Abstract:
A magnesium suppressant/flocculant for use in separating dolomite from calcium phosphate. The magnesium suppressant/flocculant may be applied at a mine site prior to subjecting ore fractions to phosphate flotation or at a chemical plant after grinding.
Abstract:
The present invention relates to polysaccharides that have been modified by providing azetindium functionality thereto. Such functionality can be provided by crosslinking a polysaccharide with a resin having azetidinium functional groups. In one or more aspects, the polysaccharide can comprise one or more of starch, guar gum, alginate or derivatives thereof. Polysaccharides having azetidinium functionality according to the present invention are suitable for multiple uses. Such uses include, but are not limited to, removal of one or more solid materials from a liquid, beneficiation of an ore; removal of metallic ions from a liquid; providing oil from bitumen; and removal of mercury from synthetic gypsum. Other uses of the functionalize polysaccharides of the present invention include hydroseeding, dust control and erosion control.
Abstract:
The method of the invention is directed to the polymerization of acrylamide and cationic or anionic monomer(s) in a salt solution with the use of PEI (Poly Ethylene Imine), SMA (Styrene Maleic Anhydrous) and non-ionic surfactant mixture as dispersant and the incorporation of PAC (Poly Aluminium Chloride) and/or a collodial silica during the polymerization for performance enhancement.
Abstract:
The present embodiments generally relate to a technology for improving Cu/Mo grade by the addition of cationic polymers as selective depressants for acid insoluble matters, e.g., silicates and/or clays, in the flotation circuit. Various types of cationic polymers are demonstrated to be effective depressants including polyamine, polyDADMAC, and cationic polyacrylamide. Also disclosed are processes for enriching a desired mineral from an ore comprising the desired mineral and gangue, wherein the process comprises carrying out a flotation process in the presence of one or more cationic polymer depressants.
Abstract:
The present invention relates a process for simultaneously preventing formation of slime stabilized foam and decreasing reagent consumption in a phosphate beneficiation flowsheet comprising adding an effective amount of a polymer to a rougher feed slurry and/or a cationic feed slurry wherein the polymer flocculates slime, adding an effective amount of a collector and removing the flocculated slime by flotation.
Abstract:
A novel process for adsorptive aggregation and also floatation of Carling type gold ores, which goes far beyond the conventional floatation method. Said novel technological procedures comprise fine grinding as well as sluicing of raw ores and adding special floatation agents such as stripping agent, adsorptive aggregation agent as well as collecting agent and flocculant in the course of coarse screening and sweep screenings. The fine ore obtained using the present process is graded as 22 g/T with a recovery yield langer than 83%. Said process has a screening index high and stable, it is safe and reliable and can be effectively put into industrial production.
Abstract:
The present invention provides a blended preparation for the separation especially of coal particles from the tailings which are contained in the fines produced in coal mining. The blended preparation is used instead of or in addition to the conventional froth oil. The blended preparation comprises froth oil, flocculating agent, emulsifying agent, water and optionally, anti-freeze. The use of the preparation results in faster separation and saving in flocculating agent.
Abstract:
Aqueous suspensions of red mud are effectively removed from the Bayer process for making alumina by the addition to at least the first stage of the caustic recovery circuit of a flocculant selected from the group consisting of starch, homopolymers of acrylic acid or acrylates, copolymers of acrylic acid or acrylates containing at least 80 molar percent acrylic acid or acrylate monomers and combinations thereof and subsequent addition to later, more dilute stages in the caustic recovery circuit of a copolymer containing from about 35 to 75 molar percent of acrylic acid or acrylate and from about 65 to 25 molar percent of ethylenically unsaturated polymerizable monomers.
Abstract:
Cost effective and environmentally acceptable reagents and a method for flocculating fine particles from liquid suspensions are provided. A method for selectively flocculating fine particles from a slurry is also provided. The reagents comprise orange peel extract, corn husk extract and mixtures thereof. The method generally comprises the step of adding a reagent to a suspension of fine particles, mixing the combination of reagent and suspension and allowing the flocculated fine particles to settle out of suspension.
Abstract:
Modification of a polyacrylamide to provide a content of N-hydroxymethyl groups thereon results in a selective flocculant which is effective in separating mineral values from an ore or mixture.