各种铁矿粉的同化性及其互补配矿方法

对来自巴西、澳大利亚、南非以及国产的19种铁矿粉的同化性进行了实验测定和考察分析,在此基础上研究了基于铁矿粉同化性的互补配矿方法,并设计了九组烧结优化配矿方案.结果表明:(1)不同类型铁矿粉的同化性存在显著差异,巴西赤铁矿和国产磁铁矿的同化性低,而澳大利亚含结晶水的赤铁矿的同化性高;(2)铁矿粉的烧损含量、气孔率和Al₂O₃含量等与其同化能力呈正相关关系;(3)SiO₂和Al₂O₃以黏土形式存在的铁矿粉呈现出同化性较高的特征;(4)铁矿物晶粒小的铁矿石有相对高的同化性;(5)采用本研究的配矿方法,当劣质铁矿粉用量达50%水平时,仍可获得烧结技术指标和冶金性能优良的烧结矿,显示出基于同化性的互补配矿技术的有效性和优越性.

Assimilation of iron ores and ore matching method based on complementary assimilation

Assimilation of 19 kinds of ores from Brazil,Australia,South Africa and China was evaluated and analyzed,based on which the ore matching method was researched and 9 groups of optimizing ore matching schemes were designed.The ores of different types have apparently differences in assimilation,for example,Brazilian hematite ore and Chinese magnetite ore have very low assimilation,while Australian limonite ore has high assimilation.The assimilation of the ores has positive correlation with burning loss,porosity and Al₂O₃ content.The iron ores in which SiO₂ and Al₂O₃ exist in the form of clay and the iron ores with small crystal size have relatively higher assimilation.By using the ore matching method introduced in this study,sinter ores with good sintering indexes and metallurgical properties can be obtained when low quality ores are used by the proportion of 50%,indicating the validity and superiority of the ore matching method according to complementary assimilation.