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 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 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 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 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.