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CN-116899742-B - Bubble control flotation method for micro-fine zinc oxide ore

CN116899742BCN 116899742 BCN116899742 BCN 116899742BCN-116899742-B

Abstract

The invention relates to a bubble control flotation method of micro-fine zinc oxide ore, belonging to the technical field of mineral processing. Aiming at the problems of poor separation index, large foam quantity, poor fluidity, stable foam layer, high viscosity, poor flotation effect and the like of the slime circulation in the flotation process of the micro-fine zinc oxide ore, the invention improves the foam flotation process and recovery index of the micro-fine zinc oxide ore by innovating a flotation flow and developing a novel flotation reagent, namely, adopts the fine scavenging operation to independently treat the mineral products, does not return to the roughing and concentrating operation, avoids the repeated circulation of the slime in the roughing and concentrating operation, directly produces zinc concentrate, and adopts the foam control agent to regulate and control the flotation foam of the micro-fine zinc oxide ore, thereby improving the ore carrying capacity, improving the stability, viscosity and fluidity of the foam layer, being beneficial to smooth operation of the flotation process of the micro-fine zinc oxide ore, obtaining higher flotation index and promoting the efficient recovery of complex and difficult-to-treat zinc ore resources.

Inventors

  • FENG QICHENG
  • ZHAO WENJUAN
  • WEN SHUMING
  • ZHANG QIAN
  • Liao Runpeng
  • MIAO YONGCHAO
  • SHEN ZHIHAO

Assignees

  • 昆明理工大学

Dates

Publication Date
20260505
Application Date
20230808

Claims (6)

  1. 1. A bubble control flotation method for micro-fine zinc oxide ore is characterized by comprising the following specific steps: (1) Crushing and grinding zinc oxide ores to more than 90% of zinc oxide mineral monomers, and adding water to pulp for pulp mixing until the mass percentage concentration of the ore pulp is 25-35%; (2) Sequentially adding sodium sulfide, an inhibitor, a collector and a foam control agent into the ore pulp obtained in the step (1), and performing roughing operation to obtain roughing concentrate and roughing tailings; (3) Sequentially adding an inhibitor, a collector and a foam control agent into the roughing tailings obtained in the step (2), and performing primary scavenging operation to obtain primary scavenging concentrate and primary scavenging tailings; (4) Performing secondary scavenging operation on the primary scavenging tailings obtained in the step (3) to obtain secondary scavenging concentrate and secondary scavenging tailings; (5) Sequentially adding an inhibitor, a collector and a foam control agent into the rough concentrate obtained in the step (2), and carrying out primary concentration operation to obtain primary concentrate and primary tailings; (6) Performing secondary concentration operation on the primary concentrate obtained in the step (5) to obtain zinc concentrate I and secondary concentration tailings; (7) Combining the primary scavenging concentrate obtained in the step (3), the secondary scavenging concentrate obtained in the step (4), the primary concentration tailings obtained in the step (5) and the secondary concentration tailings obtained in the step (6) to form mixed middlings, sequentially adding a collecting agent and a foam control agent into the mixed middlings, and performing fine scavenging operation to obtain zinc concentrate II and fine scavenging tailings, wherein the fine scavenging tailings are returned and combined into the secondary scavenging operation; (8) Combining the zinc concentrate I obtained in the step (6) and the zinc concentrate II obtained in the step (7) to obtain a zinc concentrate product, wherein the secondary scavenging tailings obtained in the step (4) are flotation tailings; The inhibitor is a mixture of sodium carbonate and sodium hexametaphosphate, the collector is a mixture of laurylamine and sodium cocoyl sulfate, and the foam control agent is a mixture of lauryl alcohol, polyether and sorbitan monostearate; The foam-control agent comprises, by mass, 65-75% of sodium carbonate, 25-35% of sodium hexametaphosphate, 55-65% of laurylamine, 35-45% of cocoyl sodium sulfate and 10-20% of lauryl alcohol, wherein the mass percentage of the foam-control agent is 100%, the mass percentage of the polyether is 35-45% and the mass percentage of sorbitan monostearate is 10-20%.
  2. 2. The bubble-controlled flotation method of the micro-fine zinc oxide ore, which is characterized in that the micro-fine zinc oxide ore in the step (1) contains 5.2-9.6% of zinc by mass.
  3. 3. The foam control flotation method of the micro-fine zinc oxide ore is characterized in that 8-14 kg of sodium sulfide, 2000-3000 g of inhibitor, 340-460 g of collector and 160-240 g of foam control agent are added into ore pulp of roughing operation in the step (2) per ton of micro-fine zinc oxide ore.
  4. 4. The foam control flotation method of the micro-fine zinc oxide ore is characterized in that 400-600 g of inhibitor, 80-120 g of collector and 40-60 g of foam control agent are added into the roughing tailing pulp of the primary scavenging operation in the step (3) per ton of micro-fine zinc oxide ore.
  5. 5. The foam control flotation method of the micro-fine zinc oxide ore is characterized in that 300-500 g of inhibitor, 40-60 g of collector and 50-70 g of foam control agent are added into the rough concentrate pulp of one-time concentration operation in the step (5) per ton of micro-fine zinc oxide ore.
  6. 6. The foam control flotation method for the micro-fine zinc oxide ores is characterized in that 70-90 g of collecting agent and 60-80 g of foam control agent are added into mixed middling pulp of the fine scavenging operation in the step (7) according to each ton of the micro-fine zinc oxide ores.

