277 results about "Reverse flotation" patented technology

The invention relates to the technical field of beneficiation of copper cobalt oxide ores, and discloses a flotation method for high-calcium-magnesium copper cobalt oxide ores and a combined collecting agent. The positive and negative mixed flotation technology is adopted, a combined collecting agent composed of oxidized paraffin soap, sodium oleate and divalent metal cations is adopted in the reverse flotation process, the total recovery rate of copper and cobalt reaches 90% or above, and the leaching acid consumption is 20-60 kg / t.feeding ore. The combined collecting agent adopted by the method is small in dosage, good in collecting performance and small in toxicity, compared with an existing copper oxide cobalt ore flotation technology, the method can improve the copper and cobalt recovery rate by 10% or above, leaching acid consumption is remarkably reduced, the production cost is remarkably reduced, the technological process is simple, and industrial application and popularization are easy.

The invention discloses a magnetic separation-flotation combined stepped deep iron removal method for granite tailings. According to the method, after granite tailings are subjected to ore grinding treatment, magnetic separation impurity removal, black and white mica ore removal through reverse flotation and fine ferrodolomite ore removal through reverse flotation are conducted in sequence, after the pH of reverse flotation tailings is adjusted, fluoride-free and acid-free separation is conducted, low-iron quartz concentrate and feldspar rough concentrate are obtained, the feldspar rough concentrate is subjected to regrinding and secondary magnetic separation impurity removal, and the low-iron quartz concentrate and the feldspar rough concentrate are obtained. And low-iron feldspar concentrate is obtained. According to the method, no strong acid is involved in the whole process, the technical problem that in the prior art, strong acid is introduced in quartz and feldspar flotation, and consequently waste water and waste liquid pollution is caused is fundamentally solved, and efficient and deep removal of iron impurities in the granite tailings is achieved through the magnetic separation pre-enrichment-three-section flotation separation-step deep iron removal technology. And the overall removal efficiency of the iron impurities is remarkably improved, and comprehensive utilization of granite tailings resources is achieved.

The invention provides a method for quality-divided regeneration of silicon dioxide from ardealite by using a flotation and acid leaching coupling melting purification technology, and relates to the technical field of regeneration of silicon dioxide from ardealite, the method comprises the following steps: S1, adding a nonionic collecting agent into ardealite ore pulp for reverse flotation to obtain rough machining ardealite; s2, carrying out direct flotation on the rough machining ardealite obtained in the step S1 to obtain silicon ardealite tailings; s3, drying and crushing the silicon phosphogypsum tailings, uniformly mixing the silicon phosphogypsum tailings with a washing agent, and acidizing to remove impurities, so as to obtain silicate; and S4, adding the silicate obtained in the step S3 into a dissolving agent, reacting to obtain silicon dioxide colloid, and calcining to obtain silicon dioxide with the purity as high as 99.9%.

The invention discloses a magnetic suspension combined beneficiation method for micro-fine particle low-grade refractory magnetite, which comprises the following steps: first-stage ore grinding, first-stage grading and low-intensity magnetic separation are carried out, the obtained first-stage low-intensity magnetic separation concentrate is subjected to second-stage pre-grading, second-stage ore grinding, low-intensity magnetic separation and magnetic separation column I separation, and the obtained magnetic separation column I concentrate is subjected to reverse flotation operation; one-time roughing, one-time scavenging and three-time concentration are adopted in reverse flotation operation, products in a groove after third-time concentration are final iron ore concentrate, tailings of a magnetic separation column I and flotation scavenging tailings are fed into a magnetic separation column II to be subjected to three-section pre-classification, three-section ore grinding, low-intensity magnetic separation and separation, and the tailings of the third-section low-intensity magnetic separation, the tailings of the first-section low-intensity magnetic separation and the tailings of the second-section low-intensity magnetic separation are mixed to be final tailings. The final tailings are used as an iron correcting agent for producing the iron-containing Portland cement. The method has the advantages of being high in iron ore concentrate grade, small in flotation feeding amount, high in flotation feeding grade, stable in index, easy and convenient to produce and maintain, high in adaptability and the like.

