CN102168185A

CN102168185A - Vertical reduction furnace

Info

Publication number: CN102168185A
Application number: CN 201110067000
Authority: CN
Inventors: 梁小军
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-20
Filing date: 2011-03-20
Publication date: 2011-08-31

Abstract

The invention relates to a smelting furnace, in particular to a vertical reduction furnace for smelting volatile metal. The reduction furnace comprises a reduction tank which is vertically arranged in a heating furnace, a metal crystallizer arranged at the upper part of the reduction tank and a discharging device arranged at the lower end of the reduction tank. The reduction furnace is characterized in that: a cylindrical auxiliary tank which is concentric with the reduction tank is arranged in the reduction tank, the wall of the cylindrical auxiliary tank has holes, and the upper end of the cylindrical auxiliary tank is fixedly connected with a handle, the lower end of the reduction tank extends out from the furnace bottom of the heating furnace, the bottom of the reduction tank is an inverted cone which is provided with a discharge hole, and the lower end of the cylindrical auxiliary tank is arranged at the discharge hole of the inverted cone. The auxiliary tank which is cylindrical and of which the wall is provided with the holes is arranged in the reduction tank, so that the resistance that reduced metal steam enters the crystallizer is reduced, and the yield of the reduction process is improved. The bottom of the reduction tank is conical, so that the structure of the discharge hole is simple and the sealing effect of the reduction tank and a furnace body is improved, the maintenance cost is saved, and the loss of hot air in the heating furnace is reduced.

Description

Vertical reducing furnace

Technical field

The present invention relates to a kind of smelting furnace, particularly a kind ofly be used for the vertical reducing furnace that volatile Metal smelting is used.

Background technology

The smelting process of domestic volatile metal mainly is to adopt the skin river to produce at present, and take magnesium metal as example, it is to utilize Pidgeon process to smelt that the magnesium metal more than 60% is arranged.This method mainly is to adopt hot reducing method production, and it is the reduction jar to be lain in a horizontal plane in the process furnace heat, and under vacuum condition the raw material in the reduction jar is reduced.Because reduction tank horizontal positioned, just so that production process loading, unloading material efficient is low, labor strength big, work situation is poor, and the reduction tank is yielding in the high-temperature vacuum smelting process, and service life is short, and heat utilization rate only reaches 30-40%.On July 18th, 2007 was authorized disclosed " vertical volatile metal reduction pot " by name in by China Intellectual Property Office, Granted publication CN2923732Y, this utility model is that the reduction tank is vertically mounted in the heating furnace, upper end at the reduction tank is equipped with the preheating storage bin, and the lower end of reduction tank links to each other with the furnace bottom of heating furnace by bracing frame; Upper end with the discharge nozzle of coolant jacket links to each other with the lower end sealing of reduction tank, but the lower end of discharge nozzle is equipped with the drawing mechanism of water jacket and open and close.The characteristics of above-mentioned utility model are can the raw material in the production process be preheated, and production efficiency is improved.But in actual application, the problem that mainly has following aspect, 1, because the water jacket of cooling discharging is arranged in vertically arranged reduction jar bottom, this will make and be reduced the accumulation of metal that evaporates in the smelting process in a reduction jar lower end, cause metal recovery rate to reduce on the one hand, cause blanking to be blocked on the other hand; 2, because the contact surface of vertically arranged reduction jar bottom process furnace is annular, and in use trim each other is less, causes the loss of high-temperature flue gas easily, the thermo-efficiency of reduction process is reduced.

At present, the reduction tank is no matter be horizontal positioned, or vertical the placement, all be that the raw material that will be reduced is filled in the cross section in the circular reduction tank, because it is relatively poor to be reduced the heat conductivility of raw material, when carrying out the heat conduction by reduction tank outer surface, the raw material at reduction tank center just need to have the sufficiently long time, it is temperature required just to be heated to reduction, and this just causes the recovery time long, the problems such as energy consumption is big, reduction tank weak point in service life.The disadvantageous problem of deslagging also is that vertical reducing furnace is promoted one of difficult problem simultaneously.

