Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D1/00—Flotation
  • B03D1/02—Froth-flotation processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D1/00—Flotation
  • B03D1/02—Froth-flotation processes
  • B03D1/06—Froth-flotation processes differential
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D1/00—Flotation
  • B03D1/02—Froth-flotation processes
  • B03D1/021—Froth-flotation processes for treatment of phosphate ores

Definitions

• ABSTRACT A process for beneficiating celestite, barite, scheelite, fluorite, calcite, magnetite, gypsum, anhydrite, and apatite is disclosed comprising froth floating a ground pulp conditioned with gangue depressant using tetrasodium N-( l,2-dicarboxyethyl)-N-octadecylsu1fosuccinamate as collector.
• This invention relates to an improved process for flotation of certain ores. More particularly, this invention relates to an improved process for froth flotation of celestite, barite, scheelite, and additional ores using tetrasodium N-( 1,Z-dicarboxyethyl)-Noctadecylsulfosuccinamate as collector in conjunction with appropriate gangue depressants.
• Disodium N-octadecylsulfosuccinamate is noted to be more selective'in the ore beneficiation process than is tetrasodium N-( l,2-dicarboxyethyl)-N-octadecylsulfosuccinamate.
• the nature of the ore processed is such as to have particular requirements with respect to collector,-depressants and conditions of use.
• fluorite, calcite, magnetite, gypsum, anhydrite, and apatite which process comprises grinding said ore to flotation size, pulping the ground ore, conditioning the pulp with an effective amount of a depressant for gangue minerals, subjecting the conditioned pulp to froth flotation with tetrasodium N-( 1,2- dicarboxyethyl)-N-octadecylsulfosuccinamate at a usage of about 0. to 0.50 pound per ton of ore, and collecting the concentrate thus floated.
• the process of the present invention provides increased selectivity and increased recovery of thedesired ore over former processes and decreases the requirement for chemicals in processing.
• the present process operates with ores which exhibit ionic nature in the presence of water, employs both collector and depressant, and makes use of a tetrasodium form of sulfosuccinamate.
• the ore employed is selected from celestite, barite, scheelite, fluorite, calcite, magnesite, gypsum, anhydrite, and apatite.
• Gypsum and anhydrite merely differ in water content but otherwise represent the same mineral content.
• Apatite refers generally to phosphate rocks containing minerals in the apatite group.
• the ore selected is ground to a size suitable for froth flotation. Typically, the size of the grind is such that a large portion will pass through a 200 or 325 mesh screen.
• the conventional grind After the conventional grind has been obtained, it is pulped in water in accordance with conventional froth flotationprocedures. Conveniently, the grind is pulped directly in the flotation cell used to carry out conventional froth flotations. The nature of the pulp should be the same as is customarily processed except for additives used in processing.
• sodium silicate is used at a concentration of about 0.5 to 5 pounds per ton of ore.
• quebracho is used at a concentration of about 0.1 to 1.0 pound per ton of ore.
• NaOH is used at about 0.5 pound per ton of ore.
• fluorite the use of sodium carbonate and sodium silicate is eliminated by the present invention, thus effecting a saving of up to about 10 pounds per ton of each of these chemicals.
• the time ofconditioning is usually short, i.e., from a fraction of a minute to several minutes,and needs to be only as long as is required to effect satisfactory pulp dispersion.
• froth flotation employing from about 0.10 to 0.50 pound per ton of ore of tetrasodium N-( l,2-dicarboxyethyl)-'N- octadecyl-sulfosuccinamate preferably from about 0.10 to 0.35 lb./ton of ore. It is generally preferable to add the sulfosuccinamate in stages, employing short conditioning and flotation steps in each stage.
• Tetrasodium N-( 1,2-dicarboxyethyl )-N-octadecylsulfosuccinamate is the sole collector contemplated by the present invention since othercollectors do not provide the desired selectivity and recovery features. 'The effectiveness of the tetrasodium compound in the present process is highly unexpected in view of the US. patent cited above wherein it is noted that the disodium compound was more effective with the specific ores processed therein.
• the concentrate produced by froth flotation is then collected by suitable procedures normally employed in conjunction with conventional processes. Upon collection, the rough concentrate is frequently of commercial grade and may be processed without additionaltreatment. It is generally desirable, however, to obtain cleaner concentrates by reflotation of the rougher concentrate. In the reflotation, use may be made of small amounts of collector, depressant, or both depending upon the nature of the rough concentrate initially obtained. Thus, if recovery is lower than desired, small increments of collector are added in each cleaning cycle. If purity is low in the roughconcentrate, small increments of depressant are added in each cleaning. If both purity and recovery need improvement, both collector and depressant may be added in small increments. An increment of collector is generally of 0.01-0.02 lb. per ton of original ore. An increment of depressant may be about0.2 lb. per ton of original ore.
