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CN-122012940-A - Space-time sectional synergistic leaching process for treating copper oxide and copper sulfide symbiotic copper ore

CN122012940ACN 122012940 ACN122012940 ACN 122012940ACN-122012940-A

Abstract

The invention discloses a space-time sectional collaborative leaching process for treating copper oxide and copper sulfide symbiotic copper ore, which comprises the following steps of S1, a pretreatment stage, S3, solid-liquid separation and product recovery, wherein the solid-liquid separation is carried out on the product obtained by the collaborative optimization stage to obtain leaching residues and leaching liquid, the solvent extraction-electrowinning process is adopted on the leaching liquid to finally obtain copper products. The invention realizes the efficient collaborative leaching of copper oxide and copper sulfide symbiotic copper ore in a single reactor, and overcomes the technical defects of complex process flow, high investment cost and low operation efficiency of the traditional process.

Inventors

  • YUAN RONG
  • XUN KAIBING
  • ZHOU XIONG
  • YU XIA
  • MA WEIHUA
  • YAN LEI

Assignees

  • 云南金浔资源股份有限公司
  • 安徽金浔新能源材料有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (8)

  1. 1. The space-time sectional synergistic leaching process for treating copper oxide and copper sulfide symbiotic copper ore is characterized by comprising the following steps of, S1, a pretreatment stage: S11, receiving and primarily screening raw materials, conveying copper oxide and copper sulfide symbiotic copper ore raw materials into a pretreatment workshop through a conveyor belt, primarily screening by using a vibrating screen, removing blocky materials with the particle size of more than 50mm, and enabling qualified materials with the particle size of not more than 50mm to enter into the next treatment; S12, crushing and granularity control, namely feeding the qualified materials in the step S11 into a jaw crusher for coarse crushing, feeding the materials with the particle size of 25-50mm after coarse crushing into a cone crusher for medium crushing, feeding the materials with the particle size of 10-25mm after medium crushing into a ball mill for fine crushing, and finally obtaining CuO-CuS mineral powder with the particle size of not more than 2 mm; S13, washing and desliming, namely conveying the CuO-CuS mineral powder into a washing tank, adding clear water for washing operation, removing soil and soluble impurities attached to the surface in the washing process to form washed CuO-CuS mineral powder, carrying out solid-liquid separation by using a spiral classifier, and recovering washing water, wherein the solid content of the washed CuO-CuS mineral powder is controlled to be 60-65%; s14, uniformly mixing and homogenizing, namely mixing a plurality of batches of washed CuO-CuS mineral powder in proportion to ensure component uniformity, fully uniformly mixing by using a stirrer to form homogenized CuO-CuS mineral powder with uniform components, sampling and detecting to ensure the content of CuO to be 20-30%, the content of CuS to be 15-25% and the content of other minerals to be 50-65%; s15, batching and storing, wherein limestone powder is added into the homogenized CuO-CuS mineral powder as a regulator according to the requirement of a subsequent leaching process, and the regulated CuO-CuS mineral powder is stored in a bin; S2, the CuO-CuS mineral powder regulated in the step S1 enters a leaching reactor, and the leaching process is divided into a time sequence-copper oxide section, a time sequence-copper sulfide section and a time sequence-cooperative optimization section, wherein: s21, time sequence-copper oxide segment: Adding the regulated CuO-CuS mineral powder into a reactor, regulating the pH value to 1.0-2.0, controlling the temperature to 70-85 ℃, controlling the stirring speed to 100-200rpm, controlling the oxidation-reduction potential ORP to be in the range of 200-400mV for 4-6 hours, and enabling copper oxide to react with acid preferentially to generate Cu < 2+ >, so that the exposed copper oxide or part of copper oxide is leached out, and forming a copper oxide section end product; S22, time sequence-copper sulfide segment: Adding a composite oxidant consisting of FeCl 3 and H 2 O 2 into the copper oxide section end product, regulating the pH to 1.5-2.5, controlling the temperature to 75-85 ℃, stirring the copper oxide section end product at 150-250rpm, and controlling the oxidation-reduction potential ORP within the range of 400-600mV for 6-8 hours; wherein the concentration of FeCl 3 in the composite oxidant is controlled to be 0.1-0.3mol/L, and the concentration of H 2 O 2 is controlled to be 0.05-0.15mol/L; S23, a time sequence-cooperative optimization section: Adding a composite oxidant consisting of FeCl 3 and H 2 O 2 into the copper sulfide segment end product, starting ultrasonic or microwave treatment, adopting ultrasonic or microwave to remove the crushed inclusion, adjusting the pH to 1.8-2.2, controlling the temperature to 75-80 ℃, controlling the stirring speed to 200-300rpm, controlling the treatment time to 4-6 hours, controlling the oxidation-reduction potential ORP to be in the range of 500-600mV, and forming the synergistic optimization segment end product; S3, solid-liquid separation and product recovery: and (3) carrying out solid-liquid separation on the product after the synergistic optimization section to obtain leaching residues and leaching liquid, and adopting a solvent extraction-electrowinning process to obtain the leaching liquid to finally obtain the copper product.
  2. 2. The space-time staged co-leaching process for treating copper oxide and copper sulfide co-occurrence copper ore according to claim 1, wherein the time of the time series-copper oxide stage in step S21 is controlled to 5 hours, the pH is controlled to 1.5, the temperature is controlled to 75 ℃, and the stirring speed is controlled to 150rpm.
  3. 3. The space-time staged collaborative leaching process for treating copper oxide and copper sulfide co-occurrence copper ore according to claim 1, wherein the time sequence-copper oxide stage in step S21 is controlled to have a solid-to-liquid ratio of 1:4-1:6.
  4. 4. The space-time staged co-leaching process for treating copper oxide and copper sulfide co-occurrence copper ore according to claim 1, wherein the time of the time series-copper sulfide stage in step S22 is controlled to 7 hours, the pH is controlled to 2.0, the temperature is controlled to 80 ℃, and the stirring speed is controlled to 200rpm.
  5. 5. The space-time staged co-leaching process for treating copper oxide and copper sulfide co-occurrence copper ore according to claim 1, wherein the time of the time series-co-optimization stage in step S23 is controlled to 5 hours, the pH is controlled to 2.0, the temperature is controlled to 78 ℃, and the stirring speed is controlled to 250rpm.
  6. 6. The space-time sectional collaborative leaching process for treating copper oxide and copper sulfide intergrowth copper ore according to claim 1, wherein in step S23, the ultrasonic power density is controlled to be 2-5W/L, and the microwave power density is controlled to be 3-8W/L.
  7. 7. The space-time staged collaborative leaching process for treating copper oxide and copper sulfide intergrowth copper ore according to claim 1, wherein in step S23, the concentration of dissolved oxygen is controlled to be equal to or higher than 8mg/L.
  8. 8. The space-time staged collaborative leaching process for treating copper oxide and copper sulfide intergrowth copper ore according to claim 1, wherein in step S3, a filter press or a centrifuge is used for solid-liquid separation, and the separation temperature is controlled to be 40-60 ℃.

