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Effect of the Addition of Flocculants and KCl on Sedimentation Rate of Spodumene Tailings
Metals ( IF 2.9 ) Pub Date : 2021-06-21 , DOI: 10.3390/met11060986
Kevin Pérez , Carlos Moraga , Nelson Herrera , Eleazar Salinas-Rodríguez , Edelmira Gálvez

Lithium has become an element of great relevance in recent times, because among its various applications is the manufacture of batteries, and it is a vital part of the growing development of new products such as electric vehicles. On the other hand, the geographical distribution of lithium reserves is very heterogeneous. Of the existing minerals, only some of them are important sources of exploitation, such as the salt in South America, while in other countries mineral deposits such as spodumene stand out. The process for obtaining lithium from spodumene consists of concentrating up to 3% lithium by flotation. Because other minerals associated with this mineral are mainly silicates (feldspar, clays, quartz and micas), great problems are generated in the thickening stage. This article seeks to study the effect of the addition of flocculants and KCl on the sedimentation rate, in addition to studying its effects on the turbidity of the supernatant in different types of water. This is done by Batch sedimentation tests with tailings pulps, to later characterize both the pulp and the supernatant by means of the turbidity of the clarified water. Magnafloc-338 flocculant is the most convenient to use with industrial water, since it reaches a high sedimentation rate of 34.2, 37.44, and 45.36 m/h, with doses of 5, 10, and 15 g/t respectively, and a low turbidity rate (31 Formazin Nephelometric Units (FNU)) at low flocculant dosages.

中文翻译:

添加絮凝剂和KCl对锂辉石尾矿沉降率的影响

近年来,锂已成为一个非常重要的元素,因为在其各种应用中包括电池的制造,并且它是电动汽车等新产品不断发展的重要组成部分。另一方面,锂储量的地理分布非常不均匀。现有矿产中,只有一部分是重要的开采来源,如南美洲的盐,而其他国家的矿藏如锂辉石则较为突出。从锂辉石中获取锂的过程包括通过浮选浓缩高达 3% 的锂。由于与该矿物伴生的其他矿物主要是硅酸盐(长石、粘土、石英和云母),因此在增稠阶段会产生很大的问题。本文力求研究絮凝剂和KCl的添加对沉降速率的影响,以及其对不同类型水中上清液浊度的影响。这是通过尾矿浆的批量沉降测试完成的,随后通过澄清水的浊度来表征纸浆和上清液。Magnafloc-338絮凝剂在工业用水中使用最为方便,沉降速度高达34.2、37.44和45.36 m/h,剂量分别为5、10和15 g/t,浊度低率(31 Formazin Nephelometric Units (FNU))在低絮凝剂剂量下。随后通过澄清水的浊度来表征纸浆和上清液。Magnafloc-338絮凝剂在工业用水中使用最为方便,沉降速度高达34.2、37.44和45.36 m/h,剂量分别为5、10和15 g/t,浊度低率(31 Formazin Nephelometric Units (FNU))在低絮凝剂剂量下。随后通过澄清水的浊度来表征纸浆和上清液。Magnafloc-338絮凝剂在工业用水中使用最为方便,沉降速度高达34.2、37.44和45.36 m/h,剂量分别为5、10和15 g/t,浊度低率(31 Formazin Nephelometric Units (FNU))在低絮凝剂剂量下。
更新日期:2021-06-21
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