• Flotation was then effected with staged additions of tetrasodium N-( l,2-dicarboxyethyl)-N-octadecylsulfosuccinamate in five stages each of 0.042 lb. per ton of ore to give a total of 0.21 lb. per ton of collector.
• Each stage consisted of 0.5 minute of conditioning and 1.0 minute of flotation using a polypropylene glycol type frother, at a total usage of 0.05 lb. per ton of ore.
• the rougher concentrate obtained was cleaned twice by reflotation using 0.0175 lb. per ton of original ore of the collector identified above in each cleaning.
• Barite Flotation Ore assay 55% BaSO 20% CaF CaCO;,, 5% silicates
• the ore was ground to 85 percent minus 325 mesh.
• the ground ore was pulped in a flotation cell to a consistency satisfactory for flotation.
• the pulp was conditioned with varying amounts of Na siO for 3 minutes.
• Flotation was then effected in five stages using 0.042 lb. per ton of ore of the collector of Example 1 in each stage, for a total usage of collector of 0.21 lb./ton, each stage consisting of 0.5 minute of conditioning and 1.0 minute of flotation. Frother was as in Example 1.
• the rougher concentrate obtained was cleaned twice by reflotation using 0.0175 lb./ton of original ore of the collector employed initially in each cleaning.
• EXAMPLE 4 Scheelite Flotation Ore assay: 0.9% W0 as CaWO with garnet, calcite, diopside, and quartz as principal gangue minerals.
• the ore was ground to 47 percent minus 200 mesh.
• the ground ore was pulped in a flotation cell to a consistency satisfactory for flotation.
• the pulp was conditioned for 5 minutes using Na cO 1.5 lb./ton of ore and Na SiO 3.0 lb./ton of ore, at pH 9.7 as depressants.
• Flotation was carried out in live stages using 0.07 lb./ton of the collector of Example 1 in each stage for a total usage of collector of 0.35 lb./ton of ore. Each stage used 0.5 minute of conditioning and 1.0 minute of flotation.
• the rougher concentrate obtained was cleaned twice by reflotation using 1.0 lb. of Na SiO per ton of original ore in each cleaning.
• Fluorite Flotation Ore assay 55% CaF 25% CaCO ,l6% SiO balance silicates.
• the ore was ground to 45 percent minus 200 mesh.
• the ground ore was pulped in a flotation cell to a consistency suitable for flotation.
• the pulp was conditioned at C. for 2 minutes using Quebracho, 0.2 lbjton of ore.
• the conditioned pulp was froth floated in two stages using 0.02 lb./ton of frother described of Example 1.
• the collector was as in Example 1 at a usage of 0.07 lb./ton in each stage. Each stage involved 0.5 minute of conditioning and 1.5 minutes of flotation, thus involving 0.14 lb./ton of collector.
• the rough concentrate was repulped at 80C. and refloated five times using 0.05 lb./ton of the same collector and 0.05 lb./ton of quebracho in each cleaning.
• Calcite Flotation Ore Assay 65% CaCO with quartz as principal gangue mineral The ore is ground to 70 percent minus 200 mesh,
• the ore is ground to 80 percent minus 100 mesh, conditioned for 2 minutes with 1 lb. per ton of quebracho, and froth floated using the frother of Example 1 with two staged additions of the collector of Example 1 for a total usage of collector of 0.245 lb. per ton of ore.
• the rougher concentrate is cleaned twice using 0.05 lb. per ton of quebracho and 0.02 lb. per ton of collector in each cleaning. Results are as follows:
• EXAMPLE 9 Ore Assay A crude phosphate rock containing 15 percent P O in the form of minerals of the apatite group with siliceous and argillaceous gangue minerals.
• the ore is ground to minus 35 mesh, scrubbed at percent solids, and screened to remove minus mesh material.
• the plus 150 mesh material is conditioned for 2 minutes with 0.5 lb. per ton of NaOH and then froth floated using the frother of Example 1 for 5 minutes with two staged additions of the collector of Example 1 to a total usage of 0.21 lb. per ton of ore.
• a method of beneficiating an ore selected from the group consisting of celestite, barite, scheelite, fluorite, calcite, magnesite, gypsum, anhydrite, and apatite which comprises grinding said ore to flotation size, pulping the ground ore in water, conditioning the pulp with an effective amount of a neutral or alkaline type depressant for the gangue material, selected from the group consisting of sodium silicate, quebracho and sodium hydroxide, subjecting the conditioned pulp to froth flotation with tetrasodium N-( l ,2- dicarboxyethyl)-N-octadecylsulfosuccinamate at a usage of about 0.10 to 0.50 lb. per ton of ore, and collecting the concentrate thus floated.
• a neutral or alkaline type depressant for the gangue material selected from the group consisting of sodium silicate, quebracho and sodium hydroxide
• the ores are selected from celestite, barite, scheelite, calcite and magnesite and the depressant is sodium silicate in an amount of about 3 to 5 lbs. per ton.
• the process of claim 1 wherein the collector is 10.
• the process of claim 2 wherein the ore is scheeused in the range of 0.01 to 0.35 lb. per ton of ore. lite.
• froth flotation is 11.
• the process of claim 2 wherein the ore is calcite :0 carried out in stages with partial usage of collector in each stage so as to provide total collector Usage in the 12.

