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金属矿山 ›› 2009, Vol. 39 ›› Issue (02): 71-74.

• 矿物工程 • 上一篇    下一篇

焙烧对含菱磷铝锶矾高磷铁矿石酸浸除磷的影响

章少华,刘青,谢冰   

  1. 南昌大学
  • 出版日期:2009-02-16 发布日期:2012-02-02

Influence of Roasting on the Dephosphorization of Svanbergite  High-Phosphorus Iron Ore by Acid Leaching

Zhang Shaohua,Liu Qing,Xie Bing   

  1. Nanchang University
  • Online:2009-02-16 Published:2012-02-02

摘要: 以河南某地含菱磷铝锶矾高磷铁矿石为对象,研究了焙烧对含菱磷铝锶矾高磷铁矿石酸浸法除磷的影响及机理。结果表明:焙烧对含菱磷铝锶矾铁矿石的酸浸除磷至关重要。难溶于酸的菱磷铝锶矾在加热到500~700 ℃时会逐渐分解成易溶于酸的六方AlPO4,使酸浸除磷效果大大提高;但焙烧温度在1 025 ℃以上时,由于AlPO4从六方型转变成较难溶于酸的立方型,导致除磷效果下降。对于试验矿样,最佳的焙烧温度为800 ℃,保温时间为1 h。

关键词: 含菱磷铝锶矾高磷铁矿石, 焙烧, 酸浸除磷

Abstract: The influence of roasting on the acid leaching-dephosphorization of svanbergite high phosphorous iron ore represented by that from Henan and its mechanism are studied.The result shows that roasting is of great importance to the acid leaching-dephosphorization of this kind of ore.The hard acid-soluble svanbergite will gradually decompose into hexagonal AlPO4 which is acid-soluble at a roasting temperature of 500~700 ℃, thus greatly improving the dephosphorization effect of acid leaching.However, when the roasting temperature rises to over 1 025 ℃, the AlPO4 crystals will change from hexagonal to cristobalite that is hard to solve in acid, leading to the decrease of dephosphorization.For this test sample, it is best to have a roasting temperature of 800 ℃, which is kept for one hour.

Key words: Svanbergite high phosphorous iron ore, Roasting, Dephosphorization by acid leaching