The invention aims to provide an inhibitor for reverse flotation of micro-fine-particle hematite and a use method of the inhibitor, aiming at the problem that the micro-fine-particle hematite cannot be effectively inhibited by an existing iron ore reverse flotation process technology. According to the inhibitor, AMPS (2-acrylamido-2-methylpropanesulfonic acid) is subjected to chemical modification in a weakly alkaline solution, a product AMPS (OH <->) is generated, then in hematite flotation operation, the hydrophilicity of micro-fine particle hematite is improved, the flotation performance difference of hematite and silicate minerals is effectively increased, and efficient removal of the silicate minerals is facilitated. In addition, the modified inhibitor AMPS (OH <->) has the characteristics of strong selectivity, small dosage, simple preparation and the like, and can effectively reduce the content of silicon in the flotation concentrate of the micro-fine particle hematite, improve the yield and the recovery rate of the flotation concentrate and realize the target of efficient impurity removal of the micro-fine particle disseminated hematite.

The invention discloses a method for removing mica through quartz reverse flotation, and belongs to the field of high-purity quartz sand preparation, and the method comprises the following steps: adjusting the pH value of quartz sand ore pulp to 5.5-6.5, adding a quartz inhibitor sodium silicate into the quartz sand ore pulp, and stirring; and then adding a collecting agent amino fatty acid compound into the quartz sand ore pulp under the condition of air-blowing stirring, stirring, adding a foaming agent terpenic oil, carrying out reverse flotation, stirring, scraping foam, and washing to obtain the product high-purity quartz sand. According to the method, different adsorptions of quartz and mica are achieved through a novel collecting agent under the weak acid condition, and then the mica is removed through a specific reverse flotation method. The product quartz sand obtained after reverse flotation is high in purity, and the content of aluminum oxide impurities is reduced to 100 ppm or below.

The invention discloses a collecting agent capable of being used for quartz direct and reverse flotation and a preparation method and application of the collecting agent. The collecting agent consists of the following components in parts by weight: 1-5 parts of a cation collecting agent, 7-30 parts of an anion collecting agent and 10-25 parts of an emulsifier, the cation collecting agent is at least one of lauryl amine, coconut oil alkyl primary amine, octadecyl succinamide and daminozide; the anion collecting agent is at least one of oleic acid, oxidized paraffin soap, naphthenic acid soap, cottonseed oil soap, rosin soap and sodium dodecyl sulfate; the emulsifying agent is at least one of glycerol, Tween 80, isooctanol polyoxyethylene polyoxypropylene ether and tributyl phosphate. Based on the synergistic effect of all the components, the collecting agent can effectively modify the surface of quartz under the strong alkaline condition, hydrophobization of the surface of quartz ore is promoted, and therefore flotation separation of feldspar and quartz is achieved; the feldspar surface can be effectively modified under the strong acid condition, and whitening and purification of quartz concentrate are achieved.

The present invention provides a process for removing impurities from medium- and low-grade collophosphite, which first performs reverse flotation to remove magnesium after grinding, then performs gravity separation, and finally performs reverse flotation to remove silicon to obtain phosphate concentrate. After the powder ore is ground and heated, dolomite is preferentially removed by reverse flotation, reducing the content of fine and micro-grained gangue minerals entering gravity separation, improving the efficiency of spiral chute gravity separation to remove fine-grained iron-aluminum-silicate impurities, greatly reducing the content of fine-grained impurities entering the reverse flotation desiliconization process, greatly reducing the adverse effects of fine and micro-grained particles on reverse flotation desiliconization of cationic collectors, greatly exerting the desiliconization efficiency of cationic collectors, significantly improving flotation efficiency, and finally significantly reducing the content of aluminum, magnesium, and silicate in the phosphate concentrate.

