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[5]Ji Y N,Sun T C,Jiang M,et al.The effect to nickel-bearing lat- Metall Mater Trans B,2006,37(2):215 erite by direct reduction roasting-magnetic separation with differ- 6] Murakami T,Nishimura T,Tsuda N,et al.Quantitative analysis ent types of coal.Nonferrous Met Miner Process Sect,2011,12 on contribution of direct reduction of iron oxide in carbon compos- (1):27 ite.1S0m,2013,53(10):1763 (及亚娜，孙体昌，蒋曼，等.煤种对红土镍矿直接还原培烧磁 [17]Srinivasan NS,Lahiri A K.Studies on the reduction of hematite 选的影响.有色金属（选矿部分），2011,12(1)：27) by carbon.Metall Mater Trans B,1977,8(1):175高恩霞等: 硫酸钠对高铁型红土镍矿中铁矿物还原的抑制机理 图 10 FeO 与硅酸盐接触处线扫描分析结果 Fig． 10 Ｒesults of line scanning analysis at the region where FeO contacts with the silicate 铁矿物还原成为金属铁的时间段，对以气固反应为主 的还原过程造成不利影响． 同时，碳的气化反应也受 到抑制，焙烧体系中还原气氛减弱，不利于铁矿物的 还原． ( 3) FeS 和( Na，Fe，Ca) ( Si，Al) O4形成的液相包 裹在 FeO 周围对其还原起到抑制作用． 复杂铝硅酸盐 在抑制 FeO 还原的同时与其反应生成更多液相，进一 步抑制 FeO 的还原． 参 考 文 献 ［1］ Wang C Y，Yin F，Chen Y Q，et al． Worldwide processing tech￾nologies and progress of nickel laterites． Chin J Nonferrous Met， 2008，18( Suppl 1) : 1 ( 王成彦，尹飞，陈永强，等． 国内外红土镍矿处理技术及进展． 中国有色金属学报，2008，18( 增刊 1) : 1) ［2］ Ｒao M J，Li G H，Jiang T，et al． Carbothermic reduction of nick￾eliferous laterite ores for nickel pig iron production in China: a re￾view． JOM，2013，65( 11) : 1573 ［3］ Dalvi A D，Bacon W G，Osborne Ｒ C． The past and the future of nickel laterites / / PDAC 2004 International Convention，Trade Show and Investors Exchange． Mississauga，2004: 1 ［4］ Zheng G，Zhu D Q，Pan J，et al． Pilot scale test of producing nickel concentrate from low-grade saprolitic laterite by direct re￾duction-magnetic separation． J Cent South Univ，2014，21( 5) : 1771 ［5］ Ji Y N，Sun T C，Jiang M，et al． The effect to nickel-bearing lat￾erite by direct reduction roasting--magnetic separation with differ￾ent types of coal． Nonferrous Met Miner Process Sect，2011，12 ( 1) : 27 ( 及亚娜，孙体昌，蒋曼，等． 煤种对红土镍矿直接还原焙烧--磁 选的影响． 有色金属( 选矿部分) ，2011，12( 1) : 27) ［6］ Sun T C，Ji Y N，Jiang M，et al． Influence mechanism of differ￾ent types of coal on selective nickle reduction in nickel laterite re￾duction roasting． J Univ Sci Technol Beijing，2011，33 ( 10 ) : 1197 ( 孙体昌，及亚娜，蒋曼，等． 煤种对红土镍矿中镍选择性还原 的影响机理． 北京科技大学学报，2011，33( 10) : 1197) ［7］ Zhu D Q，Cui Y，Vining K，et al． Upgrading low nickel content laterite ores using selective reduction followed by magnetic separa￾tion． Int J Miner Process，2012，106-109: 1 ［8］ Jiang M，Sun T C，Liu Z G，et al． Effects of coal types and addi￾tives on selective direct reduction of nickel laterite． Min Metall Eng，2012，32( 5) : 77 ( 蒋曼，孙体昌，刘志国，等． 煤种类及添加剂对红土镍矿选择 性直接还原的影响规律． 矿冶工程，2012，32( 5) : 77) ［9］ Sun T C，Jiang M，Liu Z G，et al． Ｒesearch on the effect of addi￾tive on selective reduction of the laterite ores with low nickel and high iron content． J China Univ Min Technol，2013，32( 5) : 838 ( 孙体昌，蒋曼，刘志国，等． 添加剂对低镍高铁红土镍矿选择 性还原的影响． 中国矿业大学学报，2013，32( 5) : 838) ［10］ Li G H，Ｒao M J，Jiang T，et al． Ｒeduction roasting--magnetic separation mechanisms of nickeliferous laterite ore in presence of sodium salts． Chin J Nonferrous Met，2012，22( 1) : 274 ( 李光辉，饶明军，姜涛，等． 红土镍矿钠盐还原焙烧--磁选的 机理． 中国有色金属学报，2012，22( 1) : 274) ［11］ Cao Z C，Sun T C，Yang H F，et al． Ｒecovery of iron and nickel from nickel laterite ore by direct reduction roasting and magnetic separation． J Univ Sci Technol Beijing，2010，32( 6) : 708 ( 曹志成，孙体昌，杨慧芬，等． 红土镍矿直接还原焙烧磁选回 收铁镍． 北京科技大学学报，2010，32( 6) : 708) ［12］ Li G H，Shi T M，Ｒao M，et al． Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate． Miner Eng，2012，32( 4) : 19 ［13］ Lu J，Liu S，Shangguan J，et al． The effect of sodium sulphate on the hydrogen reduction process of nickel laterite ore． Miner Eng，2013，49( 6) : 154 ［14］ Jiang M，Sun T C，Liu Z G，et al． Mechanism of sodium sulfate in promoting selective reduction of nickel laterite ore during re￾duction roasting process． Int J Miner Process，2013，123( 5) : 32 ［15］ Moon J，Sahajwalla V． Investigation into the role of the boud￾ouard reaction in self-reducing iron oxide and carbon briquettes． Metall Mater Trans B，2006，37( 2) : 215． ［16］ Murakami T，Nishimura T，Tsuda N，et al． Quantitative analysis on contribution of direct reduction of iron oxide in carbon compos￾ite． ISIJ Int，2013，53( 10) : 1763 ［17］ Srinivasan N S，Lahiri A K． Studies on the reduction of hematite by carbon． Metall Mater Trans B，1977，8( 1) : 175 · 957 ·