259results about How to "Improve flotation efficiency" patented technology

The invention discloses a novel lepidolite flotation method including primary rough selection, secondary fine selection and secondary scavenging. During the flotation, sodium silicate is added as an inhibitor with the amount ranging from 1400g/t to 1900g/t; an anionic collector is sodium oleate or oxyparaffin soap 731 with the amount ranging from 480g/t to 700g/t; and a cationic collector is dodecylamine or coconut oil amine with the amount ranging from 130g/t to 160g/t. The adding sequence of collectors is the anionic collector first and the cationic collector second, or the anionic collector and the cationic collector are added together. By the method, the lepidolite is selected through the combination of the anionic and the cationic, good flotation effect can be realized, flotation efficiency is high, and meanwhile, the synergistic effect is generated between the anionic collector and the cationic collector, and results from joint action of three mechanisms of coadsorption, charge compensation and function complementation.

A structural formula of a 6-aliphatic hydrocarbon amido hexyl hydroximic acid collecting agent is represented by a formula (I), wherein R represents C2-C18 aliphatic hydrocarbon group. The preparation method comprises the steps as follows: caprolactam and hydroxylamine hydrochloride or hydroxylamine sulphate are taken as raw materials, methylbenzene is taken as a solvent, the reaction temperature ranges from 80 DEG C to 110 DEG C, the reaction lasts for 1-4 hours, and 6-amino hexyl hydroximic acid is generated; 6-amino hexyl hydroximic acid reacts with C2-C18 fat carboxylic acid at the reaction temperature ranging from 100 DEG C to 160 DEG C for 1-4 hours to generate 6-aliphatic hydrocarbon amido hexyl hydroximic acid, and the product yield can be higher than 91%; and 6-aliphatic hydrocarbon amido hexyl hydroximic acid used in flotation of scheelite, wolframite, tombarthite ore, tin ore, bauxite, titanic iron ore or fluorite ore is taken as the collecting agent, so that the flotation recovery rate can be increased by 3%-10%.

The invention discloses a high-grade potassium chloride production system and a method thereof. The system comprises a raw ore screening and concentrating system, a size mixing system, a floatation system, a low sodium concentration and dehalogenation system, a cold crystallization and thick potassium screening system, a thick potassium concentration and dehalogenation system, a refined potassium washing and dehalogenation system, a piling and filtering storage stock ground system, a breaking and conveying system and a drying cooling, packing, stacking and line crossing conveying system, and all the systems are sequentially connected and are arranged in a three-dimensional mode. Materials enter a next system in a self-flowing mode. An automatic dosing, automatic water adding and dehalogenation device is adopted, a spiral screen type centrifugal machine is used for replacing a horizontal belt type filter, and other technology improvements are adopted, so that the potassium chloride grade is improved to 98 percent from 95 percent, the piling and filtering technology is adopted in the system so that the natural gas using amount can be saved, production operation is convenient, and equipment operation is stable.

The invention discloses a lepidolite floatation method. The lepidolite floatation method comprises the steps that raw ore is subjected to wet ball milling after being crushed to obtain ore pulp; and the ore pulp is subjected to floatation separation with a lauryl amine polyoxyethylene ether solution serving as a collecting agent and with sulfuric acid serving as a regulating agent to obtain high-quality lepidolite concentrate. The lepidolite floatation method has the characteristics of being simple in process, low in agent consumption and production cost and good in adaptability to slime, the recovery rate of the lepidolite concentrate reaches 66.38% relative to Li2O in the raw ore, the content of lepidolite concentrate grade Li2O reaches 3.17%, the concentration ratio reaches 4.80, comprehensive utilization value of lepidolite resources is remarkably improved, and the floatation method is environmentally friendly and has sustainable-development long-term and practical significance.

