【摘要】 试验说明,在菱镁矿烧结过程中,少量杂质铁的存在对烧结有一定促进作用。铁若以固溶体形式存在,效果尤为突出。对比了掖县与海城高纯菱镁矿的烧结温度,当体积密度达到3.1g/cm~3时,后者的烧结温度比前者约高300℃;合成镁白云石的体积密度达3.3g/cm~3时,烧结温度高200℃左右。掖县菱镁矿铁含量较海城的几乎高一倍,且多以固溶体形式存在,这是其易烧结的重要原因之一。现就其浮选与烧结过程中有关杂质铁的存在形式、变化与作用加以讨论。更多还原

【Abstract】 It has been shown by tests that the existence of a small amount of iron impurity improves the sintering of magnesite. If iron exists in the form of solid solution, the effect is better. Comparing the sintering temperature of Ye County magnesite with that of Haicheng magnesite, the latter is 300℃ higher than the former, when a bulk density of 3.1g/cm~3 is obtained; comparing the magnesodolomites of two regions, the latter is 200℃ higher than the former, when a bulk density of 3.3g/cm~3 is obtained. One of the important reasons for this phenomenon is that the iron content of Ye County magnesite is not only as twice as that of Haieheng magnesite, but also exists in the form of solid solution.The existence form, the change and the action of iron impurity in the processes of flotation and sintering are then discussed in this paper.更多还原