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Nickel hydroxide and preparation method thereof

A technology of nickel hydroxide and magnesium oxide, applied in the field of hydrometallurgy, can solve the problem of high cost of nickel hydroxide, and achieve the effects of high nickel content in products, simple process flow and low cost

Pending Publication Date: 2021-12-28
贵州中伟资源循环产业发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a kind of nickel hydroxide and its preparation method, aiming to solve the problem of high cost of the existing magnesium oxide precipitated nickel hydroxide

Method used

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  • Nickel hydroxide and preparation method thereof
  • Nickel hydroxide and preparation method thereof
  • Nickel hydroxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The present application provides a method for preparing nickel hydroxide, see figure 1 and figure 2 ,include:

[0034] Step: laterite nickel ore under high pressure acid leaching of nickel sulfate solution obtained.

[0035] Specifically, after the use of laterite nickel ore by crushing, washing, pulp concentration, etc. Step concentrated sulfuric acid and a high pressure acid leaching and other Fe-Al to give the nickel sulfate solution, nickel sulfate solution containing nickel ions mainly, as well as some cobalt ions and manganese ion.

[0036] Step two: the low activity magnesium oxide wet grinding using a ball mill handled magnesia slurry, wet milling process the volume ratio of ball to powder (30 to 50): 1, the volume of liquid to solid ratio (2 to 5): 1, wet milling time 0.5 ~ 3.0h.

[0037] Specifically, the active magnesium oxide chemical composition, physical form like ordinary index and MgO is not much difference, but some indicators active magnesium oxide and mag...

Embodiment 1

[0062] The red soil nickel ore is shown in high pressure acid immersion and iron aluminum to obtain a nickel sulfate solution component as shown in Table 1 below.

[0063] Table 1 Nickel sulfate solution ingredients

[0064] Ni g / L Fe g / L Al CO Mn pH 3.51 0.002 0.003g / L 0.42 0.57 4.4

[0065] "Active -40" magnesium oxide (66mgi) 2 / Gmgo, a heap density of 0.10 g / ml, MgO92.3%) The spherical mill is wet milling, the liquid solid volume ratio 4: 1, the spherical volume ratio 40: 1, the abrasive 2H, and the abrasive are obtained to obtain magnesia slurry.

[0066] The magnesium oxide slurry is slowly pumped into the sink contained in the sulfate solution, and the nickel tank pH to 7.5 is adjusted, and the stirring reaction is stably stirred from the sink.

[0067] After the reaction, the sink is separated by the pressure filtrate to obtain a sinking liquid and a nickel hydroxide cake, and the nickel hydroxide cake is sent to the drying step to obtai...

Embodiment 2

[0071] For the nickel sulfate solution of Example 1.

[0072] "Active-60" magnesium oxide (69mgi) 2 / Gmgo, a heap density of 0.14 g / ml, MgO 92.47%) The spherical mill wet milling treatment, the liquid solid volume ratio is 5: 1, the spherical volume ratio 35: 1, the abrasive 3H, and the abrasive are obtained to obtain magnesia slurry.

[0073] The magnesium oxide slurry is slowly pumped into the sulphic tank with a nickel sulfate solution, and the nickel tank pH to 8.0 is adjusted, and the stirring reaction is stably stirred 4H to obtain a sketch slurry.

[0074] After the reaction, the sinking of the sink is separated by the pressure filtrate to obtain a silicon hydroxide and a nickel hydroxide cake, and a nickel hydroxide cake is sent to the drying step to obtain a nickel hydroxide product of Example 2.

[0075] Composite organic LD-1MS with a volume concentration of 30% and a silicon reactation reaction, LD-1MS and (Ni + CO + Mn) mass ratio = 1.04: 1, after the reaction was ...

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Abstract

The invention provides nickel hydroxide and a preparation method thereof. According to the preparation method of the nickel hydroxide, heavy-burned magnesia is adopted as a nickel precipitation alkali source auxiliary material, the heavy-burned magnesia is subjected to wet grinding pretreatment through the ball-material volume ratio of (30-50): 1, the liquid-solid volume ratio of (2-5): 1 and the wet grinding time of 0.5-3.0 h, the activity of the heavy-burned magnesia is improved, and the nickel precipitation effect of high-activity magnesium oxide can be achieved; and compared with a high-activity magnesium oxide auxiliary material, the heavy-burned magnesia is low in cost, the technological process is simple, and the product is high in nickel content.

Description

Technical field [0001] The present application relates to hydrometallurgy, and in particular relates to a method for preparing nickel, and hydroxide. Background technique [0002] With nickel sulfide ore resources are depleting, resource efficient development accounted for 60% of global nickel laterite nickel ore increasingly urgent. Hydrometallurgical nickel laterite leaching generally used sulfuric acid, Ni, Co, Mn, Al, Mg and other metal extraction to the solution, and then through a series of preliminary purification process to purify nickel sulfate solution; nickel sulfate solution for the current nickel recovery commonly used sodium hydroxide precipitation, but the high alkalinity of sodium hydroxide, in the actual production is likely to cause precipitation tank overbased phenomenon, most of the impurities precipitate together with the product into the reduced nickel hydroxide Nickel main content, while the presence of a small particle size precipitate was filtered difficu...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B3/08C22B23/00
CPCC22B3/44C22B3/08C22B23/043Y02P10/20
Inventor 王博宇刘增威胡石春肖超訚硕
Owner 贵州中伟资源循环产业发展有限公司
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