Summary of the invention

The objective of the invention is to overcome above-mentioned technological deficiency, provide a kind of and can effectively reclaim reduced metal, the tank that can effectively guarantee to reduce simultaneously cooperates firmly with the sealing surface of heating furnace lower end, and is convenient to the vertical reducing furnace of discharge.

For achieving the above object, technical scheme of the present invention is: a kind of vertical reducing furnace, comprise the reduction jar that is vertically mounted in the process furnace, be installed in the metallic crystal device on reduction jar top and be installed in the drawing mechanism of reduction jar lower end, it is characterized in that in the reduction jar, being equipped with and reducing the auxilliary jar of jar concentric tubular, on the barrel of auxilliary jar of tubular, have the hole, with the upper end fixedly link, the furnace bottom of process furnace is stretched out in the lower end of reduction jar, the bottom of reduction jar is a reverse taper, discharge port is opened on reverse taper, and the lower end that tubular is auxilliary jar is sitting on the discharge port on the reverse taper.

Above-mentioned metallic crystal device removable seal is installed in the top of reduction jar.

Above-mentioned metallic crystal device is coaxial with the reduction tank.

The upper end of the auxiliary tank of above-mentioned tubular is useful on the device of mentioning the auxiliary tank of tubular.

Above-mentioned device be used to mentioning the auxiliary tank of tubular is mounted in the handle of the auxiliary tank of tubular upper end or the hole that symmetrical two of opening are used for installing hook on the barrel of the auxiliary tank of tubular upper end.

Above-mentioned drawing mechanism is made up of water jacket and the Dump gate that is installed in the sealing of water jacket lower end, and water jacket inner chamber top is cone surface, and this cone surface is corresponding with the discharge port that reduces on the reverse taper of bottom of jar.

Characteristics of the present invention are: 1, owing to increased tubular in the tank and had the auxiliary tank in hole at barrel in reduction, reduced metal steam in the reduction process can be by the material in the reduction tank and the hole on the auxiliary tank barrel, enter in the crystallizer on the reduction tank, reduced the resistance that reduced metal steam enters crystallizer, but the metal productive rate of Effective Raise reduction process.Take magnesium metal as example, every reduction tank one-pot material 120kg goes out magnesium 16-18kg, and material magnesium ratio is for about 7:1.After adopting this device, in same charge and adding in the situation of heat, go out magnesium 20-25kg, material magnesium is than for about 5:1; 2, because the bottom of reduction tank is taper, on the one hand when the state of smelting, auxiliary tank just will reduce the feed opening self-closed of pot bottom, high-temp. furnace material is not directly contacted with feed opening, so just can make the simple of feed opening structure change, the service life that also can effectively improve the feed opening sealing surface simultaneously; The sealing surface of tank and heating furnace bottom of reducing on the other hand seal by ring surface of the prior art, has become the taper surface sealing, can effectively improve sealing effectiveness, thereby has saved maintenance cost, has reduced the loss of the interior thermal current of heating furnace; 3, during discharge, crystallizer is unloaded, mentioning auxiliary tank just can open the feed opening of reduction pot bottom, simultaneously can be by moving up and down auxiliary tank, the pine that just slag charge in the reduction tank can be shaken just can make reacted slag charge discharge smoothly, simultaneously with the water leg of original drawing mechanism by the external belt taper, change the taper of inner band into, make that slag charge decline process medium velocity reduces, cooling is more abundant, improved the security in the discharging process.

Description of drawings

Accompanying drawing 1 is structural representation of the present invention.

Embodiment

Take magnesium metal smelting as example, as shown in Figure 1, reduction tank 3 is vertically mounted in the heating furnace, and heating furnace furnace roof 2 is stretched out on the top of reduction tank, and metallic crystal device 1 is installed in and reduces in the water leg 14 that tank 3 end sealings are connected.The bottom of reduction tank is reverse taper 8, and installations that match of reverse taper that this big end makes progress outside and Bottom of Heating Furnace 7 makes furnace bottom and reverse taper formation cone match.Discharge port 9 is opened in the reverse taper lower end.Bottom at the reduction tank is equipped with drawing mechanism 10, this device is made up of water leg and the sealing Dump gate 11 that is installed in the water leg lower end, the inner chamber top of water leg is taper seat, and the discharging opening 9 on the reverse taper of bottom of above-mentioned taper seat and reduction tank is corresponding.Be equipped with in the tank and reduce the auxiliary tank 5 of the concentric tubular of tank in reduction, the uniform hole 6 that has on the barrel of the auxiliary tank of tubular, the lower end of the auxiliary tank of tubular are sitting on the discharging opening 9 on the reverse taper.