The invention relates to the technical field of mineral separation, in particular to a method for reducing the content of sericite in porphyry type copper tailings. The method specifically comprises the following steps that reselection grading operation is conducted on the porphyry type copper tailings, and a coarse-fraction product and a fine-fraction product are obtained; the reselected fine-fraction product is fed into magnetic separation operation to remove ferromagnetic minerals; performing multi-channel flotation operation on the strong magnetic tailings to remove sulfide minerals; the obtained desulfurized flotation tailings are fed into reverse flotation operation after the ore pulp concentration and the pH value are adjusted, and the reverse flotation tailings are sericite products; in order to solve the problems that the content of micro-fine particle sericite in the porphyry type copper tailing dam is high, and the dam break risk hidden danger is increased, the reselection-magnetic separation-desulfurization flotation-reverse flotation combined process is adopted, the recovery rate of the sericite in the copper tailings is 26%-30%, the content of the sericite in the tailings is greatly reduced, and the safety of the dam body is improved.

The invention discloses a separation reagent for promoting flotation of iron ore and associated iron-containing silicate, which is used for adsorbing excessive Ca < 2 + > ions in flotation circulating water and selectively separating specularite and chlorite for reverse flotation. The agents are sequentially added in a proper pH environment and are subjected to reverse flotation operation, floatability difference between iron ore and iron-containing silicate can be effectively promoted, redundant Ca < 2 + > in flotation circulating water is reduced, and the quality of iron ore concentrate can be improved through a reverse flotation means. Compared with the prior art, the flotation agent has the advantages that the flotation agent is high in flotation environment applicability, good flotation performance can be kept in a common environment with the pH being 6-8, meanwhile, the excellent separation effect can be achieved under the low-dosage condition, and the phenomenon that Ca2 + ions are excessive due to the fact that mining filling bodies fall and are mixed into concentrate can be effectively improved. Compared with single use of traditional iron ore inhibitor starch and dextrin, the method has the advantages that better iron ore concentrate indexes can be obtained through a reverse flotation means by using a pre-adsorption agent system, and meanwhile, the phenomenon that excessive Ca < 2 + > ions are entrained and dissolved out from concentrate gangue is further reduced.

The invention belongs to the technical field of beneficiation of vanadium-containing minerals, and discloses a beneficiation method for removing calcium and enriching vanadium from vanadium-containing shale through gravity-flotation combined separation, which comprises the following steps: S1, crushing raw ore, adding water and ball-milling to prepare ore pulp, and carrying out gravity separation on the ore pulp through a spiral launder to obtain a coarse-grained vanadium ore product and a fine-grained vanadium ore product; s2, water is added into the coarse-fraction vanadium ore product for size mixing, reverse flotation operation is carried out, and vanadium concentrate I and tailings I are obtained; s3, the fine-fraction vanadium ore product is firstly subjected to desliming treatment, vanadium concentrate II and deslimed minerals are obtained, water is added into the deslimed minerals for size mixing, then direct flotation operation is conducted, and vanadium concentrate III and tailings II are obtained; and S4, the vanadium concentrate I, the vanadium concentrate II and the vanadium concentrate III are combined to obtain final concentrate, and the tailings I and the tailings II are combined to obtain final tailings. The method has the characteristics of high V recovery rate, good Ca separation effect, simple process and environmental friendliness.

A magnetite-hematite micro-fine refractory iron ore separation method, comprising the specific steps: 1) performing crushing and screening on micro-fine-particle magnetite-hematite mixed raw iron ore and performing grinding and screening on same to obtain an ore grinding product; 2) performing weak magnetic and strong magnetic grading operation on the ore grinding product to obtain magnetic separation concentrate and magnetic separation tailings; 3) performing nanobubble pretreatment on a flotation reagent and then adding the pretreated flotation reagent to the magnetic separation concentrate to obtain the flotation feed mineral slurry; and 4) performing ultrasonic pretreatment on the flotation ore feeding slurry, and then performing reverse flotation closed-loop operation to obtain reverse flotation concentrate and reverse flotation tailings.

