Understanding the agglomeration behavior of nickel laterite and gold ores using statistical design of experiments
Understanding the agglomeration behavior of nickel laterite and gold ores using statistical design of experiments
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使用实验统计设计了解镍红土和金矿石的团聚行为
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Free
中科院分区：
文献类型：
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作者：
N. Dhawan;M. Safarzadeh;J. D. Miller;M. Moats;M. Free
采用田口L16（45）正交表设计实验，优化了镍红土矿和金矿的转鼓造块工艺，确定了最佳造块条件，使平均造块粒度最大化，细粉含量最小化。包括水分含量在内的可控操作因素的影响（红土镍矿：34-37%;金矿：7-10%），保留时间（2-3.5分钟），滚筒速度（15-45%临界速度），滚筒负载（红土镍矿：8- 32%;金矿：6-22%）和酸浓度（150-600 g/L）对造块工艺性能的影响。对于红土镍矿，在下列条件下出现最大平均附聚物尺寸和最小细粉百分比（-1mm）：转鼓负荷（23.7%）、水分（36.5%）、时间（3分钟）、转鼓速度（30%临界速度）和酸浓度（150 g/L）。在所研究的红土镍矿条件下，最有效的参数，最大限度地提高平均团聚体的大小和最小化的罚款量被发现是鼓负荷和酸浓度，分别。滚筒速度对最小化细粉量具有统计学显著影响。金矿石的最大平均团聚体尺寸和最小细粉百分比（-1 mm）发生在以下条件下：滚筒负载（19.3%），水分（8.5%），时间（2分15秒）和滚筒速度（40%临界）。最重要的因素，最大限度地提高平均团聚体的大小和最大限度地减少金矿石的细粉的量被认为是滚筒负荷，时间和水分。
The drum agglomeration of nickel laterite and gold ores has been optimized through the design of experiments (DOE) using a Taguchi L16 (45) orthogonal array to determine the optimum conditions for maximizing average agglomerate size and minimizing the amount of fines. The effects of controllable operating factors including moisture content (nickel laterite ore: 34–37%; gold ore: 7–10%), retention time (2–3.5 min), drum speed (15–45% critical speed), drum load (nickel laterite ore: 8–32 %; gold ore: 6–22%) and acid concentration (150–600 g/L) on the performance of the agglomeration process were studied.For nickel laterite ore, maximum average agglomerate size and minimum percent fines (−1 mm) occurred under the following conditions: drum load (23.7%), moisture (36.5%), time (3 min), drum speed (30% critical speed) and acid concentration (150 g/L). Under the studied nickel laterite ore conditions, the most effective parameters for maximizing average agglomerate size and minimizing the amount of fines were found to be drum load and acid concentration, respectively. Drum speed had a statistically significant effect on minimizing the amount of fines. Maximum average agglomerate size and minimum percent fines (−1 mm) for gold ore occurred under the following conditions: drum load (19.3%), moisture (8.5%), time (2 min 15 s) and drum speed (40% critical). The most significant factors for maximizing average agglomerate size and minimizing the amount of fines for gold ore were found to be drum load, time and moisture.