Application and adsorption mechanism of 1-(3-(trifluoromethyl)phenyl)thiourea: A novel selective collector for flotation separation of azurite from K-feldspar - Qiuyue Sheng; Long Li; Wenjing Feng; Zhifeng Zhao; Yonghang Luo; Yuxuan Yang; Zhanglei Zhu; Ningning Zhang; Wanzhong Yin (Minerals Engineering, 2026)