山东冶金
山東冶金
산동야금
SHANDONG METALLURY
2015年
4期
21-23,26
,共4页
拜耳法%分解槽%结疤%α-Al(OH)3
拜耳法%分解槽%結疤%α-Al(OH)3
배이법%분해조%결파%α-Al(OH)3
Bayer process%precipitation tank%scale%α-Al(OH)3
结合山东某氧化铝厂在使用澳洲矿进行拜耳法生产中种分槽内过快结疤导致沉槽的状况，对槽内结疤的成分和表面形貌进行分析，确定种分槽内结疤以单斜晶系的α-Al（OH）3为主。分析认为，泡沫夹带、降温幅度过大、草酸盐大量析出、添加剂使用不当等均可造成结疤过快生长。根据生产情况，可以从降温幅度、泡沫夹带、有机物脱除、碱洗频率和效率、设备适当改进等方面减缓结疤的生长速度。
結閤山東某氧化鋁廠在使用澳洲礦進行拜耳法生產中種分槽內過快結疤導緻沉槽的狀況，對槽內結疤的成分和錶麵形貌進行分析，確定種分槽內結疤以單斜晶繫的α-Al（OH）3為主。分析認為，泡沫夾帶、降溫幅度過大、草痠鹽大量析齣、添加劑使用不噹等均可造成結疤過快生長。根據生產情況，可以從降溫幅度、泡沫夾帶、有機物脫除、堿洗頻率和效率、設備適噹改進等方麵減緩結疤的生長速度。
결합산동모양화려엄재사용오주광진행배이법생산중충분조내과쾌결파도치침조적상황，대조내결파적성분화표면형모진행분석，학정충분조내결파이단사정계적α-Al（OH）3위주。분석인위，포말협대、강온폭도과대、초산염대량석출、첨가제사용불당등균가조성결파과쾌생장。근거생산정황，가이종강온폭도、포말협대、유궤물탈제、감세빈솔화효솔、설비괄당개진등방면감완결파적생장속도。
According to the practical situation of an alumina factory in Shandong Province using Australia bauxite to Bayer process, the excessive scale growth causing some precipitation tanks to sink was researched. The main ingredient of the scale in the tanks, monoclinic α-Al(OH)3 was determined by the analysis of ingredient and surface topography. Analysis showed that the excessive scale growth was attributed to the superfluous slurry foam, excessive level in temperature dropping, large amounts of oxalate precipitation, bad use of additive, etc. Based on the actual production, the following measures were suggested to slow down the scale growth: temperature dropping, slurry foam eliminating, organics removing, frequency and effect of soda-washing, and equipment improving etc.
