Method for recycling nickel in laterite-nickel ore by using tail gas
A laterite nickel ore and tail gas recovery technology, which is applied in the field of metal smelting, can solve the problems of destroying the ecological environment, achieve the effect of improving nickel recovery rate and solving the effect of low nickel recovery rate
Active Publication Date: 2016-09-28
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
The invention discloses a method for recycling nickel in laterite-nickel ore by using tail gas. The method comprises the following steps: crushing and grinding serpentine-shaped nickel ore, and mixing with magnetic nickel tailings to form a mixed ore; uniformly mixing a hydrochloric acid solution with the mixed ore, and then modifying the mixed ore; uniformly mixing the hydrochloric acid solution with quicklime powder to prepare a muddy additive; uniformly mixing the modified mixed ore, the muddy additive and a carbonaceous reducing agent and pressing into a semi-finished product block; carrying out chloridizing roasting on the semi-finished product block, then carrying out water quenching, and then grinding the mineral powder after water quenching and separating to obtain ferronickel fine powder and magnetic nickel tailings. According to the invention, waste gas produced by chloridizing roasting is used for modifying the serpentine-shaped nickel ore and the magnetic nickel tailings, so as to improve the nickel recovery rate of the laterite-nickel ore treated by combination of chloridizing roasting and a magnetic separation process, thus solving the problems of low nickel recovery rate of the serpentine-shaped nickel ore and the magnetic nickel tailings treated by combination of chloridizing roasting and the magnetic separation process in the prior art, and damage of the ecological environment caused by produced tail gas and waste liquid.
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...
Claims
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IPC IPC(8): C22B23/00C22B1/08C22B1/24C22B5/10
CPCC22B1/08C22B1/24C22B5/10C22B23/00C22B23/005
Inventor 李翼臻
Owner 福州诚锦建筑工程劳务有限公司