5028315 Froth flotation apparatus and method
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New Patents 1471 5015368 ORE FLOTATION PROCESS USING CARBAMATE COMPOUNDS Biase Stephen Di, James H Bush assigned to The Lubrizol Corporation The present invention relates to an improved process for beneficiating an ore. In particular, the process is useful for beneficiating ores and recovering metal values such as gold, copper, lead, molybdenum, zinc, etc., from the ores. In one embodiment, the process comprises (A) for- ming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is at least one carbamate represented by the formula: See Patent for Chemical Structure (I) wherein each R1 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R1 taken together with R2 and the nitrogen atom form a five, six or seven mem- ber heterocyclic group; each R2 is independently a hydrocarbyl group having from 1 to about 18 carbon atoms, or R2 taken together with R 1 and the nitrogen atom form a five, six or seven mem- ber heterocyclic group; and R3 is a hydrocarby- lene group having from 1 to about 10 carbon atoms; (B) subjecting the slurry from step (A) to froth flotation to produce a froth; and (C) recovering a mineral from the froth. 5021088 BIOHYDROMETALLURGICAL PROCESSING OF ORES, AND MICROORGANISMS THEREFOR Ralph Portier assigned to Louisiana State University A process for the separation and recovery from an ore of a metal, or metals, particularly strategic and precious metals, notably gold. A carbon- containing, gold-bearing ore, notably a car- bonaceous or carbonaceous pyritic ore, is contacted and microbially pretreated and leached with a heterotrophic microorganism, or admixture of microoganisms, at heterotrophic conditions to cultivate and grow and said micro- organism, or microorganisms, and reduce the carbon content of the ore by consumption of the carbon. The ore, as a result of the heterotrophic pretreatment is subsequently more advan- tageously colonized by an autotrophic micro- organism, or microorganisms, at autotrophic conditions, or hydrometallurgicaUy treated, or both, to facilitate, enhance and increase the amount of gold recovered vis-a-vis a process wherein the gold is recovered (1) by hydro- metallurgical processing alone at otherwise similar conditions, or (2), in treating a pyritic ore, by the combination of the auto- trophic/hydrometallurgical processing, at other- wise similar conditions. 5022983 PROCESS FOR CLEANING OF COAL AND SEPARATION OF MINERAL MATTER AND PYRITE THEREFROM, AND COMPOSITION USEFUL IN THE PROCESS Cal Y Myers, Richard Read assigned to Southern Illinois University Foundation A flotation process is disclosed for cleaning of particulate coal and separation therefrom of pyrite and ash. A flotation pulp is prepared com- prising a particulate coal feed material and an anionic surfactant selected from among alkanesulfonic acids, alkenesulfonic acids, alkynesulfonic acids, arenesulfonic acids, alkyl sulfuric acids, alkenyl sulfuric acids, alkynyl sul- furic acids, aryl sulfuric acids and salts of these acids. Among the particularly preferred surfac- tants are substituted ethenesulfonic acids and salts thereof. Other preferred embodiments in- clude the use of at least about 0.3 pound surfac- tant per ton of particulate feed material; implementation of the process via aggregate flotation, in which at least about 50~o by weight of the particulate coal feed material is smaller than about 400 mesh; and use of combinations of anionic surfactants and nonionic frothing a- gents. A novel composition of matter comprising the anionic surfactants adn a nonionic com- pound is also disclosed. 5028315 FROTH FLOTATION APPARATUS AND METHOD Ronald D Cruea, Michael Kinne, ,eladwolliW assigned to The Black Clawson Company In froth flotation apparatus for separating solid particle impurities from a liquid suspension stock in a flotation cell, provision is made for aerating the stock flowing through the inlet con- duit leading to the cell by positioning a drum- shaped rotor having an irregular outer surface in the conduit on an axis extending transversely of the conduit, directing a supply of air against the
Transcript of 5028315 Froth flotation apparatus and method
New Patents 1471
5015368
O R E F L O T A T I O N P R O C E S S U S I N G C A R B A M A T E
C O M P O U N D S
Biase Stephen Di, James H Bush assigned to The Lubrizol Corporation
The present invention relates to an improved process for beneficiating an ore. In particular, the process is useful for beneficiating ores and recovering metal values such as gold, copper, lead, molybdenum, zinc, etc., from the ores. In one embodiment, the process comprises (A) for- ming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is at least one carbamate represented by the formula: See Patent for Chemical Structure (I) wherein each R1 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R1 taken together with R2 and the nitrogen atom form a five, six or seven mem- ber heterocyclic group; each R2 is independently a hydrocarbyl group having from 1 to about 18 carbon atoms, or R2 taken together with R 1 and the nitrogen atom form a five, six or seven mem- ber heterocyclic group; and R3 is a hydrocarby- lene group having from 1 to about 10 carbon atoms; (B) subjecting the slurry from step (A) to froth flotation to produce a froth; and (C) recovering a mineral from the froth.
5021088
B I O H Y D R O M E T A L L U R G I C A L P R O C E S S I N G O F O R E S , A N D
M I C R O O R G A N I S M S T H E R E F O R
Ralph Portier assigned to Louisiana State University
A process for the separation and recovery from an ore of a metal, or metals, particularly strategic and precious metals, notably gold. A carbon- containing, gold-bearing ore, notably a car- bonaceous or carbonaceous pyritic ore, is contacted and microbially pretreated and leached with a heterotrophic microorganism, or admixture of microoganisms, at heterotrophic conditions to cultivate and grow and said micro- organism, or microorganisms, and reduce the carbon content of the ore by consumption of the carbon. The ore, as a result of the heterotrophic pretreatment is subsequently more advan- tageously colonized by an autotrophic micro- organism, or microorganisms, at autotrophic conditions, or hydrometallurgicaUy treated, or both, to facilitate, enhance and increase the
amount of gold recovered vis-a-vis a process wherein the gold is recovered (1) by hydro- metallurgical processing alone at otherwise similar conditions, or (2), in treating a pyritic ore, by the combination of the auto- trophic/hydrometallurgical processing, at other- wise similar conditions.
