The present invention relates to a magnesia-iron-calcium complex composite flux for iron-making sinter, whose components are as follows: organic high-viscosity material 0.25%-0.75%, oxygen-increasing sinter 11%-13%, flux carrier 86.25%-88.75% by mass percentage. The organic high-viscosity material is one or two mixtures of carboxymethyl cellulose and water-soluble resin, the mass percentage is 0.25%-0.75.0%. The oxygenated sinter is iron oxide red (Fe2O3). Its particle size is less than 0.044 mm and its mass percentage is 11%-13%. The flux carrier is one or two mixtures of high iron and high calcium reburned magnesia powder and calcite powder. The mass percentage of the carrier is 86.25%~88.75%. The invention can bind more than 90% of the sintering mixture into spheres, improve the permeability of the sintering layer, and is beneficial to increasing the height of the sintering layer and reducing the consumption of solid fuel to achieve low-temperature sintering. In order to improve the permeability of sinter bed and increase the sintering speed and output, low negative pressure suction sintering can be used to save power consumption and energy.
【技术实现步骤摘要】
一种炼铁烧结矿用镁铁钙络合化复合熔剂
本专利技术涉及冶金用熔剂
,特别涉及一种炼铁烧结矿用镁铁钙络合化复合熔剂。
技术介绍
1、炼铁烧结矿是高炉炼铁的主要原料。现代铁矿开采富铁矿已经越来越少,绝大部分需要进行粉矿和磨选的贫矿。贫矿经过破碎、选矿之后粒度很细。为了满足冶炼所需,必须将这些初矿或细精矿造块,使其变成具有一定粒度的矿石才能作为炉料所用。天然富矿的粒度一般为0~8mm,细精矿粉的粒度小于0.074mm的占40%左右。当采用部分细精矿或全部细精矿为烧结含铁原料时,烧结料层透气性差,很难实现厚料层及低温烧结,致使烧结矿产量低、质量较差。2、传统的烧结矿生产工艺是将细精矿与熔剂烧结料制成一定粒度的小球进行烧结。在传统的烧结矿生产中,使用生石灰经过水化形成石灰乳将铁矿粉及其它熔剂粘结在一起进行烧结。由于生石灰的粒度一般在0~5mm,在水化过程中不能完全水化。形成的石灰乳的粘结性能很低,铁矿粉及其它熔剂粘结成为小球的效率很低,一般仅能达到35%~50%左右,并且料球的强度很低易碎。3、当采用部分细精矿或全部细精矿为烧结含铁原料时,烧结料层透气性差,很难实现厚料 ...
【技术保护点】
1.一种炼铁烧结矿用镁铁钙络合化复合熔剂,其特征在于,组分按质量百分比为:有机高粘材料0.25%~0.75%;增氧烧结剂11%~13%;熔剂载体86.25%~88.75%。
【技术特征摘要】
1.一种炼铁烧结矿用镁铁钙络合化复合熔剂,其特征在于,组分按质量百分比为:有机高粘材料0.25%~0.75%;增氧烧结剂11%~13%;熔剂载体86.25%~88.75%。2.根据权利要求1所述的一种炼铁烧结矿用镁铁钙络合化复合熔剂,其特征在于,所述的有机高粘材料为羧甲基纤维素和水溶性树脂中的一种或两种的混合物,质量百分数0.25%~0.75.0%。3.根据权利要求1所述的一种炼铁烧结矿用镁铁钙络合化复合熔剂,其特征在于,所述的增氧烧结剂为氧化铁红,质量百分数11%~13%。4.根据权利要求1所述...
【专利技术属性】
技术研发人员:盛开勋,周明顺,夏海航,李宏富,
申请(专利权)人:辽宁科大托田炉料有限公司,
类型:发明
国别省市:辽宁,21
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