CN210193965U - Pyrometallurgical vacuum metallurgy composite reduction tank - Google Patents

Abstract

The utility model discloses a pyrometallurgical vacuum metallurgy composite reduction tank, which comprises a reduction tank body which is communicated up and down, wherein a high-temperature resistant outer sleeve is sleeved outside the reduction tank body, a high-temperature resistant inner lining is arranged inside the reduction tank body, and gaps are arranged between the high-temperature resistant outer sleeve and the outer surface of the reduction tank body and between the high-temperature resistant inner lining and the inner surface of the reduction tank body; a central ventilation cylinder is arranged in the reduction tank body, and the bottom of the central ventilation cylinder is supported on the inner wall of the reduction tank body; a space between the central ventilation cylinder and the high-temperature-resistant lining forms a metallurgical burden containing space, and a plurality of vent holes communicated with the metallurgical burden containing space are formed in the side wall of the central ventilation cylinder; the problems of chemical reaction erosion and the like of solid-phase furnace burden and metallurgical products and the wall of the reduction tank body can be effectively prevented, the service life of the reduction tank for pyrometallurgy of metal is prolonged, the smelting cost is reduced, the expected service life can reach more than one year, and the smelting cost is obviously reduced.

Description

Pyrometallurgical vacuum metallurgy composite reduction tank

Technical Field

The utility model belongs to the technical field of metal magnesium vacuum smelting, in particular to a pyrometallurgical vacuum metallurgy composite reduction tank.

Background

The external heating type silicothermic magnesium-smelting reduction tank works at the high temperature of 1200 ℃ and under the vacuum state of 10Pa absolute pressure, the external part of the external heating type silicothermic magnesium-smelting reduction tank is heated by high-temperature heat sources of flame and high-temperature smoke, the internal heating type silicothermic magnesium-smelting reduction tank is contacted with metallurgical furnace burden and reaction products thereof, and the operation environment is complex and severe. At present, high-temperature heat-resistant steel is generally adopted in the industry as a reduction tank body, and the service life is usually only about 3 months.

Chinese patent document CN2448849Y discloses a reduction tank suitable for magnesium smelting, chinese patent document CN201710093723 discloses a ceramic composite reduction tank, and chinese patent document CN201420233403 discloses a magnesium reduction tank, wherein silicon carbide or silicon nitride linings are respectively arranged in a high-temperature heat-resistant steel reduction tank body, and the service life of the magnesium smelting reduction tank is prolonged by a method of weakening the abrasion of furnace burden on the tank body and improving the pressure resistance of the tank body. However, the main reason for the short service life of the magnesium smelting reduction tank is not the abrasion in the tank and the bearing capacity of the tank, but the reduction of the tank wall and the reduction of the bearing capacity caused by the high-temperature oxidation and ablation of the flame and the high-temperature flue gas of the reduction furnace outside the reduction tank to the heat-resistant steel, so that the problem of short service life of the reduction tank cannot be effectively solved, and since CN00232193, the idea of arranging a lining in a metal reduction tank has been proposed, no reduction tank adopting the structure exists in the actual magnesium smelting industrial device for nearly two decades.

Further, chinese patent document CN2289800Y entitled a non-metal smelting reduction pot proposes a reduction pot shell configured, shaped, sintered and manufactured by alumina, aluminum oxide, carborundum, kaolin, etc., and a metal smelting reduction pot with a stainless steel cylinder lining inside the shell, but the configuration, shaping, sintering, manufacturing and assembling method with the stainless steel cylinder are not specific and have no technical feasibility, so the patent publication has no practical application so far.

Chinese patent document CN200720200214 discloses a silicon carbide reduction tank and chinese patent document CN201210382362 discloses a high temperature resistant silicon carbide reduction tank and a preparation method thereof, proposes to use silicon carbide material to replace the existing chromium-nickel heat resistant steel to manufacture the reduction tank, and chinese patent document CN201020151843 discloses a high temperature resistant non-metal vertical reduction tank) proposes that the vertical magnesium smelting reduction tank is made of refractory material. However, since both silicon carbide products and refractory materials have air permeability, and silicothermic magnesium smelting must be carried out under high vacuum (about 10Pa absolute pressure), and the air-permeable material used as a tank body cannot maintain vacuum at all, so that the silicon carbide and refractory materials cannot be applied to the magnesium smelting process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pyrometallurgical vacuum metallurgy composite reduction pot for solving the problems in the prior art; the technical scheme adopted for achieving the purpose is as follows:

a pyrometallurgical vacuum metallurgy composite reduction pot comprises a reduction pot body which is communicated up and down, wherein a high-temperature resistant outer sleeve is sleeved on the outer side of the reduction pot body, a high-temperature resistant lining is arranged on the inner side of the reduction pot body, and gaps are arranged between the high-temperature resistant outer sleeve and the outer surface of the reduction pot body and between the high-temperature resistant lining and the inner surface of the reduction pot body; a central ventilation cylinder is arranged in the reduction tank body, and the bottom of the central ventilation cylinder is supported on the inner wall of the reduction tank body; the space between the central ventilation cylinder and the high-temperature-resistant lining forms a metallurgical burden containing space, and a plurality of vent holes communicated with the metallurgical burden containing space are formed in the side wall of the central ventilation cylinder.

