A flotation arrangement for treating mineral ore particles suspended in slurry includes a primary flotation line with a rougher part including at least two rougher primary flotation cells and a scavenger part including at least two scavenger primary flotation cells, and a secondary flotation line including at least two secondary flotation cells. A first secondary flotation cell is arranged to receive primary overflow from the at least one rougher primary flotation cell, and a further secondary flotation cell to receive primary overflow from the at least one further rougher primary flotation cell. The further secondary flotation cell is arranged in fluid communication with a previous secondary flotation cell, and underflow from the first secondary flotation cell is arranged to flow into the further secondary flotation cell, or arranged to be combined with secondary underflow of the further secondary flotation cell.

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 NH3 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.

The disclosure relates to a beneficiation process for uranium ore comprising a hydrocyclone step that produces an underflow fraction containing uranium values for further processing and an overflow fraction containing fine particulate waste material

THIS invention relates to an integrated process for recovering the valuable iron fraction from low grade iron ore, including the steps of: comminution 14 and classification 36/39 to obtain a classified fraction suitable for coarse flotation and classified fraction suitable for fine beneficiation; subjecting the fraction suitable for coarse flotation to coarse flotation 40 to obtain an intermediate iron concentrate 42 and a coarse sand residue 44; grinding the intermediate concentrate to a size suitable for fine beneficiation; and subjecting the fractions suitable for fine beneficiation to fine beneficiation 46 and obtaining a final iron concentrate 48 and a fine tailings 50.

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.4COOH (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 beneficiation process for uranium ores comprising clay and carbonate minerals, the process comprising: performing a hydrocyclone step to obtain a hydrocyclone underflow fraction substantially comprising the uranium component; treating the hydrocyclone underflow fraction to effect a separation of carbonate and uranium minerals; and recovering the uranium-bearing minerals to produce a uranium concentrate.

This invention applies to the field of ore processing processes aiming to provide a reduction or increase in the concentration of one of its constituents, as well as describes a process to concentrate the lithium oxide content from pegmatite rock from the tailings of heavy mineral gravimetric concentration recovery processes.

The object of this invention is to provide a method of mineral flotation using bioreagents extracted from Gram positive bacteria Rhodococcus opacus and Rhodococcus erythropolis. In this sense, mineral floatability was evaluated using bioreagent extracted from Gram positive bacteria to determine its potential as an alternative to synthetic reagents and also an alternative to the use of microorganisms themselves (biomass).

The present invention relates to a compound of formula (I): ##STR00001## in which: the R.sub.1 and R.sub.2 groups, which may be identical or different, are, independently of one another, a saturated or unsaturated, linear, branched or cyclic hydrocarbon group having from 1 to 15 carbon atoms, preferably from 1 to 10 carbon atoms; the R.sub.3 and R.sub.4 groups, which may be identical or different, are selected, independently of one another, from a hydrogen atom, a methyl group or an ethyl group; the R, R.sub.6 and R.sub.7 groups, which may be identical or different, are selected, independently of one another, from a hydrogen atom or an alkyl group comprising from 1 to 6 carbon atoms; n is an integer of 0 to 20; and m is an integer of 1 to 6.

A process to beneficiate oxidized iron ore can include the steps of: (1) adding a polysaccharide to the oxidized iron ore; (2) adding at least one amine; and (3) adding at least one salt; wherein the pH of the process is below 10 and greater than 5.