Enhancing flotation separation of fine-grained cassiterite and calcite with cetylpyridine bromide as a dispersant

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2024-07-30 DOI:10.1016/j.apt.2024.104606

Jinwen Li , Jinfang Lv , Lingyu Kong , Longqian Ni , Longwei Qin

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Abstract

Calcite is a common gangue mineral in tin ore, which seriously affects the flotation of fine-grained cassiterite. The enhanced flotation separation of fine-grained cassiterite and calcite with cetylpyridine bromide (CPB) as a dispersant were investigated in the study. The CPB significantly improved the flotation separation efficiency of fine-grained cassiterite and calcite, and it exhibited an excellent dispersion effect and relieved the coating phenomenon of calcite particles on the surface of cassiterite particles. The CPB changed the surface potential of cassiterite from negative value to positive value when the pH was in the range of 3.4–11.5. However, regardless of treatment with CPB, the surface potential of calcite was positive when the pH was below 11.5. The O on the surface of cassiterite reacted with CPB, promoting the chemical adsorption of CPB on the surface of cassiterite. There was weak physical adsorption between CPB and calcite. The covering between cassiterite and calcite without CPB was mainly dependent on van der Waals interaction energy and electrostatic interaction energy. When CPB was in the presence, cassiterite and calcite were repelled by the hydrophobic interaction energy and electrostatic interaction energy.

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用溴化十六烷基吡啶作为分散剂提高细粒锡石和方解石的浮选分离效果

方解石是锡矿中常见的一种夹杂矿物，严重影响细粒锡石的浮选。本研究考察了以溴化十六烷基吡啶（CPB）为分散剂提高细粒锡石和方解石浮选分离效果的情况。CPB明显提高了细粒锡石和方解石的浮选分离效率，并表现出良好的分散效果，缓解了方解石颗粒在锡石颗粒表面的包覆现象。当 pH 值在 3.4-11.5 范围内时，CPB 使锡石的表面电位由负值变为正值。然而，无论使用何种氯化石蜡处理，当 pH 值低于 11.5 时，方解石的表面电位均为正值。方解石表面的 O 与氯化石蜡发生反应，促进了氯化石蜡在方解石表面的化学吸附。CPB 与方解石之间的物理吸附作用很弱。在没有 CPB 的情况下，锡石和方解石之间的覆盖主要取决于范德华相互作用能和静电相互作用能。有氯化石蜡存在时，锡石和方解石在疏水作用能和静电作用能的作用下被排斥。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)