flotation process patent


us4394257afroth flotation processgoogle patents

a process for the recovery of mineral values by froth flotation in an aqueous medium employing a novel frother. frothers prepared by michael addition between alpha betaunsaturated ethylenic compounds and either alcohols amines or mercaptans or by the condensation of hcn aldehydes/ketones with either alcoholics amines or mercaptans have been found to be effective in the froth flotation inquire now

flotation process optimisation through frequent inline

flotation is a concentrating process that has been around since 1860 with the first patent by william hayes. early in the 20th century flotation evolved into the process familiar to metallurgists today. the drive has always been towards optimising the grade and recovery profile of the flotation process.inquire now

history of flotation patentsmineral processing & metallurgy

this is the part of the subject of which we have heard the most; indeed until recently the literature of the flotation process was closely identified with the records of patent litigation. that is why the scientific principles are as yet so little understood and the technology of the process has made such scanty progress. the aim of a patent specification is to disclose just enough to prove inquire now

flotation in seawaterrequest pdf

chilean patent no 00475/inapi.inhibition of bubble coalescence is of fundamental importance in a flotation process because it determines the size of bubbles and foam stability. for this work inquire now

flotationmining mill operator training

froth flotation is a physicochemical separation process. separation is principally based on differences in surface hydrophobicity. however particle size and density have a significant impact. initial flotation patent and application was developed for graphite by the bessel brothers 1877. similar to graphite coal is naturally hydrophobic.inquire now

fluorite flotation separationore beneficiationflotation

fluorite flotation separation. fluorite also known as fluorspar is a major source of industrial fluoride elements 20 kinds of the world one of the important nonmetallic mineral materials fluorite is widely used in the metallurgy of aluminum glass ceramic cement chemical industry.inquire now

selective flotation of scheelite from calcium minerals

selective flotation of scheelite lii yongxin and li changgen beijing institute of mining and metallurgy beijing china received april 13 1982; revised and accepted september 30 1982 abstract yongxin l. and changgen l. 1983. selective flotation of scheelite from calcium minerals with sodium oleate as a collector and phosphates as modifiers.inquire now

patent us3844939 flotation separation of feldspar google

patent us3844939flotation separation of feldspargoogle patents an improved process for separating feldspars from feldspathic ores by the feldspars in the froth or foam thus generated leaving other constituents such as.inquire now

esteralcohol frothers for froth flotation of coal patent

this patent describes a 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 coal particle collector and an alcohol frother.inquire now

kaolin flotationsciencedirect

dec 01 2002· kaolin is valued as a white pigment and therefore the goal in kaolin flotation circuits is to remove the colored impurities to result in an acceptable brightness product. kaolin flotation originated with a novel carrier flotation process and later on carrierless flotation techniques were developed.inquire now

us patent for froth flotation process patent patent

justia patents preferential us patent for froth flotation process patent patent # 4514292 froth flotation process . nov 9 1983hercules incorporated. the froth flotation of ore and coal is significantly improved in recovery and grade of valuable minerals and coal when a depressant combination of an inorganic sulfite and the salts of inquire now

pdf a review of graphite beneficiation techniques

a review of graphite beneficiation techniques.1877 this patent outlined a process for the flotation of graphite from ores using 1 to 10% of oil and listing more than 16.inquire now

froth flotation of phosphate rock.university of louisville

froth flotation of phosphate rock. david l. spitzer 19232012flotation is a process for the physical separation of grains of different minerals. solid minerals are chemical compounds ofly the xanthates as a mineral flotation agent 19. a similar patent was issued to inquire now

flotation processbonneville ltdfree patents online

united states patent 2329149the invention provides a new flotation process by which potassium chloride may be advantageously separated from such ores or salt mixtures by the use of new flotation agents. the new flotation agents used in the process of this invention are water soluble salts of straight chain monoacyl derivatives of ethylene inquire now

us4268380afroth flotation processgoogle patents

an improvement in the froth flotation separation of metallic sulfide mineral ores particularly those ores bearing copper and molybdenum in which a mercaptan collector is used in an earlier primary flotation stage the improvement comprising the addition of activated carbon to achieve deactivation of the mercaptan collector prior to the component mineral separation stage thereby providing inquire now

who invented the flotation process?

froth flotation is a process for selectively separating hydrophobic materials from hydrophobic. this is used in several processing industries.and bessemer took out a patent on the process inquire now

patented modular aerofloat daf patent pending

aerofloat is a unique and affordable dissolved air flotation daf product with capacities from 7800 litres per minute l/min or 0.450 m3 per hour m3/h. the treatment process the basic principle of the aerofloat product involves pumping a side stream of treated effluent to an elevated pressure dissolving air under pressure supersaturatinginquire now

fine particles flotation patentbusoheemschool2.be

the flotation processtoday in sci. the flotation process until the invention of the flotation process the extraction of metal depended upon being able to handpick the material in order to be economical. taking copper as an example previously that meant that using lowgrade oreswith less than four percent metal contentchat hereinquire now

flotation processcommonwealth industrial gases limited

mar 09 1999· united states patent 5879542 . abstract: disclosed is a process for the flotation of a mineral concentrate comprising the steps of forming an aqueous slurry of a milled mineral ore containing particles of a desired mineral species and adding a flotation reagent which causes a desired variation in the flotation tendency of the desired mineral inquire now

the flotation method of separation of multicomponent mixtures

the objective of the invention is to improve the performance of the flotation process multicomponent mixture and the efficiency of separation of hydrophobic and hydrophilic components i.e. the reduction of polluting components in the foam chamber and the products for example when the flotation separation of coppernickel matte.inquire now

closedwater circuitry of a coal preparation plant with

most coal preparation plants treating metallurgical coal employ flotation process for recovering concentrate from 0.5mm fraction. for full utilization of combustibles the common practice of flotation operation is to give a relatively low ash concentrate while leaving a medium ash tailing as an inferior fuel.inquire now

walter hoecker inventions patents and patent applications

abstract: disclosed is a process for the flotation of a mineral concentrate comprising the steps of forming an aqueous slurry of a milled mineral ore containing particles of a desired mineral species and adding a flotation reagent which causes a desired variation in the flotation tendency of the desired mineral species present within the slurry so as to increase the efficiency of separation of inquire now

the flotation processtoday in sci

the flotation process depends on the properties of minerals by which their surfaces differ in the degree by which their surfaces can be wetted and takes best advantage of such differences by suitable choice of the solution.flotation process patent 1898 by alexander and francis elmoreinquire now

the inventor the patent carrie everson: defining success

the inventor the patent & carrie everson: defining success by dawn bunyak in 1990 kathryn phillips conducted a professional study of the u.s. patent office files to determine how many patents were generated by women. phillips found that only oneandahalf per cent of the patents granted between 1790 and 1984 were pre­ sented to women! in inquire now

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flotation process patent