【摘要】 研究了用硫铁矿烧渣为原料,制取超细氧化铁红的新工艺。原料配加硫酸,采用熟化法酸浸,先制得硫酸亚铁,铁的浸出率达97%以上;用液相氧化法制晶种,添加独特的均相催化剂,制得长120nm,径30nm氧化铁红的棒状粒子。为防止二次团聚,用硬脂酸等表面活性剂进行改性,提高其亲油化度。该工艺简便可行,制备出理想的超细氧化铁红,且技术设备要求不高。更多还原

【Abstract】 The new technology for the preparation of superfine ferric oxide from pyrite cinder is studied.The FeSO₄ is first prepared by H₂SO₄ leaching method,the leaching rate of Fe is 97%.Then the rod particle-superfine ferric oxide with （120 nm） length and 30 nm diameter is prepared in the liquid homogeneous catalytic oxidation system,in which the crystal seed is prepared by liquid phase oxidation and the unique homogeneous catalyst is added.In order to avoid secondary aggregation of the particle,the product is modified with stearate to increase its lipophilic degree.This process is simple and practical,and the equipment adopted is not complex.更多还原