Method for removing calcium and magnesium from bioleaching solution of nickel cobalt by synergetic extraction method

Abstract

The invention provides a method for removing calcium and magnesium from a bioleaching solution of nickel cobalt by a synergetic extraction method. The method comprises the following steps: homogeneous saponification is separately carried out for a nickel cobalt extractant Versatic10 and a synergic extractant Cynaex301 by using a NaOH solution, and saponification rate is 40-60%; an organic phase is composed of a combined extractant and a diluent Mextral DT100; the combined extractant comprises 20-40V% of the synergic extractant Cynaex301 and 80-60V% of the extractant Versatic; the volume of the combined extractant is 10-30% of the total volume of the organic phase; when an initial pH value is 1.5-3.0, the organic phase and the bioleaching solution of nickel cobalt are mixed with shaking, the pH value is controlled at 3.0-4.0 for balancing extraction, and after standing, the organic phase and the aqueous phase are separated; sulfuric acid is added into the organic phase for back extraction of nickel cobalt, so that effective separation between nickel cobalt as well as calcium and magnesium is realized.

Description

technical field

[0001] The invention relates to a new process for removing calcium and magnesium in nickel-cobalt biological leachate by a co-extraction method. Background technique

[0002] Nickel-cobalt is one of the important raw materials for the construction of the national economy. With the development of the national economy, the demand for nickel-cobalt continues to increase, and the ore grade of nickel-cobalt mines is also declining. For some low-grade and refractory nickel-cobalt mines, traditional Smelting processes cannot economically process recycling. The microbial leaching technology has unique features in the treatment of low-grade ores, waste rocks, and polymetallic symbiotic ores that cannot be used by traditional metallurgical methods, and has the advantages of low process investment, low cost, high yield, less environmental pollution, and simple operation. Therefore, microbial leaching technology has a wide application value in the treatment of nickel-co...

Examples

Embodiment 1

[0021] The method of the present invention is applied to a certain nickel-cobalt ore bioleaching solution, and the composition of the nickel-cobalt bioleaching solution after iron removal is shown in Table 1.

[0022] Table 1 The main components of the leachate after iron removal

[0023]

[0024] process such as figure 1 As shown, the specific steps are as follows:

[0025] In step (1), the nickel-cobalt extractant Versatic10 and the co-extractant Cynaex301 are respectively subjected to homogeneous saponification with NaOH solution, the saponification rate is 60%, and the saponification time is 30 minutes;

[0026] In step (2), the organic phase is composed of a combined extractant and diluent MextralDT100, the co-extractant Cynaex301 is 30% (volume fraction), and the extractant Versatic10 is 70% (volume fraction). The combined extractant occupies 10% of the total volume of the organic phase, and the rest is the diluent MextralDT100.

[0027] Step (3), at a temperature ...

Embodiment 2

[0030] The method of the present invention is applied to the subsequent purification and removal of impurities from the bioleaching solution of a low-grade nickel-cobalt sulfide ore. The composition of the nickel-cobalt bioleaching solution after iron removal is shown in Table 2.

[0031] Table 2 The main components of the leachate after iron removal

[0032]

[0033] process such as figure 1 As shown, the specific steps are as follows:

[0034] In step (1), the nickel-cobalt extraction agent Versatic10 and the co-extraction agent Cynaex301 are respectively subjected to homogeneous saponification with NaOH solution, the saponification rate is 50%, and the saponification time is 30 minutes;

[0035] In step (2), the organic phase is composed of a combined extractant and diluent MextralDT100, the co-extractant Cynaex301 is 20% (volume fraction), and the extractant Versatic10 is 80% (volume fraction). The combined extractant occupies 20% of the total volume of the organic ph...

technical field

[0001] The invention relates to a new process for removing calcium and magnesium in nickel-cobalt biological leachate by a co-extraction method. Background technique

[0002] Nickel-cobalt is one of the important raw materials for the construction of the national economy. With the development of the national economy, the demand for nickel-cobalt continues to increase, and the ore grade of nickel-cobalt mines is also declining. For some low-grade and refractory nickel-cobalt mines, traditional Smelting processes cannot economically process recycling. The microbial leaching technology has unique features in the treatment of low-grade ores, waste rocks, and polymetallic symbiotic ores that cannot be used by traditional metallurgical methods, and has the advantages of low process investment, low cost, high yield, less environmental pollution, and simple operation. Therefore, microbial leaching technology has a wide application value in the treatment of nickel-co...

Examples

Embodiment 1

[0021] The method of the present invention is applied to a certain nickel-cobalt ore bioleaching solution, and the composition of the nickel-cobalt bioleaching solution after iron removal is shown in Table 1.

[0022] Table 1 The main components of the leachate after iron removal

[0023]

[0024] process such as figure 1 As shown, the specific steps are as follows:

[0025] In step (1), the nickel-cobalt extractant Versatic10 and the co-extractant Cynaex301 are respectively subjected to homogeneous saponification with NaOH solution, the saponification rate is 60%, and the saponification time is 30 minutes;

[0026] In step (2), the organic phase is composed of a combined extractant and diluent MextralDT100, the co-extractant Cynaex301 is 30% (volume fraction), and the extractant Versatic10 is 70% (volume fraction). The combined extractant occupies 10% of the total volume of the organic phase, and the rest is the diluent MextralDT100.

[0027] Step (3), at a temperature ...

Embodiment 2

[0030] The method of the present invention is applied to the subsequent purification and removal of impurities from the bioleaching solution of a low-grade nickel-cobalt sulfide ore. The composition of the nickel-cobalt bioleaching solution after iron removal is shown in Table 2.

[0031] Table 2 The main components of the leachate after iron removal

[0032]

[0033] process such as figure 1 As shown, the specific steps are as follows:

[0034] In step (1), the nickel-cobalt extraction agent Versatic10 and the co-extraction agent Cynaex301 are respectively subjected to homogeneous saponification with NaOH solution, the saponification rate is 50%, and the saponification time is 30 minutes;

[0035] In step (2), the organic phase is composed of a combined extractant and diluent MextralDT100, the co-extractant Cynaex301 is 20% (volume fraction), and the extractant Versatic10 is 80% (volume fraction). The combined extractant occupies 20% of the total volume of the organic ph...

Images