32results about How to "Efficient flotation separation" patented technology

The invention discloses a diester-based 2-thiocyanate ester derivate applied in sulphide flotation, and the preparation method thereof. Diester-based 2-thiourea (the formula one) or diester-based 2-ethionine ester (the formula two) is applied as a novel collector for high efficiently recycling valuable sulfide minerals from metal sulphide ores by floatation. The collector has wide pH range in ore magma, thereby having strong ability to collect copper sulphide minerals such as chalcopyrite, etc., lead sulfide minerals or zinc sulfide minerals activated by copper ions, nickel sulfide minerals as well as noble metal minerals such as gold, silver, etc., and having good selectivity to gangue sulphide minerals such as iron pyrites, pyrrhotite, etc.

The invention discloses a 6-aryl amido hexyl hydroximic acid collecting agent and preparation and application methods thereof. 6-aryl amido hexyl hydroximic acid represented by a formula (I) is taken as a collecting agent and utilized in flotation of tungsten ore, tombarthite ore, tin ore or bauxite, wherein R represents H or C1-8 alkyl. 6-aryl amido hexyl hydroximic acid and sodium hydroxide, potassium hydroxide or ammonium hydroxide are put into water to prepare an aqueous solution of 6-aryl amido hexyl hydroxyoximate; a flotation reagent is added for size mixing during an ore grinding and / or flotation process, the added reagent at least contains the aqueous solution of 6-aryl amido hexyl hydroxyoximate, and the dosage of 6-aryl amido hexyl hydroximic acid ranges from 100g / t to 3,500g / t; and useful metallic minerals are floated out through a froth flotation method, and the flotation recovery rate can be increased by 2%-5%.

The invention discloses a cationic flotation collector and a preparation method thereof. An organic silicon ammonium salt compound shown by a formula I is used as a collector for flotation of oxidized ore and salt ore. In the formula I, R1 is a C8 to C18 alkyl, R2 and R3 may be hydrogen atom, methyl or ethyl respectively, R4, R5 and R6 may be methyl, methoxy, ethyl or ethoxy respectively and X may be Cl or Br. The preparation method is to react fatty amine with organohalosilane at 0 to 80DEG C for 0.5 to 2 hours to form the organic silicon ammonium salt compound shown by the formula I. The organic silicon ammonium salt collector disclosed by the invention can be used in place of a fatty amine collector for removing silicon and purity in reverse flotation of oxidized ore such as aluminum ore and iron ore and for floating zinc oxide and floating and separating potassium chloride and sodium chloride. Compared with fatty amine collector, the cationic flotation collector has the characteristics of high collecting capacity, high selectivity, low use amount per ton of ore, convenience for use and the like.

The invention provides an application method of an aromatic dihydroximic acid compound to mineral flotation and belongs to the technical field of mineral flotation. The aromatic dihydroximic acid compound as shown in the formula I is used as a collecting agent in flotation of a fluorite ore, a rare earth ore, a tungstite, a wolframite or a tungstite and wolframite mixed ore. A formula I is as shown in the specification, wherein a hydroximic acid group is located on an o-position, a meta-position or a para-position of the hydroximic acid group on a benzene ring. When being used as the collecting agent, the aromatic dihydroximic acid compound is stronger in metal element chelating capacity and better in target mineral selectivity because double hydroximic acid groups, namely two mineral philic groups exist in a molecule of the aromatic dihydroximic acid compound; the two hydroximic acid groups are directly connected with the benzene ring to form a large conjugated structure, so that the electron cloud density is higher, the nucleophilicity of the aromatic dihydroximic acid compound and metal is strong, and the aromatic dihydroximic acid compound more easily undergoes chelation and coordination reactions with the metal as comparison with the hydroximic acid without the conjugated structure; and compared with the common flotation collecting agent in the prior art, the aromatic dihydroximic acid compound has the characteristic of effectively increasing the flotation efficiency, the metal recovery rate and the like.

