CN-121649048-B - Method for floatation of copper oxide or copper-cobalt oxide ore by utilizing backwater of calcium-magnesium-rich high-alkalinity tailings

Abstract

The invention discloses a method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-magnesium-rich high-alkalinity tailings, and belongs to the technical field of ore dressing. Crushing, grinding and pulping raw copper oxide or copper-cobalt oxide ore to obtain ore pulp, adding copper-cobalt ore inhibitor (ammonium dithiocarbamate and amino sulfonate) and calcium-magnesium gangue mineral collector into the ore pulp for reverse flotation, wherein the foam product is calcium-magnesium gangue mineral, the tailing product is copper oxide or copper-cobalt oxide concentrate, and water used in the grinding, pulping and reverse flotation processes is calcium-magnesium rich high-alkalinity tailing backwater. The method not only improves the flotation recovery rate of the copper oxide or copper cobalt oxide ore, but also realizes the direct and efficient utilization of the backwater of the calcium-magnesium-rich high-alkaline tailings, and has good industrial application value and environmental friendliness.

Inventors

• YUE TONG
• Fu Xinzhuang
• SUN WEI

Assignees

• 中南大学

Dates

Publication Date

20260512

Application Date

20260206

Claims (9)

1. 1. A method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-rich magnesium high-alkaline tailings is characterized by comprising the following steps: 1) Crushing copper oxide or copper oxide cobalt ore raw ore, grinding and pulping to obtain ore pulp; 2) Adding a copper-cobalt ore inhibitor and a calcium-magnesium gangue mineral collector into the ore pulp for reverse flotation, wherein the foam product is calcium-magnesium gangue mineral, and the tailing product is copper oxide or copper-cobalt oxide concentrate; Wherein, the Water used in the processes of ore grinding, pulp mixing and reverse flotation is returned water of calcium-rich magnesium high-alkaline tailings; The coobolite inhibitor comprises ammonium dithiocarbamate and sulfamate; The amino-containing sulfonate has the following molecular structure: ; Wherein, the R is C 1 ~C 3 alkyl chain or benzene ring; M represents a monovalent cation.
2. 2. The method for flotation of copper oxide or copper cobalt oxide ore by utilizing calcium-magnesium-rich high-alkaline tailing backwater is characterized in that the concentration of calcium ions and magnesium ions in the calcium-magnesium-rich high-alkaline tailing backwater is 200-3000 mg/L, and the pH value is 8.0-12.5.
3. 3. The method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-rich magnesium overbased tailings, which is characterized in that the copper cobalt ore inhibitor consists of 60-70% by mass of ammonium dithiocarbamate and 30-40% by mass of sulfamate.
4. 4. The method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-rich magnesium high alkaline tailings according to claim 1, wherein the calcium-magnesium gangue mineral collector comprises at least one of sodium oleate, sodium stearate, metal-fatty acid, benzoic hydroxamic acid and salicylic hydroxamic acid.
5. 5. The method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-magnesium-rich high alkaline tailings according to claim 1,2 or 4, wherein the reverse flotation comprises a roughing process and a scavenging process.
6. 6. The method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-rich magnesium high alkaline tailings according to claim 5, wherein the method comprises the following steps: the roughing medicament system comprises 400-1000 g/t of copper cobalt ore inhibitor and 600-1200 g/t of calcium magnesium gangue mineral collector; The scavenging medicament system comprises 200-500 g/t of copper cobalt ore inhibitor and 300-600 g/t of calcium magnesium gangue mineral collector.
7. 7. The method for flotation of copper oxide or copper-cobalt oxide ore by utilizing backwater of calcium-rich magnesium high-alkaline tailings, which is disclosed in claim 1, is characterized in that the copper grade in raw copper oxide or copper-cobalt oxide ore is 0.5% -3.0%, and the calcium and magnesium grades are both more than 5%.
8. 8. The method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-rich magnesium high-alkaline tailings, which is characterized in that the mass ratio of the ore grinding to the particle size grade meeting fineness of-0.074 mm is 60% -80%.
9. 9. The method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-rich magnesium high-alkaline tailings, which is characterized in that the pulp is mixed to meet the condition that the pulp concentration is 20-45wt%.

