Title:
A PROCESS FOR RECYCLING NI AND CO FROM NICKEL OXIDE ORE OR NICKEL SILICATE ORE
Document Type and Number:
WIPO Patent Application WO/2007/109976
Kind Code:
A1
Abstract:
A process for recycling Ni and Co from nickel oxide ore or nickel silicate ore, comprises the following steps: grinding nickel oxide or nickel silicate raw ore so that 80-90wt% of the ore has a grain size of -200 mesh; adding coke powder 5-15%, chlorating agent 10-30% and auxiliary 0.1-1.0% based on the weight of the raw ore; pelletizing to obtain pellets with a grain size of 5-15 mm; drying; calcining the dried pellets in a rotary kiln for segregation for 1-2 hours, in which the temperature of high temperature zone of the kiln is controlled at 1000-1300 °C, the exit temperature of the kiln is 400-600 °C, rotation rate is 0.75-2 revolution per minute; then separating the product which has been water-quenched in a magnetic separator with a magnetic field intensity of 1500-3000G, and eventually obtaining a Ni-Co concentrate mixture in which nickel grade is 5-15%, recovery of Ni is 80-85%, cobalt grade is 0.3-1.7% and recovery of Co is 70-80%.
Inventors:
ZHANG YU (CN)
CHENG XIAOMING (CN)
CHENG XIAOMING (CN)
Application Number:
PCT/CN2007/000783
Publication Date:
October 04, 2007
Filing Date:
March 12, 2007
Export Citation:
Assignee:
ZHANG YU (CN)
CHENG XIAOMING (CN)
CHENG XIAOMING (CN)
International Classes:
C22B23/00; B03C1/02; C22B1/08
Foreign References:
| JPS4630381B1 | ||||
| US3904400A | 1975-09-09 | |||
| CN2325401Y | 1999-06-23 | |||
| US3871873A | 1975-03-18 | |||
| JPS4911290B1 | 1974-03-15 | |||
| SU749925A1 | 1980-07-23 |
Other References:
KUMMING METALLURGY INSTITUTE: "A Process for Segragating A Nickel Silicate Ore", YUNNAN METALLURGY, no. 6, 1976, pages 18 - 27
Attorney, Agent or Firm:
SHANGHAI ZHI XIN PATENT AGENT LTD. (1223 Xie Tu Road, Shanghai 2, CN)
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