Description

Bubble control flotation method for micro-fine zinc oxide ore Technical Field The invention relates to a bubble control flotation method of micro-fine zinc oxide ore, belonging to the technical field of mineral processing. Background At present, most mine enterprises mainly develop and utilize zinc sulfide ores, but the resource utilization rate of zinc oxide ores is lower, because the zinc oxide ores have complex mineral composition, high content of soluble salts and serious mud degree, and the zinc oxide ores have similar properties with partial gangue minerals, the sorting index of the zinc oxide ores is not ideal, the industrial production process is unstable, a large amount of zinc oxide ores are in a stockpiling state, not only resource waste is caused, but also the surrounding ecological environment is adversely affected. The sulfide-amine flotation method is a main beneficiation method of zinc oxide ore, but the method is seriously affected by mineral mud and soluble salts, and is not suitable for treating ores containing a large amount of mica, sericite, chlorite, carbonaceous shale and the like. Desliming flotation can solve the problems to a certain extent, but a considerable part of zinc oxide minerals exist in the desliming mineral sludge, so that the comprehensive recovery index of the zinc oxide minerals is poor. The adverse effect of the slime on the sulfide-amine flotation method is that the slime with the amine is adhered to mineralized foam, so that the flotation foam is combined with 'armored' by the slime and the amine medicament, so that the flotation foam has long service life and high stability, the circulation quantity of middlings can be increased, the fluidity of ore-carrying foam becomes extremely poor and is difficult to eliminate, the 'run-out' phenomenon is extremely serious, and the flotation process is difficult to control and the production is difficult to carry out. Disclosure of Invention Aiming at the problems of poor ore slime circulation deterioration sorting index, large foam quantity, poor fluidity, stable foam layer, high viscosity, poor flotation effect and the like of micro-particle zinc oxide ore in the flotation process, the invention provides a foam control flotation method of micro-particle zinc oxide ore, which is characterized in that the fine scavenging operation is adopted to treat ore products independently, the ore products are not returned to the roughing and concentrating operation, so that the ore slime is prevented from circulating repeatedly in the roughing and concentrating operation, zinc concentrate is directly produced, and the foam control agent is adopted to regulate and control the flotation foam of the micro-particle zinc oxide ore, thereby improving the ore carrying capacity of the micro-particle zinc oxide ore and improving the stability, viscosity and fluidity of the foam layer. A bubble control flotation method for micro-fine zinc oxide ore comprises the following specific steps: (1) Crushing and grinding zinc oxide ores to more than 90% of zinc oxide mineral monomers, and adding water to pulp for pulp mixing until the mass percentage concentration of the ore pulp is 25-35%; (2) Sequentially adding sodium sulfide, an inhibitor, a collector and a foam control agent into the ore pulp obtained in the step (1), and performing roughing operation to obtain roughing concentrate and roughing tailings; (3) Sequentially adding an inhibitor, a collector and a foam control agent into the roughing tailings obtained in the step (2), and performing primary scavenging operation to obtain primary scavenging concentrate and primary scavenging tailings; (4) Performing secondary scavenging operation on the primary scavenging tailings obtained in the step (3) to obtain secondary scavenging concentrate and secondary scavenging tailings; (5) Sequentially adding an inhibitor, a collector and a foam control agent into the rough concentrate obtained in the step (2), and carrying out primary concentration operation to obtain primary concentrate and primary tailings; (6) Performing secondary concentration operation on the primary concentrate obtained in the step (5) to obtain zinc concentrate I and secondary concentration tailings; (7) Combining the primary scavenging concentrate obtained in the step (3), the secondary scavenging concentrate obtained in the step (4), the primary concentration tailings obtained in the step (5) and the secondary concentration tailings obtained in the step (6) to form mixed middlings, sequentially adding a collecting agent and a foam control agent into the mixed middlings, and performing fine scavenging operation to obtain zinc concentrate II and fine scavenging tailings, wherein the fine scavenging tailings are returned and combined into the secondary scavenging operation; (8) Combining the zinc concentrate I obtained in the step (6) and the zinc concentrate II obtained in the step (7) to obtain a zinc concentrate product, wherein th