CN209468487U - High efficiency metallic Smelting magnesium device - Google Patents

Abstract

The utility model discloses a kind of high efficiency metallic smelting devices, including reductive jar, it is packed into after evenly mixing in a certain way by pretreated thermophore and powdered reaction raw materials in the reaction zone of reductive jar, one end of reaction zone far from reductive jar is provided with crystallizer, water circulation system is provided on the outside of crystallizer, the outside of the reaction zone of reductive jar is provided with heating system, and reductive jar is also connected to vacuum system.Thermophore is pressed into pellet in ball processed and obtains mixing pellet, pellet and thermophore can also be added in tank after mixing, mixing pellet can also be mixed with pellet and be added in tank simultaneously, it is distributed in thermophore inside pellet, between pellet and between pellet and tank skin, to increase heat conductive contact area, complex heat transfer efficiency is improved, passing time of the heat inside pellet and between pellet is shortened, so as to shorten the recovery time, productivity is improved.

Description

High efficiency metallic Smelting magnesium device

Technical field

The utility model belongs to metal smelt technical field, and in particular to a kind of high efficiency metallic smelting device and using should The method of device progress metal smelt.

Background technique

Currently, former magnesium production is concentrated mainly on China in the world, and China's original Smelting magnesium relies primarily on Pidgeon process production.Skin River method is also referred to as external-heat ferrosilicon process, and the process is firstly the need of raw material (calcined dolomite, ferrosilicon, the firefly that will be smelted Stone etc.) it is crushed, mixed, is milled, it is pressed into pelletizing (pellet), is then added in reductive jar (reactor), with fuel or electricity It being heated outside reductive jar, heat is transmitted along tank skin to pellet, meanwhile, reductive jar is vacuumized with vacuum pump, makes tank Interior pellet issues raw reduction reaction in high temperature and vacuum condition, and the magnesium vapor of generation is condensed into crude magnesium in crystallizer, by essence Casting ingot becomes commodity magnesium.

Reduction process carries out under vacuum conditions in above-mentioned tank, and heat is transferred to pellet from reduction tank skin, then passes through pellet Between transmitted, for the diabatic process mainly based on the conduction and radiation between pellet, magnesium vapor heat convection is the comprehensive of spoke Close heat transfer form.Due to ferrosilicon process with raw material shape based on spheroid shape, in tank in the form of point contact arrange.The side of point contact Formula makes heat-transfer area very little, so that the thermal resistance between pellet is increased, and pellet itself thermal coefficient is smaller, and heat is outside pelletizing Inside delivery rate is very slow, and the thermal coefficient of pellet will also reduce as the temperature rises, this all seriously affected material and Heat-transfer effect between material, so that the smelting process reduction cycle is long (generally at 10-12 hours), production efficiency is low. There is enterprise to attempt to refine magnesium using perpendicular tank method, but the recovery time does not significantly reduce.And it can by the data of some scholars To know, heat is transmitted along tank skin into tank, until the required time is about 8 hours or more when central temperature is identical as tank wall temperature, Account for reduction total time about 70% or more.As it can be seen that heat transfer efficiency is low to affect reduction reaction rate, so that the recovery time significantly prolongs It is long.

The country has researcher to propose the heat-conducting plate that is welded in reductive jar, improves heat transfer to increase the contact area of heat transfer Efficiency.And increases heat-conducting plate in tank and will cause reductive jar manufacturing process complexity, increased costs；Meanwhile during thermal reduction Sticky object easy to form needs frequently cleaning on heat-conducting plate, prevent process operation is from continuous.From the actual fortune of some factories From the point of view of row situation, the mode for increasing heat-conducting plate in tank can not effectively improve heat transfer efficiency, shorten the recovery time, improve production Rate.And the low problem of heat transfer efficiency in tank is also a major reason for hindering reductive jar to can not achieve enlargement.