The invention discloses a combined collecting agent and application of the combined collecting agent in reverse flotation desilicication of potassium feldspar, and belongs to the technical field of mineral processing engineering. The combined collecting agent is composed of sodium oleate and hexadecyl trimethyl ammonium chloride. When the total dosage of the agent is 1 * 10 <-4 > mol / L to 6 * 10 <-4 > mol / L, the pH value is 10.0, and the molar ratio of hexadecyl trimethyl ammonium chloride to sodium oleate in the combined collecting agent is 1: 3-1: 2, efficient reverse flotation separation of the potassium feldspar and the quartz can be achieved. The combined collecting agent has the advantages of being high in collecting capacity, low in production cost, small in agent dosage, good in selectivity, environmentally friendly, safe and the like, and the separation effect and the economic benefit are both considered. According to the method, the sodium oleate and hexadecyl trimethyl ammonium chloride combined collecting agent is used for flotation separation of the potassium feldspar and the quartz.

The invention discloses a method for separating aluminosilicate minerals and purifying quartz sand under a neutral condition and application of the method. The method for separating the aluminosilicate minerals and purifying the quartz sand under the neutral condition adopts one or more reverse flotation operation, and the reverse flotation operation comprises the following steps: adding a quartz inhibitor into quartz raw sand ore pulp or high-quality quartz sand ore pulp with low aluminum content obtained by the last reverse flotation operation, and uniformly mixing; then adding an aluminosilicate mineral collecting agent, and uniformly mixing; then adding a foaming agent under the condition of air-blowing stirring, carrying out quartz reverse flotation, and keeping stirring and scraping bubbles during the process; and after the reverse flotation is finished, washing the residual ore pulp to obtain high-quality quartz sand with low aluminum content. The reverse flotation technology is carried out under the neutral condition, traditional strong acid and strong alkali are prevented from being used, and therefore the harm of the purification technology to production equipment, the ecological environment and operators is reduced.

The invention discloses a combined beneficiation process for weathering crust type high-mud-content magnetic, red and brown mixed iron ore, which comprises the following steps: carrying out crushing, dry screening, ore washing, high-pressure roller milling and wet screening on raw ore to obtain selected products with qualified granularity, and carrying out low-intensity magnetic separation on the selected products to obtain magnetic separation iron ore concentrate and low-intensity magnetic separation tailings; the low-intensity magnetic separation tailings are subjected to high-intensity magnetic separation, rotational flow classification and chute gravity separation to obtain gravity separation iron ore concentrate, chute gravity separation tailings and rotational flow classification overflow and high-intensity magnetic scavenging tailings, and the chute gravity separation tailings are subjected to ore grinding classification and high-intensity magnetic roughing to obtain high-intensity magnetic roughing concentrate and high-intensity magnetic roughing tailings; the strong magnetic roughing concentrate and the rotational flow grading overflow are combined and then subjected to reverse flotation, flotation iron concentrate and reverse flotation total tailings are obtained, and a reverse flotation collecting agent MX is a mixture of ether amine, ether diamine and quaternary ammonium salt according to the molar ratio of 1: (1.2-2.0): (1.5-2.5). The method has the advantages of being good in separation effect, stable and reliable in technological process, high in applicability, relatively low in mineral separation energy consumption and cost, extremely small in environmental pollution and high in comprehensive economic benefit.

The invention discloses a method for preparing high-purity quartz sand through reverse flotation, which comprises the following steps: S1, ore pretreatment: pretreating raw ore to obtain quartz sand; the quartz sand obtained in the first step is placed in a flotation tank, the mass concentration of ore pulp is adjusted to be 30%-60%, an adjusting agent is added into the ore pulp, the pH value of the ore pulp is adjusted to be 2-4, then an inhibitor is added, stirring is conducted for 3-5 min, a collecting agent continues to be added, stirring is conducted for 10-20 min, finally a foaming agent is added, air is introduced, reverse flotation is conducted, stirring, foam scraping and washing are conducted, and quartz sand concentrate is obtained; the inhibitor is modified starch with the particle size being smaller than 500 nm and the substitution degree being 0.1-1.0, the dosage is 50-250 g / t, and carboxyl and aldehyde groups are introduced into the modified starch; quartz sand concentrate obtained after flotation is subjected to secondary acid leaching and high-temperature chlorination to obtain high-purity quartz sand, modified starch serves as an inhibitor, meanwhile, hydroxyl (-OH) in starch molecules and the surface of quartz form hydrogen bonds, the surface of the quartz is covered, adsorption of a collecting agent to the quartz is hindered, and quartz loss is reduced.