The invention relates to a separating method of mixed plastics and belongs to the technical field of waste plastic recovery. The method includes subjecting mixed plastic particles to surface modification by dipping the mixed plastic particles into an aqueous solution containing a wetting agent until an adsorption amount of the wetting agent on surfaces of the mixed plastic particles is not less than 5 g / t, performing solid liquid separation, adding the obtained solid into an eluant, eluting for not more than 20 min, performing solid liquid separation to obtain solid that is eluted mixed plastic particles, and subjecting the eluted mixed plastic particles to floatation to obtain a single plastic with high purity. The method is high in separation efficiency, simple in operation, easily controllable and low in cost and facilitates large-scale industrial application.

The invention relates to the technical field of non-ferrous metal beneficiation, in particular to a non-copper sulphide ore inhibitor and application thereof. The non-copper sulphide ore inhibitor isprepared from the following components in parts by mass: 1-3 parts of xanthan gum, 1-2 parts of pectin and 1-2 parts of arabic gum. The non-copper sulphide ore inhibitor is simple in preparation, lowin cost and green and environment-friendly and has a quite high inhibition effect on molybdenite, galena, sphalerite, pyrite and other sulphide ores in the copper bulk concentrate. With application ofthe inhibitor, efficient flotation separation of chalcopyrite and other sulfide minerals can be achieved.

The invention discloses a high-magnesium sulfide ore flotation inhibitor with slow-release conversion function and an application thereof. The inhibitor is CaF2, BaF2 and other nano alkaline earth metal fluoride colloidal particles or high-activity natural alkaline earth metal mineral powder, and is used for flotation separation of high-magnesium sulfide ore, which can slowly release F- ion in theore pulp and the MgF2 thin film is preferentially formed on the surface of the magnesium-containing mineral, so that the surface of oxide gangue minerals such as magnesium oxide has a structure similar to that of MgF2, the surface electrical properties of magnesium-containing minerals is changed, magnesium-containing mineral is prevented from heterogeneously coagulating with sulfide minerals dueto electrostatic attraction, and the entrainment, encapsulation and agglomeration of gangue minerals are reduced, the high-efficiency inhibition of the oxide gangue mineral such as magnesium oxide canbe realized, the flotation separation efficiency of such as copper-cobalt-nickel sulfide minerals and magnesium-containing gangue minerals can be greatly improved.

The invention discloses a double-ligand collecting agent-ether double thiourea or ethionine ester thiourea composite-radical compound and preparation and application thereof. The ether double thiourea or ethionine ester thiourea composite-radical compound shown as a formula (I) is used as a collecting agent for metal ore flotation, wherein R1 refers to an acyl radical with the general formula of R3-C(=O)- or an ester group with the general formula of R4O-C(=O)-, R3 and R4 respectively refer to C1-C8 alkyl radicals, R2 refers to hydrogen or methyl, X refers to O or NH, and n refers to 1-6. The compound with the structure shown as the formula (I) is used as the flotation collecting agent to efficiently recover value metal from nonferrous metal ores and precious metal ores. Flotation separation and extraction of the nonferrous metal ores and precious metal ores can be enhanced by the ether double thiourea or ethionine ester thiourea composite-radical compound. The melting point of the collecting agent can be lowered, dispersity of the collecting agent in aqueous solution is improved, adsorption of the collecting agent on the surfaces of ores is promoted, and flotation efficiency is improved while metal recovery rate is increased.

The invention discloses a calcium-containing or silicate-containing gangue mineral flotation depressant and a preparation method and application thereof. The flotation depressant is formed by polymerizing an inorganic polymer and metal ions. The preparation method of the flotation depressant comprises the steps that diatomaceous earth and a sodium hydroxide solution react under a high-temperatureand high-pressure condition to obtain the inorganic polymer, and then polymerization reaction is carried out on the inorganic polymer and metal salt to obtain the flotation depressant. The method is simple and low in cost, the prepared flotation depressant has extremely strong selective depressing effect on the calcium-containing and silicate-containing gangue mineral so that high-efficiency flotation separation of a tungsten-containing mineral from the gangue mineral can be realized; and the use amount of a chemical agent is small, the cost is low, and the flotation index is stable so that the depressant and the method can be widely applied to the great improvement of the concentrate grade and the recovery rate in the tungsten ore flotation process.