The invention relates to phosphorite double-reverse flotation process, which comprises reverse flotation de-magging, desliming and pulp mixing and reverse flotation desilicication. The phosphorite double-reverse flotation process is characterized in that ore pulp after reverse flotation de-magging realizes desliming, the concentration of a desliming bottom flow and the content of fine particles are controlled, and reverse flotation desilicication is realized after pulp mixing of the bottom flow. The phosphorite double-reverse flotation process can eliminate or mostly remove interference of slime to reverse flotation desilicication, increases flotation efficiency, more importantly, improves fluidity of flotation foam, and lead phosphorite double-reverse flotation to be engineered.

The invention discloses a column combined reinforced high-efficiency flotation method and flotation equipment thereof. The method comprises four processes, namely strong turbulence mineralization realized by a raw ore through mechanical stirring, static flotation realized by settled sands through counterflow mineralization, weak turbulence separation realized by bubbles through a rectification effect, as well as concentrate secondary enrichment and accurate scraping realization. In the flotation equipment, a bracket is arranged on the top of a cylinder body, a flat scraper is arranged on the lower side of the bracket; a feed pipe is arranged on a position in lower middle of the cylinder body; the outlet end of the feed pipe is connected with the lower end of a false bottom; the false bottom is connected with a rectification plate; an annular inflating pipe is arranged on the lower part of the cylinder body; a monomer rectification plate is connected to the inner wall of the cylinder body; a sleeve is sleeved outside a hollow shaft; and an impeller is connected with the lower end of the hollow shaft. By integrating the advantages of strong mineralization effect of a flotation machine and better separation environment of a flotation column, the defects of high turbulence degree of the traditional flotation machine and insufficient mineralization of the traditional flotation column can be overcome, reinforced high-efficiency flotation is realized, and adaptability to the flotation process is stronger. The column combined reinforced high-efficiency flotation method and the flotation equipment thereof can be applied to separation operation of coals, chemical minerals and the like.

The invention relates to a floating method of sulfide-oxide mixing Pb-Zn mine. The lead floating method adopts the flow process of one fast separation, one roughing separation, one sweeping separation and three classifications so that the mine grouting acidity of the full floating process can keep at pHú¥11. The zinc floating method adopts the flow process of one fast separation, one roughing separation, one sweeping separation and two classifications so that the mine grouting acidity of the full floating process can keep at pHú¥12. It can increase the recovery ratio of PbíóZn over 10% when Pb-Zn mine has oxide ratio over 30%.

The invention relates to a floatation column used for mineral separation, which is characterized in that: the floatation column comprises a column body, the interior of the column body is divided into a concentrated mineral collecting tank, a separation bucket and a tail discharge box in sequence from top to down; more than one concentrated mineral discharge ports are opened on the concentrated mineral collecting tank and provided with an electromagnetic valve used for regulating the liquid surface of the discharge of the concentrated mineral; the separation bucket comprises a middle static micro-bubble separation section and a lower cyclonic separation section, and is connected with an external inflator pump and internally provided with a cyclone in the column; the tail discharge port at the bottom of the tail discharge box is provided with an automatic discharge valve linked with the concentrated mineral discharge electromagnetic valve. The invention is a floatation column used for mineral separation which has the advantages of simple and compact structure, low cost, high efficiency and energy conservation, small land occupancy, long service life, rapid floatation speed and large processing capability.

The invention provides a floating technology for low-grade refractory weathering collophanite section desliming. The technology comprises the steps that after coarse crushing and fine crushing are carried out on raw ore, a surface treating agent is added, and the raw ore is subjected to washing in an ore washer; washed pulp enters a shaking table to be subjected to a first-section desliming, coarse particle minerals are subjected to next desliming, and fine silt serves as slurry and is processed; the ore grinding treatment is carried out on the coarse particle minerals, ore grinding pulp is subjected to second-segment desliming, deslimed pulp is subjected to the positive and negative floating operation, and floating concentrate and floating tailings are obtained; after concentrating and filtering are carried out on the floating concentrate, a phosphorus concentrate product and concentrate backwater are obtained, the concentrating and the filtering are carried out on positive floating tailings and negative floating tailings, a tailings product and tailings backwater are obtained, deslimed two-section slurry is subjected to the concentrating and the filtering, and a slurry product and slurry backwater are obtained; according to needs, the concentrate backwater, the tailings backwater and the slurry backwater are back to the floating operation and backwater points of the ore washer to be subjected to recycling. The phosphorus concentrate quality can be improved, and the resource utilization of the low-grate collophanite is achieved.

