32 results about "Scheelite" patented technology

This invention discloses an efficient separation and beneficiation method for scheelite, wolframite, and cassiterite in a tungsten-tin mixed concentrate, comprising the following steps: (1) pre-treatment by grinding, flotation desulfurization, and weak magnetic separation to remove iron from the tungsten-tin mixed concentrate to obtain weak magnetic tailings; (2) concentration and drying of the weak magnetic tailings obtained in step (1) followed by electrostatic separation to obtain electrostatic concentrate and electrostatic tailings; (3) stirring and slurry conditioning of the electrostatic concentrate obtained in step (2) followed by strong magnetic separation to obtain strong magnetic concentrate and strong magnetic tailings; stirring and slurry conditioning of the electrostatic tailings obtained in step (2) followed by scheelite upgrading flotation to obtain scheelite concentrate and scheelite flotation tailings. Based on the differences in conductivity, magnetism, and flotation properties of scheelite, wolframite, and cassiterite, this invention employs a “cassiterite / wolframite electrostatic separation-wolframite / cassiterite strong magnetic separation-scheelite upgrading flotation” process to achieve efficient separation of wolframite, scheelite, and cassiterite.

The utility model relates to the technical field of filling mining, and discloses a gently inclined medium-thickness ore body filling mining device which comprises a vehicle body, limiting sliding grooves are formed in the front inner wall and the rear inner wall of the vehicle body, a feeding hopper is fixedly installed at the left end of the bottom of the vehicle body, and a first conveying mechanism is arranged on the right side of the feeding hopper. A discharging hopper is fixedly installed at the right end of the bottom of the vehicle body, a second conveying mechanism is arranged on the left side of the discharging hopper, two crushing rollers are arranged between the first conveying mechanism and the second conveying mechanism, a second rotating shaft is fixedly inserted in each crushing roller, and a transverse plate is arranged at the bottom of each crushing roller; and it is ensured that discharged scheelite is fully crushed, later fine treatment is facilitated, and the practicability of the device is effectively improved.

The invention relates to scheelite matrix non-rare earth activated dark red fluorescent powder. The composition of the material is M3A2 (W, Mo) (1-x-y) O9: xMn < 4 + >, yBi < 3 + >, in the formula, M is any one of alkaline earth metals Ca, Sr and Ba; a is any one of Y, Gd and La; 0 lt; 0 < = y < = 1%. The dark red fluorescent powder provided by the invention is stable in matrix structure and performance, relatively good in physical and chemical stability, stable in luminescence performance, firm and uniform in particle, and relatively high in crystallinity and purity. A tungsten molybdate solid solution is used as a matrix, Mn < 4 + > is used as a luminescence center, Bi < 3 + > is used as a sensitizer, the raw materials are easy to obtain and non-toxic, and the prepared product can effectively absorb near ultraviolet light in the range of 300-400 nm and emit dark red light in the range of 650-700 nm, and has a certain beneficial effect of supplementing red light in the field of current white light LEDs and plant illumination LEDs.

The invention discloses a beneficiation method for efficiently separating scheelite, wolframite and cassiterite in tungsten-tin bulk concentrate. The beneficiation method comprises the following steps that (1) the tungsten-tin bulk concentrate is firstly subjected to ore grinding, flotation desulfurization and magnetic separation iron removal, and iron-removed tailings are obtained; (2) performing scheelite normal-temperature flotation on the iron-removed tailings to obtain scheelite rough concentrate and scheelite flotation tailings; (3) the scheelite rough concentrate is subjected to flotation upgrading, scheelite upgraded rough concentrate is obtained, and wolframite and cassiterite are deeply inhibited in the flotation upgrading process; the scheelite quality-improved rough concentrate is subjected to quality-improved fine selection, and scheelite concentrate is obtained; (4) the scheelite flotation tailings are subjected to magnetic separation to achieve separation of wolframite and cassiterite, and wolframite concentrate and tin rough concentrate are obtained; and (5) gangue minerals are removed from the tin rough concentrate through electric separation, and tin concentrate is obtained. According to the beneficiation method, tungsten and tin resources can be efficiently and comprehensively recycled.