The invention discloses a copper-based coordination polymer, a preparation method thereof and an application of the polymer serving as a gangue mineral inhibitor to copper-nickel sulfide ore flotation. Polyacrylic acid-carboxymethyl cellulose mixed anhydride and bivalent copper ions are coordinated and polymerized to obtain the copper-based coordination polymer. The copper-based coordination polymer can be effectively dispersed in solution and self-assembled to form colloidal particles loaded with strong negative charge on surfaces, so that the copper-based coordination polymer can be attachedto the surfaces of gangue minerals loaded with positive charged on the surfaces, and the gangue mineral is strongly hydrophilic. The copper-based coordination polymer is applied to copper-nickel sulfide ore flotation and has high selective inhibitory effects on the gangue minerals such as serpentines and quartz loaded with the positive charged on the surfaces, so that copper-nickel sulfide ores and the gangue minerals can be efficiently separated by flotation.

The invention discloses a double-ligand thiourea collecting agent, i.e., an N,N'-alkylenedioxycarbonyl-N'',N'''-dialkoxyl-propyl-dithiourea compound, and a preparation method thereof and an application of the double-ligand thiourea collecting agent in metal ore floatation. The application is characterized in that the N,N'-alkylenedioxycarbonyl-N'',N'''-dialkoxylpropyldithiourea compound which is shown as a formula (I) and is taken as a collecting agent is used for effectively floating and recovering valuable metal minerals from non-ferrous metal ore and noble metal ore. In the formula (I), R1 represents alkyl, aryl or aralkyl with 1-16 carbon atoms, or R3OR4; R3 represents alkyl with 1-3 carbon atoms; R4 represents alkylidene, aryl or aromatic alkylidene with 1-16 carbon atoms; R2 represents alkylene with 2-18 carbon atoms or ether-containing hydrocarbyl of which the general formula is -R5-(OR5)n-; in the formula, R5 represents ethylidene or propylidene; n=1-4; and R1 and R2 are independent of each other.

The invention discloses application of an amide compound as a sulfide ore inhibitor, the amide compound is characterized in that the amide compound has a structure shown in a formula (1), in the formula (1), R1 and R2 are alkyl with 1-5 carbon atoms substituted by one or more groups of carboxyl, amino, sulfydryl and acyl, and the amide compound at least comprises one carboxyl and one sulfydryl. The amide compound has the advantages of strong selectivity, good inhibition effect, small dosage, low toxicity, environmental protection and the like as the sulfide ore inhibitor.

The invention discloses a hydroxamic acid-sulfonic acid multi-ligand metal complex collecting agent, and a preparation method and an application thereof. The hydroxamic acid-sulfonic acid multi-ligandmetal complex collecting agent is obtained by a coordination reaction of hydroxamic acid-sulfonic acid multi-ligand composite micelles, prepared from hydroximate and sulfonate, and metal ions. The hydroxamic acid-sulfonic acid multi-ligand metal complex collecting agent has extremely high selective collecting capacity on titaniferous minerals such as ilmenite, rutile and anatase, can achieve selective flotation separation of the titaniferous minerals and gangue minerals, and fundamentally solves the technical problem of difficult flotation separation of the titaniferous minerals and the gangue minerals.

The invention relates to a high-calcium-magnesium high-argillaceous zinc carbonate flotation recovery method which comprises the following steps: (1) desliming flotation: taking lead-zinc sulfide flotation tailings as raw ores, adding a slime collecting agent, stirring and reacting for 3-6 minutes, and then desliming before zinc oxide flotation to respectively obtain slime-containing ore pulp and deslimed tailing ore pulp; (2) roughing zinc oxide: adding regulators of sodium carbonate, sodium sulfide, gangue inhibitor, lauryl amine acetate and butyl xanthate into the deslimed tailing pulp for roughing zinc to respectively obtain zinc rough concentrate pulp and roughed tailing pulp; (3) zinc oxide concentration: performing concentration operation on the zinc rough concentrate pulp twice to obtain zinc oxide concentrate; and (4) zinc oxide scavenging: performing one-time zinc oxide scavenging operation on the roughing tailing pulp to obtain zinc oxide scavenged tailings. According to the method, the floatability of the zinc oxide mineral can be remarkably enhanced, and better mineral separation technical indexes are obtained.

