Stone-like coal gas phase vanadium extracting method

Abstract

A method to extract vanadium with stone coal gas phase, the technology steps are as following: the stone coal or the stone material prepared with the ore containing alum will be broke, and milled to produce the powder, the size of which is 60-80 eyes, the powder will be delivered into the furnace in fluid bed to degrade at high temperature and be aerified by burning. They will be burned for 8-30 seconds at 900-1250deg.C, and at the same time, will be oxygen aerified by inputting air containing 30-50% oxygen, the vanadic oxide in the material will become burner gas. The burner gas enters the deposition room, and it will be cooled to 500deg.C by heat exchanger, and will be flushed of f by two-stage whirlwind according to dry method. The burner gas after deslagging will enter the electrostatic dust catcher from the deposition room to enrich. The enriched material will be dipped by alkali solution and dipping solution containing alum can be gained. The remained burned gas will enter the two-stage apray tower to make the vanadic oxide in gas phase become spray solution containing vanadic. Vitriol will be added into the two solution containing alum, the raw vanadic oxide will be deposit out by neutralized with acid. This patent can widely take advantage of the stone coal resource with low caloric value and low grade, the reclaim rate is high, and it can save energy, it does not need flux and the cost of it is low, the exhaust of the three wastes, and it is helpful to protect environment.

Description

technical field [0001] The invention relates to a method for extracting vanadium pentoxide from stone coal. Background technique [0002] Vanadium (V) is V in the periodic table of elements B Group elements, antimony (Sb) belongs to V A Elements have similar chemical and physical properties. The melting point of vanadium pentoxide is 658°C, and the melting point of antimony trioxide is 655°C. Pyrochemical antimony smelting almost always adopts the method of vapor phase antimony precipitation. Antimony is about 5×10 in the earth's crust -5 %, while vanadium amounts to 1.5 x 10 -2 %, much richer than antimony, but very scattered, and it is difficult to find vanadium-rich ore with >1% content. Vanadium is mostly found in associated titanium magnetite, magnetite, bauxite, uranium ore, phosphate rock and other deposits. Among the vanadium-titanium magnetite deposits in my country, there are several places such as Panxi in Sichuan, Chengde in Hebei, and Ma'anshan in Anhui....

AI Technical Summary

Problems solved by technology

There are several major shortcomings in this production process: one, the amount of auxiliary materials (solvent salt, alkali) is large, and the consumption per ton of product is nearly 20 tons; two, the heat energy of carbon is not well utilized, wasting energy; three, the environmental pollution is serious, Chlorine, sulfur in the gas phase, slag, and alkali salt in the liquid are difficult to remove, resulting in the destruction of forest crops and endangering the health of humans and animals

Four, can not use low grade (V 2 o 5 content < 0.5% ore); and, due to the long process flow and many equipments, resulting in large investment and high cost, small factories are unable to do a good job in environmental protection, and factories launched by local methods are even more smoky

Domestically, scientific and technological personnel were organized to tackle key problems, but they have not yet found a production process with small investment, low cost, good treatment of three wastes, and low-grade ore.