A sulfide flotation collector is chemically named dialkyloxycarbonyl bisthionocarbamate and has a general molecular formula shown as formula (I). In the formula, R1 represents alkyl, aryl or aralkyl of C1-C8 and R2 represents alkylene of C2-C6 or ether-containing alkyl with the general formula being -R3-(OR4)n-, wherein R3 and R4 are respectively ethylidene or propylidene, and n is equal to 1-3. A preparation method of the sulfide flotation collector is characterized in that N-alkyloxycarbonyl isothiocyanates and a diol compound are subjected to addition reaction for 2-10h under reaction temperature of 20-80 DEG C. The synthetic method is simple and convenient. Being used as the sulfide collector, the compound with the structure of the formula (I) can efficiently recover valuable metal ores from the sulfide ores and the sulfide ores of associated precious metals and has the characteristics of high flotation efficiency and metal recovery, etc. The invention also relates to the preparation method of the collector.

A process for removing Mg from phosphorus ore in order to prepare phosphoric acid by wet method features use of static microbubble floatation column, and includes such steps as breaking the crude phosphorus ore, grinding, classifying, mineralizing by mixing the reverse floatation chemical with ore sludge, and floatating in said static microbubble floatation column while conditioning the ore sludge to obtain the bubble-phase tailings and low-Mg phosphorus ore concentrate from the column bottom.

The invention discloses a flotation promoter of coal slime. The flotation promoter comprises the following materials in percent by weight: 40%-70% of a gemini surfactant, 20%-40% of a polyoxyethylene ether surfactant and 0%-20% of an aliphatic ester surfactant. The invention also discloses a method for preparing a flotation reagent from the flotation promoter of the coal slime. The flotation promoter disclosed by the invention has the advantages that since a novel surfactant-bisamide diester group non-ionic gemini surfactant is mainly adopted as a main component, not only can the flotation effect be obviously improved, but also the used quantity of the flotation reagent can be reduced, the adaptability to different coal types and different flotation reagents is strong, the problem of poor cooperativity of the promoter to different flotation reagents in the prior art is solved, the emulsification is not needed, the defects in the prior art that the emulsification is required to be carried out in advance, even the original flotation process is changed and the operation is fussy are overcome, so that the purposes of reducing the reagent consumption and improving the flotation efficiency are achieved.

The invention relates to a separation process of non-metallic minerals, in particular to a method of recovering mica from tailings of clean mill in metal mines. After getting rid of single minerals and cuttings of over 100 meshes by a hydrocyclone or a chute, tailing powder that contains mica is mixed to slurry with the concentration of 20% to 40%, is added in sequence with inhibitor, regulator and collector, and is poured into a flotation cell for flotation after fully churning. The method needs no predesliming, mica of over 90% purity can be acquired by one separation, 99% purity can be acquired by twice separation, the flotation efficiency is high, the technique is simple and the cost is low.

The invention relates to a method for preparing a compounded collecting agent of vegetable fatty acid diethanolamide ester soap. The method comprises the following steps of: 1) performing amide esterification reaction on fatty acid with an iodine value of 85 to 135 and diethanolamine, performing saponification reaction on an obtained reaction product and 30 mass percent of sodium hydroxide solution, and thus obtaining fatty acid diethanolamine and a fatty acid soap mixture thereof; 2) performing the saponification reaction on raw materials such as the fatty acid with the iodine value of 120 to 135 and sodium hydroxide or sodium carbonate, and thus obtaining fatty acid soap; and 3) mixing the fatty acid diethanolamine and the fatty acid soap mixture thereof obtained in the step 1) with the fatty acid soap obtained in the step 2) to obtain fatty acid diethanolamide ester soap, compounding a surfactant into the fatty acid diethanolamide ester soap, and thus obtaining the compounded collecting agent of the vegetable fatty acid diethanolamide ester soap. By adoption of the method, phosphorus selectivity is obviously improved, flotation temperature is reduced, floatation efficiency is high, and the raw materials are easy to purchase and low in cost.

