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首页> 外文期刊>ISIJ international >Effect of Na2B4O7 Addition on Carbothermic Reduction of Ilmenite Concentrate
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Effect of Na2B4O7 Addition on Carbothermic Reduction of Ilmenite Concentrate

机译：Na 2 B 4 O 7 添加对钛铁矿精矿碳热还原的影响

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Ilmenite concentrate is a superior quality raw material to production of titania slag. The iron oxide of ilmenite concentrate is reduced to metallic iron and titanium oxide enriched in slag. Therefore, the enhancement reduction of ilmenite concentrate is in favor of improving the level of smelting of titania slag and reducing smelting time and decreasing energy consumption. The effect of Na_(2)B_(4)O_(7) on the carbothermic reduction of ilmenite concentrate was investigated, and the addition levels were selected as 0%, 1%, 2%, 3% and 4%, respectively. It is concluded that, under the constant reduction conditions, the metallization and particle size of iron of reduced ilmenite concentrate showed an increase first and then a slightly decrease with increasing the content of Na_(2)B_(4)O_(7), while FeO and residual carbon showed an opposite tendency. Maximum metallization rate and the largest size of metallic iron were 89.5% and 113 μ m at 2% Na_(2)B_(4)O_(7) content, respectively. FeO content was decreased from 11.58% to 4.23% and then increased to 5.81%, while residual C from 2.73% to 2.34% and then to 4.2%. The main phases of all the reduced samples were (Fe Mg)_(x)Ti_(y)O_(5), Fe and TiO_(2). The TG and DTG curves indicated that the mass loss of ilmenite concentrate with Na_(2)B_(4)O_(7) addition was obviously more than that without Na_(2)B_(4)O_(7). Na_(2)B_(4)O_(7) can reduce the reduction temperature of ilmenite concentrate, and the extent of the temperature reduction was 80, 114, 111 and 119°C, respectively.
机译：钛铁矿精矿是生产二氧化钛炉渣的优质原料。钛铁矿精矿的氧化铁还原为金属铁和富含炉渣的氧化钛。因此，增强钛铁矿精矿的还原有利于提高二氧化钛炉渣的熔炼水平，减少熔炼时间并降低能耗。研究了Na_（2）B_（4）O_（7）对钛铁矿精矿碳热还原的影响，添加量分别为0％，1％，2％，3％和4％。结论：在恒定的还原条件下，还原的钛铁矿精矿的铁的金属化和铁的粒径先显示出增加，然后随着Na_（2）B_（4）O_（7）的含量增加而略有减小，而FeO和残留碳显示出相反的趋势。 Na_（2）B_（4）O_（7）含量为2％时，最大金属化速率和最大铁尺寸分别为89.5％和113μm。 FeO含量从11.58％降低到4.23％，然后增加到5.81％，而残留C从2.73％降低到2.34％，然后达到4.2％。所有还原样品的主要相为（Fe Mg）_（x）Ti_（y）O_（5），Fe和TiO_（2）。 TG和DTG曲线表明，添加Na_（2）B_（4）O_（7）的钛铁矿精矿的质量损失明显大于不添加Na_（2）B_（4）O_（7）的钛铁矿的质量损失。 Na_（2）B_（4）O_（7）可以降低钛铁矿精矿的还原温度，降温程度分别为80、114、111和119℃。

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