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• Paper (AREA)
• Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
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• Manufacture And Refinement Of Metals (AREA)
• Curing Cements, Concrete, And Artificial Stone (AREA)
• Degasification And Air Bubble Elimination (AREA)
• Water Treatment By Electricity Or Magnetism (AREA)

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Cited By (21)

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Citations (9)

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• 1972
  • 1972-03-24 US US00237874A patent/US3830366A/en not_active Expired - Lifetime
  • 1972-08-29 CA CA150,491,A patent/CA950684A/en not_active Expired
• 1973
  • 1973-01-09 ZA ZA730147A patent/ZA73147B/xx unknown
  • 1973-01-11 AU AU51022/73A patent/AU474870B2/en not_active Expired
  • 1973-01-12 GB GB183973A patent/GB1407524A/en not_active Expired
  • 1973-01-18 IT IT47764/73A patent/IT976948B/it active
  • 1973-01-31 AR AR246362A patent/AR193461A1/es active
  • 1973-03-14 BR BR731817A patent/BR7301817D0/pt unknown
  • 1973-03-15 DE DE2312998A patent/DE2312998A1/de active Pending
  • 1973-03-22 FR FR7310345A patent/FR2177870B1/fr not_active Expired
  • 1973-03-23 JP JP3280873A patent/JPS5646906B2/ja not_active Expired
  • 1973-03-24 ES ES412980A patent/ES412980A1/es not_active Expired
• 1978
  • 1978-05-16 KE KE2841A patent/KE2841A/xx unknown

Patent Citations (9)

Non-Patent Citations (2)

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