The invention provides a beneficiation method for recovering scheelite from low-grade tailings, and belongs to the technical field of ore separation processes. According to the method, the tungsten-containing tailings which are low in grade, low in value and difficult to recover are converted into valuable and easy-to-recover ore resources at low cost through the magnetic separation / centrifugal machine reselection combined physical mineral separation technology, and the reagent cost of subsequent flotation is greatly reduced. Then carrying out a flotation test, and discarding tailings of flotation middlings by adopting a centrifugal machine so as to remove gangue which is easy to float and argillization and avoid continuous circulation and accumulation of the gangue in a closed circuit to influence the floating of target minerals and the quality of concentrate; meanwhile, a nontoxic and environment-friendly gangue inhibitor CD-6 is adopted and matched with a CK-3 composite collecting agent, efficient separation of gangue minerals and tungsten minerals is achieved, finally, comprehensive recycling of extremely-low-grade tungsten-containing tailing resources is achieved, and a new effective method is provided for development and utilization of similar tungsten-containing tailing resources.

The invention belongs to the field of mineral processing and secondary resource recycling, and particularly relates to a method and a system for recovering tungsten from scheelite heating concentrate tailings, the method comprises the following steps: blowing carbon dioxide-containing gas into slurry containing the scheelite heating concentrate tailings, and carrying out gas-solid-liquid three-phase activation treatment to obtain activated ore pulp; and then the activated ore pulp is directly subjected to roughing without an additional collecting agent, and scheelite roughing concentrate is obtained. According to the method, carbon dioxide is creatively adopted for carrying out gas-solid-liquid three-phase modification activation on the tailings, in this way, the surface property of the tailings can be optimized, scheelite surface calcium sites are selectively activated, and the recovery rate and the collecting selectivity of tungsten in the tailings can be effectively improved through further cooperation with subsequent direct flotation treatment without additional agents.

This invention belongs to the field of mineral processing technology, specifically disclosing a method for recovering scheelite and fluorite from scheelite rough concentrate by ambient temperature flotation. It replaces the traditional reagents used in laboratory-scale tests with a reagent combination of sodium carbonate, brine glass, and a lead nitrate-hydroxyvalerate complex. Combined with grinding, concentration, and de-removal pretreatment, this method achieves efficient recovery of scheelite and fluorite from scheelite rough concentrate under ambient temperature conditions. The recovered scheelite concentrate has a WO3 grade of over 32.95%, with an operational recovery rate of over 61.55%; the fluorite concentrate has a CaF2 grade of over 93.22%, with an operational recovery rate of over 51.25%. This method achieves comprehensive recovery and utilization of associated resources, eliminating the need for heating or acid leaching treatment and significantly reducing energy consumption.

The present application belongs to the field of calcium-containing mineral flotation, and particularly relates to a combined collector, which comprises a collector A and a collector B, wherein the collector A is at least one compound with the structural formula of formula 1; the collector B is a collector capable of collecting scheelite; in R1-R4, at least two substituents are substituents of formula a, and the remaining substituents are H, C1-C3 alkyl or formula a. The present application also includes the use of the combined collector for the collection and flotation of scheelite. The combined collector can synergistically improve the flotation of scheelite and help to improve the selective flotation separation of scheelite and calcium-containing gangue.

The application discloses a combined depressor for recovering scheelite from ultra-low-grade tungsten-molybdenum associated ore and a method, the combined depressor comprising sodium humate, sodium mercaptoacetate, ammonium citrate, sodium pyrophosphate, sodium fluosilicate and lead nitrate, and the six kinds of substances are configured into the combined depressor in a proportion of 1:1:(2-5):(1-5):(1-3):(2-5). The application aims at recovering scheelite from low-grade refractory ore, improves the separation effect of scheelite and gangue minerals, improves the scheelite recovery rate and the concentrate grade, and improves the economic benefit.

This invention discloses a method for treating scheelite beneficiation wastewater based on gradient desiliconization and micro / nano bubble oxidation. The method includes the following steps: adding lime to the scheelite beneficiation wastewater for coagulation and sedimentation; collecting the primary supernatant after sedimentation separation; adding a calcium source for deep desiliconization; introducing micro / nano bubbles for oxidation treatment; removing scum from the upper layer of the water system; and adjusting the pH of the effluent to complete the deep treatment of the scheelite beneficiation wastewater. This method, through the synergistic effect of "gradient desiliconization" and "micro / nano bubble oxidation," can achieve simultaneous deep removal of silicon and organic pollutants from scheelite beneficiation wastewater. The treated effluent is of stable quality and can be directly reused in the tungsten flotation process, realizing closed-loop wastewater recycling and resource utilization. It is highly efficient, economical, has high practical value, and promising application prospects.

