A kind of vanadium extraction process of stone coal vanadium ore

Abstract

The invention discloses a vanadium extracting process of stone coal vanadium ore. Vanadium pentoxide products are extracted through the process of decarburization oxidizing roasting-alkaline leaching-ion exchange-ammonium salt vanadium precipitation. Blank roasting is beneficial for converting low-valent vanadium in stone coal into high-valent vanadium, and the leaching rate of vanadium is increased. Meanwhile, carbon burning in the stone coal is enough to maintain the roasting process in a self-heating mode, and redundant heat can be used for generating electricity. Leaching residues of roasted stone coal ore are good raw materials for manufacturing cement, and resources are fully used by treating the stone coal ore in this way. By the adoption of alkaline leaching, the operation environment is good, equipment is not corroded, and the leaching rate of vanadium is increased. An ion exchange method is introduced into wet extraction metallurgy of vanadium, thus, vanadium-containing liquid with low concentration can be highly enriched, vanadium can be quite effectively separated from iron, aluminum and other metal impurities, and high-quality refined vanadium can be manufactured.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a vanadium extraction process from stone coal vanadium ore. Background technique [0002] With the consumption of industrial development, high-grade and easy-to-handle mineral resources are becoming less and less, so low-grade and difficult-to-handle mineral resources have gradually attracted people's attention. my country's unique stone coal resources, although the vanadium-containing grade is low and most of them are refractory ores, but the total amount of vanadium is huge. As early as the 1970s, many stone coal vanadium extraction plants appeared in my country, but most of them adopted the sodium roasting process. The recovery rate of vanadium was low and the environmental pollution was particularly serious, and they were closed one after another. Therefore, according to the characteristics of my country's stone coal resources, it is of great significance to improve smelting...

AI Technical Summary

Problems solved by technology

As early as the 1970s, there were many stone coal vanadium extraction plants in my country, but most of them used sodium roasting process. The recovery rate of vanadium was low and the environmental pollution was particularly serious, and they were closed down one after another.