5022983
P R O C E S S F O R C L E A N I N G O F C O A L A N D S E P A R A T I O N O F
M I N E R A L M A T T E R A N D P Y R I T E T H E R E F R O M , A N D
C O M P O S I T I O N U S E F U L IN T H E P R O C E S S
Cal Y Myers, Richard Read assigned to Southern Illinois University Foundation
A flotation process is disclosed for cleaning of particulate coal and separation therefrom of pyrite and ash. A flotation pulp is prepared com- prising a particulate coal feed material and an anionic surfactant selected from among alkanesulfonic acids, alkenesulfonic acids, alkynesulfonic acids, arenesulfonic acids, alkyl sulfuric acids, alkenyl sulfuric acids, alkynyl sul- furic acids, aryl sulfuric acids and salts of these acids. Among the particularly preferred surfac- tants are substituted ethenesulfonic acids and salts thereof. Other preferred embodiments in- clude the use of at least about 0.3 pound surfac- tant per ton of particulate feed material; implementation of the process via aggregate flotation, in which at least about 50~o by weight of the particulate coal feed material is smaller than about 400 mesh; and use of combinations of anionic surfactants and nonionic frothing a- gents. A novel composition of matter comprising the anionic surfactants adn a nonionic com- pound is also disclosed.
5028315
F R O T H F L O T A T I O N A P P A R A T U S A N D M E T H O D
Ronald D Cruea, Michael Kinne, ,eladwolliW assigned to The Black Clawson Company
In froth flotation apparatus for separating solid particle impurities from a liquid suspension stock in a flotation cell, provision is made for aerating the stock flowing through the inlet con- duit leading to the cell by positioning a drum- shaped rotor having an irregular outer surface in the conduit on an axis extending transversely of the conduit, directing a supply of air against the
1472 New Patents
rotor surface on the upstream side of its rota- tional axis, and causing the rotor to rotate at a linear speed of its outer surface which is substan- tially higher than the linear flow rate of the stock in the conduit so that the rotor surface breaks up the air impinging thereon into bubbles and dist- ributes those bubbles in the stock flowing therepast to create foam within the cell.
5028398
DEVICE FOR PROVIDING A CONTINUOUS BIOLOGICAL
DECOMPOSITION OF MINERALS AND CONCENTRATES THEREOF
Rolf Hallberg, Ulf Edvardsson, S 135 55 Tyres Sweded
A lying rotatable drum for continuous bio- logical decomposition which includes at least one transversal partition for dividing the con- tainer interior into chambers. The partition has opening to transmit liquid between the cham- bers. Guide means are also provided.
5030426
BIOMINING OF GALLIUM AND GERMANIUM CONTAINING
ORES
Gail L A Bowers-Irons, John R Pease, Quynh K Tran, Tracy Gibb, Robert J Pryor, Sandr Had- dad assigned to Technical Research Inc
Disclosed is a high temperature process (e.g.)60 degrees C.) for leaching selected metal com- pounds e.g. gallium or germanium from ore con- taining those compounds. The method includes placing the ore into a culture medium containing bacteria. Bacteria capable of leaching the metal compounds from the ore leach the metals from the ore. The bacteria preferably used will be bac- teria ATCC 53921 and mutations and recom- binants thereof. The ore is generally crushed to between 20 and -400 mesh before placement into the culture medium containing bacteria.
and silver values from ore using activated carbon for adsorbing the values, wherein the activated carbon is treated with a suitable oxidant having an oxidation potential higher than that of oxy- gen. A preferred oxidant is potassium per- manganate. Activated carbon so treated has an enhanced affinity for adsorbing silver, even un- der conditions which traditionally have favored loading of carbon with gold.
5035365
THORTVEITITE ORE BENEFICIATION PROCESS
Scott D Birmingham assigned to Boulder Scien- tific Company
A thorteveitite ore beneficiation process which comprises comminuting the ore by wet auto- genuous grinding to substantially liberate the thortveitite contained therein, and passing the comminuted ore through a nonuniform magnetic field to produce a concentrate and a tailing, the concentrate containing a substan- tially greater percentage of thortveitite than the ore.
5035721
METHOD FOR BENEFICIATION OF LOW-RANK COAL
Linda Atherton assigned to Electric Power Research Institute Inc
A method is provided for removing moisture and improving the handling and storage charac- teristics or low-rank coal by demoisturizing the coal and rendering the coal surfaces hydro- phobic, separating the fines and agglomerating the fines in a slurry.
5034055
PROCESS FOR THE ENHANCED PRODUCTION OF SILVER FROM
GOLD AND SILVER BEARING ORE
John W Rowson, Saskatoon, Canada assigned to Cluff Mining
There is disclosed a process for recovering gold
5051165
QUALITY OF HEAVY MINERAL CONCENTRATES
William H Andrews, Waverley, Australia as- signed to Wimmera Industrial Minerals Pty Ltd
The specification discloses a process for substan- tially reducing the radioactivity of heavy mineral