A kind of triclinic BiVO4, tetragonal scheelite BiVO4 and [Bi6O5(OH)3] (NO3) 5·3H2O nanosheet material and its preparation method, comprising: bismuth nitrate pentahydrate and cetyltrimethylammonium bromide are dissolved in distilled water, after stirring, solution A is obtained by reaction in microwave reactor at 100 DEG C;Ammonium metavanadate is dissolved in distilled water, stirring until completely dissolved to obtain solution B;Solution A is added dropwise to the flask containing solution B and stirred to obtain solution C;Solution C is obtained by reaction at 100 DEG C using microwave irradiation method, after suspension is obtained by centrifugation, washing, drying to obtain triclinic BiVO4, tetragonal scheelite BiVO4 and [Bi6O5(OH)3] (NO3) 5·3H2O three-phase coexistence material.

The utility model is applicable to the technical field of scheelite concentrate recovery, and provides a scheelite concentrate recovery device which comprises a bottom plate, a rotating shaft is rotatably mounted on the bottom plate, and a spiral chute for recovering scheelite concentrate is fixedly sleeved on the rotating shaft; the two stop blocks are fixedly arranged on the inner wall of the spiral chute; the material receiving shell is fixedly mounted on the spiral chute, and a plurality of material receiving openings are formed in the material receiving shell; the first motor is arranged below the bottom plate, and an output shaft of the first motor is fixedly connected with the bottom end of the rotating shaft; and the cleaning mechanism is assembled on the bottom plate and is used for cleaning the spiral chute. According to the scheelite concentrate recovery device provided by the scheme, the problem that the labor intensity of workers is increased due to the fact that residual materials need to be manually cleaned after the scheelite concentrate recovery operation is completed through an existing spiral chute is solved.

The application provides a low-grade scheelite and fluorite ore beneficiation separation method. The preparation method adopts a scheelite-fluorite mixed flotation-scheelite-fluorite mixed concentrate reseparation process, through adopting a xanthate collector to preferentially remove pyrite, magnetic pyrite and other sulfide minerals, the interference of the sulfide minerals on subsequent scheelite-fluorite flotation is reduced; then through controlling the pH value of the scheelite-fluorite separation flotation slurry, and under the action of a special inhibitor, the scheelite-fluorite mixed concentrate is subjected to a reseparation process; in this way, the inhibition of fluorite in the traditional preferential flotation of scheelite and then fluorite process can be effectively reduced, and finally the efficient flotation of scheelite and fluorite ore is realized. Through controlling the pH value at 3-5 and adding an inhibitor SW, the argillaceous gangue such as calcite can be effectively inhibited, the floatability of scheelite is good, and the fluorite is basically not floated, so that higher-grade scheelite and fluorite concentrates can be obtained.

The present application belongs to the field of mineral processing and secondary resource recycling, and particularly relates to a method and system for recovering tungsten from scheelite warming cleaning tailings, the method being: blowing carbon dioxide-containing gas into a slurry containing scheelite warming cleaning tailings to perform gas-solid-liquid three-phase activation treatment, obtaining an activated ore slurry, and then directly performing roughing on the activated ore slurry without adding a collector to obtain scheelite roughing concentrate. The present application innovatively uses carbon dioxide to perform gas-solid-liquid three-phase modification and activation, which can optimize the surface properties of the tailings, selectively activate the calcium sites on the surface of scheelite, and further cooperate with the subsequent direct flotation treatment without adding a collector, so as to effectively improve the recovery rate and collection selectivity of tungsten in the tailings.

The invention relates to the technical field of mineral flotation, in particular to a flotation collecting agent for scheelite and a preparation method of the flotation collecting agent. The flotation collecting agent for scheelite comprises the following components in parts by weight: 40-60 parts of a compound A, 10-20 parts of sodium oleate, 5-8 parts of thiadiacid and 1-5 parts of an emulsifier. The flotation collecting agent for scheelite can improve the concentrate yield, grade and recovery rate.

