Title:
【発明の名称】チタン鉄鉱の分離方法
Document Type and Number:
Japanese Patent JP2606993
Kind Code:
B2
Abstract:
PCT No. PCT/AU91/00401 Sec. 371 Date Mar. 1, 1993 Sec. 102(e) Date Mar. 1, 1993 PCT Filed Aug. 28, 1991 PCT Pub. No. WO92/04121 PCT Pub. Date Mar. 19, 1992A process for enhancing ilmenite from deposits of mineral sands or mineral concentrates comprises a single stage fluidized bed magnetizing roast (16). A temperature of 650 DEG C.-900 DEG C. in an excess of a carbonaceous fuel (such as coal/char, CO or hydrocarbon) is used to provide an atmosphere in which the oxygen potential is controlled resulting in a consistently high magnetic susceptibility product. Roasting has been used before but the current process requires a lower intensity magnetic separation stage (18) and provides improved recovery (even of tailings produced by prior art roasting process). Annealing (17) of the roasted product improves the resultant magnetic susceptibility. Ilmenites having inclusions or selvedges of silicate minerals are further improved by employing a grinding step after magnetic separation prior to slagging or use as synthetic rutile feedstock. The roasting stage potentiates the ilmenite for leaching in the production of synthetic rutile.
Inventors:
Walpole Ernest Alan
Application Number:
JP51485891A
Publication Date:
May 07, 1997
Filing Date:
August 28, 1991
Export Citation:
Assignee:
Ostpack Gold N. L.
International Classes:
B03B1/02; B03B7/00; B03C1/00; B03C1/015; B03B5/28; C22B1/02; C22B5/10; C22B34/12; C22C1/00; (IPC1-7): B03C1/00; B03B5/28; C22B5/10
Domestic Patent References:
| JP5948852B2 | ||||
| JP56373B2 | ||||
| JP6311057B2 | ||||
| JP559450B2 |
Attorney, Agent or Firm:
Masaki Goto (1 person outside)