USE OF 2-CYANO-N-(SUBSTITUTED CARBAMOYL)ACETAMIDE COMPOUND IN FLOTATION OF CALCIUM-BEARING MINERALS
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United States of America Patent
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Issued Date -
Mar 2, 2023
app pub date -
Jun 22, 2020
filing date -
Dec 23, 2019
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Abstract
A collector 2-cyano-N-(substituted carbamoyl)acetamide compound in flotation of calcium-bearing minerals and a highly selective flotation reagent for the calcium-bearing minerals are provided. The highly selective flotation reagent includes the 2-cyano-N-(substituted carbamoyl)acetamide compound and an auxiliary collector. The 2-cyano-N-(substituted carbamoyl)acetamide compound has an excellent effect on flotation separation of the calcium-bearing minerals and a foaming performance. Dosage is further reduced and a flotation performance is improved by compounding the compound with the auxiliary collector. The flotation reagent can preferably separate fluorite from calcite by flotation, efficiently separates the fluorite and the calcite from scheelite under neutral condition (pH is about 7), effectively purifies rough scheelite concentrate and improves grade of scheelite concentrate. Meanwhile, the neutral flotation reduces influence on the environment.
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