The invention belongs to the technical field of tungsten ore beneficiation, and particularly relates to a pre-enrichment beneficiation method for low-grade mixed tungsten ore. The tungsten ore is sequentially subjected to ore grinding, magnetic separation and flotation, and tungsten rough concentrate and flotation tailings are obtained. The pre-concentration beneficiation method can be applied to efficient pre-concentration of micro-fine-particle wolframite, scheelite and scheelite and wolframite mixed ore, and favorable conditions are created for follow-up concentration. According to the pre-enrichment beneficiation method provided by the invention, the flotation process is reasonably set, and meanwhile, the reagents used in the flotation step are optimized, so that the effective recovery rate of tungsten can be greatly improved, and efficient comprehensive utilization of micro-fine tungsten particles is realized. In conclusion, the pre-concentration beneficiation method has the advantages of being simple in process, friendly to the environment and high in beneficiation recovery rate.

According to the intelligent prospecting data analysis method based on scheelite specific geological feature driving, explicit coding and accurate embedding of scheelite mineralization logic are achieved by constructing an improved GCN model driven by geological rules, it can be forcibly predicted that a target region strictly follows the mineralization rules, and the prediction accuracy is improved. The prediction precision and the positioning accuracy of the prospecting target area are obviously improved; the output prospecting target report is highly consistent with the geological evidence, the exploration period can be effectively shortened, and the invalid exploration cost is reduced; meanwhile, the model provides an intelligent technical scheme with high efficiency and high geological interpretability for precise scheelite prospecting, the misjudgment rate of a non-metallogenic area can be greatly reduced, and the scientificity and reliability of exploration decision making are improved.

The invention relates to a method for cleaning flotation of scheelite, which comprises the following steps of: grinding raw ore, and adding water for size mixing to obtain ore pulp; the ore pulp is subjected to desulfurization roughing and desulfurization scavenging, and sulfur concentrate and desulfurized tailings are obtained; roughing the desulfurized tailings to obtain roughed concentrate and roughed tailings; an inhibitor is added into the roughing concentrate, concentration is conducted five times, and scheelite concentrate and scheelite middlings are obtained; a collecting agent is added into the roughing tailings for scavenging, and tungsten tailings and scavenged concentrate are obtained; by means of the method, the scheelite can be effectively cleaned, floated and separated, the recovery effect of the scheelite is good, and the grade of the obtained scheelite concentrate is high.

The invention provides a beneficiation method for recovering low-grade scheelite from copper-sulfur tailings, and belongs to the technical field of ore separation processes. According to the method, the strong magnetism-centrifugal pre-enrichment-flotation synergistic process is adopted, according to the physical property difference of different ores, the calcium-containing gangue such as garnet is removed in advance through strong magnetic separation, interference of the calcium-containing gangue such as garnet on scheelite flotation is reduced, then the fine silt gangue with the low specific gravity is removed through a centrifugal machine, and the scheelite flotation effect is improved. And meanwhile, the novel compound collecting agent CK-W1 is adopted in a matched mode, the flotation environment is optimized, efficient pre-enrichment of the low-grade scheelite is achieved, and a separation environment with low reagent consumption and high selectivity is created for follow-up flotation.

The application discloses a Pb-BHA-SDBS collector and a tungsten-tin separation method for a tungsten-tin polymetallic ore. The Pb-BHA-SDBS collector is formed by the coordination of benzohydroxamic acid, sodium dodecyl benzene sulfonate and lead ions, has high selectivity and high strong collecting capacity for tungsten-tin minerals in a complex tungsten-tin polymetallic ore system, and can realize the co-enrichment of wolframite, scheelite and cassiterite. Based on this, the tungsten minerals and cassiterite in the tungsten-tin polymetallic ore are preliminarily co-enriched by using the Pb-BHA-SDBS flotation reagent system, the mixed concentrate is treated by removing the reagent, the tetradecyl imino dimethyl phosphonic acid flotation reagent system is used, the separation of the cassiterite and the tungsten minerals is easily realized, the cassiterite enters the concentrate to become tin concentrate, and the tungsten minerals enter the tailings to become tungsten concentrate, so that the efficient separation and recovery of the tungsten minerals and the cassiterite in the tungsten-tin polymetallic ore are realized, and the tungsten and tin resources are synergistically extracted.

The invention provides a scheelite metallogenic potential intelligent identification method based on multi-source data fusion, and the method comprises the steps: carrying out the feature extraction and modeling through the Transform and CNN in a deep neural network through the comprehensive application of the multi-source data, coding the spatial position information into a feature vector, and carrying out the fusion with the original features, thereby achieving the intelligent identification of the metallogenic potential of scheelite. Therefore, a bidirectional cross-modal fusion layer is constructed, and mutual enhancement between geology and multi-modal information of geophysics, geochemistry, remote sensing and the like is realized. Meanwhile, a self-adaptive gating mechanism is introduced, the most critical features for predicting the mineralization potential are dynamically screened, and precise recognition of the scheelite mineralization potential is achieved. According to the method, the core problem of high mineralization potential misjudgment rate in a traditional method is effectively solved, and the recognition accuracy and reliability are remarkably improved.

