38results about How to "Increased selective inhibition" patented technology

The invention discloses a gangue inhibitor and a beneficiation method of copper sulphide ore containing easily floated gangue minerals, belongs to the technical field of flotation, and solves the problem that gangue minerals have very adverse effects on flotation of copper sulphide ore. The gangue inhibitor comprises sodium polyacrylate, carboxymethyl cellulose, Arabic gum, sodium silicate, sodiumtripolyphosphate, anhydrous sodium sulfite, sodium lignosulfonate and anhydrous zinc sulfate. The method comprises the following steps: adding lime for ore grinding, and adding water for size mixing;sequentially adding a collecting foaming agent, an auxiliary collecting agent and a collecting agent into obtained ore pulp for roughing; adding a collecting agent into obtained roughing tailings, and scavenging for the first time; adding a collecting agent into the scavenging tailings, and carrying out secondary scavenging; sequentially adding pH regulator lime and the gangue inhibitor into an obtained roughing concentrate, and carrying out primary concentration; and adding pH regulator lime into an obtained primary concentration concentrate for secondary concentration. The gangue inhibitoris capable of reducing the floatability of gangue minerals greatly; the method is capable of improving the copper grade and the copper recovery rate of rough concentrate.

The invention discloses a beneficiation method for improving comprehensive recovery indexes of complex low-grade molybdenum polymetallic ores, and particularly relates to comprehensive recovery of valuable elements such as molybdenum, copper and sulfur in low-grade molybdenum ores. According to the method, the effective flotation separation of molybdenite, chalcopyrite and pyrite can be realized,and the comprehensive recovery indexes of the low-grade molybdenum ores are improved. The method comprises the following steps of primary ore grinding, molybdenum (molybdenite) flotation, secondary ore grinding (rough molybdenum copper concentrate regrinding), copper (chalcopyrite) flotation, and sulfur (pyrite) flotation. The method is stable and effective in reagent regime and beneficiation process flow and high in adaptability. By using the beneficiation method, high-quality molybdenite, chalcopyrite and pyrite are obtained from the complex, difficult-to-select and low-grade molybdenum polymetallic ore with associated copper/ sulfur, and the comprehensive recovery indexes of sulfide minerals are excellent. The adopted reagent is non-toxic and harmless, has little influence on the environment, and is an excellent beneficiation method.

The invention discloses an inhibiting agent capable of selectively inhibiting calcium-containing gangue minerals in scheelite ores, and belongs to the technical field of mineral processing engineering. The inhibiting agent is formed by reacting the mixture of metal salt 80 percent-90 percent and polycarboxylate compounds 10 percent-20 percent. As metal ions have a selective activation effect on the calcium active points of the calcium-containing minerals, the selective inhibition effect on the calcium-containing gangue minerals by the polycarboxylate compounds is enhanced, and the effect of the inhibiting agent is improved. The inhibiting agent can be used in ore slurry at normal temperature, the usage amount of the inhibiting agent ranges from 200 g/t to 300 g/t, and the inhibiting agent is suitable for recovering scheelite from ores by selectively inhibiting the calcium-containing gangue minerals such as fluorspar and calcite when scheelite gangue minerals are mainly the calcium-containing minerals (the fluorspar and the calcite).

The invention discloses a flotation separation agent system for copper-molybdenum mixed concentrates and application of the flotation separation agent system. The flotation separation agent system forthe copper-molybdenum mixed concentrates comprises a copper mineral inhibitor, a molybdenum mineral collector and a foaming agent in a copper-molybdenum flotation separation process. The copper mineral inhibitor comprises the following components in parts by weight: 3-7 parts of sodium hydroxide, 3-6 parts of hydrogen peroxide, 15-25 parts of sodium thioglycolate, 2-5 parts of pentasodium diethylenetriaminepentaacetate and a proper amount of water; the molybdenum mineral collector comprises the following components in parts by weight: 20-30 parts of kerosene and 5-10 parts of tert-dodecyl mercaptan; and the foaming agent is 2-hexanol. The inhibitor and the collector are high in selective adsorption capacity, the synergy performance is excellent, the activity of groups of the foaming agentis high, formed foams are crisp and compact, and the mineralization effect is good. According to the flotation separation agent system for copper and molybdenum, the floatability difference between molybdenum minerals and copper minerals in the complex copper and molybdenum mixed concentrates difficult to separate can be greatly improved, the mutual content of the copper and the molybdenum is effectively reduced, the separation index is excellent, adopted agents are nontoxic and harmless, and the influence on the environment is small.

