Biological column leaching of Ni from low-grade Ni ore was studied, and the effects of ore particle size on leaching rate were investigated. The Ni ore with an average Ni content of 0.23% was crushed into four different particle size fractions: >10 mm, 5–10 mm, 2–5 mm and <2 mm. The main strain components at the genus level were acidithiobacillus (53.11%), leptospirillum (43.52%), and acidiphilium (3.37%). The leaching tests were carried out at pH 2.0 and ∼23°C. The Ni leaching rates from ores with particle sizes >10 mm (bioleaching), 5–10 mm (acid leaching), 5–10 mm (bioleaching), and 2–5 mm (bioleaching) were 23.76%, 22.15%, 32.42% and 54.17%, respectively, after 180 d of bioleaching. The ore particle size changed after leaching, compared with the original ore size, the proportion of the same size of 2–5 mm ore decreased to 44.64%. Ore with particle size of 2–5 mm was most suitable for column bioleaching, and effective Ni extraction was achieved with appropriate control of ore granularity.

对低品位镍矿中镍的生物柱浸出进行了研究，考察了矿石粒度对浸出率的影响。平均镍含量为 0.23% 的镍矿石被粉碎成四种不同的粒度级分：>10 毫米、5-10 毫米、2-5 毫米和 <2 毫米。属水平的主要菌株成分为酸硫杆菌（53.11%）、钩端螺旋体（43.52%）和嗜酸菌(3.37%)。浸出试验在pH 2.0和~23°C下进行。粒度>10 mm（生物浸出）、5-10 mm（酸浸）、5-10 mm（生物浸出）和2-5 mm（生物浸出）的矿石的镍浸出率分别为23.76%、22.15%、32.42%生物浸出 180 d 后分别为 54.17%。浸出后矿石粒度发生变化，与原矿粒度相比，相同粒度2~5 mm矿石的比例下降至44.64%。粒度为2-5 mm的矿石最适合柱式生物浸出，通过适当控制矿石粒度可以实现有效的Ni提取。