ore pillar mining areas, and the mining is repeatedly performed. In order to cope with the complex engineering environment of the phosphorite, for the area with poor operation conditions, a door-shaped arch pillar is used between the ore pillars to improve the stability of the mined-out area. The application can improve the residual ore mining efficiency of the lower layer existing mined-out area, is safe and reliable in mining operation, low in production cost, small in engineering quantity, high in adaptability to engineering environment, and can fully utilize the ore pillar condition of the mined-out area to meet the supporting requirement.

The utility model discloses an efficient intelligent phosphorite flotation cell which comprises a flotation cell body, a plurality of partition plates are arranged in the flotation cell body to divide the flotation cell body into a plurality of cell bodies, a stirring device is arranged in each cell body, grooves for foam to flow out are formed in the top ends of the two sides of the flotation cell body, and a laser foam breaker is arranged at one end of each groove. The aeration holes of the air distributor are improved, bubbles are generated more sufficiently, capturing of hydrophobic mineral particles is facilitated, the flotation effect is better, and the flotation efficiency is higher. An infrared liquid level instrument installed on a phosphorite flotation tank body is in linkage with an air distributor installed at the bottom end of a flotation machine stirring paddle, the height of a foam layer is detected through infrared liquid level scanning, when the foam layer is too high, the air distributor automatically reduces the inflation amount and reduces generation of bubbles, and when the foam layer is too low, the air distributor automatically increases the inflation amount and increases generation of bubbles. And intelligentization and automation of the equipment are realized. And the laser bubbles are adopted, so that the bubbles can be broken more quickly and thoroughly, and the water consumption is also reduced.

The application provides a heavy medium separation method for phosphate ore, fluorite ore, barite ore and polymetallic ore, which comprises the following steps: separating the ore corresponding to the real-time operation state data of the ore through a preset gradient density heavy medium separation system; the gradient density heavy medium separation system has a partition independent medium recovery module and a suspension liquid density intelligent control module; and the separation density characteristics are obtained through the partition independent medium recovery module and the suspension liquid density intelligent control module. The application can realize the accurate separation of polymetallic associated ore, obtain various products such as phosphate concentrate, fluorite concentrate and barite concentrate, and improve the resource utilization rate. In addition, the anti-mud interference control algorithm is generated through a medium non-magnetic substance content accumulation prediction model, which effectively deals with the separation challenge of ore with different mud content and grade, and ensures the stability and separation precision of the system under complex working conditions.

This invention relates to the field of mine backfilling technology and discloses a process for backfilling phosphogypsum solid waste in phosphate mine goafs. The process includes: erecting a wavy backfilling pipeline along the base plate, consisting of alternating uphill and downhill pipe sections; pumping prepared phosphogypsum slurry into the pipeline for transport; as the slurry flows through the uphill pipe section, its own weight increases the axial extrusion pressure, driving free water to seep into the pipe wall to form a boundary liquid film; as it flows through the downhill pipe section, its own weight reduces the extrusion pressure, generating negative pressure to draw the boundary liquid film back into the slurry; by alternating pipe sections, a periodic seepage and backflow cycle of free water is established, transporting the slurry to the goaf for consolidation. This invention utilizes the undulation of the pipeline to induce stress alternation in the slurry, spontaneously constructing a lubricating liquid film regeneration mechanism, blocking liquid phase dissipation, eliminating the need for additional components, reducing friction along the route, and ensuring stability during long-distance transport.

The utility model relates to the technical field of mineral separation, in particular to a pre-desliming dust-falling blanking device assisting photoelectric separation effect, which is characterized in that a feed port is arranged on one side of a blanking bin, the tail end of a raw ore conveying belt extends into the blanking bin through the feed port, and a discharge port is arranged at the bottom of the blanking bin; the top of the blanking bin is connected with a dust collector; a water conveying pipe is fixedly installed on the side wall of the portion, located above the feeding port, of the discharging bin, a plurality of filtering plates are fixedly installed on the left side wall and the right side wall of the portion, located below the feeding port, of the discharging bin correspondingly, the multiple filtering plates are vertically arranged at intervals, and the filtering plates located on the left side wall and the right side wall of the discharging bin are arranged in a staggered mode; the ends, away from the corresponding side walls of the discharging bin, of the filtering plates are arranged in an inclined lowering mode, and the lower filtering plate receives mineral aggregates falling off through the upper filtering plate. Slurry on the surface of phosphorite is sprayed and flushed through the water conveying pipe and the flushing pipe, or dust on the surface of phosphorite is flushed through the air blowing pipe and is sucked away through the dust collector, and the dirt and the dust on the surface of phosphorite can be effectively removed.