The invention provides a precise separation method for high-power and half-high-silica phosphorite. The precise separation method comprises the steps of photoelectric separation pretreatment, selective crushing, ore grinding, screening and targeted flotation. The method comprises the following steps: carrying out photoelectric separation on high-power and half-high siliceous phosphorite to obtain photoelectric separation concentrates and photoelectric separation tailings, carrying out selective ore grinding on the photoelectric separation concentrates, and screening the particle sizes of ore grinding products to distinguish mineral products with different particle size distributions and impurity components. And finally, precise separation and enrichment of the high-power and half-high siliceous phosphorite are realized through targeted flotation. Multi-section double reverse flotation is adopted, and collaborative separation of multiple elements such as magnesium, silicon, iron and aluminum is achieved. Compared with a conventional double-reverse flotation process, the process has the advantages that mineralogical ore properties and the process flow are coupled, so that the flotation process has selectivity; the precise separation method provided by the invention has the advantages of stable beneficiation process flow, good separation effect, high concentrate recovery rate, high phosphate concentrate grade, low content of iron and aluminum sesquioxide in concentrate products and the like.

The invention discloses a beneficiation method for recovering iron ore concentrate from superfine hematite mud, which comprises the following steps: carrying out strong magnetic roughing on the superfine hematite mud to obtain strong magnetic roughed iron ore concentrate, and discharging strong magnetic roughed tailings; the strong magnetic roughing tailings are subjected to open-circuit strong magnetic scavenging twice, and first strong magnetic scavenging concentrate and second strong magnetic scavenging concentrate are obtained respectively; the strong magnetic roughing iron ore concentrate, the strong magnetic scavenging concentrate 1 and the strong magnetic scavenging concentrate 2 are combined and then fed into reverse flotation roughing operation, and the reverse flotation roughing operation is one-time roughing and three-time open-circuit scavenging. According to the method, full-open-flow fine sorting is adopted in strong magnetic separation and reverse flotation, strong magnetic roughing and scavenging bulk concentrates are subjected to flotation, reverse roughing and scavenging concentrates are combined into total concentrates, under the condition that it is guaranteed that the iron grade of the iron concentrates is larger than 63.0%, the iron ore concentrate recovery rate is increased to the maximum extent, the full-flow recovery rate is 72% or above, and the iron ore concentrate recovery rate is increased to the maximum extent. The contradiction between improvement of the iron ore concentrate grade and great reduction of the recovery rate is solved to the maximum extent, and an unexpected technical effect is achieved.

The invention discloses an ardealite short-process flotation whitening method which comprises the following steps: S1, adding water into ardealite to form ore pulp, then adding a cation collecting agent, uniformly mixing, and then adding micro-nano bubbles to form to-be-floated ore pulp; and S2, the to-be-floated ore pulp formed in the step S1 is subjected to reverse flotation, and ardealite concentrate is obtained. According to the method, the micro-nano bubbles and the flotation technology are organically combined, hydrophobic and potential modification is conducted on the surfaces of the carbon-containing impurity particles through the cation collecting agent, the micro-nano bubbles can be adsorbed on the surfaces of the carbon-containing impurity particles through the electrostatic interaction, the carbon-containing impurity particles are promoted to form larger-size agglomerates, and therefore the apparent size of the carbon-containing impurity particles is increased. And the apparent size of the particles is increased to promote collision and adhesion with bubbles, so that the selectivity and recovery rate of the phosphogypsum are improved, and high-precision separation and whitening of the phosphogypsum are realized.

