Scholarlink

<p>This study investigated the effect of CAMIX02, a soybean oil-based collector with similar lipidic profile and Ca content to CAMIX01 previously studied, on the surface properties of spodumene and the main gangue minerals (feldspar, quartz and muscovite) from a Brazilian Li-pegmatite deposit in Minas Gerais. CAMIX02 has a higher acidity index (186.39 ± 1.06) than CAMIX01 (117.81 ± 0.61). Micro-flotation tests of spodumene using the reagent CAMIX02 (20&#xa0;mg/L) produced higher recoveries than those obtained using CAMIX01 at the same dosage across almost the entire pH range. For the same collector dosage, the highest feldspar recovery (~ 53%) and quartz recovery (~ 75%) were obtained at pH ≤ 6 and pH ≥ 10, respectively. For muscovite, the recovery was ~ 20% across the entire pH range. However, at pH 6 and 10&#xa0;mg/L of CAMIX02, the recoveries for feldspar and quartz were approximately 30% and 44%, respectively. The results of the micro-flotation tests are consistent with a higher concentration of anionic species of saponified carboxylic acids in CAMIX02 than in CAMIX01. From the zeta potential curves, the infrared (IR) spectra of the minerals conditioned with CAMIX02, and the speciation diagrams of oleic acid, pKa of the main saturated and unsaturated carboxylic acids identified in reagent and Ca ions published in the literature, it was inferred that the anionic species of the carboxylic acids were chemically adsorbed onto the aluminium (Al³⁺) sites, as well as onto the calcium (Ca²⁺) and calcium hydroxyl (CaOH⁺) ions. These ions were adsorbed electrostatically onto the spodumene surface. In addition, Ca-OOCR colloid precipitates on mineral surface at higher alkaline pH around 11 to 12. The latter two mechanism predominates for the other silicates studied.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Soybean-oil based collector in the flotation of spodumene from other silicates

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月24日

查看全文
  • Hemerson Olímpio Barcelos,
  • Isabela Pereira Santiago Silva,
  • Margarida Márcia Fernandes Lima,
  • Rosa Malena Fernandes Lima

摘要

This study investigated the effect of CAMIX02, a soybean oil-based collector with similar lipidic profile and Ca content to CAMIX01 previously studied, on the surface properties of spodumene and the main gangue minerals (feldspar, quartz and muscovite) from a Brazilian Li-pegmatite deposit in Minas Gerais. CAMIX02 has a higher acidity index (186.39 ± 1.06) than CAMIX01 (117.81 ± 0.61). Micro-flotation tests of spodumene using the reagent CAMIX02 (20 mg/L) produced higher recoveries than those obtained using CAMIX01 at the same dosage across almost the entire pH range. For the same collector dosage, the highest feldspar recovery (~ 53%) and quartz recovery (~ 75%) were obtained at pH ≤ 6 and pH ≥ 10, respectively. For muscovite, the recovery was ~ 20% across the entire pH range. However, at pH 6 and 10 mg/L of CAMIX02, the recoveries for feldspar and quartz were approximately 30% and 44%, respectively. The results of the micro-flotation tests are consistent with a higher concentration of anionic species of saponified carboxylic acids in CAMIX02 than in CAMIX01. From the zeta potential curves, the infrared (IR) spectra of the minerals conditioned with CAMIX02, and the speciation diagrams of oleic acid, pKa of the main saturated and unsaturated carboxylic acids identified in reagent and Ca ions published in the literature, it was inferred that the anionic species of the carboxylic acids were chemically adsorbed onto the aluminium (Al³⁺) sites, as well as onto the calcium (Ca²⁺) and calcium hydroxyl (CaOH⁺) ions. These ions were adsorbed electrostatically onto the spodumene surface. In addition, Ca-OOCR colloid precipitates on mineral surface at higher alkaline pH around 11 to 12. The latter two mechanism predominates for the other silicates studied.