H_2O_2和Na_2SO_4晶种对高硫种分母液强化排盐的影响
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摘要
研究添加Na_2SO_4晶种及H_2O_2对高硫种分母液蒸发排盐的影响及机理。结果表明,H_2O_2或Na_2SO_4的添加能促进母液排盐,且随其添加量增加,碳酸钠、硫盐的析出率及总排盐率均增加。当添加4.5g/L的Na_2SO_4晶种时,排盐率增加至73%;添加6mL H_2O_2时,母液排盐率为67.96%,相比未添加时增加了8.73个百分点;复合添加6mL H_2O_2和4.5g/L Na_2SO_4晶种时,排盐率达到78.26%,且溶液黏度降低明显,NaAlO_2的析出率降低。与原液排盐渣相比,添加Na_2SO_4晶种或H_2O_2排盐渣有Na_6CO_3(SO_4)_2复盐的析出,且排盐渣成分变化较大。
Effect and mechanism of Na_2SO_4 seed and H_2O_2 addition on enhanced salt discharge of evaporation of high-sulfur seeded precipitation spent liquor were investigated.The results show that salts discharging can be promoted by adding H_2O_2 and Na_2SO_4.Salting-out rate of sodium carbonate and sulfosalt rises with increase of adding volume of H_2O_2 and Na_2SO_4.Brine rate of high-sulfur seeded precipitation spent liquor rises to 73% with addition of 4.5 g/L Na_2SO_4.Brine rate high-sulfur seeded precipitation spent liquor rises from 59.23% to 67.96% with addition of 6 mL H_2O_2.Upon adding 4.5 g/L Na_2SO_4 together with 6 mL H_2O_2 into solution,brine rate is 78.26%,viscosity of solution drops obviously,and salting-out rate of NaAlO_2 also drops.Compared with salt residue from original solution,Na_6CO_3(SO_4)_2 is separated from salt residue with addition of Na_2SO_4 or and H_2O_2,and composition of salt residue changes greatly.
Effect and mechanism of Na_2SO_4 seed and H_2O_2 addition on enhanced salt discharge of evaporation of high-sulfur seeded precipitation spent liquor were investigated.The results show that salts discharging can be promoted by adding H_2O_2 and Na_2SO_4.Salting-out rate of sodium carbonate and sulfosalt rises with increase of adding volume of H_2O_2 and Na_2SO_4.Brine rate of high-sulfur seeded precipitation spent liquor rises to 73% with addition of 4.5 g/L Na_2SO_4.Brine rate high-sulfur seeded precipitation spent liquor rises from 59.23% to 67.96% with addition of 6 mL H_2O_2.Upon adding 4.5 g/L Na_2SO_4 together with 6 mL H_2O_2 into solution,brine rate is 78.26%,viscosity of solution drops obviously,and salting-out rate of NaAlO_2 also drops.Compared with salt residue from original solution,Na_6CO_3(SO_4)_2 is separated from salt residue with addition of Na_2SO_4 or and H_2O_2,and composition of salt residue changes greatly.
引文
[1]王家伟,贾永真,李军旗,等.硫化钠对铝酸钠种分母液蒸发排盐的影响[J].湿法冶金,2014,33(1):32-37.
[2]毕诗文.氧化铝生产工艺[M].北京:化学工业出版社,2006:17-31.
[3]张少云.铝土矿溶出条件对铝酸钠溶液结构影响的研究[D].长沙:中南大学,2010.
[4]李军旗,王镇,王家伟,等.贵州某高硫铝土矿氧化铝溶出研究[J].应用化工,2010,39(10):1528-1531.
[5]贾永真,王家伟,李军旗,等.硫含量对铝酸钠种分母液盐蒸发结晶析出的影响[J].过程工程学报,2013,13(5):801-806.
[6]CHAI Q Q,YANG C H,TEO K L,et al.Optimal control of an industrial-scale evaporation process:Sodium aluminate solution[J].Control Engineering Practice,2012,20(6):618-628.
[7]彭志宏,陈科云,李小斌,等.铝酸钠溶液蒸发过程中的结垢与防垢[J].中南大学学报(自然科学版),2008,39(1):69-74.
[8]贾永真,王家伟,李军旗,等.亚硫酸钠对铝酸钠种分母液排盐的影响[J].有色金属(冶炼部分),2013(10):20-22.
