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在木质生物质燃烧灰中形成黄金

Truong Dinh¹, Helga Kovács¹, Zsolt Dobó¹

¹Institute of Energy, Ceramics and Polymer Technology, University of Miskolc, 3515, Miskolc, Hungary.

|July 4, 2024

概括

这项研究表明,如何利用燃烧和浸从木质生物质灰中回收黄金. 灰中的黄金度显著增加,使得从二次资源中回收有价值的金属成为可能.

科学领域:

环境科学与工程环境科学与工程
材料科学材料科学材料科学
金工业是金工业的一个方面.

背景情况:

木质生物质可以含有贵金属,包括黄金,来源于它生长的土壤.
废弃的采矿区是生物质的潜在来源,含有高度的贵金属.
生物质的燃烧将这些金属集中到灰中,创造一个二次资源.

研究的目的:

研究来自木质生物质燃烧的灰中的黄金缩.
探索从生物质灰中回收黄金的浸出技术的有效性.
了解燃烧产生的灰中的黄金形成和形态学.

主要方法:

从一个棕色矿场采矿场的颗粒状木质生物质的试点规模固定炉燃烧.
使用分析技术对黄金含量进行灰灰表征.
三阶段的浸工艺 (水,酸,) 用于从底部和沉积灰中提取黄金.
扫描电子显微镜 (SEM) 用于金颗粒形态分析.

主要成果:

黄金度从燃料中的<0.05 mg/kg增加到不同的灰分数中的1.52-3.52 mg/kg (底部,换热器,沉积,飞灰).
飞显示黄金度最高 (3.52毫克/公斤),其次是沉积灰,换热器灰和底层灰.
炼致富黄金含量为12.1 mg/kg的底层灰残留物和12.6 mg/kg的沉积灰残留物.
在底部和热交换器灰中,SEM揭示了纯金颗粒 (>98%的纯度,大小为1-2微米);飞灰中的黄金与K,Na,S,O有关.

结论:

燃烧和随后的浸有效地从木质生物质灰中丰富和回收黄金.
生物质灰是黄金回收的可行的二次资源.
了解黄金在燃烧过程中的行为有助于优化回收过程.

关键词:

灰灰灰灰灰灰灰灰灰灰灰生物质是生物质中的一部分.燃烧方式燃烧方式黄金黄金黄金黄金泄漏泄漏是一种泄漏.

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