The present invention relates to a process for treating non-sulfidic ores with a collector composition containing a primary and a secondary collector, wherein the primary collector is selected from the group of amphoteric and anionic surface active compounds and the secondary collector is an ethoxylated fatty acid wherein the average degree of ethoxylation is higher than 0 and less than 2, to collector compositions suitable for use in the above process, and to pulp comprising such collector compositions.

The invention relates to esterquats which can be obtained by reacting di- or trialkanolamines with a mixture of fatty acids and polycarboxylic acids, and the esters obtained in this manner are then quaternized with an alkylating agent, wherein the di- or trialkanolamines correspond to formula (I), ##STR00001##
in which R1 and R2 independently of one another represent hydroxyalkyl groups with 1 to 20 carbon atoms, hydroxyalkenyl groups with 2 to 20 carbon atoms and 1, 2, or 3 double bonds, or addition products of 1 to 20 mol ethylene oxide on a hydroxyethyl group and R3 represents hydrogen, an alkyl group with 1 to 20 carbon atoms, an alkenyl group with 2 to 20 carbon atoms and 1, 2, or 3 double bonds, a hydroxyalkyl group with 1 to 20 carbon atoms, a hydroxyalkenyl group with 2 to 20 carbon atoms and 1, 2, or 3 double bonds, or addition products of 1 to 20 mol ethylene oxide on a hydroxyethyl group; the fatty acids correspond to formula (II),
R.sup.4—COOH  (II)
in which R4 represents an aliphatic, linear, or branched hydrocarbon group with 5 to 29 carbon atoms and 0, 1, 2, or 3 double bonds; and the polycarboxylic acids correspond to formula (III), ##STR00002##
in which Y represents a carbon atom or a saturated or unsaturated aliphatic hydrocarbon group with 2 to 5 carbon atoms, said group optionally having one or more hydroxyl groups, and X represents hydrogen or a hydroxy- or carboxylic acid group. The invention also relates to the use of said esterquats as collectors for the flotation of non-sulfidic minerals.

The invention relates to a method for manufacturing a concentrate enriched in a phosphate mineral content from an ore, which contains a phosphate mineral and a non-phosphate mineral, by a flotation, which method comprises the step of adding a surfactant system comprising (A) a fatty acid, (B) a blend of ethoxylated and non-ethoxylated alcohols, which is obtainable by blending (i) a reaction product of a first C.sub.12-C.sub.16 aliphatic alcohol having an average degree of branching of 1.9 to 3.5 and 10 to 20 equivalents of ethylene oxide, and (ii) a second C.sub.12-C.sub.16 aliphatic alcohol having an average degree of branching of 1.9 to 3.5, wherein the amount of (i) is 80 to 95 wt. % and the amount of (ii) is 5 to 20 wt. % and wt. % is based on the overall weight of the mixture of ethoxylated and non-ethoxylated alcohols, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a use of the surfactant system as flotation collector is disclosed.

A collector 2-cyano-N-(substituted carbamoyl)acetamide compound in flotation of calcium-bearing minerals and a highly selective flotation reagent for the calcium-bearing minerals are provided. The highly selective flotation reagent includes the 2-cyano-N-(substituted carbamoyl)acetamide compound and an auxiliary collector. The 2-cyano-N-(substituted carbamoyl)acetamide compound has an excellent effect on flotation separation of the calcium-bearing minerals and a foaming performance. Dosage is further reduced and a flotation performance is improved by compounding the compound with the auxiliary collector. The flotation reagent can preferably separate fluorite from calcite by flotation, efficiently separates the fluorite and the calcite from scheelite under neutral condition (pH is about 7), effectively purifies rough scheelite concentrate and improves grade of scheelite concentrate. Meanwhile, the neutral flotation reduces influence on the environment.

According to the invention there is provided a method of processing a mixture of minerals including the steps of: (a) providing a mixture of minerals which includes a metal containing mineral and one or more unwanted gangue minerals; (b) achieving a contact between the mixture of minerals and polymeric material that includes a mineral binding moiety which selectively binds to the metal containing mineral; and (c) separating the gangue minerals and the polymeric material which has the metal containing mineral bound thereto.

The present invention pertains to a composition comprising at least one compound of formula (I) and to the use of said composition for recovering value minerals from ore and other feedstocks by flotation.

The disclosure relates to mineral processing, and more particularly to a copper(II)-ammonia complex ion sulfidization activator, and its preparation and application. A molar ratio of NH.sub.3 to Cu.sup.2+ in the active ingredient of the copper(II)-ammonia complex ion sulfidization activator is 2:1-4:1. The preparation method includes: dropwise adding an ammonia solution to a copper salt solution; and adjusting the mixture to pH 6-7.2 with dilute sulfuric acid to obtain the copper(II)-ammonia complex ion sulfidization activator. During the sulfidization flotation for the copper oxide ore, the copper(II)-ammonia complex ion sulfidization activator is added and mixed uniformly with the ore slurry prior to the introduction of the sulfidizing agent.

Disclosed is a sodium petroleum sulfonate collector for fluorite flotation, comprising sodium petroleum sulfonate and non-polar oil, wherein the molar ratio of the non-polar oil to the sodium petroleum sulfonate is 3.33-5.67, the sodium petroleum sulfonate comprises raw material oil and active substance, the molecular weight of the raw material oil is 350-450, the molecular weight of the sodium petroleum sulfonate is 500-750, the aromatic hydrocarbon comprises benzene ring hydrocarbon and naphthalene ring hydrocarbon, the content of the benzene ring hydrocarbon is 5% to 11%, and the content of the naphthalene ring hydrocarbon is 5% to 5.2%, the raw material oil needs to be sulfonated by sulfur trioxide, and the molar ratio of the aromatic hydrocarbon to the sulfur trioxide in the raw material oil is 2.4 to 5. The sodium petroleum sulfonate collector proposed by this disclosure is both efficient and low temperature resistant.

The present invention relates to the use for ore beneficiation, of at least one derivative of alkoxylated (polyester)amine. The present invention also relates to the flotation pulp and the tailings comprising said product useful for ore beneficiation.

A pre-flotation high efficiency slurry conditioning device for wide-particle-grade flotation, suitable for coal slime flotation. Said device comprises a slurry conditioning drum (15) having a columnar structure on top and an inverted frustrum structure below, an ore slurry outlet (4) is provided at an upper part of a side wall, ore slurry pump separation openings (5) are provided at two sides below the ore slurry outlet (4), ore slurry jet openings (17) are respectively provided at two sides of the columnar structure, and circular cutting isolation plates (11) and flow guide plates (10) are provided in alternation at inner sides of the upper half of the slurry conditioning drum (15); a dual channel jet circulation chemical feed system comprises chemical feed pipes (13), each chemical feed pipe (13) comprises an inlet end, a diffusion end, and a chemical feed pipe opening arranged at a throat area of said pipe, the inlet end is connected to a three-way pipe by means of a centrifugal pump (8), which is connected to an ore slurry inlet (6) and an ore slurry pump separation opening (5), a mixing shaft (7) is provided in the axial direction within the slurry conditioning drum (15), a plurality of mixing impellers (14) are arranged on the mixing shaft (7), and the bottom-most two mixing impellers (14) and the lowest two circular cutting isolation plates (11) are arranged at a same horizontal height. The present apparatus can effectively improve coal slime hydrophobic flocculation and fine slime separation, improve an ore slurry preprocessing effect, and effectively alleviate internal flow field pressure within a flotation device.