2) magnetizing roasting
磁化焙烧
1.
Study on Process of Magnetizing Roasting-Low Intensity Magnetic Separation of Refractory Limonite in Guizhou
贵州某难选褐铁矿磁化焙烧弱磁选试验研究
2.
The arsenolite cinders were treated by the processes of oxidizing roasting-pyrolusite pulp absorption,magnetizing roasting-magnetic separation and acid leaching.
采用氧化焙烧—软锰矿浆吸收、磁化焙烧—磁选、酸浸工艺处理砷华废渣。
3.
Technical processes such as high intensity magnetic separation,magnetizing roasting-magnetic separation,magnetic roasting-magnetic separation-reverse flotation were introduced and compared,thereafter,the process of magnetizing roasting-magnetic separation was adopted,and an iron concentrate with an iron grade and recovery of 58.
针对其性质,进行了强磁选、磁化焙烧-磁选、磁化焙烧-磁选-反浮选等多种工艺方案的试验研究。
3) Magnetization roasting
磁化焙烧
1.
Pilot-plant test of magnetization roasting of Daxigou siderite ore(grade 26.
82%)进行了中性磁化焙烧半工业试验。
4) magnetic roasting
磁化焙烧
1.
Thermodynamic conditions of magnetic roasting are analyzed.
磁化焙烧-磁选分离的技术路线,是解决菱铁矿含量较高的大冶铁矿尾矿中低品位难选红铁矿(w(TFe)=34%左右)的有效工艺。
2.
The processes for fine iron ore treating in fluidized bed are introduced,the processes of magnetic roasting for iron concentrates,fine iron ore preheating and low degree pre-reduction for iron bath smelting reduction,direct reduction iron or iron carbide for EAF,and high reduction degree pre-reduction of iron ore powder for smelting gasifier et al are reviewed.
评述了流化床处理粉铁矿的工艺,根据流化床反应器在工业中的应用实际,分别评述了流化床磁化焙烧生产铁精矿,流化床预热粉铁矿并低预还原度还原后添加到铁浴熔池,流化床生产直接还原铁(DRI)和碳化铁(Fe3C)作电炉炼钢原料,多级流化床生产较高预还原度DRI供熔融气化炉终还原冶炼铁水等工艺中流化床反应器的应用。
3.
When the pyrite cinder is mixed with reducible coal in a certain ratio, the weak magnetic Fe_2O_3 in pyrite cinder is effectively reduced to strong magnetic Fe_3O_4 by magnetic roasting with roasting time of 12 min and filling rate of 11% at 700 ℃ in the rotary kiln, and the magnetic rate is 2.
用回转窑焙烧硫铁矿烧渣的磁化焙烧实验研究结果表明:硫铁矿烧渣与还原煤按一定比例混合,经回转窑磁化焙烧,在700℃下焙烧10min、物料填充率为11%时,能有效地将烧渣中弱磁性Fe2O3还原成强磁性Fe3O4,磁化率(ωTFe/ωFeO)可达2。
5) magnetizing roast
磁化焙烧
1.
Application of magnetizing roast method to the synthetic recovery of valuable minerals from tails of cleaning mill of Mian County Alluvial Gold Mine;
磁化焙烧法在勉县砂金矿精选厂尾矿综合回收中的应用
补充资料：磁化焙烧
磁化焙烧
magnetizing roasting
C一hUQ beish00磁化焙烧(magenetizing roasting)加热矿物原料在低于其熔点和一定气氛中使弱磁性铁矿物转变为强磁性铁矿物的熔烧方法，属磁选分离、富集的预处理作业。原料中的弱磁性铁矿物是赤铁矿、菱铁矿、褐铁矿、黄铁矿，生成的强磁性铁矿物为磁铁矿、y-FeZO3、磁硫铁矿。 磁化焙烧的气氛随矿石种类而异。赤铁矿于823K温度下在还原气氛下转变为磁铁矿，褐铁矿(ZFeZO3·3H20)脱水后也被还原成磁铁矿。菱铁矿、菱镁铁矿和含菱铁矿与赤铁矿之比大于1的混合矿石，在中性气氛和573一673K温度下，碳酸亚铁分解生成磁铁矿和能使赤铁矿还原成磁铁矿的一氧化碳。当混合矿石中的菱铁矿:赤铁矿<1时，需先使菱铁矿在氧化气氛中分解氧化成赤铁矿，再在还原气氛下还原成磁铁矿。 磁化焙烧也有将生成的磁铁矿在非氧化气氛中冷却到573一673K温度，再送入空气氧化磁铁矿成强磁性的赤铁矿(不FeZO3)的。这个反应产生的热量很大，可明显降低焙烧的燃料消耗。 黄铁矿磁化焙烧在钢铁冶金中有较大的实际意义，一般在大型回转窑中进行焙烧。控制供氧量可将黄铁矿精矿氧化成强磁性的磁硫铁矿或磁铁矿。黄铁矿精矿流态化氧化焙烧成磁铁矿、502烟气制酸的工艺已为斯堪的纳维亚半岛中的某些工厂采用。有色金属冶金中也有应用磁化焙烧一磁选工艺的。如含钦错矿石在1127K温度下经还原磁化焙烧后，含钦的金红石矿物的磁化率提高了24~49倍，经磁选可产出金红石、错石两种精矿。 (夏忠让)
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