Preferably, the high-temperature-resistant outer sleeve and the high-temperature-resistant inner lining are made of high-temperature-resistant ceramic materials.

Preferably, the high-temperature-resistant outer sleeve and the high-temperature-resistant inner lining are made of corundum, silicon nitride or silicon carbide.

Preferably, an outer annular support for supporting the high-temperature-resistant outer sleeve is arranged on the outer surface of the reduction tank body, and an inner annular support for supporting the high-temperature-resistant inner lining is arranged in the reduction tank body.

Preferably, the radial distance between the central breather tube and the high temperature resistant lining is 20 mm to 300 mm.

Preferably, the clearance between the high-temperature-resistant outer sleeve and the outer surface of the reduction tank body and the clearance between the high-temperature-resistant lining and the inner surface of the reduction tank body are not less than 1 mm.

Preferably, the lower end part of the reduction tank body is a necking-type slag discharge end, and the lower end part of the central ventilation cylinder is supported on the inner wall of the necking-type slag discharge end.

The utility model discloses the beneficial effect who has does: the high-temperature resistant outer sleeve outside the reduction tank body ensures that the original tank body is not directly contacted with a high-temperature heat source in a smoke form, so that the problems of high-temperature oxidation, burning loss and the like of the original tank body can be effectively prevented, the solid-phase furnace burden is directly contacted with the high-temperature resistant lining and is not contacted with the inner wall of the reduction tank body, the problems of chemical reaction erosion and the like of the solid-phase furnace burden and a metallurgical product and the tank wall of the reduction tank body can be effectively prevented, the service life of the reduction tank for smelting metal by a pyrometallurgical method is prolonged, and; the service life of the composite reduction tank of the utility model is obviously prolonged compared with the reduction tank in the prior art, the estimated service life can reach more than one year, and the smelting cost is obviously reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a usage state diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, a pyrometallurgical vacuum metallurgical composite reduction tank comprises a reduction tank body 5 which is vertically communicated, a high-temperature-resistant outer sleeve 4 is arranged on the outer side of the reduction tank body 5, a high-temperature-resistant inner liner 6 is arranged on the inner side of the reduction tank body 5, gaps are respectively arranged between the high-temperature-resistant outer sleeve 4 and the outer surface of the reduction tank body 5 and between the high-temperature-resistant inner liner 6 and the inner surface of the reduction tank body 5, a central ventilation cylinder 8 is arranged in the reduction tank body 5, the bottom of the central ventilation cylinder 8 is supported on the inner wall of the reduction tank body 5, a metallurgical burden accommodating space is formed in the space between the central ventilation cylinder 8 and the high-temperature-resistant inner liner 6, a solid-phase burden 7 is accommodated in the metallurgical burden accommodating space during operation, and a plurality of vent holes 9 communicated with the.

The high-temperature-resistant outer sleeve 4 and the high-temperature-resistant lining 6 are made of high-temperature-resistant ceramic materials, preferably, the high-temperature-resistant outer sleeve 4 and the high-temperature-resistant lining 6 are made of corundum, silicon nitride or silicon carbide, and the high-temperature-resistant outer sleeve 4 and the high-temperature-resistant lining 6 can be made of one or two of corundum, silicon nitride and silicon carbide according to actual conditions.

An outer annular support 3 for supporting the high-temperature resistant outer sleeve 4 can be arranged on the outer surface of the reduction tank body 5, and an inner annular support 2 for supporting the high-temperature resistant lining 6 is arranged in the reduction tank body 5; meanwhile, the lower end part of the reduction tank body 5 is a necking-type slag discharge end 1 with the inner diameter sequentially reduced from top to bottom, and the lower end part of the central ventilation cylinder 8 is supported on the inner wall of the necking-type slag discharge end 1.

By combining the structural characteristics of the composite reduction tank and the attributes of metals to be smelted, the radial distance between the central breather pipe 8 and the high-temperature-resistant lining 6 can be adaptively set to be 20 mm to 300 mm through theoretical simulation calculation; meanwhile, in order to facilitate manufacturing and assembly, the clearance between the high-temperature-resistant outer sleeve 4 and the outer surface of the reduction tank body 5 and the clearance between the high-temperature-resistant lining 6 and the inner surface of the reduction tank body 5 are not less than 1 mm.

