(1. 北京科技大學(xué) 金屬礦山高效開(kāi)采與安全教育部重點(diǎn)實(shí)驗(yàn)室，北京 100083；
2. 北京科技大學(xué) 土木與環(huán)境工程學(xué)院，北京 100083)
摘 要: 含水率對(duì)礦堆內(nèi)氣液流動(dòng)狀態(tài)和溶質(zhì)運(yùn)移具有重要影響，氣體滲透率隨含水率的增高而降低，溶液滲透率和溶質(zhì)運(yùn)移通量均隨含水率的增大而增大。通過(guò)開(kāi)展礦堆含水率管柱實(shí)驗(yàn)，研究礦石粒徑和溶液噴淋強(qiáng)度對(duì)礦堆含水率的影響規(guī)律，并利用Design-Expert軟件對(duì)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行響應(yīng)曲面分析，得到含水率關(guān)于噴淋強(qiáng)度和礦石粒徑的擬合方程。結(jié)果表明：噴淋強(qiáng)度和礦石粒徑均對(duì)礦堆含水率有重要影響。含水率隨著礦石粒徑的增大而減小，隨噴淋強(qiáng)度的增大而增大。礦石粒徑對(duì)礦堆含水率的影響大于溶液噴淋強(qiáng)度的影響，礦石粒徑越大，溶液噴淋強(qiáng)度對(duì)礦堆含水率的影響越小。
關(guān)鍵字: 堆浸；含水率；氣液滲流；溶質(zhì)運(yùn)移；礦石粒徑；噴淋強(qiáng)度
（1. Key Laboratory of High-Efficient Mining and Safety of Metal, Ministry of Education,
University of Science and Technology Beijing, Beijing 100083, China;
2. School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:The moisture content has significant influence on the state of gas-liquid flow and solute transport in ore heap. The gas permeability decreases with increasing the moisture content. While the liquid permeability and solute transport flux both increase with broadening the moisture content in ore heap. Several column tests were performed using periodic infiltration of water on columns composed of ore. To explore the effect of ore particle size and irrigation rate on moisture content in the ore heap. Response surface analysis of experimental data was conducted by adopting the Design-Expert software, and the fitting equation of moisture content on irrigation rate and particle size was provided. The result shows that the moisture content decreases with increasing the ore size, and the moisture content increases as the irrigation rate increases. The ore size has more important role than the irrigation rate on moisture content in ore heap. The bigger the particle size is, the smaller the impact of irrigation rate on moisture content is.
Key words: heap leaching; moisture content; gas-liquid flow; solute transport; ore size; irrigation rate
