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Transactions of Nonferrous Metals Society of China 2022年

作者： ángel Daniel GUERRERO-FLORES Martha Araceli Elizondo-álvarez José Manuel FLORES-áLVAREZ alejandro uribe-salas Department of Metallurgical Engineering， CINVESTAV-IPN， Unidad Saltillo Department of Materials， Unidad Académica de Ingeniería I， Universidad Autónoma de Zacatecas "Francisco García Salinas"，Zacatecas Facultad de Ciencias Químicas， Universidad de Colima

Due to environmental policies and economic reasons， the water used in some flotation operations of complex sulfide ores is recirculated causing the ion concentration of some species to increase over time， affecting the flotation of the minerals of interest. In the above context， this work presents an experimental and thermodynamic analysis of the treatment of synthetic solutions with a high content of calcium and sulfate ions. The study focused on evaluating the use of two aluminum compounds for the precipitation of Ca;and SO;in the form of ettringite. The amorphous aluminum hydroxide was found to be more efficient than the crystalline one， giving rise to 83% calcium and 91% sulfate removals. The XRD analysis of the solids obtained showed to be ettringite the main reaction product， accompanied by small amounts of calcite， due to the absorption of atmospheric carbon dioxide. The final solution after the chemical treatment showed residual calcium and sulfate concentrations below 200 mg/L. Finally， the kinetics of calcium removal appeared to correspond to a second order reaction with respect to calcium concentration， with an apparent activation energy of 53.5 kJ/mol， which may suggest that the ettringite precipitation process is governed by the chemical reaction.

关键词：

用氢氧化铝处理浮选循环水同时脱除钙离子和硫酸根离子

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Transactions of Nonferrous Metals Society of China 2022年第7期32卷 2379-2390页

作者： Ángel Daniel GUERRERO-FLORES Martha Araceli ELIZONDO-ÁLVAREZ JoséManuel FLORES-ÁLVAREZ alejandro uribe-salas Department of Metallurgical Engineering CINVESTAV-IPNUnidad Saltillo25900Ramos ArizpeCoahuilaMéxico Department of Materials Unidad Académica de Ingeniería IUniversidad Autónoma de Zacatecas“Francisco García Salinas”ZacatecasZacatecasMéxico Facultad de Ciencias Químicas Universidad de ColimaCoquimatlánColimaMéxico

由于环境政策和经济因素,复杂硫化物矿的一些浮选作业用水循环使用,导致某些离子的浓度逐渐升高,影响到相关矿物的浮选。在此背景下,对含有高浓度钙和硫酸盐离子的合成溶液的处理进行实验研究和热力学分析。重点评估两种铝化合物对于Ca^... 详细信息

由于环境政策和经济因素,复杂硫化物矿的一些浮选作业用水循环使用,导致某些离子的浓度逐渐升高,影响到相关矿物的浮选。在此背景下,对含有高浓度钙和硫酸盐离子的合成溶液的处理进行实验研究和热力学分析。重点评估两种铝化合物对于Ca^(2+)和SO_(4)^(2-)以钙矾石形式析出过程的作用。结果发现,非晶态氢氧化铝比晶态氢氧化铝更为有效,可脱除高达83%的钙和91%的硫酸盐。对所得固体样品的XRD分析表明,因为吸收了大气中的二氧化碳,主要反应产物为钙矾石,伴随着少量的方解石。化学处理后的最终溶液中残留钙和硫酸盐的浓度低于200 mg/L。动力学研究发现,钙脱除过程对于钙浓度为二级反应,表观活化能为53.48 kJ/mol,表明钙矾石析出过程可能受化学反应控制。

关键词：钙矾石离子去除氢氧化铝钙硫酸盐

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Thermodynamic and experimental studies on the removal of calcium and sulfate ions from recycling waters of complex-sulfide flotation operations

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Transactions of Nonferrous Metals Society of China 2021年

作者： Elvis Bustos-Flores Martha Araceli Elizondo-álvarez alejandro uribe-salas Department of Metallurgical Engineering， CINVESTAV-IPN， Unidad Saltillo

In this investigation， a chemical method for removing calcium sulfate of saturated solutions (0.016 mol/L CaSO;) using barium chloride (BaCl;·2H;O) and sodium phosphate (Na;PO;) is experimentally studied. The main interest is to remove these ions from the solution through the precipitation of two solid species: sulfate (SO;) as barite (BaSO;)， and calcium (Ca;) as hydroxyapatite (Ca;(PO;);OH). Additionally， a solid/liquid separation method （i.e.， flotation） is explored， using oleic acid and dodecylamine as collectors. The results obtained show that the chemical treatment of saturated solutions at 60 ℃， pH 11.5 and treated with 3.9 g/L of BaCl;and 1.6 g/L of Na;PO;， promotes the precipitation of barium sulfate and calcium-deficient hydroxyapatite (Ca;(HPO;);(PO;);（OH）;)， with residual concentrations below 0.10 and 5 mg/L of calcium and sulfate， respectively. The residual calcium concentration increases to 28 mg/L when using the same amount of reactants， at temperature and pH values below those quoted. The highest flotation recovery of hydroxyapatite with oleic acid at pH 9.5 was about 80%， while that of barite floated with dodecylamine at pH 6.5 was about 90%.