As shown in fig. 2, in the operation of the present invention, firstly, the lower end cover 17 is assembled at the necking type slag discharging end 1, the metal vapor cooling and condensing mechanism is assembled at the top of the reduction tank body 5, the metal vapor cooling and condensing mechanism includes the crystallization water jacket 10, the crystallization water jacket 10 is installed at the upper end of the reduction tank body 5 through the connecting flange or the connecting ring, the crystallizer 11 is installed at the corresponding position in the crystallization water jacket 10 at the upper end of the reduction tank body 5, wherein the crystallization water jacket 10 and the inner wall of the reduction tank body 5 can also be integrally formed; then solid phase furnace burden 7 for smelting metal is placed in a metallurgical material accommodating space, a sealing end cover 12 is arranged at the top of an upper end crystallization water jacket 10, the interior of a reduction tank body 5 is vacuumized through a vacuumizing port 13, under the action of high-temperature heat sources 16 such as flame, high-temperature flue gas or electric heating elements in a metallurgical reduction furnace, metal oxide in the solid phase furnace burden 6 generates metal steam 15 through chemical reaction to realize metallurgical reduction reaction, the metal steam upwards enters a crystallizer 11 through a vent hole 9 in a central ventilation cylinder 8, and metal crystals 14 are finally condensed on the inner wall of the crystallizer 11 under the action of the crystallization water jacket 10; after smelting is finished, the lower sealing end cover 1 is opened, the central ventilation cylinder 8 is lifted upwards or jacked up, and slag is discharged from the necking type slag discharging end 1.

In the pyrometallurgical process, the high temperature resistant overcoat 4 outside the reduction jar body 5 makes the former jar body 6 not direct contact high temperature heat source 16 of flue gas form, can effectively prevent the problem such as former jar body 5 high temperature oxidation and scaling loss, solid phase furnace burden 7 is direct to contact with high temperature resistant inside lining 6 and not to contact with the reduction jar body 5 inner wall, can effectively prevent the problem such as the chemical reaction of solid phase furnace burden 7 and metallurgical product and reduction jar body 5 jar wall, has prolonged the life of the reduction jar of pyrometallurgical metal, has reduced the cost of smelting.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments, but such modifications or substitutions do not depart from the spirit and scope of the present invention.

Claims (7)

1. A pyrometallurgical vacuum metallurgy composite reduction pot is characterized by comprising a reduction pot body which is communicated up and down, wherein a high-temperature resistant outer sleeve is sleeved on the outer side of the reduction pot body, a high-temperature resistant lining is arranged on the inner side of the reduction pot body, and gaps are arranged between the high-temperature resistant outer sleeve and the outer surface of the reduction pot body and between the high-temperature resistant lining and the inner surface of the reduction pot body; a central ventilation cylinder is arranged in the reduction tank body, and the bottom of the central ventilation cylinder is supported on the inner wall of the reduction tank body; the space between the central ventilation cylinder and the high-temperature-resistant lining forms a metallurgical burden containing space, and a plurality of vent holes communicated with the metallurgical burden containing space are formed in the side wall of the central ventilation cylinder.

2. The pyrometallurgical composite reduction tank according to claim 1, wherein the high temperature resistant outer jacket and the high temperature resistant inner lining are made of high temperature resistant ceramic materials.

3. The pyrometallurgical composite reduction tank according to claim 1, wherein the high temperature resistant outer jacket and the high temperature resistant inner lining are made of corundum, silicon nitride or silicon carbide.

4. The pyrometallurgical composite reduction tank according to any one of claims 1 to 3, wherein an outer annular support for supporting the high temperature resistant outer jacket is provided on an outer surface of the reduction tank body, and an inner annular support for supporting the high temperature resistant inner lining is provided in the reduction tank body.

5. The pyrometallurgical composite reduction tank in accordance with claim 4, wherein the radial distance between the central chimney and the refractory lining is 20 mm to 300 mm.

6. The pyrometallurgical composite reduction tank of claim 5, wherein the gap between the high temperature resistant outer jacket and the outer surface of the reduction tank body and the gap between the high temperature resistant inner lining and the inner surface of the reduction tank body are not less than 1 mm.

7. The pyrometallurgical composite reduction pot according to claim 6, wherein the lower end portion of the reduction pot body is a throat-type slag discharge end, and the lower end portion of the central funnel is supported on an inner wall of the throat-type slag discharge end.

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