The invention is applicable to the technical field of mine ventilation, and provides a ventilation device for phosphorite mining, which comprises an air guide pipe, the bottom of the air guide pipe is communicated with a supporting seat, and is characterized in that an electric heater for heating the air guide pipe is arranged in the supporting seat, and one end of the air guide pipe is in sliding connection with an air inlet sleeve; the end, away from the air guide pipe, of the air inlet sleeve is conical, the other end of the air guide pipe is fixedly connected with a separation pipe through a connecting plate, the end, close to the air guide pipe, of the separation pipe is conical, and a flow guide mechanism is arranged in the air guide pipe. According to the technical scheme, the internal temperature of the air guide pipe is maintained in a proper range under the heating action of the electric heater, the moisture content is remarkably reduced, and stubborn adhesion of dust in a humid environment is fundamentally prevented; a dynamic guide mechanism of the flow guide mechanism concentrates part of wind power into directional impact flow, the directional impact flow accurately acts on the surface of the filtering mechanism, and attached dust is removed through physical impact force.

The invention relates to an automatic phosphorite sampling system. The automatic phosphorite sampling system comprises an intelligent weight house, an automatic sending station and an automatic sampling machine, wherein the intelligent weight house is used for sending a first sampling instruction to the automatic sending station once in a wireless communication mode every time the accumulated total mass of the target type of phosphorite meets a preset condition, and the preset condition is that the ratio of the accumulated total mass of the target type of phosphorite to the preset mass is a positive integer; the automatic sending station is used for sending the first sampling instruction to the automatic sampling machine in a wired communication mode when the first sampling instruction is received; the automatic sampling machine is used for sequentially executing first sampling operation and crushing and division operation when receiving the first sampling instruction, the first sampling operation at least comprises the step of obtaining target phosphorite from the conveying belt, and the crushing and division operation comprises the step of carrying out crushing and division treatment on the obtained target phosphorite. The system solves the problem that a phosphorite sample cannot reflect the overall quality of a whole batch of phosphorite in the prior art.

The invention provides a phosphorite double-reverse flotation defoaming agent as well as a preparation method and an application method thereof. The defoaming agent is prepared from vinyl silicone oil, hydrogen-containing silicone oil, simethicone, polyether modified silicone oil, an emulsifier, white carbon black, MQ silicon resin, a dispersing agent, a catalyst, a thickening agent, water and the like, all the materials are uniformly mixed according to a certain proportion, and the mixture is prepared into a uniform emulsion by using high-speed dispersion equipment for use. The efficient defoaming agent is successfully synthesized by taking the silicone oil as a raw material, has good defoaming and foam inhibition performance, is fast in defoaming and lasting in foam inhibition, has excellent defoaming performance under a high-temperature condition, and has an important application value in phosphorite flotation production.

The utility model discloses an environment-friendly phosphoric ore pulp conveying pipeline which comprises a pipeline body, a matching hole is formed in the lower end of the pipeline body, an arc-shaped pipe is installed in the matching hole, a rotating shaft is arranged in the arc-shaped pipe, a spiral conveying piece is installed on the outer surface of the rotating shaft, and a first bevel gear is installed on the right portion of the outer surface of the rotating shaft and meshed with a second bevel gear. A collecting opening is formed in the left portion of the lower end of the arc-shaped pipe, a collecting frame is arranged at the lower end of the collecting opening, a clamping mechanism is installed on the side face of the collecting frame, and the collecting frame is matched with the arc-shaped pipe through the clamping mechanism. Through the arrangement of the arc-shaped pipe, particles at the bottom in the pipeline fall into the arc-shaped pipe, the motor drives the spiral conveying piece to rotate to push the particles in the arc-shaped pipe forwards, the particles fall into the collecting frame through the collecting opening, cleanliness of the bottom of the pipeline is guaranteed, and it is avoided that particle accumulation in the pipeline influences phosphorus ore pulp conveying.

