Title:
METHOD OF CONCENTRATING NICKEL IN SAPROLITE ORE
Document Type and Number:
WIPO Patent Application WO/2010/032513
Kind Code:
A1
Abstract:
A method of nickel concentration is provided which is inexpensive and simple and is reduced in environmental burden. By using the method, saprolite ore of a low nickel grade, which has not hitherto been effectively used as a raw material for ferro-nickel smelting because of the low nickel grade, can be improved in nickel grade to such a level that the ore can be profitably used as a raw material for ferro-nickel smelting.
The method is characterized by comprising the following steps (1) to (4).
(1) Saprolite ore is crushed to regulate the ore particle size so that the ore particles pass through a screen having an opening size of 50 mm.
(2) Surface layer parts of the crushed ore are subjected to dry attrition.
(3) The attrited ore is subjected to dry classification using, as a classification point, a size selected from the range of from 0.5 to 2.0 mm, and that part of the ore which has a particle size not larger than the classification point is then recovered as a nickel concentrate.
(4) That part of the ore which has a particle size exceeding the classification point is subjected to dry gravity separation, and that part of the ore which has a specific gravity not higher than 2.0 is then recovered as a nickel concentrate.
Inventors:
NAKAMURA Iichi (C/O Engineering Department, Mineral Resources Div. SUMITOMO METAL MINING CO., LTD., 11-3, Shimbashi 5-chome, Minato-k, Tokyo 16, 〒1058716, JP)
中村 威一 (〒16 東京都港区新橋５－１１－３ 住友金属鉱山株式会社 資源事業部内 Tokyo, 〒1058716, JP)
中村 威一 (〒16 東京都港区新橋５－１１－３ 住友金属鉱山株式会社 資源事業部内 Tokyo, 〒1058716, JP)
Application Number:
JP2009/058450
Publication Date:
March 25, 2010
Filing Date:
April 30, 2009
Export Citation:
Assignee:
SUMITOMO METAL MINING CO., LTD. (11-3, Shimbashi 5-chome Minato-k, Tokyo 16, 〒1058716, JP)
住友金属鉱山株式会社 (〒16 東京都港区新橋五丁目１１番３号 Tokyo, 〒1058716, JP)
NAKAMURA Iichi (C/O Engineering Department, Mineral Resources Div. SUMITOMO METAL MINING CO., LTD., 11-3, Shimbashi 5-chome, Minato-k, Tokyo 16, 〒1058716, JP)
住友金属鉱山株式会社 (〒16 東京都港区新橋五丁目１１番３号 Tokyo, 〒1058716, JP)
NAKAMURA Iichi (C/O Engineering Department, Mineral Resources Div. SUMITOMO METAL MINING CO., LTD., 11-3, Shimbashi 5-chome, Minato-k, Tokyo 16, 〒1058716, JP)
International Classes:
C22B23/00; B07B1/00; B07B4/08; B07B9/00
Attorney, Agent or Firm:
KAWABI Kenji (Higashi-ikebukuro Orimoto Bldg, 6th floor 9-7, Higashi-ikebukuro 3-chome, Toshima-k, Tokyo 13, 〒1700013, JP)