The invention discloses a collophanite gravity-flotation combined beneficiation backwater utilization method, which comprises the following steps: carrying out ore grinding and grading on collophanite, introducing into a reverse flotation magnesium removal process to obtain magnesium removal concentrate a and magnesium removal tailings b, carrying out gravity concentration on the magnesium removal concentrate a to obtain gravity concentration concentrate c and gravity concentration tailings d, and carrying out gravity concentration reverse flotation dealumination process on the gravity concentration concentrate c to obtain phosphate concentrate e and tailings f; and the direct utilization of the backwater refers to collecting the magnesium-removed tailings b, the phosphate concentrate e, the tailings f and the phosphate concentrate g, respectively thickening and filtering to obtain the backwater, feeding the backwater into a No.1 backwater pool, and directly returning the backwater to the processes of ore grinding, reverse flotation magnesium removal, reselection, reconcentration and reverse flotation dealumination for reuse. According to the method for utilizing the collophanite gravity-flotation combined mineral separation backwater, a process capable of reducing the treatment and utilization amount in the utilization of the separation backwater of the collophanite and impurities magnesium and aluminum contained in the collophanite is found, so that the backwater recycling in the whole process is realized, and the separation index of removing the impurities magnesium and aluminum from the collophanite is not influenced.

The invention relates to a reverse flotation collecting agent and a preparation method and application thereof, and belongs to the technical field of bauxite reverse flotation desilicication. The reverse flotation collecting agent has a chemical structural formula as shown in a formula (I): R1-NH-R2-NH2. In the formula (I), R1 and / or R2 comprises at least one of the following functional groups: a-CN3H4 functional group and a-SO3H functional group. A diamine group and-CN3H4 in the reverse flotation collecting agent can enhance the action with groups such as hydroxyl, silicon and oxygen on the surface of the aluminosilicate mineral, and the selectivity of the reverse flotation collecting agent is improved; the interaction between-SO3H and metal ions in hard water can be reduced, the hard water resistance is improved, the adaptability of the collecting agent in the hard water is improved, meanwhile, alkyl non-polar macromolecular chains in R1 and / or R2 strengthen the hydrophobicity of the surfaces of ore grains after the collecting agent acts, and the collecting capacity of the reverse flotation collecting agent is improved. Therefore, the reverse flotation collecting agent gives consideration to selectivity and adaptability to minerals.

The invention discloses a fluoride-free strong-acid-free reverse flotation method for extracting a high-purity quartz sand flotation product from granite pegmatite, and belongs to the technical field of mineral flotation. The method comprises the following steps: carrying out graded crushing and ore grinding on granite pegmatite to obtain slurry to be treated; carrying out wet magnetic separation on the to-be-treated slurry to obtain ore pulp after magnetic separation and magnetic-containing minerals; the pH value of the ore pulp is not adjusted, reverse flotation is carried out in the presence of a quartz mixed inhibitor, and a feldspar product and a quartz product are obtained; the quartz mixed inhibitor is a combination of a component A and a component B, wherein the component A is selected from at least one of sodium metasilicate, sodium tripolyphosphate, sodium hexametaphosphate, carboxymethyl cellulose and salinized water glass; the component B is selected from at least one of guar gum, Arabic gum, sodium humate and citric acid. The method is free of fluorine and strong acid, green and efficient, and is a method for preparing high-purity quartz sand from pegmatite with high industrial application feasibility.

The invention belongs to the technical field of phosphorite beneficiation, and particularly discloses a method for improving silicon-calcium collophanite double-reverse flotation froth, which comprises the following steps: adjusting the pH value of phosphorite pulp to be acidic by using oxalic acid, adding a magnesium removal collecting agent for reverse flotation magnesium removal to obtain magnesium-removed concentrate pulp, adding activated carbon into the magnesium-removed concentrate pulp, uniformly mixing, diluting the ore pulp, adjusting the pH value to be 6.5-8, and filtering to obtain the silicon-calcium collophanite double-reverse flotation froth. Adding the foam-inhibiting agent and uniformly mixing; and a cation collecting agent is added for dealumination and desiliconization reverse flotation, and ore pulp obtained after reverse flotation is subjected to solid-liquid separation, so that phosphate concentrate is obtained. According to the method provided by the invention, the pH is adjusted by adopting oxalic acid during reverse flotation magnesium removal, activated carbon is added into ore pulp after magnesium removal to mix an adsorption agent, and a foam inhibition agent is added; the physical and chemical properties of the surface of the foam can be changed, the half-life period of the foam is greatly shortened, and the beneficiation effect is ensured.

