Influence Of Iron Oxide Additions On High Tempreature Performance Of Resin Sand

Adding iron oxide to the resin sand,and study the influence of iron oxide additions on the high temperature property of resin sand systematically,which has a great academic and application value.This research uses three different iron oxide ores which are appied to iron-making industry as the raw material,and use the ZGY resin sand high temperature property tester which is developped by our research group, then adding different kinds,different addtion amount and different granularty of iron oxide to the phenolic urethane amine cold box resin sand and no-bake furan resin sand, study the influence of iron oxide on the high temperature property of resin sand. After that,do the SEM observation and XRD mineralogical phase analysis,explain the mecahnism of how iron oxide addition affect the resin sand high temperature property preliminarily.The main conclusions of this paper are as follows:(1) compare with the test sample which has no iron oxide addition,adding Hematite and Gas ash concentrate,reduce the high tempreature compression strength of the phenolic urethane amine cold box resin sand,with the increase of the adding amount,the high temperature compression strenght decreases gradually.the smaller the hematite and gas ash concentrate are,the lower the high temperature compression strength is.Adding magnetite can increase the high temperature compression strength of the phenolic urethane amine cold box resin sand,with the increase of the adding amount, the high temperature compession strength increases first and then decreases,when the adding amount is 1.5%,it has the biggest high temperature compression strength;the finer the magnetite is, the higher the high temperature compression strength of the resin sand sample is.(2) compare with the test sample which has no iron oxide addition,adding hematite magnitite,improve the conditional thermal stability of the phenolic urethane amine cold box resin sand,but adding gas ash concentrate reduce the conditional thermal stability of the phenolic urethane amine cold box resin sand.Adding hematite and gas ash concentrate,with the increase of the adding amount, the conditional thermal stablity of the phenolic urethane amine cold box resin sand decreases gradually,adding magnetite,with the increase of the adding amount, the conditional thermal stability of the phenolic urethane amine cold box resin sand increases first and then decreases,the finer the three kinds of additions are,the bigger the conditional thermal stability value of the phenolic urethane amine cold box resin sand is(3) adding hematite,magnetite and gas ash concentrate,the confined thermal expansion force of the phenolic urethane amine cold box resin sand all decrease,with the increase of the adding amount,the confined thermal expansion force decrease gradually,the finer the addition is,the bigger the confined thermal expansion force is.(4)after adding the addition,the changing rules of the high tempreature compression strength, the conditional thermal stability and the confined thermal expansion force of the no-bake furan resin sand are similar to the phenolic urethane amine cold box resin sand.adding nothing, the high tempreature compression strength and confined thermal expansion force value of the no-bake furan resin sand is greater than the phenolic urethane amine cold box resin sand,but the confined thermal expansion force value of the no-bake furan resin sand is lower the phenolic urethane amine cold box resin sand.