CN102134165B - Furnace lining of ferrovanadium smelting furnace and preparation method thereof - Google Patents

Abstract

The invention provides a furnace lining of a ferrovanadium smelting furnace and a preparation method thereof. The preparation method comprises the step that the furnace lining is prepared by mixing magnesite, ferrovanadium slag, water glass and/or industrial brine, or is prepared by mixing the ferrovanadium slag, the water glass and/or the industrial brine. The furnace lining is high in structural strength, long in service life, large in density, good in air permeability, low in production cost and environment-friendly.

Description

Furnace lining of ferrovanadium smelting furnace and preparation method thereof

Technical field: the present invention relates to a kind of smelting equipment and preparation method thereof, particularly furnace lining of ferrovanadium smelting furnace and preparation method thereof.

Background technology: smelting furnace is topmost production unit in the metallurgical production process, basic furnace is a kind of widely used smelting furnace, the work-ing life of smelting furnace, the main work-ing life of depending on the smelting furnace furnace lining, furnace life, length depended on the length of lining life, and production cost is smelted in the impact of the life-span in furnace life, and generally only there are several stoves in the life-span of existing smelting furnace furnace lining to tens stoves, and the life-span of vanadium iron and high vanadium ferroalloy smelting furnace furnace lining is shorter.

Smelting in the smelting of high vanadium ferroalloy particularly at existing vanadium iron generally is the basic furnace of building furnace lining with magnesia brick by laying bricks or stones, the furnace lining loss that the magnesia brick piece is built by laying bricks or stones is large, it is long to build the tamped lining time by laying bricks or stones with magnesia brick piece list stove, bake process is slow, and the furnace lining production cost that pure magnesia brick is built by laying bricks or stones is high, and work-ing life, weak point generally only had several stoves to tens stoves.

Number be that it is with ferrovanadium dregs for 200810149181.9 " a kind of refractory castablies with the ferrovanadium dregs preparation " such as Chinese patent application, aluminium vanadine etc. is prepared refractory materials as major ingredient, it is only as the refractory materials of smelting furnace, as the furnace lining undercapacity of smelting furnace, and the many production costs of composition are high.

With the furnace lining of existing pure magnesia brick piece or refractory material laying, furnace lining structure intensity is not high simultaneously, and density and ventilation property etc. are Shortcomings all, and the furnace lining baking process is slow, and the weak point in work-ing life of furnace lining generally only has several stoves to tens stoves, so it is higher to smelt production cost; Also be difficult to simultaneously adapt to circulation continuity and the stability production of vanadium iron and high vanadium ferroalloy, cause the loss waste of vanadium metal and slag ash, vanadium metal can not get fully reclaiming and utilizing, and can not reclaim ferrovanadium slag, waste residue and use, the ferrovanadium slag that gives off, and stack open-air to environment.

Summary of the invention: the present invention will provide a kind of furnace lining of ferrovanadium smelting furnace and preparation method thereof exactly.Its life-span in furnace life is long, and furnace lining structure intensity is high, and furnace lining density is large, and the good permeability production cost is low, the environment-friendly type furnace lining.

Furnace lining of the present invention comprises that magnesia, ferrovanadium dregs and water glass and/or industrial bittern are mixed, also or ferrovanadium dregs and water glass and/or industrial bittern be mixed.

Described furnace lining is mixed by magnesia, ferrovanadium dregs and water glass and industrial bittern.

Magnesia of the present invention and ferrovanadium dregs mass ratio are 1:5-8.

Described magnesia is to mix the large, medium and small 50-60mm that is respectively of the granularity under the described magnesia physical condition, 30-40mm, 10-20mm with the ratio of the large, medium and small in mass ratio 1:2-3:3-4 of the granularity under the physical condition.

It is V in mass ratio that described ferrovanadium dregs chemical ingredients forms ₂O ₅3-4%, Al ₂O ₃60-65%, SiO ₂0.5-1%, CaO 14.5-15.5%, MgO 5-6%, C 0.1-0.25%, P 0.01-0.025%, S 0.005-0.008%.

