Method for roasting vanadium pentoxide extracted by scherbinaite coal contained primary ore

Abstract

The invention relates to a method for roasting vanadium pentoxide extracted by scherbinaite coal contained primary ore. After being smashed to certain mesh degree, scherbinaite coal contained primary ore is sent into the main bed and the secondary bed of a fluidzed bed furnace; different blasting intensities when the main bed and the secondary bed roast are controlled, twice fluidization roasting is carried out to completely decarburize; after the decarburization material of the main bed and the secondary bed is added with barium salt, the mixture is roasted in a rotary kiln. The invention has the beneficial effects of short process flow, simple and easy operation, high yield and low production cost and can realize production automation control; vanadium has high immersion ratio which can be above 80%; and sulfuric acid consumption amount is low, only about 50 kg of sulfuric acid is consumed for each ton of cinder. The invention is the optimum path for comprehensively utilizing scherbinaite coal contained primary ore and can realize 'one ore three factories', i.e. a stone coal mine, a power station, a vanadium plant and a cement plant. The scherbinaite coal contained primary ore is in fluidized bed roasting to generate electricity; electricity is generated for the cinder to extract vanadium; the vanadium extracting tailings are high-quality filler of the cement plant to realize comprehensive utilization of resources, thus creating great economic benefit and social benefit.

Description

technical field

[0001] The invention relates to the metallurgical industry of rare nonferrous metals, in particular to a roasting method for extracting vanadium pentoxide from primary ore of vanadium-containing stone coal. Background technique

[0002] The roasting methods for extracting vanadium pentoxide from vanadium-containing stone coal currently include sodium, calcification, and barium salt ingredients into the open hearth furnace and shaft kiln roasting process / adding barium salt to the oxidized ore into the rotary kiln and rotary kiln roasting process.

[0003] However, because the primary ore of vanadium-containing stone coal contains 8-10% carbon, if it is directly roasted in a rotary kiln or a rotary kiln without decarbonization and adding additives (barium salt), the slag yield is extremely low, only 1 / 8 to 1 / 10 of the output of oxide ore, and the cost is high. At present, there are successful examples of vanadium-extracting industrial vanadium-bearing stone co...