Utility model content

The purpose of this utility model be in magnesium metal smelting technique, restore between top tank structure and pellet, pellet and material Because heat conductive contact area is small between ball, the problem that the reasons such as pellet thermal coefficient is low cause heat exchange efficiency low is provided a kind of high Efficiency metal smelting device and the method for carrying out metal smelt using the device, increase thermophore, and fill it in reductive jar Gap between full pellet and pellet and between pellet and reduction tank skin, or be distributed in inside pellet, to expand reductive jar Heat conductive contact area between inner wall and pellet, between pellet and pellet increases heat and passes inside material and between material The complex heat transfer coefficient passed improves heat exchange efficiency, and is allowed to be applied in actual production by technological design, solves the prior art The Industries such as the technique reduction reaction time is long, production efficiency is low, big high, the equipment holding time length of fuel consumption.

The purpose of this utility model is achieved in that

High efficiency metallic smelting device, including reductive jar, by pretreated thermophore and powdered reaction raw materials with one Determine mode to be packed into after evenly mixing in the reaction zone of reductive jar, one end of the reaction zone far from reductive jar be provided with crystallizer, Be provided with water circulation system on the outside of crystallizer, the outside of the reaction zone of reductive jar is provided with heating system, reductive jar also with vacuum System connectivity.

The thermophore is carbon-based material, metal_based material, carborundum-based ceramic material, silicon nitride ceramic material and oxygen Change at least one of Al-base ceramic material.

The carbon-based material is charcoal, coal or graphite, and metal_based material is tantalum, niobium or tungsten, carborundum-based ceramic material For diamond dust, silicon nitride ceramic material is silicon nitride ceramics, and alumina-based ceramic material is corundum or mullite.

The granularity of the thermophore is 1-50mm.

The thermophore and powdered reaction raw materials are mixed in a manner of any one by following: A. pellet is mixed with thermophore Uniformly；B. pellet is mixed；C. thermophore is uniformly mixed with mixing pellet；D. pellet is uniformly mixed with mixing pellet；E. expect Ball, mixing pellet are uniformly mixed with thermophore；The pellet is suppressed by powdered reaction raw materials, mixes pellet by thermophore It is suppressed after mixing with powdered reaction raw materials.

The reductive jar is to be horizontally mounted or right angle setting.

It further include the screening plant that thermophore and material residue is separated, the discharge outlet of reductive jar is arranged in screening plant.

It further include waste-heat recovery device, the discharge outlet of reductive jar is arranged in waste-heat recovery device.

It further include waste-heat recovery device, waste-heat recovery device is located between the discharge port and screening plant of reductive jar.

Thermophore can be pressed into pellet in ball processed and obtain by a kind of high efficiency metallic smelting device provided by the utility model Pellet must be mixed, pellet and thermophore can also be added in tank after mixing, while can also be by mixing pellet and pellet Mixing is added in tank, is distributed in thermophore inside pellet, between pellet and between pellet and tank skin, to increase hot biography Contact area is led, complex heat transfer efficiency is improved, passing time of the heat inside pellet and between pellet is shortened, to contract The short recovery time improves productivity.To which after reaction, pellet is excluded out of tank together with heat carrier, recycled into waste heat Device after ground-slag to be restored, is separated powdery reducing slag and particulate heat carrier with screening plant, and reducing slag is transported to cinder field, Heat carrier is reusable.

Compared with the existing technology, the beneficial effects of the utility model are as follows:

The utility model uses in metal smelt technique, through preliminary identification, significant effect:

1) heat transfer efficiency in tank can be effectively improved, the time that temperature in tank reaches balance is shortened；

2) operation cycle can be shortened, realizes energy saving；

3) production efficiency can be improved, reduce production cost；

4) service efficiency of reductive jar can be improved, reduce the operation waiting time, reduce artificial and equipment cost.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the structural schematic diagram that thermophore is mixed with pellet.

Fig. 3 is the structural schematic diagram for mixing pellet.

Fig. 4 is thermophore and mix the structural schematic diagram of pellet mixing.

Fig. 5 is pellet and mix the structural schematic diagram of pellet mixing.

