CN-121988450-A - Mineral separation method for superconducting separation of fine lepidolite

Abstract

The invention provides a mineral separation method for fine lepidolite super-conducting separation, which comprises the steps of grinding lepidolite raw ore, desliming to obtain super-conducting magnetic separation materials and mineral mud, carrying out primary strong magnetic separation by taking steel wool as a magnetic concentration medium to obtain magnetic separation rough concentrate and tailings, adding sodium hexametaphosphate and a collector into the magnetic separation rough concentrate, stirring and rough separation to obtain lepidolite rough concentrate and floatation tailings I, adding a collector into the floatation tailings I, carrying out primary scavenging to obtain floatation tailings and scavenging tailings, returning the scavenging tailings to the previous operation, adding sodium hexametaphosphate into the lepidolite rough concentrate, carrying out primary concentration to obtain lepidolite concentrate and concentrating middlings, and returning the concentrating middlings to the previous operation, wherein the collector is obtained by mixing octadecylamine and 8-phenylamino-1-naphthalene sulfonic acid ammonium salt. The method improves the separation effect of lepidolite, quartz, feldspar and other gangue minerals, solves the problems of low recovery rate and poor selectivity of the traditional flotation process and the traditional collector, and realizes the high-selectivity separation of fine lepidolite.

Inventors

• ZHOU HEPENG
• CAO YIJUN
• MA ZHONGYING
• PAN WENFENG
• XING YAOWEN
• LI SHULEI
• GUI XIAHUI
• ZHANG YONGBING

Assignees

• 江西理工大学

Dates

Publication Date

20260508

Application Date

20260331

Claims (8)

1. 1. The mineral separation method for the superconducting separation of fine lepidolite is characterized by comprising the following steps of: (1) Adding water into the lepidolite ore raw ore to grind the lepidolite ore raw ore to obtain ore pulp; (2) Desliming the ore pulp obtained in the step (1) to obtain superconducting magnetic separation materials and ore sludge; (3) Performing one-stage superconducting magnetic separation on the superconducting magnetic separation material obtained in the step (2) to obtain magnetic separation rough concentrate; (4) Adding sodium hexametaphosphate into the magnetic separation rough concentrate obtained in the step (3) for stirring and dispersing; (5) Adding a collector ZLD-02 into the ore pulp stirred in the step (4), and stirring and pulping; (6) Carrying out lepidolite roughing on the ore pulp stirred in the step (5) to obtain lepidolite rough concentrate and flotation tailings I; (7) Performing primary scavenging on the flotation tailings I obtained in the step (6) to obtain flotation tailings and scavenging tailings, wherein the scavenging tailings return to the roughing operation in the step (6); (8) Carrying out primary concentration on the lepidolite rough concentrate obtained in the step (6) to obtain lepidolite concentrate and concentrated middlings, wherein the concentrated middlings return to the rough concentration operation in the step (6); Wherein the collector ZLD-02 is formed by mixing octadecylamine and 8-phenylamino-1-naphthalene sulfonic acid ammonium salt according to mass ratio.
2. 2. The beneficiation method for superconducting separation of fine lepidolite according to claim 1, wherein in the step (1), the content of ore grinding fineness of-0.074 mm accounts for 70-80%, and the mass concentration of ore pulp obtained after ore grinding is 30-38%.
3. 3. The beneficiation method for superconducting separation of fine lepidolite according to claim 1, wherein in the step (3), the magnetic focusing medium used for superconducting magnetic separation is steel wool, and the background field strength is 5.0T.
4. 4. The beneficiation method for superconducting separation of fine lepidolite according to claim 1, wherein in the step (4), the sodium hexametaphosphate is used in an amount of 400-600 g/t.
5. 5. The beneficiation method for superconducting separation of fine lepidolite according to claim 1, wherein in the step (5), the amount of the collector ZLD-02 is 500-800 g/t, and the stirring time is 3-5 min.
6. 6. The beneficiation method for superconducting separation of fine lepidolite according to claim 1, wherein in the step (7), a collector ZLD-02 is added in the scavenging process, and the dosage is 100-200 g/t.
7. 7. The beneficiation method for superconducting separation of fine lepidolite according to claim 1, wherein sodium hexametaphosphate is added in the beneficiation process in the step (8), and the dosage is 100-200 g/t.
8. 8. The beneficiation method for superconducting separation of fine lepidolite according to claim 1 is characterized in that the preparation method of the collector ZLD-02 comprises the steps of mixing octadecylamine with 8-phenylamino-1-naphthalene sulfonic acid ammonium salt according to a mass ratio of 5:3, and stirring uniformly at normal temperature and normal pressure.

