硫酸镍煅烧的实验研究

硫酸镍煅烧可以产生镍氧化物,作为制备氧化镍的原料。以六水硫酸镍为原料,采用热重-差热分析（TG-DTA）、X射线衍射（XRD）分析研究了其煅烧过程并对产物进行了表征。研究结果表明,硫酸镍煅烧过程分为3个阶段：第一阶段（27~250 ℃）及第二阶段（250~600 ℃）为脱水阶段;第三阶段（600~900 ℃）为分解阶段。在煅烧温度为850 ℃、煅烧时间为30 min、粒度为74~147 μm条件下,硫酸镍煅烧产物为氧化镍。

Study on calcination of nickel sulfate

Nickel-based oxide was prepared by calcination of nickel sulfate,which can be used as raw material for preparation of NiO. With NiSO₄·6H₂O as raw material,the calcination process was analyzed by thermo-gravimetric and differential ther-mal analysis（TG-DTA） and the product was characterized by X-ray diffraction（XRD）.The results showed that the calcina-tion process of NiSO₄·6H₂O can be divided into three stages.The first stage（27~250 ℃） and the second stage（250~600 ℃） are the dehydration stage,and the third stage（600~900 ℃） is the decomposition stage.NiO was prepared from NiSO₄·6H₂O under the conditions as follows：calcination time was 30 min,calcination temperature was 850 ℃ and particle size was at 74~147 μm.