火焰原子吸收光谱法测定铜镍矿浮选产品中铜、镍、镁

研究了用火焰原子吸收光谱法在同一溶液体系中直接快速测定金川铜镍矿浮选产品中铜、镍、镁含量的新方法。考察了产品中高含量的 Si O2 对测定镁的干扰情况 ,并提出了排除这项干扰的简便方法。根据各元素的标准溶液系列的测定数据 ,推算出了铜、镍、镁 3元素的线性回归方程及线性相关系数 ;特征浓度铜为 0 .4 0 mg· L-1/1% ,镍为 0 .4 8mg·L-1/1% ,Mg为 0 .0 18mg·L-1/1% ;线性浓度范围铜、镍均为 0— 10 mg·L-1,镁为 0 .2— 1.2 mg·L-1。相对标准偏差铜为 2 .5 % (n=6 ) ,镍为 2 .3% (n=6 ) ,镁为2 .8% (n=6 ) ,加标回收率铜为 96 .5 %— 10 2 .5 % ,镍为 98.8%— 10 3.5 % ,镁为 98.2 %— 10 2 .5 %。这种方法操作简便、快速、实用 ,具有较好的精密度和准确度 。

山西某低品位铝土矿浮选产品沉降试验研究

以山西某低品位铝土矿浮选产品为研究对象,开展了浮选产品性质分析及沉降试验研究。考察了沉降浓度、絮凝剂类型及用量对沉降的影响,确定了适用于铝精矿和尾矿沉降的、较为合理的沉降浓度、絮凝剂类型和用量,为选矿厂的设计提供数据资料。

某金铜矿石分质分段浮选回收金铜矿物的选矿工艺研究

随着易选硫化铜矿资源的逐渐减少,难选氧化铜矿的回收利用成为矿物加工领域重要的研究方向。某金铜矿石中铜和金的品位分别为1.86%和3.52 g/t,矿石中独立金矿物粒度细小,基本在1μm以下,或以微细粒包裹于金属矿物或脉石矿物中,且该矿石铜的氧化率为91.85%,该矿石属于难选矿石。为最大程度地回收矿石中的有价组分,根据矿石性质,进行不同的浮选产品方案对比,确定采用分质分段浮选工艺回收矿石中的金、铜,即矿石优先浮选硫化铜矿物以及载金硫化矿物以得到合格的金铜精矿;对优先浮选尾矿再浮选回收氧化铜矿物,得到金计价的铜精矿产品,即通过分质分段浮选工艺流程对矿石中的有价组分进行了回收利用。在详细浮选条件试验的基础上进行了小型闭路试验,最终可获得铜品位15.39%、金品位152.39 g/t的金铜精矿和铜品位28.02%、金品位10.39 g/t的铜精矿,总精矿铜品位24.73%、金品位47.41 g/t,铜总回收率87.41%、金总回收率88.32%的选别指标,选别指标较理想。

玉龙铜矿开发思路和提铜工艺探讨

根据实验室和半工业试验的研究成果和基建进展的实际情况,就玉龙铜矿总体开发的思路,处理氧化矿采用全堆浸工艺、半堆半浸,硫化矿处理采用浮选工艺的产品方案,早日实现氧化矿和硫化矿共同开采以及强化玉龙铜矿试验研究的必要性进行了论证。

Comparisons between Flotation Deinking Abilities of Newsprint Paper by Using Enzyme and Chemicals

The aim of this research is to study the floatation deinking abilities of black mold enzyme and chemicals in newsprint paper application. In this experiment, the properties of deinked pulp from three different additives--chemicals, black mold enzyme, and chemicals together with black mold enzyme, are studied. The first part of the experiment was to find the optimal amount of chemicals and the optimal pH through the use of sodium hydroxide and surfactant. As a result, 0.2% of sodium hydroxide and 0.4% of surfactant on oven dried weight at pH 9 was found to be the optimal condition for the deinked pulp to yield the lowest ERIC （effective residual concentration） and the highest brightness. The second part of the experiment was to find the optimal amount of black mold enzyme used in the deinking process. As a result, the optimal condition for deinked pulp to retain the lowest ERIC and the highest brightness was 100 ppm of black mold enzyme and 10 minutes of enzyme reaction time. The third part of experiment was to study the de-inking ability of black mold enzyme and chemicals. Consequently, with 30 min of chemicals reaction time and 60 min of black mold reaction time, the deinked pulp retained low ERIC but higher brightness.