福建龙岩中甲铁矿床中铟、镉赋存状态及其综合回收经济评价

福建龙岩中甲铁矿是上世纪60年代探明的海相火山沉积-热液叠加改造型多金属硫化物磁铁矿矿床。随着该矿难选铁矿石选矿技术的突破,最近发现矿石中共(伴)生的分散元素铟、镉含量超过综合利用工业最低品位要求,铟、镉的储量估算均可达大型规模。通过研究铟、镉的赋存状态,认为矿石中尚无铟、镉的独立矿物存在,铟、镉主要与锌呈类质同象存在于闪锌矿的晶格中;铟、镉综合回收经济评价表明,铟、镉在选矿流程中主要走向锌精矿,可在锌的冶炼过程中综合回收,并会获得很好的经济效益。永安—梅县凹陷带内有众多与该矿床类似的铁多金属矿,该矿床共(伴)生铟、镉含量及赋存状态的考察,对区域同类矿床伴生元素的综合利用、提升经济价值有重大意义。

The occurrence and comprehensive recovery assessment of In and Cd in the Zhongjia iron deposit, Fujian

Zhongjia iron deposit is a marine volcanic sedimentary-hydrothermally reworked polymetallic sulfide-magnetite ore deposit discovered in the last 60th. With breakthrough of beneficiation technology contents of indium and cadmium of the by-products is identified above the required minimum industrial grade and calculation shows that reserve of indium and cadmium is of a large ore deposit. The by-products occur as isomorph in lattice of sphalerite and not in independent minerals. It is assessed during comprehensive recovery that the by-products are mainly flowed to the Zn concentrate and in metallurgical process of Zn they can be comprehensively recovered with excellent economic result. In Yong''an-Meixian depression occur many similar Fe-poly-metallic ore deposits. Occurrence of indium and cadmium in Zhongjia iron deposit would supply evidence for comprehensive recovery of the by-products and raise economic value of so many iron deposits.