The invention discloses a hydroxamic acid-alkylsulfuric acid multi-ligand metal complex collector as well as its preparation method and application. Hydroxamic acid-alkylsulfate multi-ligand metal complex collector is obtained by coordination reaction between hydroxamic acid-alkylsulfate multi-ligand complex micelles and metal ions prepared by hydroxamate and alkyl sulfate . The hydroxamic acid-alkylsulfate multi-ligand metal complex collector has a very strong selective collection ability for tungsten-containing minerals, and can realize the separation of tungsten-containing minerals and The high-efficiency flotation separation of calcium-containing gangue minerals fundamentally solves the technical problem of difficult flotation separation of tungsten-containing minerals and calcium-containing gangue minerals.

The invention discloses a hydroxamic acid-alkylamine multi-ligand metal complex collector as well as its preparation method and application. The hydroxamic acid-amine multi-ligand metal complex collector is obtained by coordination reaction between hydroxamic acid-alkylamine multi-ligand complex micelles prepared from hydroxamate and alkylamine and metal ions. The hydroxamic acid-alkylamine multi-ligand metal complex collector has extremely strong selective collection ability for rare earth ores, and can realize monazite, bastnaesite The selective flotation separation of rare earth minerals, xenotime and other rare earth minerals and gangue minerals fundamentally solves the technical problem of difficult flotation separation of rare earth minerals and gangue minerals.

The invention discloses a cationic flotation collector and a preparation method thereof. An organic silicon ammonium salt compound shown by a formula I is used as a collector for flotation of oxidized ore and salt ore. In the formula I, R1 is a C8 to C18 alkyl, R2 and R3 may be hydrogen atom, methyl or ethyl respectively, R4, R5 and R6 may be methyl, methoxy, ethyl or ethoxy respectively and X may be Cl or Br. The preparation method is to react fatty amine with organohalosilane at 0 to 80DEG C for 0.5 to 2 hours to form the organic silicon ammonium salt compound shown by the formula I. The organic silicon ammonium salt collector disclosed by the invention can be used in place of a fatty amine collector for removing silicon and purity in reverse flotation of oxidized ore such as aluminum ore and iron ore and for floating zinc oxide and floating and separating potassium chloride and sodium chloride. Compared with fatty amine collector, the cationic flotation collector has the characteristics of high collecting capacity, high selectivity, low use amount per ton of ore, convenience for use and the like.

The invention discloses a non-cyanide ore dressing method for gold-copper-lead sulfide ore, which belongs to the technical field of ore dressing processing and is used for solving the problems of complex process, high environmental pollution, high production cost and low recovery rate existing in the conventional ore dressing method for gold ore with multiple associated metals. The method comprises the following steps of: (1) crushing crude ore; (2) grinding ore; (3) extracting gold by performing Nelson gravity treatment; (4) floating copper and lead in a mixed way; (6) extracting sulfur frommixed flotation tailings of copper and lead; and (7) regrinding and recleaning ore in sulfur. According to the method disclosed by the invention, the use of a highly toxic product, i.e., cyanide in the conventional ore dressing method for gold-copper-lead sulfide ore is avoided, high environmental protection benefit is achieved, production cost is low, process flow is simple, and comprehensive resource utilization ratio is high.

The invention discloses the use of an amide compound as a sulfide mineral inhibitor, characterized in that the amide compound has the structure shown in formula (1), (1), wherein the R 1 , R 2 It is an alkyl group with 1-5 carbon atoms substituted by one or more groups of carboxyl, amino, mercapto, and acyl, and the amide compound contains at least one carboxyl group and one mercapto group. As a sulfide mineral inhibitor, the amide compound of the invention has the advantages of strong selectivity, good inhibitory effect, less dosage, low toxicity, environmental protection and the like.