The invention discloses a preparation method of high grade copper oxide concentrate. The preparation method sequentially comprises complex copper oxide crude ore grinding, copper sulphide flotation and copper oxide flotation. The copper oxide flotation comprises rough flotation and fine flotation, wherein the rough flotation includes that flotation reagents are added into tailings of copper sulphide flotation after the copper sulphide flotation, and rough concentrate and rougher tailings are obtained after mixing, stirring and separating. The fine flotation includes that gangue mineral depressants are added into the rough concentrate to be stirred, and the gangue mineral depressants are halogenate ethyl sodium sulfonate. According to the preparation method, in the fine flotation process, the halogenate ethyl sodium sulfonate is added to serve as the depressants, impurity gangue minerals are water loving, and therefore the separating effect of target minerals and the impurity gangue minerals is improved in the fine flotation process. The method drastically reduces contents of silica, calcium oxide, magnesium oxide and other impurity gangue minerals, and obtains the high grade copper oxide concentrate. The mineral processing process is low in cost, and simple and feasible in operation.

The invention relates to the field of coal slurry mixing and flotation treatment, and specifically relates to swinging-stirring flotation equipment with a self-slurry-mixing function. The swinging-stirring flotation equipment disclosed by the invention at least comprises a flotation cell, wherein a micro-bubble generation bed is arranged in the flotation cell; the micro-bubble generation bed comprises micro-bubble tubes; and a connection arm is arranged at each of the two ends of each micro-bubble tube to fix the co-end part of the micro-bubble tube. The equipment further comprises a gas pipeline, wherein the gas pipeline is communicated with the tube cavity of each micro-bubble tube through a prearranged gas channel in the corresponding connection arm; and micro-bubble generation holes used for ejecting a gas are densely distributed in the tube wall of each micro-bubble tube. The equipment further comprises power arms, wherein the two power arms are provided, and symmetrically arranged at the two sides of the micro-bubble generation bed; and a stirring baffle extends from the bottommost end of each micro-bubble tube, and the surface of each stirring baffle is vertical to the swinging direction of the micro-bubble generation bed. The equipment disclosed by the invention has the advantages of being great in micro-bubble flotation effect, easier in bubble mineralization, free from flotation 'dead areas' in the flotation cell, and more stable in foam layer; and the working efficiency and the flotation effect can both be effectively ensured.

The invention discloses a quaternary ammonium salt cationic collector and a synthesis method of the quaternary ammonium salt cationic collector. The prepared quaternary ammonium salt cationic collector is mainly used for collophane reverse floatation desilication. A preparation technology comprises the two steps of: synthesizing an intermediate containing chlorine and hydroxypropyl by taking C1-C4 tertiary amine, hydrochloric acid and epoxy chloropropane as raw materials, and allowing the synthesized intermediate to react with hexamethylenediamine under alkaline conditions to prepare the quaternary ammonium salt cationic collector. The synthetic route of the collector is simple, a raw material source is wide, the prepared collector is stable, has good water solubility, is convenient to use, and has the advantages of good selectivity, strong collecting force and the like in the collophane reverse floatation desilication.

The invention relates to a separation-flotation technology of rough sand and secondary slime of vein gold ores. The separation-flotation technology is especially and mainly applied to ore dressing of the quartz vein type ores of gold-carrier ores, mainly iron pyrites. The separation-flotation technology includes the following steps of ore grinding grading operation, rough sand flotation operation, secondary slime flotation operation and combining forming operation of total gold ore concentrate. The recovery rate of gold of the obtained total gold ore concentrate is larger than or equal to 95.46%, the recovery rate of the gold is obviously improved, the use efficiency of resources is improved and the separation-flotation technology is small in use amount of medicaments and reduces environment pollution.

