中国资源综合利用
中國資源綜閤利用
중국자원종합이용
CHINA RESOURCES COMPREHENSIVE UTILIZATION
2014年
11期
20-23
,共4页
李达%蒋开喜%蒋训雄%汪胜东%范艳青
李達%蔣開喜%蔣訓雄%汪勝東%範豔青
리체%장개희%장훈웅%왕성동%범염청
明矾石%脱水%焙烧%硫酸铝钾
明礬石%脫水%焙燒%硫痠鋁鉀
명반석%탈수%배소%류산려갑
alunite%dehydration%roasting%aluminum potassium sulfate
以明矾石精矿为原料,通过热重-差热分析和热力学分析,表明明矾石在807 K左右开始分解脱水,焙烧脱水前后样品的XRD、SEM图谱分析表明,焙烧脱水后,明矾石的晶体结构遭到破坏,明矾石矿物发生分解,生成了硫酸铝钾和氧化铝。通过非等温热重法研究了脱水过程的动力学参数:表观活化能E≈270 kJ/moL。通过实验研究,确定了明矾石脱水工艺参数,在温度873 K,焙烧时间7 min,明矾石精矿的失重率达10%,达到明矾石精矿失去结构水的理论失重率。
以明礬石精礦為原料,通過熱重-差熱分析和熱力學分析,錶明明礬石在807 K左右開始分解脫水,焙燒脫水前後樣品的XRD、SEM圖譜分析錶明,焙燒脫水後,明礬石的晶體結構遭到破壞,明礬石礦物髮生分解,生成瞭硫痠鋁鉀和氧化鋁。通過非等溫熱重法研究瞭脫水過程的動力學參數:錶觀活化能E≈270 kJ/moL。通過實驗研究,確定瞭明礬石脫水工藝參數,在溫度873 K,焙燒時間7 min,明礬石精礦的失重率達10%,達到明礬石精礦失去結構水的理論失重率。
이명반석정광위원료,통과열중-차열분석화열역학분석,표명명반석재807 K좌우개시분해탈수,배소탈수전후양품적XRD、SEM도보분석표명,배소탈수후,명반석적정체결구조도파배,명반석광물발생분해,생성료류산려갑화양화려。통과비등온열중법연구료탈수과정적동역학삼수:표관활화능E≈270 kJ/moL。통과실험연구,학정료명반석탈수공예삼수,재온도873 K,배소시간7 min,명반석정광적실중솔체10%,체도명반석정광실거결구수적이론실중솔。
In this paper,alunite concentrate,as the raw materials,was studied through TG-DTG and thermodynamics analysis. It began to dehydrate at about 807 K. The XRD and SEM results showed the crystal structure of alunite was destroyed after the dehydration process compared to the untreated concentrate,and alunite decomposed and formed aluminum potassium sulfate and alumina. The kinetic parameter was studied by non-isothermal thermogravimetry:the apparent activation energy E was about 270kJ/mol.The parameters of the alunite dehydration process also were determined in this experimental study. At the roasting temperature of 873 K, roasting time 7 min, the weight loss of alunite reached 10%, which reached the theoretical dehydration value of alunite concentrate.