(中南大學(xué) 資源與安全工程學(xué)院，長沙 410083)
摘 要: 以某鉛鋅銀礦全尾砂漿恒定剪切流變實(shí)驗為例，探討不同質(zhì)量濃度下，APAM添加前后似膏體流變參數(shù)的變化，并分析影響機(jī)理。結(jié)果表明：APAM使砂漿更加穩(wěn)定；APAM增大砂漿的切應(yīng)力和表觀黏度值；質(zhì)量濃度越大，砂漿的平衡切應(yīng)力和平衡表觀黏度增大值越大，隨剪切速率的增加，平衡切應(yīng)力和平衡表觀黏度增加幅度減小。隨剪切速率增加，APAM高分子破壞程度加大，“橋連”對流變參數(shù)的作用情況增強(qiáng)；隨質(zhì)量濃度增大，APAM高分子對流變參數(shù)的影響程度加強(qiáng)，隨剪切速率的增加，流變參數(shù)的增大值減小。
關(guān)鍵字: APAM；似膏體；質(zhì)量濃度；流變參數(shù)
（School of Resources and Safety Engineering, Central South University, Changsha 410083, China）
Abstract:Take rheological test with constant shear of full tailings slurry of a Pb-Zn-Ag mine as example, the changes of rheological parameters of paste-like slurry were discussed before or after APAM addition under different mass concentrations, and the influence mechanism was analyzed. The results show that APAM makes slurries more stable. APAM enlarges values of shear stress and apparent viscosity. With the increase of mass concentration, increment values of stabilized shear stress and stabilized apparent viscosity of slurries grow, and the increase of stabilized shear stress and stabilized apparent viscosity decreases with increasing shear rate. With the increase of shear rate, destructiveness of APAM macromolecule grows, effect degree of linking on rheological parameters grows. As the increase of mass concentration, influence degree of APAM macromolecule on rheological parameters grows, and increment values of rheological parameters decrease with the increase of shear rate.
Key words: APAM; paste-like slurry; mass concentration; rheological parameter
