Method for preparing low-silicon superhigh-alkalinity sintered ore
A kind of sintering and ultra-high technology, which is applied in the field of iron and steel metallurgy, can solve the problems of low content and declining yield, and achieve the effect of strengthening the sintering process, increasing the strength and yield, and increasing the sintering temperature
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Embodiment 1
[0022] The raw materials and other steps and parameters used are consistent with the existing method; the material layer is increased to 700mm; the pressing material is pressed down by 20mm; the ignition time is extended to 2.0 minutes; the ignition temperature is increased to 1100°C to prepare sintered ore.
[0023] The results show that compared with the existing method, the strength of the sinter drum (ISO drum strength defined according to GB13242, refers to taking 7.5 kilograms of 40-10mm sintered ore and turning it in the ISO drum machine for 200 revolutions, and the grains >6.3mm The percentage of grade sinter in the weight of the whole sinter is an important index to measure the strength of the sinter, the higher the strength of the sinter, the better the strength of the sinter) increased from 72% to 73.09% to 73.86%, an increase of 1.09% to 1.86%; the finished product The rate increased from 71% to 72.27%-72.93%, an increase of 1.27%-1.93%; the output increased from 1....
Embodiment 2
[0025] The raw materials and other steps and parameters used are consistent with the existing method; the material layer is increased to 750mm when the fabric is placed; the material layer is pressed down by 30mm; the ignition time is extended to 2.5 minutes; the ignition temperature is increased to 1100°C for sintering mine.
[0026] The results show that compared with the existing method, the drum strength of sintered ore is increased from 72% to 73.96%-74.72%, an increase of 1.96%-2.72%; the yield is increased from 71% to 73.3%-73.84%, an increase of 2.3%- 2.84%; output from 1.204t / m 2 .h, increased to 1.245~1.258t / m 2 .h, increased by 3.37% to 4.51%; the low-temperature reduction pulverization rate of sintered ore decreased from 67.53% to 65.06% to 63.88%, a decrease of 2.47% to 3.65%; the content of calcium ferrite in sintered ore increased by 5.9% to 6.3%.
Embodiment 3
[0028] The raw materials used and other steps and parameters are consistent with the existing method; the material layer is increased to 750mm when the fabric is placed; the material layer is pressed down by 40mm; the ignition time is extended to 2.5 minutes; the ignition temperature is increased to 1100 ° C for sintering mine.
[0029] The results show that, compared with the base period, the strength of the sinter drum increased from 72% to 75.16% to 76.25%, an increase of 3.16% to 4.25%; the yield increased from 71% to 74.08% to 75.37%, an increase of 3.08% to 4.37% %; output from 1.204t / m 2 .h, increased to 1.262~1.274t / m 2 .h, increased by 4.81% to 5.8%; the pulverization rate of sinter low-temperature reduction decreased from 67.53% to 63.37% to 61.81%, a decrease of 4.16% to 5.72%. The calcium ferrite content of sintered ore increased by 6.5% to 7.0%.
[0030] The above examples show that after the sintering is prepared by the method of the present invention, the dru...
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