鑫旺草酸盐脱除方案力拓提供的流程和平衡数据.doc

鑫旺草酸盐脱出方案1 •工艺流程方案见附图2 •总平布置方案按原总图配置3•本改造需新增工序：细种子沉降、细种子过滤洗涤、草酸盐苛化 涉及改造的工序有：精液热交换、分解分级、石灰消化、蒸发站4•针对该矿有机物含量偏高可能对生产造成严重影响，建议就该矿作 加工试验，主要考察：有机物在溶出、赤泥分离洗涤的分布以及对分 解的影响5•为了有机物排除工艺能与原有工序的很好衔接，保障改造后整个生 产的正常运行，建议提供原贵阳院的工艺设计条件、指标、物流量6•与供矿商交流建议：要求提供有机物在生产流程中的分布（多少会 进入溶液、多少会进入赤泥、多少转为草酸钠、非草酸钠有机物有多 少），有机物浓度对分解的影响，草酸钠的析出与溶解的条件东北大学设计研究院（有限公司）2012-7-12根据力拓试验和经验，在生产过程中矿石中有机物分解为各种杂质的的情况如下：韦伯矿的成份:% AI2O3 Total -54.33%% SiO2 Total6.62%% F62O39.53%%CaO0.0%%TiO22.55%% Humidity11.0%%corg0.22%% Gibbsitic AI2O340.2%% Bohemitic AI2O39.9%% Kaolinintic AI2O34.33%% SiO2 Quartz1.53%(s) CO2 in DSP (s) ・13.6%⑸ ^CO2(I) ・8.6%⑸ 9 Cox (1) ・18.6%⑸今＜3呵(1) ・35.9%orgorgorgorg c c c C %%%%鑫旺1000kt/a氧化铝厂，力拓根据鑫旺提供的过程数据，结合他们的经验提供的数据和工艺流程:Xinwa ng DataCo Precipitation OptionOperating Factor%9595Production AI2O3Vh120,2120,2Product! onkt/y10001000Precipitation Yieldg/l87,985,4Evaporation Rate Conventional Evaporator Evaporation Rate SuperconcentratorVhVh277337Soluble Sofia Loss Mudkg Na2O/t4,04,0Soda fryrrnDductppm Na2O35002829Dry BauxiteVh281,4281,5Bauxite Factort Bx/t AI2O32,3422,342Mud Factort Mud/t AI2O30,995Flowrat^^Pregnar^ztquor (After HID)m3/h13311476Spent Liquor (After HID)m3/h12971432Strong Evaporated Liquorm3/h1123m3/h607645C=Jic ConcentrationsPregnant Liquorg/l Na2O170.0170,0Spent Liquorg/l Na2O181,3171,8Strong Evaporated Liquorg/l Na2O230.0229,9Dilutiong/l Na2O46,337,6RPPregnant Liquor Spent Liquor0,6211,1390,636Strong Evaporated Liquor0,5940,607Dilution1,0320,956ImpuritiesLevelsPump l^jxalate——.9/I N8202041,6Pregnant Liquorg/l Na2Co042,7Pregnant Liquor Corg(NOOC)g/l Cora117Pregnant Liquor C/S0,92100万t/a氧化铝流程草酸盐排除工艺杂质平衡Oxalate Generationt/hNa2C2O40,64kg/tNa2C2O45,35Soluble Oxalate Removal With Red Mudt/hNa2C2O40,01kg/tNa2C2O40,07Solid Phase Oxalate Removal With Red Mudt/hNa2C2O40,63kg/tNa2C2O45,28Total Exitt/hNa2C2O40,64kg/tNa2C2O45,35CO2 Generationt/h CO20,50kg COM4,2CO2 Exiting With DSPt/h CO20,31kg CO2A2,6CO2 Exiting With Soluble Losses Red Mudt/h CO20,02kg C02/t0,1CO2 Exiting With CaCO3（s） in Red Mudt/h CO20,03kg CO2A0,3CO2 Exiting With Purget/h CO20,15kg CO2A1.2Total Exitt/h CO20,50kg C02/t4,2C Gen erati ont/h Corg0,22kg C/t1,85C Removal With Soluble Losses Red Mudt/h Corg0,02kg C/t0,16C Removal With Purget/h Corg0,20kg C/t1,68Total Exitt/h Corg0,22kg C/t1,85Fiqu伦 3:・ White $id© For Xinwsnq Simplified PFD For Co Precipitatiofi OptionCwrse SeedFlterFltitePrecrartLbcucr.^fljcreratcc5CILtonPrcdLctC)ccr«-*e- 3 FCoarseFigure 4:・ Oxalate Caustification For Xinwang Simplified PFD For Co Precipitation OptionCaC2O4 ToRed MudFiltratio n。