This invention belongs to the field of mineral resource recycling technology, specifically disclosing a beneficiation method for recovering ultra-low-grade scheelite from molybdenum tailings. For refractory scheelite with severe alteration and mudding, the method employs pre-slurry conditioning, enhanced pretreatment with reagents moved forward, followed by grinding and classification of the raw ore. By combining collectors, the refractory scheelite is synergistically recovered, ultimately obtaining a tungsten concentrate with a grade >26%, achieving a comprehensive actual recovery rate of 77%. This invention's process achieves full recovery and utilization of refractory scheelite resources in tailings, while reducing the operating costs of refractory ore recovery, creating considerable economic and social benefits.

The present application relates to the technical field of mineral flotation, and particularly relates to a flotation collector for scheelite and a preparation method thereof.The flotation collector for scheelite comprises the following components in parts by weight: compound A 40-60 parts, sodium oleate 10-20 parts, thiadic acid 5-8 parts, and emulsifier 1-5 parts.The flotation collector for scheelite can improve the concentrate yield, grade and recovery rate.

The invention relates to a beneficiation method for recovering extremely-low-grade scheelite from tailings. The beneficiation method comprises the following steps: grading the tailings; discarding tailings in a spiral chute of + 0.038 mm; performing magnetic separation to remove iron from the spiral ore concentrate; medium-magnetic tailings are subjected to high-gradient high-intensity magnetic separation and discarding; concentrating the strong magnetic tailings by a table concentrator; -0.038 mm centrifugal pre-enrichment of tungsten is carried out; tungsten flotation; and carrying out centrifugal upgrading on flotation tungsten rough concentrate. According to the method, grading treatment is carried out, corresponding mineral separation modes are adopted for tailings of different particle fractions, spiral sliding reselection, medium / strong magnetic separation and shaking table concentration are carried out on coarse particle fractions, centrifugal enrichment, flotation strengthening and centrifugal upgrading are carried out on fine particle fractions, and therefore extremely-low-grade scheelite is recycled from the tailings with high benefits and low cost. The whole process is mainly based on low-cost environment-friendly reselection / magnetic separation and is assisted by flotation with higher cost, so that the benefit maximization is really realized.

This invention belongs to the field of hydrometallurgical technology, specifically disclosing an apparatus and method for semi-continuous alkaline pressure leaching of tungsten minerals. The apparatus includes a vertical pressure leaching vessel, a flash tank, and a compressed air supply system. The inlet of the flash tank is connected to the outlet of the pressure leaching vessel, and the compressed air pipeline is connected to the top of the pressure leaching vessel. After pressure leaching, the pressure inside the vessel naturally drops to 0.3~0.4 MPa. Compressed air is then introduced to force the slurry into the flash tank, rapidly reducing the pressure to atmospheric pressure before discharge. The diameter ratio of the flash tank to a single pressure leaching vessel is 0.7~0.8, and the volume ratio of the flash tank to the total volume of the pressure leaching vessel is 0.1~0.2. This invention combines flash leaching with compressed air-assisted discharge, solving the problems of slow low-pressure discharge and easy clogging caused by the high viscosity and high solids content of tungsten ore slurry. The low-pressure discharge time is reduced from several hours to several minutes, significantly improving equipment utilization, maintaining batch leaching flexibility, and allowing for waste heat recovery. It is suitable for alkaline pressure leaching of wolframite, scheelite, and mixed ores.

The invention belongs to the technical field of recycling of mineral resources, and particularly discloses a beneficiation method for recycling ultralow-grade scheelite from molybdenum beneficiation tailings, which comprises the following steps: aiming at refractory scheelite which is seriously altered and argillized, carrying out pre-size mixing and reagent forward-moving strengthening pretreatment, then grinding and grading raw ore, and synergistically strengthening and recycling the refractory scheelite through a combined collecting agent, so as to achieve the purpose of recycling the ultralow-grade scheelite from the molybdenum beneficiation tailings. Finally obtaining the grade gt; according to the technological process, the refractory scheelite resources in the tailings are fully recycled, meanwhile, the refractory ore recycling operation cost is reduced, and considerable economic benefits and social benefits are created.

