CN106435222A - Smelting method for silicon aluminium reduction vanadium iron - Google Patents

Abstract

The invention discloses a smelting method for silicon aluminium reduction vanadium iron. The smelting method comprises the following steps: a, adding cold state vanadium-rich slag and lime into an electric arc furnace for bedding, adding a first-phase mixture for smelting, then returning hot state vanadium-rich slag of a last furnace into the electric arc furnace, and discharging the slag when the content of vanadium in smelting slag is less than 0.5 percent; b, adding a second-phase mixture for smelting, discharging the slag when the content of the vanadium in the smelting slag is less than 0.5 percent, and adding aluminium or an aluminium magnesium alloy to perform reducing treatment before the slag is discharged; and c, adding a refining mixture for smelting, discharging vanadium iron alloy liquid and vanadium-rich slag when the content of vanadium in the vanadium iron alloy liquid is 78 to 82 percent and the aluminium content is less than 1.5 percent, pouring the vanadium iron alloy liquid to an ingot mould which is preheated to above 500 DEG C, cooling, de-moulding and crushing to obtain high-vanadium iron with the vanadium content of over 80 percent. According to the smelting method, multi-furnace continuous smelting can be realized through special process control; and the purposes of reducing vanadium residue in the slag and improving the vanadium iron smelting recovery rate are achieved.

Description

A kind of sial reduces the smelting process of vanadium iron

Technical field

The invention belongs to vanadium iron technical field of smelting is and in particular to a kind of sial reduces the smelting process of vanadium iron.

Background technology

High vanadium ferroalloy refers to the vanadium iron in more than 80wt% for the content of vanadium.Straight tube stove is smelted high vanadium ferroalloy and is used a step smelting The technique of refining vanadium iron, often smelting a stove needs to change the combination type straight tube body of heater once tying, and body of heater is prepared offline, smelts The vanadium iron liquid of gained separates with slag offline furnace cooling natural subsidence, and 3 tons about of single furnace output, if expanded further Heat size, it will make vanadium iron segregation serious it is impossible to effective control for product quality；Meanwhile, the residual vanadium in slag is higher, and vanadium iron is smelted back Yield is low.

Content of the invention

It is necessary to propose the smelting process that a kind of sial reduces vanadium iron.

A kind of sial reduces the smelting process of vanadium iron, comprises the following steps：

A, by cold conditions contain vanadium richness slag and Calx add electric arc furnace rebasing, add by vanadic anhydride, aluminum shot, Calx, steel cuttings group The phase compound becoming is smelted, and returns the vanadium in electric arc furnace, in metallurgical slag with the hot richness slag containing vanadium that will go up a stove Content is slagged tap when being less than 0.5%, and wherein, the described hot richness slag containing vanadium being back in electric arc furnace achieves the mesh of striking igniting 's；

B, addition are smelted by the second stage of compound that Vanadium sesquioxide, aluminum shot, Calx, steel cuttings form, the vanadium in metallurgical slag Content is slagged tap when being less than 0.5%, and adds aluminum or almag to carry out reduction treatment before slagging tap；

C, add by vanadic anhydride and Calx or the refine compound that is made up of iron scale and Calx is smelted, vanadium in control stove The temperature of ferroalloy liquid is more than 1900 DEG C, and the content of vanadium in vanadium iron liquid is 78～82% and aluminium content is less than Go out vanadium iron liquid when 1.5% and containing vanadium richness slag, vanadium iron liquid is poured in the ingot mould that preheating reaches more than 500 DEG C, cooling, The demoulding, broken after obtain high vanadium ferroalloy more than 80% for the content of vanadium.

The present invention controls achievable many stoves melting continuously by special process, reduces residual vanadium in slag, improves vanadium iron smelting The purpose of the refining response rate.

Specific embodiment

Embodiments provide the smelting process that a kind of sial reduces vanadium iron, comprise the following steps：

A, by cold conditions contain vanadium richness slag and Calx add electric arc furnace rebasing, add by vanadic anhydride, aluminum shot, Calx, steel cuttings group The phase compound becoming is smelted, and returns the vanadium in electric arc furnace, in metallurgical slag with the hot richness slag containing vanadium that will go up a stove Content is slagged tap when being less than 0.5%, and wherein, the described hot richness slag containing vanadium being back in electric arc furnace achieves the mesh of striking igniting 's；

B, addition are smelted by the second stage of compound that Vanadium sesquioxide, aluminum shot, Calx, steel cuttings form, the vanadium in metallurgical slag Content is slagged tap when being less than 0.5%, and adds aluminum or almag to carry out reduction treatment before slagging tap；

C, add by vanadic anhydride and Calx or the refine compound that is made up of iron scale and Calx is smelted, vanadium in control stove The temperature of ferroalloy liquid is more than 1900 DEG C, and the content of vanadium in vanadium iron liquid is 78～82% and aluminium content is less than Go out vanadium iron liquid when 1.5% and containing vanadium richness slag, vanadium iron liquid is poured in the ingot mould that preheating reaches more than 500 DEG C, cooling, The demoulding, broken after obtain high vanadium ferroalloy more than 80% for the content of vanadium.

Step in present invention method can carry out order according to actual needs and adjust, merges and delete.

Module in embodiment of the present invention device or unit can merge according to actual needs, divide and delete.

Above disclosed be only present pre-ferred embodiments, certainly the right model of the present invention can not be limited with this Enclose, one of ordinary skill in the art will appreciate that realizing all or part of flow process of above-described embodiment, and will according to right of the present invention Seek made equivalent variations, still fall within the scope that invention is covered.

Claims (1)

1. a kind of sial reduces the smelting process of vanadium iron it is characterised in that comprising the following steps：

A, by cold conditions contain vanadium richness slag and Calx add electric arc furnace rebasing, add by vanadic anhydride, aluminum shot, Calx, steel cuttings group The phase compound becoming is smelted, and returns the vanadium in electric arc furnace, in metallurgical slag with the hot richness slag containing vanadium that will go up a stove Content is slagged tap when being less than 0.5%, and wherein, the described hot richness slag containing vanadium being back in electric arc furnace achieves the mesh of striking igniting 's；

B, addition are smelted by the second stage of compound that Vanadium sesquioxide, aluminum shot, Calx, steel cuttings form, the vanadium in metallurgical slag Content is slagged tap when being less than 0.5%, and adds aluminum or almag to carry out reduction treatment before slagging tap；

C, add by vanadic anhydride and Calx or the refine compound that is made up of iron scale and Calx is smelted, vanadium in control stove The temperature of ferroalloy liquid is more than 1900 DEG C, and the content of vanadium in vanadium iron liquid is 78～82% and aluminium content is less than Go out vanadium iron liquid when 1.5% and containing vanadium richness slag, vanadium iron liquid is poured in the ingot mould that preheating reaches more than 500 DEG C, cooling, The demoulding, broken after obtain high vanadium ferroalloy more than 80% for the content of vanadium.