Water glass of the present invention and industrial halogen quality are than being 2:1.

Water glass degree Beaume of the present invention is 30-38Be °, and industrial bittern is density 〉=1.3g/cm ³Calcium chloride solution.

Furnace lining of the present invention prepares as follows:

1) mass ratio of the large, medium and small granularity magnesia under the physical condition being pressed 1:2-3:3-4 mixes the rear compound that forms, again with ferrovanadium dregs mixed-shaped resulting mixture; Or ferrovanadium dregs is pressed the mass ratio mixed-shaped resulting mixture of 1:2-3:3-4 with the large, medium and small granularity under the physical condition;

2) to 1) add water glass and/or industrial bittern in the step mixture and fully mix and form the knotting furnace charge;

3) with 2) step knotting furnace charge places in furnace lining mould processed, makes firm by ramming with pneumatic hammer, and drying time 5-8h is controlled in the moulding of once tiing a knot oven dry, is take shape lining.

The technical solution of the present invention furnace lining is prepared furnace lining of ferrovanadium smelting furnace with magnesia and the mixing of vanadium slag, vanadium iron particularly, the smelting process of high vanadium ferroalloy is with magnesia and vanadium iron, the ferrovanadium dregs that high vanadium ferroalloy gives off after smelting and water glass and industrial bittern are the furnace lining of ferrovanadium smelting furnace that raw material is prepared, or the furnace lining of ferrovanadium smelting furnace of preparing as raw material take ferrovanadium dregs and water glass and industrial bittern, greatly prolong work-ing life, use 31 stoves that prove the furnace lining of being built by laying bricks or stones by the pure magnesia brick of original usefulness through our company, be increased to 92 stoves, be up to 102 stoves, increased substantially the work-ing life of furnace lining; Use 31 stoves with former furnace lining, the furnace lining of ferrovanadium smelting furnace that the present invention builds by laying bricks or stones uses 102 furnace gauges to calculate, be 3.29 times of former furnace lining work-ing life its work-ing life, need 634 on magnesia brick whenever to build a furnace lining by laying bricks or stones, about every heavy 4.5kg, in 1907 yuan/tons of magnesia brick prices currents, so the expense of building by laying bricks or stones once is 634 * 0.0045 * 1907=5440.9 unit, the present invention is existing 3.29 times, so and the present invention only uses a small amount of magnesia or only use the vanadium iron smelted furnace cinder to use furnace lining of the present invention to use existing furnace lining 3.29 * 5440.9=17900 unit that saves production cost approximately.

Used simultaneously vanadium iron to smelt the production cost that the slag of discharging when producing has been saved again furnace lining, made the smelted furnace cinder waste reclaimation, the rate of recovery that increased substantially vanadium metal has outwards reduced and has discharged pollutants, and has reduced environmental pollution.

Embodiment:

Embodiment 1

Ferrovanadium dregs and magnesia are pulverized respectively, and magnesia powder is broken to large, medium and small three kinds of globule sizes under physical condition, and pile respectively, control magnesia particle size diameter are greatly: 60mm, in: 35mm is little: 20mm; And the big or small magnesia diameter with small grain size of the particle size diameter of ferrovanadium dregs is controlled at 20mm mutually at once; With the in mass ratio ratio mixing of 1:2:3 of large, medium and small three kinds of granularity magnesia, form the magnesia compound first, form mixture after the 1:6 ratio is mixed in mass ratio with above-mentioned ferrovanadium dregs with the magnesia compound again, it is V in mass ratio that the ferrovanadium dregs chemical ingredients forms ₂O ₅3.45%, Al ₂O ₃64.7%, SiO ₂0.75%, CaO 15%, and MgO 5.9%, and C 0.22%, and P 0.02%, and S 0.006%, adds in mass ratio that water glass and the industrial halogen aqueous solution are 2:1 in the described mixture again, 37Be ° of control water glass degree Beaume, and industrial bittern is density 1.35g/cm ³Calcium chloride solution, form the knotting furnace charge after fully mixing, described knotting furnace charge is placed carries out artificial pneumatic hammer in the furnace lining mould and make compacting firm by ramming, the heat oven dry is given in the moulding of once tiing a knot again, control drying time 5-8h is the smelting furnace furnace lining; Use proof to adopt furnace lining that the inventive method makes with magnesia and ferrovanadium dregs production than the furnace lining of prior art with pure magnesia brick and the preparation of other refractory materials through practice, improved 3-4 work-ing life doubly, the useless ferrovanadium dregs of producing in the vanadium iron smelting process, obtain recycling, reduced production cost.