The invention discloses an efficient beneficiation method for niobium ore, and belongs to the technical field of beneficiation. The method comprises the steps that raw niobium ore is crushed and then subjected to weak magnetic treatment to remove strong magnetic iron ore, weak magnetic tailings are subjected to desliming treatment and then subjected to strong magnetic treatment, and strong magnetic concentrate and strong magnetic tailings are obtained; the strong magnetic concentrate is subjected to desilicication reverse flotation, and desilicication tailings are obtained; the desilicication tailings are subjected to dehydration, reagent removal and desliming and then subjected to niobium flotation I, and niobium concentrate I is obtained; the strong magnetic tailings are subjected to niobium flotation II, and niobium concentrate II is obtained; and after the niobium concentrate II is subjected to dehydration and reagent removal treatment, upgrading flotation III is carried out, and niobium concentrate III is obtained. According to the method, according to the mineral composition characteristics of the niobium ore, magnetic separation is firstly carried out, and different flotation methods are respectively adopted for magnetic niobium-containing minerals and non-magnetic niobium-containing minerals for enrichment of the niobium ore, so that not only is the total recovery efficiency of the niobium ore improved, but also the niobium concentrate grade is improved, and the reagent consumption is reduced.

The invention discloses a method for extracting iron and reducing impurities from vanadium-titanium-iron concentrate, and belongs to the technical field of mineral separation. In order to achieve the purpose of extracting iron and reducing impurities from vanadium-titanium-iron concentrate, the invention provides a method for extracting iron and reducing impurities from vanadium-titanium-iron concentrate. The vanadium-titanium-iron ore concentrate is subjected to iron extraction and impurity reduction treatment through the processes of demagnetizing, screening and grading, coarse grain closed-circuit tower grinding and magnetic separation, fine grain direct magnetic separation, coarse grain and fine grain magnetic separation concentrate mixing demagnetizing closed-circuit sand grinding and magnetic separation, magnetic separation concentrate reverse flotation and magnetic separation flotation tailing mixing magnetic separation scavenging. And reverse flotation is optimized, the content of intergrowth of titanomagnetite and gangue minerals in the concentrate is reduced, the high-grade vanadium-titanium-iron concentrate with the TFe increasing amplitude being large is obtained, the TFe grade is increased to 58.12%-61.12%, and the increasing amplitude reaches 4.63%-5.07%.

The application discloses a method for separating aluminosilicate minerals and purifying quartz sand under neutral conditions and application thereof. The method for separating aluminosilicate minerals and purifying quartz sand under neutral conditions adopts one or more times of reverse flotation operations, and the reverse flotation operation comprises the following steps: adding a quartz depressor into quartz raw sand slurry or low-aluminum-content fine quartz sand slurry obtained through previous reverse flotation operation and mixing; then adding an aluminosilicate mineral collector and mixing; subsequently, adding a foaming agent under the condition of air agitation and stirring, and performing quartz reverse flotation, during which, stirring is kept and bubbles are scraped; and finally, washing the remaining slurry to obtain low-aluminum-content fine quartz sand. The reverse flotation process of the application is performed under neutral conditions, avoids the use of traditional strong acid and strong alkali, and further reduces the harm of the purification process to production equipment, ecological environment and operating personnel.