Description

Method for floatation of copper oxide or copper-cobalt oxide ore by utilizing backwater of calcium-magnesium-rich high-alkalinity tailings Technical Field The invention relates to a beneficiation method, in particular to a method for flotation of copper oxide or copper cobalt oxide ore by utilizing backwater of calcium-magnesium-rich high-alkalinity tailings, and belongs to the technical field of beneficiation. Background Copper and cobalt are both important metallic elements and are widely used in electronics and construction and in new technological developments. With the increasing reduction of copper-cobalt sulfide ore resources which are easy to select, low-grade difficult-to-select copper-cobalt oxide ore becomes an important metal resource. The low-grade copper-cobalt oxide ore has complex composition, fine embedding granularity and high oxidation rate, and is closely symbiotic with calcium-magnesium carbonate minerals such as calcite, dolomite and the like. On the other hand, the existing 'sulfuration-xanthate' or direct fatty acid flotation process has low copper-cobalt recovery rate, low separation efficiency and high leaching acid consumption, so that the effective development and utilization of the ore resources become more difficult. In the existing industrial production, a closed-loop water circulation system of flotation, concentrate smelting, tailing concentration, tailing backwater and smelting backwater recycling is commonly adopted in a concentrating mill. On one hand, because the calcium-magnesium carbonate mineral in the ore is continuously dissolved in the processes of ore grinding, pulp mixing, flotation and the like, and on the other hand, a large amount of calcium oxide and magnesium oxide are added in the smelting process to regulate the pH value of the solution, the tailings and the smelting backwater are usually rich in a large amount of calcium-magnesium and other metal ions. However, in the prior art, aiming at the high alkaline backwater rich in calcium and magnesium, measures are generally taken, namely firstly direct recycling can deteriorate flotation effect and index, secondly measures such as partially discharging backwater or supplementing new water can bring serious problems such as environmental pollution and water expansion, and thirdly measures such as adding chelating agent, softening agent pretreatment or quality-classifying utilization can lead to problems such as complex flow and high running cost. Therefore, how to realize stable and efficient flotation of copper oxide or copper cobalt oxide under the backwater condition of the calcium-magnesium-rich high-alkaline tailings becomes a key technical problem to be solved in the current beneficiation field, and has important significance for efficient utilization of copper and cobalt resources, water conservation, emission reduction and green low-carbon development. Disclosure of Invention In order to solve the problems that the recovery rate of copper oxide or copper-cobalt oxide ore flotation is low, the backwater of calcium-magnesium-rich high-alkaline tailings is difficult to effectively utilize and the like in the prior art, the invention aims to provide the beneficiation method capable of realizing the efficient flotation of copper oxide or copper-cobalt oxide ore under the backwater condition of calcium-magnesium-rich high-alkaline tailings. In order to achieve the technical aim, the invention provides a method for flotation of copper oxide or copper-cobalt oxide ore by utilizing backwater of calcium-magnesium-rich high-alkalinity tailings, which comprises the following steps: 1) Crushing copper oxide or copper oxide cobalt ore raw ore, grinding and pulping to obtain ore pulp; 2) Adding a copper-cobalt ore inhibitor and a calcium-magnesium gangue mineral collector into the ore pulp for reverse flotation, wherein the foam product is calcium-magnesium gangue mineral, and the tailing product is copper oxide or copper-cobalt oxide concentrate; Wherein, the Water used in the processes of ore grinding, pulp mixing and reverse flotation is returned water of calcium-rich magnesium high-alkaline tailings; the coobolite inhibitor comprises ammonium dithiocarbamate and an sulfamate. The key point of the invention is that special ammonium dithiocarbamate and sulfamate are adopted as copper-cobalt ore inhibitors, the copper-cobalt ore inhibitors have stronger selective inhibition effect on useful minerals such as malachite, blue copper ore, water-cobalt ore and the like in copper oxide or copper-cobalt oxide ore, and on the basis, calcium-magnesium gangue mineral collectors are matched and used, and calcium ions and magnesium ions in the return water of the calcium-magnesium-rich high-alkaline tailings are utilized to strengthen the absorption of the calcium-magnesium gangue mineral collectors on the surface of the calcium-magnesium gangue mineral, so that the floatable difference between the copper oxide or copper-cobalt