[9]谢雁丽.铝酸钠溶液晶种分解[M].北京:冶金工业出版社,2003:83-85.
[10]杨桂丽,娄世彬.拜耳法种分母液蒸发过程中钠盐析出规律的试验研究[J].轻金属,2006(9):18-21.
[11]王熙慧,于海燕,卢东,等.硫酸钠对铝酸钠溶液种分过程的影响[J].材料与冶金学报,2007,6(3):184-187.
[12]杨夏琼,陈朝轶,李军旗,等.硫对钢材碱性腐蚀的研究综述[J].表面技术,2015,44(9):89-95.
[13]丁安平,杨权平.山西铝厂拜尔法系统碳酸钠的危害及排除措施[J].有色冶炼,2000,29(5):10-14.
[14]黄芳,袁华俊,陈义,等.氧化铝生产流程中碳酸钠结晶变性机理研究[J].轻金属,2006(9):12-17.
[15]KAROLY S,MARTA GK,ELEONORA M.Determination and evaluation of organic balances of alumina refineries[C]//Light Metals,California:TMS,1996:29-35.
[16]张玉通.铝酸钠溶液蒸发过程中草酸钠的结晶析出行为[D].长沙:中南大学,2013.
[17]魏国令,李军旗,陈朝轶,等.硫对含草酸钠铝酸钠溶液蒸发排盐的影响[J].有色金属(冶炼部分),2016(7):26-29.
[18]梁春来.溶出自蒸发和种分母液的Na2CO3、Na2SO4平衡溶解度试验研究[J].世界有色金属,1999(6):25-28.
[2]毕诗文.氧化铝生产工艺[M].北京:化学工业出版社,2006:17-31.
[3]张少云.铝土矿溶出条件对铝酸钠溶液结构影响的研究[D].长沙:中南大学,2010.
[4]李军旗,王镇,王家伟,等.贵州某高硫铝土矿氧化铝溶出研究[J].应用化工,2010,39(10):1528-1531.
[5]贾永真,王家伟,李军旗,等.硫含量对铝酸钠种分母液盐蒸发结晶析出的影响[J].过程工程学报,2013,13(5):801-806.
[6]CHAI Q Q,YANG C H,TEO K L,et al.Optimal control of an industrial-scale evaporation process:Sodium aluminate solution[J].Control Engineering Practice,2012,20(6):618-628.
[7]彭志宏,陈科云,李小斌,等.铝酸钠溶液蒸发过程中的结垢与防垢[J].中南大学学报(自然科学版),2008,39(1):69-74.
[8]贾永真,王家伟,李军旗,等.亚硫酸钠对铝酸钠种分母液排盐的影响[J].有色金属(冶炼部分),2013(10):20-22.
[9]谢雁丽.铝酸钠溶液晶种分解[M].北京:冶金工业出版社,2003:83-85.
[10]杨桂丽,娄世彬.拜耳法种分母液蒸发过程中钠盐析出规律的试验研究[J].轻金属,2006(9):18-21.
[11]王熙慧,于海燕,卢东,等.硫酸钠对铝酸钠溶液种分过程的影响[J].材料与冶金学报,2007,6(3):184-187.
[12]杨夏琼,陈朝轶,李军旗,等.硫对钢材碱性腐蚀的研究综述[J].表面技术,2015,44(9):89-95.
[13]丁安平,杨权平.山西铝厂拜尔法系统碳酸钠的危害及排除措施[J].有色冶炼,2000,29(5):10-14.
[14]黄芳,袁华俊,陈义,等.氧化铝生产流程中碳酸钠结晶变性机理研究[J].轻金属,2006(9):12-17.
[15]KAROLY S,MARTA GK,ELEONORA M.Determination and evaluation of organic balances of alumina refineries[C]//Light Metals,California:TMS,1996:29-35.
[16]张玉通.铝酸钠溶液蒸发过程中草酸钠的结晶析出行为[D].长沙:中南大学,2013.
[17]魏国令,李军旗,陈朝轶,等.硫对含草酸钠铝酸钠溶液蒸发排盐的影响[J].有色金属(冶炼部分),2016(7):26-29.
[18]梁春来.溶出自蒸发和种分母液的Na2CO3、Na2SO4平衡溶解度试验研究[J].世界有色金属,1999(6):25-28.