Description

Mineral separation method for superconducting separation of fine lepidolite Technical Field The invention belongs to the technical field of mineral separation, and particularly relates to a mineral separation method for superconducting separation of fine lepidolite particles, wherein the fine lepidolite particles are lepidolite particles with fineness of-0.074 mm and content of more than 70%. Background Lithium is a key basic raw material for new energy industry, and its stable supply is important for industry development. Lepidolite is an important lithium extraction mineral raw material in China, but is often in close symbiosis with gangue minerals such as feldspar, quartz and the like, and has similar surface properties due to similar chemical compositions, so that the flotation separation efficiency in a traditional fatty acid collector system is low. In addition, feldspar minerals are easily subjected to mud formation under the influence of weathering, formed high-surface-energy clay fine mud covers the surfaces of the minerals, the surface property difference among particles is weakened, the separation of lepidolite and gangue minerals is seriously interfered, and the recovery difficulty of fine lepidolite is increased. The breakthrough of the flotation technology is the key for realizing the comprehensive utilization of low-grade lepidolite resources, in particular to the improvement of a flotation collector and a production process flow. The current industry mainly adopts cationic amine collectors under acidic conditions for separation, but has certain collecting capacity, but is extremely sensitive to mineral mud, the matched desliming operation is needed, fine lepidolite loss is caused, the strong acid system has serious corrosion to equipment and pipelines, safety risks exist, and the wastewater treatment cost is high. Meanwhile, the traditional amine collector has poor selectivity in fine lepidolite flotation, is sensitive to mineral mud, and has low recovery rate and limits the sorting efficiency. Therefore, aiming at low-grade fine lepidolite resources, a novel mineral dressing process and a matched reagent system with strong adaptability, good separation effect and high recovery rate are developed, and the mineral dressing process and the matched reagent system become urgent demands of the industry. Through optimizing the sorting flow and the medicament formula, the fine mud cover is effectively restrained, the mineral surface property difference is enhanced, the selective recovery of fine lepidolite is promoted, and the method has important strategic significance in realizing the efficient utilization of low-grade lepidolite resources and supporting the sustainable development of new energy industry chains. Disclosure of Invention The invention aims to provide a mineral separation method for superconductivity separation of fine lepidolite, which has the advantages of good stability, good separation effect, high separation index, high recovery rate and strong adaptability, and aims to solve the problems that the flotation separation of lepidolite and gangue is difficult, the recovery of fine lepidolite is difficult and the like in the existing mineral separation technology of fine lepidolite. In order to achieve the technical purpose, the invention adopts the following technical scheme: a mineral separation method for superconducting separation of fine lepidolite comprises the following steps: (1) Grinding the lepidolite ore raw ore by adding water to obtain ore pulp, wherein grinding equipment can adopt a ball mill or a stirring mill and the like, and the lepidolite ore and gangue ore are fully dissociated by controlling the grinding fineness, so that excessive secondary slime generated by overgrinding is avoided; (2) The ore pulp obtained in the step (1) is subjected to desliming treatment to obtain superconducting magnetic separation materials and ore pulp, desliming equipment can adopt a hydrocyclone or a thickener and the like, desliming operation can effectively eliminate interference of fine mud on a subsequent flotation process, and reduce medicament consumption; (3) Performing one-stage superconducting magnetic separation on the superconducting magnetic separation material obtained in the step (2) to obtain magnetic separation rough concentrate, wherein the working principle of the superconducting magnetic separation is to separate lepidolite from non-magnetic gangue minerals such as quartz and feldspar under the action of a strong magnetic field and a high gradient magnetic concentration medium by utilizing weak magnetism given by trace iron, manganese and other magnetic elements in lepidolite; (4) Adding sodium hexametaphosphate into the magnetic separation rough concentrate obtained in the step (3) for stirring to promote the dispersion of mineral particles in ore pulp, wherein the sodium hexametaphosphate is used as a dispersing agent, so that agglomeration among fine minerals ca