Method for preparing cupric sulfate from spongy copper and copper-containing acid pickle

Abstract

The invention relates to a method for preparing copper sulfate by adopting sponge cooper and the waste acid liquid containing cooper as raw materials. The invention is characterized in that (1) sponge cooper and the cooper containing waste acid liquid, after acid adjustment, are emulsified and mixed; then leaching reaction is carried out; (2) the leached liquid is extracted by using P204, and then cooper and nickel are separated from part of impurities; (3) under the help of sulphuric acid, reverse extraction is carried out to the extraction liquid P204, the oil in the reverse extract liquid and extraction raffinate is removed; (4) cooper sulphate solution, after oil removal and purification, is concentrated by steam, crystallized and dried; then the final product cooper sulphate crystal is obtained. The method of the invention has the advantages of good separation effect of cooper and nickel, being capable of fully making use of nonferrous smelting intermediate residue with complex components and the waste acid liquid containing cooper to produce high quality cooper sulphate and reclaim valuable metal nickel, thus achieving resources comprehensive utilization.

Description

technical field

[0001] The invention discloses a method for preparing copper sulfate by using sponge copper and copper-containing waste acid liquid as raw materials, and relates to a method for preparing copper sulfate by using sponge copper and copper-containing waste acid liquid produced by copper-nickel smelting and refining as raw materials. Background technique

[0002] At present, the main production processes for the production of copper sulfate are: 1. Using red copper as raw material, leaching with dilute sulfuric acid after being calcined into copper oxide, and then concentrating and crystallizing the solution to obtain copper sulfate; this method has a complicated process and labor-intensive Large, high energy consumption; 2. The production process of producing copper sulfate from copper sulfide ore, including mineral powder roasting, calcined copper leaching, cooling crystallization and other processes, the total yield of copper sulfate can reach more than 96%; 3...

Examples

Embodiment 1

[0030] (Take a single 2t / d copper melter as an example)

[0031] Will contain Cu: 62.6%, Ni: 3.2%, Fe: 0.05%, Pb: 0.02%, Ca: 0.32%, As: 0.35%, Sb: 0.026%, Bi: 0.019%, S: 2.5%, Cl: 2.2 % Dry sponge copper is ground to -10 mesh (equivalent to 0.016mm), which accounts for 90%. Use a screw feeder to continuously add at a speed of 220kg / h, and pump in Cu-containing 2+ :32g / l, containing H 2 SO 4 :120g / l pre-leaching solution, with 0.65m 3 / h speed continuously added to the copper melter. The reaction temperature is controlled at about 80°C. Continuous leaching to contain Cu 2+ :97g / l, H 2 SO 4 :26g / l leaching solution 0.65m 3 / h. After one filter press, add Na to the inlet and outlet liquids 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40~70℃, PH: 2.0. After the second press filter, add water to dilute to contain Cu 2+ :63g / l, containing Ni 2+ :20g / l, after three filter presses, use extractant P 204 Carry out multi-stage countercurrent extraction and d...

Embodiment 2

[0033] (Take a single 2t / d copper melter as an example)

[0034] Will contain Cu: 60.5%, Ni: 3.5%, Fe: 0.06%, Pb: 0.02%, Ca: 0.13%, As: 0.4%, Sb: 0.024%, Bi: 0.025%, S: 2.8%, Cl: 2.3 % Dry sponge copper is ground to -10 mesh (equivalent to 0.016mm), which accounts for 90%. It is continuously added with a screw feeder at a speed of 230kg / h, and the Cu is pumped in. 2+ :38g / l, containing H 2 SO 4 :130g / l pre-leaching solution, with 0.7m 3 / h speed continuously added to the copper melter. The reaction temperature is controlled at about 83°C. Continuous leaching to contain Cu 2+ :95g / l, H 2 SO 4 :32g / l leaching solution 0.7m 3 / h. After one filter press, add Na to the inlet and outlet liquids 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40~70℃, PH: 1.6. After the second press filter, add water to dilute to contain Cu 2+ :62g / l, containing Ni 2+ :18g / l, after three filter presses, using extractant P 204 Carry out multi-stage countercurrent extraction a...