Fig. 6 is the structural schematic diagram of thermophore, pellet and mixing pellet mixing.

Fig. 7 is the structural schematic diagram for including screening plant.

Fig. 8 is the structural schematic diagram for including waste-heat recovery device and screening plant.

Fig. 9 be reductive jar be right angle setting when structural schematic diagram.

Figure 10 be reductive jar be right angle setting when, the structural schematic diagram including waste-heat recovery device and screening plant.

Wherein, 1 is pellet；2 be thermophore；3 be reductive jar；4 be crystallizer；5 be water circulation system；6 be heating system； 7 be vacuum system；8 be mixing pellet；9 be screening plant；10 be waste-heat recovery device.

Specific embodiment

Pellet 1 is suppressed by dusty raw materials, and drawing method is the prior art；Pellet 8 is mixed by thermophore 2 and powder Shape raw material is suppressed, and drawing method is identical as the drawing method of pellet 1.

As Figure 1-10 shows, high efficiency metallic smelting device, including reductive jar 3, by pretreated thermophore 2 and powder Shape reaction raw materials are packed into after evenly mixing in a certain way in the reaction zone of reductive jar 3, one of the reaction zone far from reductive jar 3 End is provided with crystallizer 4, water circulation system 5 is provided on the outside of crystallizer 4, the outside of the reaction zone of reductive jar 3 is provided with heating System 6, reductive jar 3 are also connected to vacuum system 7.

Thermophore 2 is carbon-based material, metal_based material, carborundum-based ceramic material, silicon nitride ceramic material and oxidation At least one of Al-base ceramic material.

Carbon-based material is charcoal, coal or graphite, and metal_based material is tantalum, niobium or tungsten, and carborundum-based ceramic material is gold Emery, silicon nitride ceramic material are silicon nitride ceramics, and alumina-based ceramic material is corundum or mullite.

The granularity of thermophore 2 is 1-50mm, preferably 20mm or less.

The shape of thermophore 2 can be regular circle, ellipse or prismatic etc., be also possible to irregular polyhedron, It is in granular form.

Heating system 6 can be electric heating, can also be heated with fuel；It can also add out of tank from tank external heat Heat, while being also possible to Hybrid Heating.

Thermophore 2 and powdered reaction raw materials are mixed in a manner of any one by following: A. pellet 1 mixes with thermophore 2 It is even；B. pellet 8 is mixed；C. thermophore 2 is uniformly mixed with mixing pellet 8；D. pellet 1 is uniformly mixed with mixing pellet 8；E. Pellet 1, mixing pellet 8 are uniformly mixed with thermophore 2；The pellet 1 is suppressed by powdered reaction raw materials, mixes pellet 8 It is suppressed after mixing by thermophore 2 and powdered reaction raw materials.

The reductive jar 3 is to be horizontally mounted or right angle setting.

It further include the screening plant 9 that thermophore 2 and material residue is separated, the discharge port of reductive jar 3 is arranged in screening plant 9 Place.

It further include waste-heat recovery device 10, the discharge outlet of reductive jar 3 is arranged in waste-heat recovery device 10.

Further include waste-heat recovery device 10, waste-heat recovery device 10 be located at reductive jar 3 discharge port and screening plant 9 it Between.

The method for carrying out metal smelt using above-mentioned high efficiency metallic Smelting magnesium device, the specific steps are as follows:

1. preparing mixture according to any one following mode: A. pellet 1 is uniformly mixed with thermophore 2；B. mixture Ball 8；C. thermophore 2 is uniformly mixed with mixing pellet 8；D. pellet 1 is uniformly mixed with mixing pellet 8；E. pellet 1, mixture Ball 8 is uniformly mixed with thermophore 2；

2. mixture to be packed into the reaction zone of reductive jar 3, crystallizer 4 is installed, seals reductive jar 3；

