A kind of processing method of copper-cobalt ore

Abstract

The invention belongs to the technical field of hydrometallurgy, and specifically proposes a copper-cobalt ore treatment process. In this treatment process, after the copper-cobalt ore is pre-leached, the leaching solution is used as a stripping agent in the acid recovery system of the solvent extraction method; the recovered sulfuric acid solution is used for pre-leaching the copper-cobalt ore, and so on. Heap leaching can also be used to replace the copper-cobalt ore pre-leaching, the recovered sulfuric acid solution can be returned to the heap leaching, the swelling water can be evaporated by heap leaching, and new water can be added as the stripping agent for the acid recovery system by the solvent extraction method. The process of the invention is simple, can greatly reduce the loss of sulfuric acid and the consumption of alkaline substances such as limestone / lime, does not cause water expansion in the system, does not discharge waste water, and can realize the process flow of circulation.

Description

technical field

[0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for processing copper-cobalt ore. Background technique

[0002] In the process of extracting copper and cobalt from copper-cobalt associated ore, in order to reduce the loss of copper, cobalt is generally extracted from copper raffinate. Copper raffinate contains H 2 SO 4 and Fe 2+ , Fe 3+ , Mn 2+ 、Al 3+ and other metal ions, in order to obtain cobalt products that meet the quality requirements, limestone or lime neutralization is generally used to remove most of the Fe 2+ , Fe 3+ , Mn 2+ 、Al 3+ After waiting for the metal ions, the extraction of cobalt is carried out. This method consumes a large amount of limestone or lime, and the sulfuric acid cannot be efficiently recycled. In areas with high limestone, lime and sulfuric acid prices, the consumption of alkaline neutralizers and sulfuric acid becomes the main cost of cobalt production.

[0003] Re...

Examples

Embodiment 1

[0026] Sulfuric acid recovery and lime consumption reduction test in a copper-cobalt ore hydrometallurgy plant.

[0027] Copper-cobalt associated ore, low-copper raffinate is used as raw material of cobalt system to produce crude cobalt hydroxide, and iron removal process consumes a lot of lime. The composition of the low-copper raffinate is as shown in Table 1:

[0028] Table 1 Components of low-copper raffinate

[0029] name Cu(g / L) Co (g / L) Fe(g / L) Mn(g / L) h 2 SO 4 (g / L)

Flow (m 3 / d)

Low Copper Raffinate 0.12 4.32 3.21 2.75 18.50 8500

[0030] The iron removal process must first neutralize free sulfuric acid, which not only increases lime consumption, but also cannot recycle sulfuric acid. Lime consumption is 25kg / m 3 Low copper raffinate, in which lime used to neutralize sulfuric acid exceeds 42% of total consumption.

[0031] This embodiment adopts as figure 1 The process flow diagram shown.

[0032] Test plan: Most of...

Embodiment 2

[0042] Sulfuric acid recovery, reduction of lime consumption and heap leaching test of low-grade copper ore in a copper-cobalt ore hydrometallurgy plant.

[0043] Copper-cobalt associated ore can be divided into stirring leaching and heap leaching. Stirring and leaching treatment of high-copper and low-cobalt (Cu greater than 1.5%, Co> 0.2%) ores, the products are cathode copper and crude cobalt hydroxide, and the low-copper raffinate is used as the raw material of the cobalt system to produce crude cobalt hydroxide; heap leaching treatment Low-copper and low-cobalt (Cu<1.5%, Co<0.2%) ore, the product is cathode copper, and no crude cobalt hydroxide is produced. The low-copper raffinate composition is as shown in Table 3:

[0044] Table 3 Components of low-copper raffinate

[0045] name Cu(g / L) Co (g / L) Fe(g / L) Mn(g / L) h 2 SO 4 (g / L)

[0046] The iron removal process must first neutralize free sulfuric acid, which not only increases lime consumption, ...

technical field

[0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for processing copper-cobalt ore. Background technique

[0002] In the process of extracting copper and cobalt from copper-cobalt associated ore, in order to reduce the loss of copper, cobalt is generally extracted from copper raffinate. Copper raffinate contains H 2 SO 4 and Fe 2+ , Fe 3+ , Mn 2+ 、Al 3+ and other metal ions, in order to obtain cobalt products that meet the quality requirements, limestone or lime neutralization is generally used to remove most of the Fe 2+ , Fe 3+ , Mn 2+ 、Al 3+ After waiting for the metal ions, the extraction of cobalt is carried out. This method consumes a large amount of limestone or lime, and the sulfuric acid cannot be efficiently recycled. In areas with high limestone, lime and sulfuric acid prices, the consumption of alkaline neutralizers and sulfuric acid becomes the main cost of cobalt production.

[0003] Re...

Examples

Embodiment 1

[0026] Sulfuric acid recovery and lime consumption reduction test in a copper-cobalt ore hydrometallurgy plant.

[0027] Copper-cobalt associated ore, low-copper raffinate is used as raw material of cobalt system to produce crude cobalt hydroxide, and iron removal process consumes a lot of lime. The composition of the low-copper raffinate is as shown in Table 1:

[0028] Table 1 Components of low-copper raffinate

[0029] name Cu(g / L) Co (g / L) Fe(g / L) Mn(g / L) h 2 SO 4 (g / L)

Flow (m 3 / d)

Low Copper Raffinate 0.12 4.32 3.21 2.75 18.50 8500

[0030] The iron removal process must first neutralize free sulfuric acid, which not only increases lime consumption, but also cannot recycle sulfuric acid. Lime consumption is 25kg / m 3 Low copper raffinate, in which lime used to neutralize sulfuric acid exceeds 42% of total consumption.

[0031] This embodiment adopts as figure 1 The process flow diagram shown.

[0032] Test plan: Most of...

Embodiment 2

[0042] Sulfuric acid recovery, reduction of lime consumption and heap leaching test of low-grade copper ore in a copper-cobalt ore hydrometallurgy plant.

[0043] Copper-cobalt associated ore can be divided into stirring leaching and heap leaching. Stirring and leaching treatment of high-copper and low-cobalt (Cu greater than 1.5%, Co> 0.2%) ores, the products are cathode copper and crude cobalt hydroxide, and the low-copper raffinate is used as the raw material of the cobalt system to produce crude cobalt hydroxide; heap leaching treatment Low-copper and low-cobalt (Cu<1.5%, Co<0.2%) ore, the product is cathode copper, and no crude cobalt hydroxide is produced. The low-copper raffinate composition is as shown in Table 3:

[0044] Table 3 Components of low-copper raffinate

[0045] name Cu(g / L) Co (g / L) Fe(g / L) Mn(g / L) h 2 SO 4 (g / L)

[0046] The iron removal process must first neutralize free sulfuric acid, which not only increases lime consumption, ...

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