Embodiment 3

[0036] (Take a single 2t / d copper melter as an example)

[0037] Will contain Cu: 62.3%, Ni: 3.1%, Fe: 0.05%, Pb: 0.03%, Ca: 0.16%, As: 0.56%, Sb: 0.027%, Bi: 0.029%, S: 3.3%, Cl: 2.4 % Dry sponge copper is ground to -10 mesh (equivalent to 0.016mm), which accounts for 90%. Use a screw feeder to continuously add at a speed of 250kg / h, and pump in Cu-containing 2+ :32g / l, containing H 2 SO 4 :140g / l pre-leaching solution, with 0.8m 3 / h speed continuously added to the copper melter. The reaction temperature is controlled at about 78°C. Continuous leaching to contain Cu 2+ :96g / l, H 2 SO 4 :28g / l leaching solution 0.8m 3 / h. After one filter press, add Na to the inlet and outlet liquids 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40~70℃, PH: 1.5. After the second press filter, add water to dilute to contain Cu 2+ :60g / l, containing Ni 2+ :17g / l, after three filter presses, using extractant P 204 Carry out multi-stage countercurrent extraction and d...

technical field

[0001] The invention discloses a method for preparing copper sulfate by using sponge copper and copper-containing waste acid liquid as raw materials, and relates to a method for preparing copper sulfate by using sponge copper and copper-containing waste acid liquid produced by copper-nickel smelting and refining as raw materials. Background technique

[0002] At present, the main production processes for the production of copper sulfate are: 1. Using red copper as raw material, leaching with dilute sulfuric acid after being calcined into copper oxide, and then concentrating and crystallizing the solution to obtain copper sulfate; this method has a complicated process and labor-intensive Large, high energy consumption; 2. The production process of producing copper sulfate from copper sulfide ore, including mineral powder roasting, calcined copper leaching, cooling crystallization and other processes, the total yield of copper sulfate can reach more than 96%; 3...

Examples

Embodiment 1

[0030] (Take a single 2t / d copper melter as an example)

[0031] Will contain Cu: 62.6%, Ni: 3.2%, Fe: 0.05%, Pb: 0.02%, Ca: 0.32%, As: 0.35%, Sb: 0.026%, Bi: 0.019%, S: 2.5%, Cl: 2.2 % Dry sponge copper is ground to -10 mesh (equivalent to 0.016mm), which accounts for 90%. Use a screw feeder to continuously add at a speed of 220kg / h, and pump in Cu-containing 2+ :32g / l, containing H 2 SO 4 :120g / l pre-leaching solution, with 0.65m 3 / h speed continuously added to the copper melter. The reaction temperature is controlled at about 80°C. Continuous leaching to contain Cu 2+ :97g / l, H 2 SO 4 :26g / l leaching solution 0.65m 3 / h. After one filter press, add Na to the inlet and outlet liquids 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40~70℃, PH: 2.0. After the second press filter, add water to dilute to contain Cu 2+ :63g / l, containing Ni 2+ :20g / l, after three filter presses, use extractant P 204 Carry out multi-stage countercurrent extraction and d...

Embodiment 2

[0033] (Take a single 2t / d copper melter as an example)

[0034] Will contain Cu: 60.5%, Ni: 3.5%, Fe: 0.06%, Pb: 0.02%, Ca: 0.13%, As: 0.4%, Sb: 0.024%, Bi: 0.025%, S: 2.8%, Cl: 2.3 % Dry sponge copper is ground to -10 mesh (equivalent to 0.016mm), which accounts for 90%. It is continuously added with a screw feeder at a speed of 230kg / h, and the Cu is pumped in. 2+ :38g / l, containing H 2 SO 4 :130g / l pre-leaching solution, with 0.7m 3 / h speed continuously added to the copper melter. The reaction temperature is controlled at about 83°C. Continuous leaching to contain Cu 2+ :95g / l, H 2 SO 4 :32g / l leaching solution 0.7m 3 / h. After one filter press, add Na to the inlet and outlet liquids 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40~70℃, PH: 1.6. After the second press filter, add water to dilute to contain Cu 2+ :62g / l, containing Ni 2+ :18g / l, after three filter presses, using extractant P 204 Carry out multi-stage countercurrent extraction a...

Embodiment 3

[0036] (Take a single 2t / d copper melter as an example)

[0037] Will contain Cu: 62.3%, Ni: 3.1%, Fe: 0.05%, Pb: 0.03%, Ca: 0.16%, As: 0.56%, Sb: 0.027%, Bi: 0.029%, S: 3.3%, Cl: 2.4 % Dry sponge copper is ground to -10 mesh (equivalent to 0.016mm), which accounts for 90%. Use a screw feeder to continuously add at a speed of 250kg / h, and pump in Cu-containing 2+ :32g / l, containing H 2 SO 4 :140g / l pre-leaching solution, with 0.8m 3 / h speed continuously added to the copper melter. The reaction temperature is controlled at about 78°C. Continuous leaching to contain Cu 2+ :96g / l, H 2 SO 4 :28g / l leaching solution 0.8m 3 / h. After one filter press, add Na to the inlet and outlet liquids 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40~70℃, PH: 1.5. After the second press filter, add water to dilute to contain Cu 2+ :60g / l, containing Ni 2+ :17g / l, after three filter presses, using extractant P 204 Carry out multi-stage countercurrent extraction and d...