针对湿法冶金浸出液除铁方法存在的缺点进行了研究,通过调节p H值、温度、加入双氧水的速度,研究了类针铁矿沉淀结晶的最佳条件,并在此基础上,研究了褐铁矿晶种对类针铁矿沉淀结晶的影响。结果表明,在80~85℃,p H=2.4~2.8时,以8 m L/h...针对湿法冶金浸出液除铁方法存在的缺点进行了研究,通过调节p H值、温度、加入双氧水的速度,研究了类针铁矿沉淀结晶的最佳条件,并在此基础上,研究了褐铁矿晶种对类针铁矿沉淀结晶的影响。结果表明,在80~85℃,p H=2.4~2.8时,以8 m L/h的速度缓慢加入30%的双氧水,除铁效果较好;褐铁矿晶种的加入有利于类针铁矿在其表面二次成核,形成大颗粒包裹体。展开更多
The morphologies of goethites in latosol, red soils, yellow-brown soil and the paddy soils developed from red soils were studied in comparison with the morphology of synthetic goethite by means of the X-ray distractio...The morphologies of goethites in latosol, red soils, yellow-brown soil and the paddy soils developed from red soils were studied in comparison with the morphology of synthetic goethite by means of the X-ray distraction, transmission electron microscopy and energy dispersive X-ray analysis. The synthetic goethite displayed acicular particles elongated in the c-direction. The goethites in the latosol, red soils and yellowbrown soil were platy particles stretched in two directions or isodimensional particles, and those in the paddy soils from red soils were acicular, short columnar, platy or isodimensional particles. Various morphologies of the goethites probably suggested their different dominant crystal faces, surface charge distribution and surface adsorption characteristics.展开更多
文摘针对湿法冶金浸出液除铁方法存在的缺点进行了研究,通过调节p H值、温度、加入双氧水的速度,研究了类针铁矿沉淀结晶的最佳条件,并在此基础上,研究了褐铁矿晶种对类针铁矿沉淀结晶的影响。结果表明,在80~85℃,p H=2.4~2.8时,以8 m L/h的速度缓慢加入30%的双氧水,除铁效果较好;褐铁矿晶种的加入有利于类针铁矿在其表面二次成核,形成大颗粒包裹体。
文摘The morphologies of goethites in latosol, red soils, yellow-brown soil and the paddy soils developed from red soils were studied in comparison with the morphology of synthetic goethite by means of the X-ray distraction, transmission electron microscopy and energy dispersive X-ray analysis. The synthetic goethite displayed acicular particles elongated in the c-direction. The goethites in the latosol, red soils and yellowbrown soil were platy particles stretched in two directions or isodimensional particles, and those in the paddy soils from red soils were acicular, short columnar, platy or isodimensional particles. Various morphologies of the goethites probably suggested their different dominant crystal faces, surface charge distribution and surface adsorption characteristics.
