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为降低烧结矿的含SiO_2量,神户厂采用了新的烧结造球工艺:即以低SiO_2褐铁矿作球核,以低SiO_2,低Al_2O_3铁精粉作粘附相;另外,适当提高烧结矿的碱度和MgO含量。采用这种工艺,神户厂烧结矿的SiO_2含量已由5.6%降到了4.9%。尽管低SiO_2烧结矿的RDI(低温还原粉化率)有所提高,但其还原性和高温性能有很大改善。神户3号高炉使用低SiO_2烧结矿后,尽管高炉上部透气性有所降低,但由于高炉下部透气性大大改善,使高炉料柱的总压损降低,从而为进一少增加焦炭负荷和喷煤量创造了条件。
In order to reduce the amount of SiO 2 in sinter, a new sintering process was adopted in Kobe Plant: low SiO 2 limonite was used as the core and low SiO 2 and low Al 2 O 3 iron powder was used as the adherent phase. In addition, Mine alkalinity and MgO content. With this process, the SiO 2 content of the sinter in Kobe Plant has been reduced from 5.6% to 4.9%. Although low SiO 2 sinter RDI (low temperature reduction pulverization rate) increased, but its reduction and high temperature performance has greatly improved. The use of low SiO 2 sinter at Kobe No.3 blast furnace reduced the total pressure loss of the blast furnace column due to the greatly improved permeability of the blast furnace bottom due to the lower air permeability in the upper part of the blast furnace, Quantity created the conditions.