Method for recovering nickel in laterite nickel ore by tail gas
A technology for recovering laterite nickel ore and tail gas is applied in the field of metal smelting, which can solve problems such as damage to the ecological environment, and achieve the effect of improving the nickel recovery rate and solving the problem of low nickel recovery rate.
Active Publication Date: 2019-03-26
福州诚锦建筑工程劳务有限公司
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Problems solved by technology
[0008] The technical problem to be solved by the present invention is: use the tail gas produced by chlorination roasting to modify serpentine-shaped nickel ore and magnetic nickel tailings, improve the nickel recovery rate of laterite nickel ore treated by chlorination roasting combined with magnetic separation process, and Solve the problem that the generated tail gas and waste liquid damage the ecological environment
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[0018] In order to describe the technical content, achieved goals and effects of the present invention in detail, the following descriptions will be made in conjunction with the embodiments and accompanying drawings.
[0019] The key idea of the present invention is to modify the serpentine-like nickel ore and magnetic nickel tailings by using the tail gas produced by chlorination roasting to improve the nickel recovery rate of laterite nickel ore treated by chlorination roasting combined with magnetic separation process.
[0020] Please refer to figure 1 , the present invention provides a kind of method utilizing tail gas recovery laterite nickel ore nickel, the adopted technical scheme comprises the following steps:
[0021] Step 1: After the serpentine nickel ore is crushed and ground to below -50 mesh, it is stirred with magnetic nickel tailings to form a mixed ore.
[0022] Step 2: Send the tail gas produced by chlorination roasting into the flue gas absorption tower, ...
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Abstract
A method using exhaust gas to recover nickel from a lateritic nickel ore. The method comprises: crushing and grinding a serpentinized nickel ore, then mixing with a magnetic nickel tailing to obtain a mixed ore; homogeneously mixing a hydrochloric acid solution with the mixed ore to modify the mixed ore; homogeneously mixing the hydrochloric acid with quicklime powder to form a slurry additive; homogeneously mixing the modified mixed ore, the slurry additive, and a carbon-based reducing agent, then press-forming to form a semi-finished block; performing chlorination roasting on the semi-finished block followed by water quenching, then grinding a mineral powder, and finally separating nickel and iron fines and magnetic nickel tailings.
Description
technical field [0001] The invention relates to the technical field of metal smelting, in particular to a method for recovering nickel in laterite nickel ore by utilizing tail gas. Background technique [0002] Chlorination roasting refers to the process of mixing mineral raw materials with chlorinating agents, roasting under a certain temperature and atmosphere, and converting valuable metals into gas phase or condensed phase metal chlorides and separating them from other components of the material. Using the method of chlorination roasting combined with magnetic separation can effectively enrich nickel and iron elements in laterite nickel ore and separate them from non-magnetic gangue to obtain ferronickel fine powder, which is a low energy consumption and strong adaptability Laterite nickel ore refining process. [0003] Laterite nickel ore is also known as oxidized nickel ore. Most laterite nickel deposits with industrial significance are developed on peridotite bedrock...
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IPC IPC(8): C22B23/00C22B1/08C22B1/24C22B5/10
CPCC22B1/08C22B1/24C22B5/10C22B23/00
Inventor 李冀臻
Owner 福州诚锦建筑工程劳务有限公司