In a method of recovering a transition metal from a lithium secondary battery, a an acidic solution is added to a recovery target material containing a transition metal to form a leachate. A basic compound is added to the leachate in an amount of 0.5 wt % to 1.9 wt % based on a total weight of the leachate to form a first transition metal solution. A fluorine compound is added to the first transition metal solution to form a second transition metal solution.

A mineral recovery solution may include a liquid or supercritical carbon dioxide component. The mineral recovery solution may include a water component. The mineral recovery solution may include a chelator component.

The present disclosure relates to a process and system for recovery of one or more metal values using solution extraction techniques and to a system for metal value recovery. In an exemplary embodiment, the solution extraction system comprises a first solution extraction circuit and a second solution extraction circuit. A first metal-bearing solution is provided to the first and second circuit, and a second metal-bearing solution is provided to the first circuit. The first circuit produces a first rich electrolyte solution, which can be forwarded to primary metal value recovery, and a low-grade raffinate, which is forwarded to secondary metal value recovery. The second circuit produces a second rich electrolyte solution, which is also forwarded to primary metal value recovery. The first and second solution extraction circuits have independent organic phases and each circuit can operate independently of the other circuit.

A method for the lagoon-based bioleaching of a metallic ore, wherein the temperature of the suspension containing the metallic ore to be bioleached, a bioleaching consortium and a nutritive substrate of the microorganisms of the consortium is controlled by regulating the flows and the composition of a gas containing oxygen and optionally also CO2 injected into the suspension, the temperature of the suspension being controlled such that it can be maintained within a pre-determined range suitable for bioleaching.

A method of recovering a metal from a low-grade ore which is subjected to cyanide leaching to produce a PLS which contains a metal cyanide which is removed from the PLS by ultrafiltration and nano-filtration, and then acidified and sulphidised to produce a metal sulphide from which the metal is extracted, and hydrogen cyanide which is recycled to the cyanide leaching step.

A nickel recovering method includes: (A-i) a reduction heat treatment process for thermally treating a first raw material containing nickel and lithium; (B) a first leaching process for leaching the heat-treated product produced by the reduction heat treatment process; (A-ii) a first roasting process for thermally treating a second raw material containing nickel and sulfur; (C) a second leaching process for leaching the first leaching residue produced by the first leaching process and calcine produced by the first roasting process; (D) a neutralization process for neutralizing the second leachate produced by the second leaching process; (E) a purification process for removing impurities contained in the neutralized solution produced by the neutralization process; (F) a precipitation process for performing precipitation on the purified solution produced by the purification process; and (G) a second roasting process for roasting the precipitated residue produced by the precipitation process to recover nickel.

Provided herein is a nickel recovering method, comprising: (A-i) a reduction heat treatment process for thermally treating a first raw material containing nickel and lithium; (B) a first leaching process for leaching the heat-treated product produced by the reduction heat treatment process; (A-ii) a roasting process for thermally treating a second raw material containing nickel and sulfur; (C) a second leaching process for leaching the first leaching residue produced by the first leaching process and calcine produced by the roasting process; (D) a neutralization process for neutralizing the second leachate produced by the second leaching process; (E) a purification process for removing impurities contained in the neutralized solution produced by the neutralization process; and (F) a reduction process for performing a hydrogen reduction method on the purified solution produced by the purification process to recover nickel from the purified solution.

Provided herein is a nickel recovering method, comprising: (A-i) a reduction heat treatment process for thermally treating a first raw material containing nickel and lithium; (B) a first leaching process for leaching the heat-treated product produced by the reduction heat treatment process; (A-ii) a roasting process for thermally treating a second raw material containing nickel and sulfur; (C) a second leaching process for leaching the first leaching residue produced by the first leaching process and calcine produced by the roasting process; (D) a neutralization process for neutralizing the second leachate produced by the second leaching process; (E) a purification process for removing impurities contained in the neutralized solution produced by the neutralization process; and (F) a precipitation process of performing a precipitation method to recover nickel from the purified solution produced by the purification process, and a nickel hydroxide is recovered by the precipitation process.

The exemplary embodiments relate to a valuable metal recovery alloy, a valuable metal recovery composition, and a valuable metal recovery method.

According to an exemplary embodiment, the valuable metal recovery alloy may include, based on 100 wt % of the total composition of an alloy, a valuable metal of 45 wt % and a remainder which is impurities, and the valuable metal recovery alloy may satisfy Equation 1 below.

[00001]$\begin{array}{cc}0.02\left[C\right]/\left[\mathrm{Ni}\right]7& .Math.\mathrm{Equation}1.Math.\end{array}$

([C] and [Ni] mean wt % of C and wt % of Ni, respectively)

Provided are an impurity-element removing method for selectively removing magnesium from a nickel-containing solution, and a method for producing high-purity nickel sulfate using the impurity-element removing method. The production method includes a production process in the production method of producing high-purity nickel sulfate from a nickel-containing solution, and the nickel-containing solution in the production process is subjected to an impurity-element removal treatment that includes: a hydroxylation step of adding an alkali hydroxide to the nickel-containing solution in the production process to form a hydroxylated slurry; a carbonation step of adding an alkali carbonate to the hydroxylated slurry to form a carbonated slurry, and recovering nickel component from the solution; a solid-liquid separation step for the slurry thus obtained; and a neutralization step of subjecting a solution after reaction obtained by solid-liquid separation to a neutralization, and recovering an impurity element included in the nickel-containing solution in the production process.