关键词： Calcium Sulfate Dodecylamine Oleic acid Barite Hydroxyapatite

复合硫化物浮选作业循环水中钙和硫酸根离子去除的热力学及实验研究

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Transactions of Nonferrous Metals Society of China 2021年第10期31卷 3116-3127页

作者： Elvis BUSTOS-FLORES Martha Araceli ELIZONDO-ÁLVAREZ alejandro uribe-salas Department of Metallurgical Engineering CINVESTAV-IPNUnidad Saltillo25900Ramos ArizpeCoahuilaMexico

研究一种用氯化钡(BaCl_(2)∙2H_(2)O)和磷酸钠(Na_(3)PO_(4))去除饱和溶液中(0.016 mol/L CaSO_(4))硫酸钙的化学方法。主要目的是通过沉淀出两种固体物质从溶液中去除这些离子:硫酸根(SO_(4)^(2−))沉淀为重晶石(BaSO_(4)),钙(Ca^(2+))沉淀为羟基磷灰石(Ca_(5)(PO_(4))_(3)OH)。此外,探索一种用油酸和十二烷基胺作捕集剂的固体/液体分离方法(即浮选)。结果表明,在60℃、pH 11.5下用3.9 g/L BaCl_(2)·2H_(2)O和1.6 g/L Na_(3)PO_(4)对饱和溶液进行化学处理,促进硫酸钡和缺钙羟基磷灰石(Ca_(10−x)(HPO_(4))_(x)(PO_(4))_(6−x)(OH)_(2−x))的沉淀,钙和硫酸根的残余浓度分别低于0.10和5 mg/L。当反应剂用量相同、在低于上述温度和pH值下处理时,残余钙浓度增加到28 mg/L。用油酸作捕集剂、pH 9.5时羟基磷灰石的浮选回收率最高,约为80%;而用十二烷基胺作捕集剂、pH 6.5时重晶石的浮选回收率约为90%。

关键词：钙硫酸盐十二烷基胺油酸重晶石羟基磷灰石浮选分离

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Effect of Temperature and the Organic Phase Content on the Stripping of Mn(II) from a D2EPHA-KEROSENE Pseudo-Emulsion Using a Sulfuric Acid Aqueous Solution

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Engineering（科研） 2012年第11期4卷 723-727页

作者： Jaime Cristobal Rojas-Montes Roberto Pérez-Garibay alejandro uribe-salas Fabiola Nava-Alonso Centro de Investigación y de Estudios Avanzados del IPN Unidad Saltillo Ramos Arizpe México

There are few studies oriented to analyze the interaction between the variables of the stripping process of actual leaching solutions. The aim of this work was to study the effect of temperature and the percent of organic phase in the stripping pseudo-emulsion (D2EPHA and kerosene) on the manganese stripping process. Other studied variables were the acid concentration (H2SO4) in the aqueous phase, the percent of the organic phase in the pseudo-emulsion and the number of stripping stages. This information may be of interest to countries with radical temperature variations. It was discovered that in the range of 10?C to 50?C, temperature improves the depletion of manganese from the D2EPHA. Additionally, the percent of the organic phase should be less than 90% by volume of the pseudo-emulsion to favour the manganese exchange. Moreover, the H2SO4 concentration in the aqueous phase should be less than 1 M to avoid chemical instability of the organic phase.

关键词： Manganese Solvent Extraction Manganese Stripping Manganese Pyrolusite

Comparative Study between D2EHPA and Cyanex 272 as Extractants of Mn(II) from a Leached Liquor Produced by Reductive Leaching of a Pyrolusite Ore with SO<sub>2</sub>

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Engineering（科研） 2012年第9期4卷 526-531页

作者： R. Pérez-Garibay J. Martínez-Jiménez A. uribe-salas A. Martínez-Luévanos Centro de Investigación y de Estudios Avanzados del IPN Carretera Saltillo-Monterrey km 13.5 Ramos Arizpe Coah. México

This paper compares the efficiency of D2EHPA and Cyanex 272 to extract the divalent manganese cation from an actual leaching solution obtained by reductive leaching of a low-grade pyrolusite ore, using SO2 gas. The studied variables were the extractant concentration in the organic phase, the pH of the leached liquor and the volume ratio between organic phase and leached liquor. It was observed that D2EHPA is a better extractant than Cyanex272. Therefore, with the best experimental conditions found, both extractants reach a manganese recovery around 95% with five extraction stages conducted under the following conditions: 25?C, O/A = 2, 10% volume of extractant concentration in the organic phase, pH of the leached liquor before the mixing between 8 and 8.5, and one minute of mixing time for each extraction stage.

关键词： Manganese Solvent Extraction Manganese Leaching Manganese Pyrolusite