The application relates to the technical field of scheelite extraction, and particularly discloses a device and a method for decomposing scheelite in an alkaline system under normal pressure. The device comprises a crushing unit, a grinding unit and a conveying unit, the grinding unit comprises a grinding shell and a power device, grinding blocks are fixed on the inner wall of the grinding shell, a conical cavity is arranged on the grinding blocks along a central axis, a grinding layer is arranged on the wall surface of the conical cavity, a circular table-shaped rotor is arranged in the conical cavity, a hollow rotating shaft is connected to the upper surface of the circular table-shaped rotor, a plurality of receiving grooves are arranged on the circumferential side of the circular table-shaped rotor, an expansion and contraction block is arranged in each receiving groove, and a grinding roller is rotatably connected to the outer end of the expansion and contraction block which extends out of the receiving groove. The device realizes the dual functions of grinding treatment and centrifugal screening, can make the scheelite material be ground and processed for multiple times, can make the scheelite powder be processed to be finer, and can realize multi-stage grinding processing under the action of only one set of grinding mechanism, and the use effect is excellent.

This invention belongs to the field of hydrometallurgical technology, specifically disclosing an apparatus and method for semi-continuous alkaline pressure leaching of tungsten minerals in two stages. The method includes: grinding, primary slurry preparation, primary pressure leaching, primary stage of classification and depressurization followed by flash evaporation discharge, secondary slurry preparation, secondary pressure leaching, secondary stage of classification and depressurization followed by flash evaporation discharge, and the secondary pressure leaching solution is returned to the primary slurry preparation for recycling. This invention utilizes a flash evaporation tank and compressed air to assist in discharge, reducing the low-pressure depressurization time from several hours to several minutes, achieving semi-continuous operation; through secondary pressure leaching and secondary pressure leaching solution recycling, the total tungsten leaching rate reaches over 99%, approximately 2 percentage points higher than existing single-stage leaching processes; simultaneously, both stages of leaching are completed using the same apparatus, eliminating the need for additional pressure leaching equipment. This invention is suitable for deep leaching of scheelite and low-grade complex mixed scheelite-black-white tungsten ores, possessing the advantages of high efficiency, low consumption, and environmental friendliness.

This invention provides a scheelite-like compound, antimony fluoroborate, and a multifunctional crystal of antimony fluoroborate, along with their preparation methods and applications. The compound has the chemical formula SbBO₂F₂ and a molecular weight of 202.56, and is prepared using a vacuum tube sealing method or a hydrothermal method. The crystal has the chemical formula SbBO₂F₂, a molecular weight of 202.56, belongs to the monoclinic crystal system, and its space group is [space group number missing]. C 2 / c The unit cell parameters are a = 6.3036(5) Å, b = 12.2182(10) Å, and c = 4.5611(4) Å. α = gamma =90°, β =122.261(3)°, unit cell volume is 297.06(4) Å. 3 It exhibits a birefringence of 0.22 at 1064 nm, a large band gap, and an ultraviolet absorption edge of approximately 215 nm. The crystal is grown using vacuum tube sealing or hydrothermal methods. It possesses good chemical stability and can be used as a polarizing beam splitter or optical element in the infrared-visible-ultraviolet bands, finding applications in all-solid-state lasers.

The application provides a heating and cleaning method for low-grade scheelite rough concentrate, which comprises the following steps: concentrating the scheelite rough concentrate to 50-70wt%, pumping it into a stirring barrel and inputting steam for heating; heating the scheelite rough concentrate to 85-95 DEG C, adding sodium hydroxide, water glass and molecular sieve activated powder in sequence under stirring condition, continuing to heat and stir for 25-45 min, and removing the collector on the surface of calcium-containing gangue minerals; after the removing process is completed, adding normal-temperature water to dilute the scheelite rough concentrate to 20-30wt% and then feeding it into a flotation system, and obtaining scheelite concentrate through one-time roughing, two-time cleaning and three-time scavenging processes; wherein the roughing and cleaning processes adopt a flotation column, and the scavenging process adopts an aerated agitation type flotation machine. The heating and cleaning method for low-grade scheelite rough concentrate provided by the application can ensure the grade of the scheelite concentrate, can take into account the recovery rate of the scheelite ore, and can reduce the production cost.