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A lPO4,使酸浸除磷效果大大提高;但焙烧温度在1 025℃以上时,由于A lPO4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。
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 AIPO4 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 AIPO4 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.
出处
《金属矿山》
CAS
北大核心
2009年第2期71-74,共4页
Metal Mine
关键词
含菱磷铝锶矾高磷铁矿石
焙烧
酸浸除磷
Svanbergite high phosphorous iron ore, Roasting, Dephosphorization by acid leaching