The invention discloses a method for producing a high-phosphorus-content calcium magnesium phosphate fertilizer by using an industrial byproduct magnesium ammonium phosphate, which comprises the following steps: drying and screening magnesium ammonium phosphate, adding phosphorite, dolomite or serpentine and coke or anthracite, feeding the materials into a smelting furnace according to a ratio, melting and smelting at a high temperature, blowing air or oxygen by an air blower at the smelting temperature of 1400-1600 DEG C for 2-3 hours, and cooling to room temperature to obtain the high-phosphorus-content calcium magnesium phosphate fertilizer. The smelting time is 0.5-4 hours, discharging molten slag from a slag opening of the smelting furnace, and carrying out water quenching to obtain the calcium magnesium phosphate fertilizer; gas generated in the process enters a hot-blast stove along with smelting furnace gas, at the moment, the temperature of a hearth of the hot-blast stove reaches 900-1000 DEG C due to gas combustion, and ammonia reacts with nitrogen oxide in the tail gas to obtain nitrogen and water, and reacts with sulfur dioxide to finally obtain ammonium bisulfate. According to the invention, resource utilization of the industrial byproduct magnesium ammonium phosphate can be realized, the calcium magnesium phosphate fertilizer with high phosphorus content can be obtained, and nitrogen oxides and sulfur dioxide in the tail gas in the production process of the calcium magnesium phosphate fertilizer can be more effectively removed.

The invention provides a room-and-pillar type phosphorite mining method for pre-filling and constructing continuous intermediate pillars, and belongs to the technical field of underground mine mining. The method mainly comprises the following steps: S1, advanced mining preparation: constructing a cutting uphill and a strip type roadway of a next to-be-mined ore block in advance while or before the current ore block is mined; s2, strip-type filling is conducted to construct a continuous interval column, continuous and dense concrete filling is conducted on a strip-type roadway at the specific position, a continuous concrete structural body is formed after hardening and serves as an ore block interval column, and the structural body synchronously replaces the functions of an ore top column and an ore bottom column needed by traditional mining; and S3, ore block stoping is conducted, specifically, stoping is conducted on the ore room according to a room-and-pillar method process in cooperation with a small number of reserved ore point columns under lateral and top and bottom plate supporting of the continuous concrete space columns. According to the method, the problem that the stability of ore pillars is poor under the deep high ground pressure condition is effectively solved through the mode of replacing pillars with filling, the hidden danger of roof collapse is eliminated, and meanwhile the recovery rate of phosphorite resources is remarkably increased.

The invention discloses a high-valued comprehensive utilization method of high-aluminum low-grade phosphorite. The method comprises the following steps: mixing high-aluminum low-grade phosphorite serving as a raw material with excessive phosphoric acid under the action of an aluminum dissolving inhibitor for acidolysis, and filtering after the reaction is finished to obtain an acidolysis solution and acid leaching residues; adding sulfuric acid into the acidolysis solution, continuously reacting, and filtering to obtain high-quality wet-process phosphoric acid and phosphogypsum; a sodium hydroxide solution is added into the acid leaching residues for an alkali dissolution reaction, and alkali dissolution residues and an alkali solution are obtained through filtering after the reaction is finished; and introducing CO2 into the alkali solution, and filtering, washing and drying after the reaction is finished to obtain the high-purity aluminum hydroxide. According to the method, the phosphorus element in the high-aluminum low-grade phosphorite enters the acidolysis solution through selective acidolysis, the aluminum element enters the acid leaching residues, and high-quality wet-process phosphoric acid and high-purity high-whiteness clean gypsum are produced while directional enrichment and efficient separation of the phosphorus element and the aluminum element are achieved; the aluminum element is recycled from the acid leaching residues through alkali dissolution, carbonation and calcination methods, and the high-added-value product nano aluminum oxide is prepared.

The utility model relates to the technical field of mineral processing, and discloses a multi-stage sorting machine for phosphorus separation of concentrated magnetic tailings, which comprises a supporting table, a grading box is fixedly mounted at the top of the supporting table, a crushing box is fixedly mounted at the top of the grading box, a first rotating shaft is movably mounted in the crushing box, and a second rotating shaft is movably mounted in the first rotating shaft. And the two ends of the first rotating shaft penetrate through the interior of the crushing box. Concentrated magnetic tailings are crushed through the two crushing wheels, the granularity of the tailings is obviously reduced and tends to be uniform by crushing the concentrated magnetic tailings, the grading efficiency of the subsequent separation process is improved, meanwhile, the tailings are slowly and uniformly introduced between the two crushing devices through the splitter plate, the continuity and stability of the crushing process are ensured, and the separation efficiency of the tailings is improved. The crushing efficiency is improved, due to particle size homogenization, the separation precision and accuracy are improved, a high-quality phosphorite product is obtained, the loss of useful minerals is reduced, and the recovery rate is improved.