The invention relates to a beneficiation method for mixed refractory tungsten ore. The beneficiation method comprises the following steps: (1) grinding crushed raw ore of scheelite and wolframite paragenic ore to obtain ore pulp; (2) when the pH value of the ore pulp is 7.0-9.0, an inhibitor, adding an activating agent lead nitrate and a collecting agent for mixed tungsten roughing, and respectively obtaining tungsten rough concentrate ore pulp and roughing tailing ore pulp; (3) performing mixed tungsten scavenging operation on the roughing tailing ore pulp twice to obtain tungsten scavenging tailings I; (4) carrying out weak magnetic iron removal operation on the tungsten rough concentrate ore pulp to respectively obtain a magnetic iron product and magnetic separation tailing ore pulp; (5) carrying out strong magnetic roughing and scavenging on the magnetic separation tailing ore pulp to respectively obtain a wolframite concentrate product and scavenging operation tailings; (6) performing dense dehydration on the scavenging operation tailings, and obtaining ore pulp with the concentration being 60%-70%; and (7) carrying out concentrated scheelite flotation operation on 60%-70% of ore pulp to respectively obtain scheelite concentrate and tungsten scavenging tailings II. The method provided by the invention effectively realizes effective separation and enrichment of wolframite and scheelite.

The invention discloses a regulator for direct flotation of diasporic bauxite and a using method thereof. The regulator is synthetic polycarboxylate, wherein a main component of the synthetic polycarboxylate is small-molecular-weight sodium polyacrylate (potassium polyacrylate). The using method of the regulator is that a bauxite grinding product with the alumina-silica ratio 3-5 and the particle size -0.074mm accounts for 80-90% when the direct flotation of the bauxite is performed, a potential of hydrogen (pH) value of a flotation system is controlled to be 9-11, the using amount of sodium oleate serving as collecting agent is 500-800g/t, and the using amount of the regulator is 60-80g/t. The regulator is applied to a bauxite direct-flotation desilicication process, the selective inhibition effect on silicon-contained ores can be enhanced, meanwhile the unavoidable ion (Ca2+, Mg2+ and the like) eliminating capacity is enhanced, and the bauxite direct flotation effect is improved.

The invention discloses a flavonoid derivative, which has structure formulas shown as a general formula (I) and a general formula (II) as in the description, wherein R1 is alkyl or cyclo alkane; R2 isalkyl or cyclo alkane; R1, R2 and nitrogen atoms form cycloaliphatic ring or heterocycle; R3 is alkyl or aryl or aralkyl; the value of n is 1 to 10. The invention also discloses a preparation methodand an identification method of the flavonoid derivative.

The invention discloses a carbon inhibitor in a lead-zinc sulfide ore flotation process and application thereof, and belongs to the field of sulfide ore flotation reagents. The structural formula of the carbon inhibitor is shown as the specification, wherein R is an oxygen-containing hydrophilic group, and n is 4-10. The carbon inhibitor provided by the invention takes nonylphenol as a carbon-philic group and uses polyoxyethylene ether and sulfo/carboxymethyl as hydrophilic groups, can effectively inhibit flotation of carbon when used for flotation of carbonaceous lead-zinc sulfide ore, the consumption of a collecting agent by carbon impurities is reduced, the carbon content in concentrate products is reduced, and the beneficiation index of lead-zinc concentrate is favorably improved.

The present invention provides a compound of formula (I) or the salt thereof:

The invention discloses a beneficiation method for carbon-containing lead-zinc sulfide ore, which belongs to the technical field of beneficiation. The method comprises the following steps: (1) grinding raw ore to obtain ore pulp with preset fineness; (2) adding a carbon inhibitor into the ore pulp subjected to ore grinding, and uniformly stirring to obtain ore pulp subjected to pulp mixing; (3) adding a collecting agent and a foaming agent into the pulp obtained after pulp mixing for lead flotation to obtain lead concentrate and lead flotation tailings; and (4) adding a carbon inhibitor into the lead flotation tailings, and carrying out zinc flotation to obtain zinc concentrate and tailings. According to the beneficiation method for the carbon-containing lead-zinc sulfide ore, the adoptedinhibitor has a high-selectivity inhibition effect, carbon-containing impurities can be efficiently selected and inhibited in lead and zinc sulfide flotation, and efficient enrichment and recovery oflead and zinc sulfide are conveniently achieved.