The invention discloses a copper-based coordination polymer, a preparation method thereof and an application of the polymer serving as a gangue mineral inhibitor to copper-nickel sulfide ore flotation. Polyacrylic acid-carboxymethyl cellulose mixed anhydride and bivalent copper ions are coordinated and polymerized to obtain the copper-based coordination polymer. The copper-based coordination polymer can be effectively dispersed in solution and self-assembled to form colloidal particles loaded with strong negative charge on surfaces, so that the copper-based coordination polymer can be attachedto the surfaces of gangue minerals loaded with positive charged on the surfaces, and the gangue mineral is strongly hydrophilic. The copper-based coordination polymer is applied to copper-nickel sulfide ore flotation and has high selective inhibitory effects on the gangue minerals such as serpentines and quartz loaded with the positive charged on the surfaces, so that copper-nickel sulfide ores and the gangue minerals can be efficiently separated by flotation.

The invention discloses a calcium-containing or silicate-containing gangue mineral flotation depressant and a preparation method and application thereof. The flotation depressant is formed by polymerizing an inorganic polymer and metal ions. The preparation method of the flotation depressant comprises the steps that diatomaceous earth and a sodium hydroxide solution react under a high-temperatureand high-pressure condition to obtain the inorganic polymer, and then polymerization reaction is carried out on the inorganic polymer and metal salt to obtain the flotation depressant. The method is simple and low in cost, the prepared flotation depressant has extremely strong selective depressing effect on the calcium-containing and silicate-containing gangue mineral so that high-efficiency flotation separation of a tungsten-containing mineral from the gangue mineral can be realized; and the use amount of a chemical agent is small, the cost is low, and the flotation index is stable so that the depressant and the method can be widely applied to the great improvement of the concentrate grade and the recovery rate in the tungsten ore flotation process.

The invention discloses a thiourea compound and preparation thereof and an application thereof to metal ore floatation. An N-benzoyl-N'-hydrocarbon propoxy thiourea compound shown as a formula (I) is taken as a floatation collecting agent of nonferrous metal ore and noble metal ore, wherein R1 represents H, alkyl with 1-8 carbon atoms or R3O; R3 represents alkyl with 1-8 carbon atoms; R2 represents alkyl, aryl or aralkyl with 1-16 carbon atoms, or R4OR5; R4 represents alkyl with 1-3 carbon atoms; R5 represents alkylidene, aryl or aryl alkylidene with 1-16 carbon atoms; and n is 1 or 2. Valuable metal ore is recovered efficiently from nonferrous metal ore and noble metal ore by taking the compound shown as the formula (I) as a floatation collector. A floatation collector molecule in the N-benzoyl-N'-hydrocarbon propoxy thiourea compound contains an ether group, the melting point of the collector can be lowered, and the dispersity of the collector in an aqueous solution is enhanced, so that the flotation, separation and extraction of nonferrous metal ore and noble metal ore are enhanced. The N-benzoyl-N'-hydrocarbon propoxy thiourea compound has the characteristics of easy and convenient synthesis method, high metal recovery rate and the like.

The invention discloses a hydroxamic acid-sulfonic acid multi-ligand metal complex collector as well as its preparation method and application. Hydroxamic acid-sulfonic acid multi-ligand metal complex collector is obtained by coordination reaction between hydroxamic acid-sulfonic acid multi-ligand complex micelles prepared from hydroxamate and sulfonate and metal ions. The hydroxamic acid-sulfonic acid multi-ligand metal complex collector has a strong selective collection ability for titanium-containing minerals such as ilmenite, rutile and anatase, and can realize the separation of titanium-containing minerals and gangue minerals. Selective flotation separation fundamentally solves the technical problem of difficult flotation separation of titanium-containing minerals and gangue minerals.

The invention relates to a separating method of mixed plastics and belongs to the technical field of waste plastic recovery. The method includes subjecting mixed plastic particles to surface modification by dipping the mixed plastic particles into an aqueous solution containing a wetting agent until an adsorption amount of the wetting agent on surfaces of the mixed plastic particles is not less than 5 g / t, performing solid liquid separation, adding the obtained solid into an eluant, eluting for not more than 20 min, performing solid liquid separation to obtain solid that is eluted mixed plastic particles, and subjecting the eluted mixed plastic particles to floatation to obtain a single plastic with high purity. The method is high in separation efficiency, simple in operation, easily controllable and low in cost and facilitates large-scale industrial application.