Patent 1991079259

Method for extraction of valuable minerals and precious metals from oil sands ore bodies and other related ore bodies

Abstract

(12) PATENT ABRIDGMENT (11) Document No. AU-B-79259/91 (19) AUSTRALIAN PATENT OFFICE (10) Acceptance No. 625148 (54) Title METHOD FOR EXTRACTION OF VALUABLE MINERALS AND PRECIOUS METALS FROM OIL SANDS ORE BODIES AND OTHER RELATED ORE BODIES International Patent Classification(s) (51)5 C22B 011/00 ClOG 001/04 C22B 001/16 C22B 003/08 C22B 021/00 C22B 034/12 (21) Application No. 79259/91 (22) Application Date :21.06.91 Priority Data (31) Number (32) Date (33) Country 542723 22.06.90 US UNITED STATES OF AMERICA (43) Publication Date 02.01.92 (44) Publication Date of Accepted Application 02.07.92 (71) Applicant(s) SOLV-EX CORPORATION (72) Inventor(s) JOHN S. RENDALL; VALENTINE W. VAUGHN JR, (74) Attorney or Agent SPRUSON FERGUSON, GPO Box 3898, SYDNEY NSW 2001 (56) Prior Art Documents US 4816236 US 4495054 (57) Claim 1. A method for extracting valuable minerals and/or precious metals from oil sands ore bodies or only valuable minerals and/or precious metals from other related ore bodies containing little or no hydrocarbons, but similar to oil sands ore bodies when the overburden material and/or the Interburden material containing clay/fines lenses have common geological mineralization of aluminum values with iron, titanium and possible precious metals, comprising the steps of: a. developing a mine plan for the selective mining of said oil sands ore bodies or said other related ore bodies which contain little or no hydrocarbons to improve the precision of ore acquisition; b. procuring by selective mining oil sands ore with a cut-off grade greater than six weight percent of hydrocarbons hereinafter called oil sands ore, procuring overburden material and Interburden clay/fines lenses containing less than two weight percent hydrocarbons or no hydrocarbons hereinafter called mineral ores, and procuring other ores related geologically to said oil sands ores, but containing little or no hydrocarbons hereinafter called other related ores; c. crushing said oil sands ore from said oil sands ore bodies containing said valuable m1,raals and/or precious metals after removing oversize material, rock and waste, hereinafter called rejects, to yield a coarse sands stream of particles of a maximum size required for /2 (11) AU-B-79259/91 -2- 625148 processing; d. crushing and grinding said other related ores and/or said mineral ores hereinafter called ground mineral ores containing valuable minerals and precious metals after removing the rejects to yield a stream of particles of a maximum size required for processing; e. alternatively, combining said crushing step with said crushing and grinding means for ores having suitable geological mineralization; f. extracting the hydrocarbons, if the said oil sands ore contains greater than six weight percent hydrocarbons in a hydrocarbon extraction means, to produce a coarse sands fraction and a fines fraction both containing valuable minerals and precious metals; g. transferring said ground mineral ores to either a fines drying means, if needed, or otherwise directly to an agglomera.-ing section of an agglomerating, curing and leaching means; h. transferring said course sands fraction, if any, to a conventional precious metals flotation means to float a layer containing said precious metals and layers containing said hydrocarbons, if any, removing said layers as a precious metals and water stream and a hydrocarbons and water stream; i. transferring said coarse sands fraction, If any, less said precious metals and said hydrocarbons, If any, to a conventional heavy metals removal means for removal of heavy metals where said coarse sands stream less said precious metals, said hydrocarbons, if any, and said heavy metals is dewatered and stockpiled or returned to the mine as damp clean coarse sands for backfill; j. drying said fines fraction from said hydrocarbon extraction Smeans, if any, and drying said ground mineral ores stream from said crushing and grinding means, if said ground mineral ores stream requires drying, and transferring said fines fractions resulting from said hydrocarbon extraction means, if any, and the ground mineral ores stream to said agglomerating, curing and leaching means; k. mixing said fines, If aqy, and said ground mineral ores with a heavy minerals stream, if any, in said agglomerating, curing and leaching means; 1. agglomerating all said fines, If any, said ground mineral ores and said heavy mineral streams, If any, with concentrated sulphuric acid, curing the agglomerated material with steam, air drying If required and leaching said agglomerated materlal In said agglomerating, curing and ,/3 Invention from lhe inventor(s) Ii4. The basic application(s- referred to in paragraph 2 of this Declaration was/wer- the first application() made in a Conventiont country in respect of the invention(-) the subject of the application. Declared at Abuquerquthis day o r May 19-91New Mexico S P4 To: The Comm.iono, r f (11) AU-B-79259/91 625148 leaching means; m. recycling water as a leaching agent between a leaching section of said agglomerating, curing and leaching means and a sulphuric acid leach liquor crystal production and removal means, after a predetermined period of time, said circulated water becomes sulphuric acid leach mother liquor containing the valuable minerals; n. processing said sulphuric acid leach mother liquor containing the valuable minerals is accomplished with conventional equipment in a sulphuric acid leach liquor crystal production and removal means to produce aluminum sulphate crystals, ferric/ferrous sulphate crystals and titanyl sulphate crystals, if needed, while recycling raffinate liquor; o. said aluminum sulphate crystals are converted by conventional processes to cell grade alumina product in an alumina production means and optionally processing this alumina by the conventional Hall process for aluminum production; p. alternatively, in 7n alternative aluminum production means an aluminum chloride method may be used to produce the metal aluminum in electrolytic cells while chlorine is recycled; q. said ferric/ferrous sulphate crystals are converted by conventional processes to ferric oxide crystals; r. said ferric oxide crystals are converted by conventional processes to iron powder, iron pellets or Iron plates, if needed, as products in an iron production means; s. said titanyl sulphate crystals are converted by conventional processes to titanium dioxide pigment or titanium sponge metal in a titanium products production means; t. washing said agglomerated material with water after valuable minerals extraction and neutralizing with lime if the subsequent step of precious metals production utilizes sodium cyanide leaching; u. leaching with sodium cyanide and water with air injection into the leach liquor to remove said precious metals from the neutralized substantially mineral free said agglomerated material to produce the precious metals leach mother liquor, then transferring said precious metals leach mother liquor to the precious metals production means and treating said precious metals leach mother liquor conventionally to produce precious metals such as gold and/or silver while recycling the raffinate liquor; ii4t r i I r;I I~t-~ B (11) AU-B-79259/91 625148 v. neutralizing liquor is then circulated before the remaining spent neutralized said agglomerated mat(rial Is removed for transportation to backfill storage or the mine; w. the heat and sulphur containing gases generated In said valuable metals production means are used in a SO2 recovery and H2S04 production means to recycle the sulphuric compounds in the process and furnish heat to cogeneration means for process steam and electricity production. 28. Alumina, iron, titanium and compounds thereof, gold, silver and/or platinum, whenever extracted from oil sands ore bodies or other related ore bodies containing little or no hydrocarbons by a method of any one of claims 1 to 27. ~i~clw i_

Information

Australian application number
1991079259
Country
US
Status
Ceased
Type
Standard
Applicant
Solv-Ex Corporation, CORP (US)
Application year
1991

International Patent Classification (IPC) codes