The invention discloses a flotation method of low-grade phosphorite, which comprises the following steps: S1, grinding the low-grade phosphorite until the mass ratio of-0.074 mm is greater than 85%, and then mixing pulp; s2, the pH of the ore pulp is adjusted to 8-9, 200-500 g / t of a collecting agent xanthate, 240-300 g / t of an activating agent and 50-80 g / t of a collecting agent hydroximic acid are added for reverse flotation phosphorus extraction and iron removal operation, and iron-removed concentrate is obtained; s3, the pH of the concentrate product obtained in the step S2 is adjusted to be larger than 9.5, sodium silicate with the use amount being 1-2 kg / t and the modulus being 2.8-3 and a mixed collecting agent C1 with the use amount being 0.3-0.5 kg / t are added for first-stage direct flotation, then the mixed collecting agent C1 with the use amount being 1.5-2 kg / t is added for second-stage direct flotation, and dealuminated concentrate is obtained; and S4, the pH value of the concentrate product obtained in the step S3 is adjusted to 4-5, 200-300 g / t of WF-01 is added for reverse flotation, and magnesium-removed concentrate is obtained. The sulphide ore and the oxidized ore in the refractory phosphorite are collected and floated, removal of iron sulfide and iron oxide is achieved, and the quality and the recovery rate of the phosphate concentrate are remarkably improved.

The application belongs to the technical field of battery recycling, and discloses a flotation depressant, a preparation method and application thereof. The flotation depressant comprises catechol, an oxidizing agent and a weak acid buffer solution, and the pH value of the flotation depressant is 4-6.5. The catechol and the oxidizing agent are dissolved in the weak acid buffer solution to prepare the flotation depressant, the flotation depressant can selectively inhibit the flotation of the positive electrode material, and thus the positive electrode material and the negative electrode material are separated through reverse flotation. The flotation depressant is used for flotation to obtain the positive electrode material rich in cobalt, and the grade and the recovery rate of the positive electrode material are as high as 90% and 83% respectively. The preparation method of the flotation depressant is simple, the cost is low, the flotation depressant is friendly to the environment, and the flotation depressant has a good application prospect in industrial battery recycling.

The invention provides a flotation method for separating residual slope product titanium placer, and belongs to the field of beneficiation, the flotation method comprises the following steps: grinding a titanium placer flotation raw material until the titanium placer flotation raw material accounts for 60-70% by mass of-0.074 mm, preparing the titanium placer flotation raw material into ore pulp with the concentration of 25-30%, adding a gangue collecting agent for reverse flotation roughing, and separating to obtain a foam product and an in-tank product; a gangue inhibitor and an ilmenite collecting agent are added into a product in the groove for direct flotation roughing, and roughing rough concentrate and roughing tailings are obtained; the roughing rough concentrate is subjected to three times of concentration to obtain titanium concentrate; a gangue inhibitor and an ilmenite collecting agent are added into the roughing tailings for scavenging, and scavenged concentrate and scavenged tailings are obtained; and the foam product and the scavenging tailings are combined, and tailings are obtained. The reverse flotation desliming process is adopted, it is guaranteed that gangue minerals with good floatability in an ore sample are removed as far as possible, the adverse effect of the gangue minerals on ilmenite flotation is reduced, recycling of fine-fraction ilmenite is effectively enhanced, and the TiO2 recycling rate is increased under the action of the efficient inhibitor and the collecting agent.

The invention discloses a high-calcium vanadium-containing shale gravity-flotation combined vanadium enrichment beneficiation method. Raw ore is subjected to one-rough-one-fine reverse flotation to obtain concentrate and tailings; and the tailings are subjected to gravity separation through a spiral chute, low-calcium products in the coarse fraction and high-calcium products in the fine fraction are obtained, the low-calcium products in the coarse fraction are subjected to decalcification flotation, and obtained decalcified concentrate returns to raw ore to form a closed cycle. By adopting the method, the calcium oxide component in the high-calcium vanadium-containing shale is removed, and the grade of the vanadium raw material is effectively improved under the condition that the recovery rate of vanadium pentoxide is at a relatively high level, so that the acid consumption of decalcification in the vanadium extraction process is reduced. And the yield of the vanadium concentrate after mineral separation is about 50%, so that the smelting investment can be reduced by compressing the treatment capacity of smelting materials, and the purpose of reducing the production cost of a unit product is achieved.