Embodiment 2

Be prepared furnace lining with ferrovanadium dregs and water glass and industrial bittern; Remaining is identical with embodiment 1 except following explaining the situation

Ferrovanadium dregs is crushed to large, medium and small three kinds of globule sizes under physical condition, and pile respectively, control ferrovanadium dregs particle size diameter are greatly: 50mm, in: 30mm is little: 20mm; First with the in mass ratio ratio mixing of 1:2:3 of large, medium and small three kinds of granularity ferrovanadium dregs, form the ferrovanadium dregs compound, add again in mass ratio that water glass and the industrial halogen aqueous solution are 2:1 in the described ferrovanadium dregs mixture, 37Be ° of control water glass degree Beaume, industrial bittern is density 1.35g/cm ³Calcium chloride solution, form the knotting furnace charge after fully mixing, prepare again vanadium iron and smelt furnace lining.

Embodiment 3

Use raw material as magnesia, ferrovanadium dregs and water glass other and embodiment 1 with.

Claims (5)

1. furnace lining of ferrovanadium smelting furnace, it is characterized in that described furnace lining comprises that magnesia, ferrovanadium dregs and water glass and/or industrial bittern are mixed, the mass ratio of described magnesia and ferrovanadium dregs is 1:5-8, magnesia is large, medium and small with the granularity under the physical condition, the ratio of 1:2-3:3-4 is mixed in mass ratio, the large, medium and small 50-60mm that is respectively of described granularity, 30-40mm, 10-20mm;

Or described furnace lining comprises that ferrovanadium dregs and water glass and/or industrial bittern are mixed, and controls particle size diameter under the described ferrovanadium dregs physical condition greatly: 50mm, in: 30mm is little: 20mm; The mass ratio that the control ferrovanadium dregs is pressed 1:2-3:3-4 with the large, medium and small granularity under the physical condition mixes.

2. according to furnace lining of ferrovanadium smelting furnace claimed in claim 1, it is characterized in that described furnace lining is mixed by magnesia, ferrovanadium dregs and water glass and industrial bittern.

3. according to furnace lining of ferrovanadium smelting furnace claimed in claim 2, it is characterized in that water glass and industrial halogen quality than being 2:1.

4. according to claim 1 or 2 described furnace lining of ferrovanadium smelting furnaces, it is characterized in that described water glass degree Beaume is 30-38 ° of B é, industrial bittern is density 〉=1.3g/cm ³Calcium chloride solution.

5. the preparation method of a furnace lining of ferrovanadium smelting furnace is characterized in that preparing as follows:

1) mass ratio of the large, medium and small granularity magnesia under the physical condition being pressed 1:2-3:3-4 mixes the rear compound that forms, again with ferrovanadium dregs mixed-shaped resulting mixture, control the large, medium and small 50-60mm of being respectively of granularity under the described magnesia physical condition, 30-40mm, 10-20mm;

Or ferrovanadium dregs pressed the mass ratio mixed-shaped resulting mixture of 1:2-3:3-4 with the large, medium and small granularity under the physical condition, and the particle size diameter of controlling under the described ferrovanadium dregs physical condition is large, medium and small, is respectively large: 50mm, in: 30mm is little: 20mm;

2) to 1) add water glass and/or industrial bittern in the step mixture and fully mix and form the knotting furnace charge;

3) with 2) step knotting furnace charge places in the furnace lining mould, makes firm by ramming with pneumatic hammer, the moulding of once tiing a knot oven dry, control drying time 5-8h is take shape lining.