Abstract: This invention provides a surprisingly efficacious combination useful for inhibiting microorganism growth, particularly in aqueous slurries containing mineral ore. In particular embodiments, the invention provides an antimicrobial composition comprising 1-(3-chloroallyl)-3,5,7 triaza-1-azoniaadamantane chloride and 2-bromo-2-nitropropane-1,3-diol. The invention also provides a method for inhibiting microbial growth in an aqueus mineral or ore slurry, e.g. a kaolin slurry. The method includes the step of adding to the slurry a microbiocidal composition of 1-(3-chloroallyl)-3,5,7 triaza-1-azoniaadamantane chloride and 2-bromo-2-nitropropane-1,3-diol.

Abstract: A method for inhibiting the precipitation of sodium oxalate crystals in a Bayer process liquor. The method comprises the step of adding to the Bayer process liquor, after red mud separation and immediately prior to crystallization of alumina trihydrate, or during crystallization of alumina trihydrate, or during classification of alumina trihydrate, an effective amount of a cationic, surface active, alkylammonium salt compound.

Abstract: A method for defoaming a Bayer process liquor, the method comprising the steps of adding to the Bayer process liquor an effective amount of an antifoam/defoamer composition comprising a water-soluble polypropylene glycol having an average molecular weight of from about 200 to about 600 daltons.

Abstract: A bacterial-assisted heap leach process is employed for the solubilization of a metal from a refractory ore containing fines and/or clay wherein at least a portion of the metal is solubilized by the bacterial oxidation of sulfides and the concomitant or sequential dissolution of the metal into a leaching solution. For some metals, the leaching solution has a pH of greater than about 9. The improvement in the process includes the application of an aqueous solution of acrylamide polymer to the ore in an amount effective to agglomerate the fines and/or clay prior to heap formation. The acrylamide polymer has a molecular weight of at least 500,000 and is comprised of from about 0 to about 100 mole percent of (meth)acrylamide mer units and from about 0 to 100 mole percent of N-sulfoalkyl(meth)acrylamide mer units. The acrylamide polymer is preferably applied to the ore as an aqueous solution formed at least in part by recycled bio solution.

Abstract: The invention provides a method for the suppression of bauxite dust emissions from dry, finely divided bauxite ore. The method includes the step of contacting bauxite ore with an aqueous solution of a water-soluble vinyl addition polymer. The polymer being selected from the group consisting of non-ionic and anionic water-soluble vinyl addition polymers.

Abstract: High molecular weight copolymers of acrylamide which contain between 5-100 mole % of acrylic acid and have a molecular weight of at least 1,000,000 prevent scale adhering to surfaces in contact with digested phosphate rock and/or phosphoric acid produced from digestion.

Abstract: The agglomeration of gold or silver ore fines is improved by the use of a water-soluble vinyl polymer as the agglomerating agent.

Abstract: An improved froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed particles as an aqueous phase in the presence of a frother, the improvement comprising a frother of at least 4-methyl cyclohexane methanol.

Abstract: The agglomeration of gold or silver ore fines is improved by the use of a water-soluble vinyl polymer as the agglomerating agent.

Abstract: An improved method for extracting copper from copper minerals by heap leaching with dilute sulfuric acid which comprises agglomerating the copper mineral fines prior to their being formed into an heap with an agglomerating agent comprising an anionic acrylamide polymer which contains at least 5 mole percent of carboxylate or sulfonate groups and has a molecular weight of least 100,000.

Abstract: An improved method for the froth flotation recovery and/or grade of vermiculite from vermiculite containing rock and clay. It uses a composition comprising oil and between 2-60% by weight of an alkyl phenol formaldehyde condensation product.

Abstract: A method of increasing the yield of coal undergoing a concentration treatment of froth flotation by using as the collector an alkyl phenol formaldehyde condensate product having 4-5 phenolic nuclei with the alkyl group of said phenol having between 4-15 carbon atoms.

Abstract: An improved coal-water slurry containing finely divided coal particles and a dispersing agent which is comprised of a water-soluble homopolymer of a monomer represented by the formula: ##STR1## wherein: M is hydrogen, lithium, sodium, potassium, magnesium, or calcium;R is allyl or methallyl;R.sub.1 is hydrogen, allyl or methallyl;R.sub.2 is hydrogen or sulfonate;R.sub.3 is hydrogen or sulfonate; and providing that R.sub.2 is not the same as R.sub.3.These improved coal-water slurries are best formulated at a pH of at least 6 and, preferably, above 8. The dispersants have a molecular weight between 1000-20,000.

Abstract: Particulate matter common to sintering operations can be substantially reduced by the addition to the sinter mix prior to fusion of a soluble lignosulfonate.

Abstract: Particulate matter common to sintering operations can be substantially reduced by the addition to the sinter mix prior to fusion of an alkali metal or ammonium silicate.