A kind of refining method of copper smelting by-product crude nickel sulfate
A refining method and nickel sulfate technology, applied in nickel sulfate and other directions, can solve the problems of low impurity removal rate, long production cycle, easy generation of toxic gas, etc., and achieve remarkable separation effect, less loss of nickel, and low refining cost. Effect
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Embodiment 1
[0024] Dissolve crude nickel sulfate with water at a mass ratio of 3:1. The main components of solid crude nickel sulfate are shown in Table 1, and the main components of the prepared crude nickel sulfate solution are shown in Table 2.
[0025] Table 1 Main components of crude nickel sulfate (wt%)
[0026]
[0027] Table 2 Mass concentration of main elements in crude nickel sulfate solution (unit: g / L)
[0028]
[0029] (1)Na 2 S 2 O 3 Selective precipitation of copper
[0030] Take 300mL of crude nickel sulfate solution, Na 2 S 2 O 3 The molar ratio is 3, the initial pH of the solution is 0.5, the reaction temperature is controlled to 85°C, and the reaction time is about 2h. After the copper sink is filtered, the precipitation rate of Cu is 99.97%, and the loss rate of nickel is only 0.78%.
[0031] The main components of the filtrate: As0.454g / L, Ca1.482g / L, Co0.108g / L, Cu0.0017g / L, Fe2.614g / L, Mg2.597g / L, Ni44.252g / L, Zn1.296g / L.
[0032] (2) One-step precipitation to remove iron, ...
Embodiment 2
[0047] Dissolve crude nickel sulfate with water at a mass ratio of 3:1. The main components of solid crude nickel sulfate are shown in Table 4, and the main components of the prepared crude nickel sulfate solution are shown in Table 5.
[0048] Table 4 Main components of crude nickel sulfate (wt%)
[0049]
[0050] Table 5 Mass concentration of main elements in crude nickel sulfate solution (unit: g / L)
[0051]
[0052] (1)Na 2 S 2 O 3 Selective precipitation of copper
[0053] Take 300mL of crude nickel sulfate solution, Na 2 S 2 O 3 The molar ratio is 3, the initial pH of the solution is 0.5, the reaction temperature is controlled to 85°C, and the reaction time is about 2h. After the copper is deposited and filtered, the precipitation rate of Cu is 100%, and the loss rate of nickel is only 0.80%.
[0054] The main components of the filtrate: As0.100g / L, Ca1.679g / L, Co0.058g / L, Cu0.0001g / L, Fe1.030g / L, Mg1.69g / L, Ni65.47g / L, Zn0.758g / L.
[0055] (2) One-step precipitation to remove i...
Embodiment 3
[0071] Dissolve crude nickel sulfate with water at a mass ratio of 3:1. The main components of solid crude nickel sulfate are shown in Table 7, and the main components of the prepared crude nickel sulfate solution are shown in Table 8.
[0072] Table 7 Main components of crude nickel sulfate (wt%)
[0073]
[0074] Table 8 Mass concentration of main elements in crude nickel sulfate solution (unit: g / L)
[0075]
[0076] (1)Na 2 S 2 O 3 Selective precipitation of copper
[0077] Take 300mL of crude nickel sulfate solution, Na 2 S 2 O 3 The molar ratio is 3, the initial pH of the solution is 0.5, the reaction temperature is controlled to 85°C, and the reaction time is about 2h. After the copper is deposited and filtered, the precipitation rate of Cu is 99.94%, and the loss rate of nickel is only 0.75%.
[0078] The main components of the filtrate: As0.743g / L, Ca0.981g / L, Co0.070g / L, Cu0.0007g / L, Fe3.602g / L, Mg1.307g / L, Ni58.172g / L, Zn0.837g / L.
[0079] (2) One-step precipitation to remo...
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