During use, be potted in the reduction tank tubular is auxiliary, the lower end of the auxiliary tank of tubular is sitting on the discharging opening 9 on the reverse taper, discharging opening is sealed.Raw material 4 is packed in the ring-shaped cavity of reduction jar inwall and the auxilliary tank wall formation of tubular, then metallic crystal device 1 is placed on the top of reduction jar 3, water jacket 14 is enclosed within on the metallic crystal device 1, by bolt with the water jacket lower end with after the end sealing of reduction jars 3 is connected, by vacuumizing in 13 pairs of reduction jars of vacuum-pumping tube.Heating furnace heats the reduction tank wall, makes the temperature of charge in the reduction tank rise to reduction temperature, and the magnesium metal of reduction can enter in the metallic crystal device by the material in the reduction tank and the hole on the auxiliary tank barrel.After reaction finishes, the metallic crystal device is unloaded, fetch boiling water the simultaneously sealing Dump gate 11 of chuck lower end, be contained in the hole 12 that symmetrical two of opening are used for installing hook on the barrel of the auxiliary tank of tubular upper end with promoting with hook, upwards mention the auxiliary tank of tubular, the discharging opening 9 of bottom of reduction tank is opened, and reacted waste residue will flow out along discharging opening, drawing mechanism.Water jacket on the drawing mechanism is in order to reduce the drop temperature of waste residue.For guaranteeing the smooth and easy of discharging, the auxiliary tank of tubular can be shaken up and down, make waste residue loosening, be convenient to discharge.

The device that is used for mentioning the auxiliary tank of tubular also can be the handle of the auxiliary tank of tubular upper end, its objective is the auxiliary tank of tubular is upwards mentioned, and can move up and down.

Claims

1. vertical reducing furnace, comprise the reduction jar that is vertically mounted in the process furnace, be installed in the metallic crystal device and the drawing mechanism that is installed in reduction jar lower end on reduction jar top, it is characterized in that in reduction jar (3), being equipped with and reducing jar concentric tubular auxilliary jar (5), on the barrel of auxilliary jar of tubular, have hole (6), with the upper end fixedly link, the furnace bottom (6) of process furnace is stretched out in the lower end of reduction jar (3), the bottom of reduction jar is reverse taper (8), discharge port (9) is opened on reverse taper, and the lower end that tubular is auxilliary jar is sitting on the discharge port (9) on the reverse taper (8).

2. vertical reducing furnace according to claim 1 is characterized in that above-mentioned metallic crystal device (1) removable seal is installed in the top of reduction jar (3).

3. vertical reducing furnace according to claim 2 is characterized in that above-mentioned metallic crystal device (1) is coaxial with reduction jar (3).

4. according to claim 1 or 2 or 3 described vertical reducing furnaces, it is characterized in that the upper end of above-mentioned tubular auxilliary jar (5) is useful on the device of mentioning tubular auxilliary jar (5).

5. vertical reducing furnace according to claim 3 is characterized in that the above-mentioned device that is used to mention tubular auxilliary jar (5) is mounted in the handle of auxilliary jar of (5) upper end of tubular or two holes (12) that are used to install hook that symmetry is opened on the barrel of auxilliary jar of (5) upper end of tubular.

6. vertical reducing furnace according to claim 5, it is characterized in that above-mentioned drawing mechanism (10) is made up of water jacket and the Dump gate (11) that is installed in the sealing of water jacket lower end, water jacket inner chamber top is cone surface, and the discharge port (9) on the reverse taper (8) of bottom of this cone surface and reduction jar is corresponding.