The invention provides application of acyl amino polycarboxylic acid/hydroximic acid like compound in mineral flotation. A structural formula of the acyl amino polycarboxylic acid/hydroximic acid likecompound is shown as a formula (I); (shown in the description) wherein R in the formula (I) represents aliphatic hydrocarbyl of C<6>-C<18>, n=1-3, and M1, M2, M3 and M4 are separately selected from one or several of -OH, -ON, -OK, -NHOH, -NHON or -NHOK. And n<1>=1-3, n<2>=1-3, and n<3>=1-3. The acyl amino polycarboxylic acid/hydroximic acid like compound is used as a collecting agent to enhance the chelation and recognition action on metal oxidized ores, facilitate ordered arrangement of the collecting agent on the mineral surface, effective flotation recovery is carried out on tungstenores, rare earth ores, tin ores, lithium ores, phosphorus ores, manganese oxide ores, cooper oxide ores, fluorites or titanium iron ores, the acyl amino polycarboxylic acid/hydroximic acid collectingagent has the advantages of high collecting capacity, high selectivity, low ton ore use amounts and the like, and is especially suitable for processing difficultly selected fine grain ores.

The invention provides a hydrocarbon amide-bi-hydroxamic acid compound and application thereof in mineral flotation. The structural formula of the hydrocarbon amide-bi-hydroxamic acid compound is as shown in the description, wherein R represents an aliphatic hydrocarbon group of C2 to C18, and n ranges from 1 to 10. The hydrocarbon amide-bi-hydroxamic acid compound serving as a collector can enhance the chelation and recognition to metal oxidized ores, promote the ordered arrangement of the collector on a mineral surface and effectively recover tungsten ores, rare earth ores, tin ores or ilmenite by flotation, has the advantages of strong collecting capacity, high selectivity, low consumption of tons of ores, etc., and is especially suitable for processing hard dressing fine grained ores.

The invention provides a floatation separation technology of refractory lead-zinc sulphide ores. The floatation separation technology comprises the steps that rough grinding is conducted on the lead-zinc sulphide ores, a pH regulator, a collector and a foaming agent are added, so that lead-zinc bulk floatation is conducted and lead-zinc bulk concentrates are obtained; and fine grinding is conducted on the lead-zinc bulk concentrates, a pH regulator, an electric potential regulator, an inhibitor and the like are added, so that lead ore floatation is conducted and lead concentrates are obtained,in the process, an electric potential of ore pulp is adjusted to be 210-350 mv by the electric potential regulator, and a pH value of the ore pulp is adjusted to be 9-11 by the pH regulator. A pH regulator, an activating agent and the like are added into lead ore floatation tailings, zinc ore floatation is conducted, and zinc concentrates and zinc ore floatation tailings are obtained. The lead-zinc floatation separation difficulty is reduced by adding the electric potential regulator, meanwhile waste water produced at various floatation stages is separated and independently recovered, the floatation separation technology is suitable for floatation separation of the lead concentrates and the zinc concentrates with high grades and recovery rates at low production cost from the refractory lead-zinc ores which are low in lead content and high in zinc content, and the application prospect is good.

The invention relates to a compound collecting agent for flotation of phosphorus ores, in particular to a method for preparation of a vegetable fatty acid and citric alkyl ester saponin compounded collecting agent. The method includes the steps: 1) subjecting alkyl alcohol and citric acid to esterification reaction to obtain a reaction product which is a citric alkyl ester surfactant; 2) adding vegetable fatty acid with iodine value being 135 into the citric alkyl ester surfactant obtained at the step 1), heating and well mixing; 3) adding the mixture obtained at the step 2) to sodium hydroxide solution to realize saponification, and well mixing to obtain the vegetable fatty acid and citric alkyl ester saponin compounded collecting agent. The method has the advantages that by utilization of the vegetable fatty acid and citric alkyl ester saponin compounded collecting agent, phosphorus selectivity is evidently improved, flotation temperature is lowered, and flotation efficiency is improved; in addition, easiness in purchase of raw materials, low cost, simple production lines, safety in production process and avoidance of irritating odors are realized, ore dressing cost is reduced, and defects in the prior art are overcome.