Description

Space-time sectional synergistic leaching process for treating copper oxide and copper sulfide symbiotic copper ore Technical Field The invention relates to the technical field of hydrometallurgy, in particular to a space-time sectional synergistic leaching process for treating copper oxide and copper sulfide symbiotic copper ore. Background Under the current state of the traditional hydrometallurgical process, the copper hydrometallurgical leaching technology faces a core technical challenge in treating mixed copper ores (copper oxide and copper sulfide intergrowth). The traditional process route mainly comprises a traditional two-stage method, a heap leaching method, a dressing and smelting combined method and the like, and the methods have the structural problems of complex flow, high investment cost, low operation efficiency and the like when processing complex mixed ores. The traditional two-stage process is a main stream process for treating copper oxide and copper sulfide in stages: A first stage of treating copper oxide at a lower acidity (pH 2.0-2.2) and a temperature (40-50 ℃); second stage, raising acidity (pH 1.6-1.8) and temperature (60-90 ℃) and adding oxidant to treat copper sulfide technical defect: The traditional two-stage method has the disadvantages of complex process, need of two sets of independent equipment and control systems, frequent solid-liquid separation, increased operation procedures and equipment investment, high energy consumption, large occupied area, multiple reactors and separation equipment, frequent manual operation and increased labor cost, and is suitable for the two-stage heating and multi-equipment operation; The new-stage heap leaching method has the technical defects that the heterogeneity of the ore heap is serious, the uniform leaching is difficult to realize, the on-line monitoring is difficult, the accurate control is difficult, the leaching period is long, usually, several months to several years are required, the impurity control effect is limited, and impurities are easy to enrich; the combined flotation and leaching technology has the technical defects of longest flow, most equipment, high cost of flotation reagent and high reagent residue affecting the subsequent leaching The overall economy is poor; The technical barrier in the prior art also has the problem of a passivation film of copper sulfide, the traditional method generally faces the problem of the passivation film of S 0 when the copper sulfide is treated, the film is characterized in that the thickness is 0.1-10 mu m, the resistivity is 101- 0 -1012 omega cm, the copper sulfide is incompletely oxidized to form a hydrophobic compact elemental sulfur film, the leaching rate is obviously reduced, the recovery rate is reduced, and the traditional solution is easy to cause excessive oxidation and side reaction by increasing the consumption of an oxidant. Disclosure of Invention The invention aims to provide a space-time sectional collaborative leaching process for treating copper oxide and copper sulfide symbiotic copper ore, which aims to realize efficient collaborative leaching of copper oxide and copper sulfide symbiotic copper ore in a single reactor and overcome the technical defects of complex process flow, high investment cost and low operation efficiency of the traditional multi-stage method. In order to achieve the above purpose, the present invention provides the following technical solutions: the space-time sectional synergistic leaching process for treating copper oxide and copper sulfide symbiotic copper ore comprises the following steps, S1, a pretreatment stage: S11, receiving and primarily screening raw materials, conveying copper oxide and copper sulfide symbiotic copper ore raw materials into a pretreatment workshop through a conveyor belt, primarily screening by using a vibrating screen, removing blocky materials with the particle size of more than 50mm, and enabling qualified materials with the particle size of not more than 50mm to enter into the next treatment; S12, crushing and granularity control, namely feeding the qualified materials in the step S11 into a jaw crusher for coarse crushing, feeding the materials with the particle size of 25-50mm after coarse crushing into a cone crusher for medium crushing, feeding the materials with the particle size of 10-25mm after medium crushing into a ball mill for fine crushing, and finally obtaining CuO-CuS mineral powder with the particle size of not more than 2 mm; S13, washing and desliming, namely conveying the CuO-CuS mineral powder into a washing tank, adding clear water for washing operation, removing soil and soluble impurities attached to the surface in the washing process to form washed CuO-CuS mineral powder, carrying out solid-liquid separation by using a spiral classifier, and recovering washing water, wherein the solid content of the washed CuO-CuS mineral powder is controlled to be 60-65%; s14, uniformly mixing and homog