Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors
The floatability of hematite and quartz were investigated using dodecylamine as collector and cassava starch, carboxymethyl starches with degree of substitution (DS) of 0.026 and 0.21, and phosphate ester starches with DS of 0.0065 and 0.055 as depressants. The effect of DS on the depressing behavio...
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Science Press
2017-12-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2017.12.006 |
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| author | REN Ai-jun SUN Chuan-yao ZHU Yang-ge |
| author_facet | REN Ai-jun SUN Chuan-yao ZHU Yang-ge |
| author_sort | REN Ai-jun |
| collection | DOAJ |
| description | The floatability of hematite and quartz were investigated using dodecylamine as collector and cassava starch, carboxymethyl starches with degree of substitution (DS) of 0.026 and 0.21, and phosphate ester starches with DS of 0.0065 and 0.055 as depressants. The effect of DS on the depressing behavior of modified starches was studied. The flotation results show that native starch, carboxymethyl starch with DS of 0.026, and phosphate ester starch with DS of 0.0065 can strongly depress hematite, whereas carboxymethyl starch with DS of 0.21 and phosphate ester starch with DS of 0.055 weakly depress it. The native starch and carboxymethyl starch with DS of 0.026 can strongly depress quartz, whereas the other three starches are investigated possessed less depressing capabilities for quartz. The results reveal that a low-DS phosphate ester starch is a highly selective depressant in the reverse flotation of silica-containing iron ore with cationic collectors. The Zeta potential measurements exhibit that modified starches with higher DS can lead to lower Zeta potentials of minerals. Thus, the weakened depressing capabilities of modified starches might adsorb cationic collectors on the mineral surface via electrostatic attraction with negatively charged groups stretching into the solution. |
| format | Article |
| id | doaj-art-8ab2c3cb62cb4223b7679da11ca22429 |
| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2017-12-01 |
| publisher | Science Press |
| record_format | Article |
| series | 工程科学学报 |
| spelling | doaj-art-8ab2c3cb62cb4223b7679da11ca224292025-08-20T01:47:55ZzhoScience Press工程科学学报2095-93892017-12-0139121815182110.13374/j.issn2095-9389.2017.12.006Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectorsREN Ai-junSUN Chuan-yao0ZHU Yang-ge12) State Key Laboratory of Mineral Processing, Beijing General Research Institute of Mining & Metallurgy, Beijing 102628, China2) State Key Laboratory of Mineral Processing, Beijing General Research Institute of Mining & Metallurgy, Beijing 102628, ChinaThe floatability of hematite and quartz were investigated using dodecylamine as collector and cassava starch, carboxymethyl starches with degree of substitution (DS) of 0.026 and 0.21, and phosphate ester starches with DS of 0.0065 and 0.055 as depressants. The effect of DS on the depressing behavior of modified starches was studied. The flotation results show that native starch, carboxymethyl starch with DS of 0.026, and phosphate ester starch with DS of 0.0065 can strongly depress hematite, whereas carboxymethyl starch with DS of 0.21 and phosphate ester starch with DS of 0.055 weakly depress it. The native starch and carboxymethyl starch with DS of 0.026 can strongly depress quartz, whereas the other three starches are investigated possessed less depressing capabilities for quartz. The results reveal that a low-DS phosphate ester starch is a highly selective depressant in the reverse flotation of silica-containing iron ore with cationic collectors. The Zeta potential measurements exhibit that modified starches with higher DS can lead to lower Zeta potentials of minerals. Thus, the weakened depressing capabilities of modified starches might adsorb cationic collectors on the mineral surface via electrostatic attraction with negatively charged groups stretching into the solution.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2017.12.006carboxymethyl starchphosphate ester starchdegree of substitution (ds)hematitereverse flotation with cationic collectors |
| spellingShingle | REN Ai-jun SUN Chuan-yao ZHU Yang-ge Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors 工程科学学报 carboxymethyl starch phosphate ester starch degree of substitution (ds) hematite reverse flotation with cationic collectors |
| title | Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors |
| title_full | Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors |
| title_fullStr | Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors |
| title_full_unstemmed | Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors |
| title_short | Depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors |
| title_sort | depressing capability of modified starches in the reverse flotation of quartz from hematite with cationic collectors |
| topic | carboxymethyl starch phosphate ester starch degree of substitution (ds) hematite reverse flotation with cationic collectors |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2017.12.006 |
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