3. being vacuumized by vacuum system 7 to reductive jar 3, then by heating system 6 to the reaction zone of reductive jar 3 It is heated, so that the raw material in the pellet 1 and/or mixing pellet 8 in reductive jar 3 reaches the condition that reduction reaction occurs；

4. heat is transmitted to inner wall by the outer wall of 3 tank body of reductive jar by heating system 6,3 inner wall of reductive jar passes through heat-carrying again Heat is transmitted to pellet 1 and/or mixing pellet 8 by body 2, then is gradually transmitted to pellet 1 and/or mixing pellet 8 in center；

5. the metallic vapour of generation condenses in crystallizer 4 after reaction starts, condenses the heat released and recycled by water System 5 is taken away；

6. the material in reductive jar 3 is discharged to after reaction, until pellet or mixing 8 dusting of pellet after reaction After material residue, material residue and thermophore 2 are introduced into waste-heat recovery device 10, recycle to material residue and the heat in thermophore 2, so Material residue and thermophore 2 are sieved by screening plant 9 afterwards, material residue is transported to cinder field, and thermophore 2 is reused.

Above-mentioned screening step and waste heat recycling step are not limited to operate in reductive jar spout area, can also be gone out with reductive jar Region operation other than material mouth.

The utility model can be also used for the smelting of metallic zinc, manganese, calcium or strontium.

Powdered reaction raw materials used are magnesite and dolomite when with above-mentioned metal smelt method smelting magnesium or it is forged The oxide containing magnesium after burning.

Waste-heat recovery device 10 and screening plant 9 used in the utility model are commercially available existing device.

Above-described is only preferred embodiments of the present invention, it is noted that for those skilled in the art For, under the premise of not departing from the utility model general idea, several changes and improvements can also be made, these also should be considered as The protection scope of the utility model.

Claims (9)

1. high efficiency metallic Smelting magnesium device, it is characterised in that: including reductive jar (3), by pretreated thermophore (2) and powder Last shape reaction raw materials are packed into after evenly mixing in a certain way in the reaction zone of reductive jar (3), in the reaction far from reductive jar (3) The one end in area is provided with crystallizer (4), is provided with water circulation system (5) on the outside of crystallizer (4), the reaction zone of reductive jar (3) Outside is provided with heating system (6), and reductive jar (3) is also connected to vacuum system (7).

2. high efficiency metallic Smelting magnesium device according to claim 1, it is characterised in that: the thermophore (2) is carbon In sill, metal_based material, carborundum-based ceramic material, silicon nitride ceramic material and alumina-based ceramic material at least It is a kind of.

3. high efficiency metallic Smelting magnesium device according to claim 2, it is characterised in that: the carbon-based material be charcoal, Coal or graphite, metal_based material are tantalum, niobium or tungsten, and carborundum-based ceramic material is diamond dust, and silicon nitride ceramic material is Silicon nitride ceramics, alumina-based ceramic material are corundum or mullite.

4. high efficiency metallic Smelting magnesium device according to claim 1, it is characterised in that: the granularity of the thermophore (2) For 1-50mm.

5. high efficiency metallic Smelting magnesium device according to claim 1, it is characterised in that: the thermophore (2) and powder Shape reaction raw materials mix in the following manner: pellet (1) is uniformly mixed with thermophore (2).

6. high efficiency metallic Smelting magnesium device according to claim 1, it is characterised in that: the reductive jar (3) is level Installation or right angle setting.

7. high efficiency metallic Smelting magnesium device according to claim 1, it is characterised in that: further include by thermophore (2) and The discharge outlet in reductive jar (3) is arranged in the separated screening plant of material residue (9), screening plant (9).

8. high efficiency metallic Smelting magnesium device according to claim 1, it is characterised in that: further include waste-heat recovery device (10), discharge outlet of waste-heat recovery device (10) setting in reductive jar (3).

9. high efficiency metallic Smelting magnesium device according to claim 7, it is characterised in that: further include waste-heat recovery device (10), waste-heat recovery device (10) is located between the discharge port of reductive jar (3) and screening plant (9).