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Nickel Hydroxide Raw Iron Removal Process and Pneumatic Stirring Sedimentation Impurity Removal Tank Used

A technology of nickel hydroxide and pneumatic agitation, which is applied in the direction of improving process efficiency, etc., can solve problems such as insufficient oxygen contact, solution splashing and scalding, and pipeline blockage at the bottom of the tank, so as to achieve good iron removal effect and avoid agitation Effects of unevenness and increased oxygen intake

Active Publication Date: 2018-04-10
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the actual production operation, it was found that the one-way air inlet had uneven stirring, which was manifested in the nickel smelting process: Fe 2+ Insufficient contact with oxygen, Fe 2+ Convert Fe 3+ Incomplete, the iron removal effect is not good, and the pipeline at the bottom of the tank is often blocked by iron slag
The usual addition method, when using lye to adjust the pH, will cause problems such as local high pH and lead to nickel precipitation, and it is very dangerous for employees to use steel brazing to dredge the bottom of the tank, and it is prone to solution splashing and scalding injuries

Method used

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  • Nickel Hydroxide Raw Iron Removal Process and Pneumatic Stirring Sedimentation Impurity Removal Tank Used
  • Nickel Hydroxide Raw Iron Removal Process and Pneumatic Stirring Sedimentation Impurity Removal Tank Used
  • Nickel Hydroxide Raw Iron Removal Process and Pneumatic Stirring Sedimentation Impurity Removal Tank Used

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. Device:

[0028] Pneumatic agitation sedimentation and impurity removal tank, the main body of the tank includes a cylindrical reaction cylinder 10, a conical upper cover 11 and an inverted conical lower cover 12 integrated with it, the specification of the reaction cylinder 10 is φ2700×6500mm, The aspect ratio is 2.4. An exhaust tube 3 is installed at the apex of the conical upper cover 11, and a feed pipe 5, a steam pipe 6, a top compressed air inlet pipe 1, a high-pressure air atomizing spray gun 2 and an observation hole are installed on the side of the conical upper cover 11 4. The high-pressure air atomization spray gun 2 includes three ports: high-pressure air port, solution port and injection port, forming a "Y"-shaped structure, in which the high-pressure air port is connected to the top compressed air inlet pipe 1, and the injection port is set on the cone side of cover 11. The top of the inverted tapered lower cover 12 is connected with a vertical vertic...

Embodiment 2

[0043] 1. The device is the same as in Embodiment 1.

[0044] 2. Nickel hydroxide raw material iron removal process, the composition of the processed high-impurity nickel hydroxide raw material is shown in Table 4:

[0045] Table 4 embodiment two high-hetero nickel hydroxide raw material components (%)

[0046]

[0047] Among them, the above-mentioned device is used in the pneumatic agitation sedimentation and impurity removal tank, and the specific steps include:

[0048] A) Slurry the nickel hydroxide raw material with water, control the liquid-solid ratio to 3:1, and the slurrying time is 2h;

[0049] B) adding concentrated sulfuric acid to the raw material solution after slurrying, controlling the pH value at the end point of addition to 1.0, and leaching time for 3 hours;

[0050] C) Add the leaching solution into the air-driven agitation sedimentation and impurity removal tank, open the switch valves of the top compressed air inlet pipe 1 and the bottom compressed air...

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Abstract

The invention provides a nickel hydroxide raw material iron removing process and a pneumatic stirring and precipitating impurity removing tank adopting the nickel hydroxide raw material iron removing process. The nickel hydroxide raw material iron removing process includes the steps of pulpification, leaching and precipitation performed through a NaOH solution for impurity removal, wherein the iron content of the solution obtained after impurity removal is smaller than 0.001 g / L. According to the pneumatic stirring and precipitating impurity removing tank, an upper cover is provided with a top compressed air inflow pipe and a high-pressure air atomization spray gun. A lower cover is provided with a bottom compressed air inflow pipe. The manner that air flows in from the top and the bottom is adopted, stirring is more even, reactants make complete contact, and the lower cover is prevented from being blocked; and the high-pressure air atomization spray gun is arranged, so that feeding is more even, a reaction is performed faster and thoroughly, and when alkali liquor is added, the situation that the pH value of a local part is too high, so that a side reaction is generated is avoided.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgical precipitation and impurity removal, in particular to a reaction tank for pneumatically agitated reaction liquid, a reaction tank for removing impurities by forming precipitates, and a process for removing iron from high-impurity nickel hydroxide raw materials using the tank. Background technique [0002] Precipitation and impurity removal is to make the impurity metal in the solution form a precipitate to remove the impurity metal, which is a common method of impurity removal in the field of hydrometallurgy. The technique of nickel metal smelting in the prior art is: [0003] First, the nickel hydroxide raw material is leached with sulfuric acid, the pH value of the leaching end point is about 1.0, and the sulfuric acid leaching reaction is: Ni(OH) 2 +H 2 SO 4 =NiSO 4 +2H 2 O; Me(OH) 2 +H 2 SO 4 =MeSO 4 +2H 2 O; 2Me(OH) 3 +3H 2 SO 4 = Me 2 (SO 4 ) 3 +6H 2 O. Due to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/46C22B23/00
CPCY02P10/20
Inventor 周通耿文杰辛怀达吴玉明赵明郁张军来进平王瑞林王永贵崔文斌
Owner JINCHUAN GROUP LIMITED
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