CN103438695A

CN103438695A - Novel submerged arc furnace

Info

Publication number: CN103438695A
Application number: CN2013103401822A
Authority: CN
Inventors: 巴涌
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-02
Filing date: 2013-08-02
Publication date: 2013-12-11

Abstract

The invention discloses a novel submerged arc furnace, which can be used for smelting calcium carbides, industrial silicon, various metal alloys or iron alloy and is applied to open or closed type submerged arc furnaces. The novel submerged arc furnace disclosed by the invention matches with other comprehensive support equipment and a digital operation mode, can reduce the power consumption per tonnage in a smelting process and increase the yield under the condition that normal raw materials are utilized, can realize low-grade raw material smelting, and is beneficial to the safe and stable operation of an environment-friendly dust-removing apparatus and the implementation of a no-man control smelting technique of the submerged arc furnace.

Description

New-type mineral hot furnace

Technical field:

A kind of new-type mineral hot furnace, can be applicable to airtight, semi-hermetic, open mineral hot furnace, for smelting calcium carbide, yellow phosphorus, silicon system (ferrosilicon, silico-calcium, silicon barium, Si-Ca-Ba, metallic silicon), manganese system (ferromanganese, silicomanganese, manganese metal), chromium system or nickel system, molybdenum-iron, ferrotungsten, the various mineral hot furnaces of ferrotianium; Power supply mode adopts direct current, low-frequency ac, intermediate frequency, high-frequency ac; The plasma smelting stove, electromagnetism smelting furnace novel energy mineral hot furnace; Supply transformer adopts three-phase transformer or single-phase transformer; Supply voltage adopts 11KV, 35KV, 66KV, 110KV, 220KV or voltage levels more, mineral hot furnace power 500-500000 kilowatt; Electrode adopts prebake or self-baking carbon electrode, or graphite and other electrode; Secondary power supply power-up device adopts brasses or composite electrode holder conducting element or other to power up mode.

Background technology:

From the mineral hot furnace cross section, the burner hearth cross section that tradition is smelted is all circular, minority is rectangle or ellipse, but except circle, supply load and electric potential gradient asymmetry problem that alternate manner causes because of the asymmetry of its practical application, and because the unbalanced placement operations difficulty of stove three-phase electrode is eliminated greatly and substantially fully; The spherical hearth structure only just retained at present, in the application of small-power mineral hot furnace, also maintain reluctantly, large-scale mineral hot furnace adopts spherical hearth can't realize the unit consumption index of little mineral hot furnace and embody the advantage of scale, large-scale airtight, semi-hermetic or open mineral hot furnace are used traditional burner hearth to cause on electrode and are lifted, causing smelting energy consumption increases, derivative fault is more, is difficult to long-term low consumption stable operation, also harsher to the raw material grade requirement.

Summary of the invention:

Goal of the invention (problem of solution)

This new-type mineral hot furnace has brand-new design angle and thinking; It is mainly under the prerequisite that guarantees load and electrode pan feeding, smelt dead band by minimizing, while realizing mine heat furnace smelting, electrode is better inserted dark, to improve the mineral hot furnace energy utilization rate, and, by effectively improving efficiency, the power factor of smelting transformer self, increase the applicability of mineral hot furnace low grade material simultaneously;

This structure that new-type mineral hot furnace adopts, adopt under the single-phase transformer deployment scenarios in large-scale mineral hot furnace, can make the more contiguous mineral hot furnace burner hearth of each single-phase transformer center, can effectively shorten the short net length of ore furnace secondary, reduces short network loss; But to note carrying out security protection and the reinforcement transformer Coolings such as the fire prevention of transformer, anti-high temperature simultaneously;

Smelt term----dead band, refer to approach between two electrodes in burner hearth the place of the easy buildup in furnace wall.

Technical scheme

New-type burner hearth cross-sectional structure:

1. the burner hearth cross section of new-type mineral hot furnace, that three electrodes adopt equilateral triangle to arrange, the geometric center of three central points of three electrode cross-section geometric centers of take is the burner hearth center, take the geometric electrode center as the center of circle, the 1.399-9.999 of external concentric circles diameter of electrode diameter or electrode cross-section of take doubly does circle as diameter, this circle is called the lobe circle, three cross-sectional structures that the crossing three lobe plum blossom closed curves that surround of lobe circle are the mineral hot furnace burner hearth;

Electrode be circle electrode diameter be exactly the external concentric circles diameter of electrode, electrode adopts other shape, the external concentric circles diameter that the diameter value is electrode cross-section;

2. the burner hearth cross section of new-type mineral hot furnace has the equivalent structure that a kind of tangent section and lobe circular arc form, it is characterized in that: tangent at the two lobes circles of three grooves of three lobe plum blossoms and three lobe plum blossoms respectively with three straight lines, the mineral hot furnace burner hearth cross-sectional structure that three straight lines tangent section that the lobe circle surrounds by three sections lobe circular arcs in the stove outside between three sections tangent sections between point of contact and two point of contacts and the tangent closed curve of circular arc are the burner hearth cross section;

3. the burner hearth cross section of new-type mineral hot furnace has a kind of circular arc and the unsmooth equivalent structure be connected to form of lobe circular arc, it is characterized in that: tangent at the two lobes circles of three grooves of three lobe plum blossoms and three lobe plum blossoms respectively with three straight lines, article three, three tangent sections of the generation of straight line between point of contact, do circle in the three lobe plum blossom groove outsides by two end points of tangent section, this circle protruding height of the minor arc to the burner hearth center position between the tangent section two-end-point is less than 0.15 times of lobe circular diameter, the mineral hot furnace burner hearth cross-sectional structure that the unsmooth connecting sealed curve of multi sphere surrounded by three sections lobe circular arcs in the stove outside between protruding three sections minor arcs in stove and three lobe plum blossom lobes circle, two point of contacts between the tangent section two-end-point is the burner hearth cross section,

4. the burner hearth cross section of new-type mineral hot furnace has a kind of tangent multi sphere and the equivalent structure of lobe circular arc formation, it is characterized in that: at the groove of three lobe plum blossoms, the 0.100-49.99 of the external concentric circles diameter of the electrode cross-section of take is circle outside diameter is done three doubly, mutually circumscribed with two plum blossom lobe circles at three lobe plum blossom grooves, one section protruding arc to the stove heart between three each outside circles of outside circle and round two point of contacts of two plum blossom lobes, the mineral hot furnace burner hearth cross-sectional structure that the tangent closed curve of multi sphere surrounded by the lobe circular arc outside stove between each upper two point of contact of lobe circle of these three sections protruding arcs to the stove heart and three lobe plum blossoms is the burner hearth cross section.

5. the burner hearth center longitudinal profile of crossing of new-type mineral hot furnace adopts: column, up big and down small shape, up-small and down-big platform shape, hyperbola, adopt step-like contraction from furnace roof section to the furnace bottom layering, or adopt the structure of step-like expansion from furnace roof section to the furnace bottom layering, or the part-structure of said structure mixes;

6. the shape of cross section of new-type mineral hot furnace furnace shell adopts circular or mates with new-type mineral hot furnace burner hearth cross-sectional structure and satisfied shape of smelting needs.

Beneficial effect

New-type mineral hot furnace, with regard to homogeneous raw material and transformer capacity, adopt in digitlization operation control situation, and smelting the electric unit consumption of ton can be lower than traditional burner 3-5%, volume increase 5-10%;

The stove of new-type mineral hot furnace, because transformer approaches mineral hot furnace burner hearth geometric center, the significantly shortening of the short net of ore furnace secondary, short network loss also can reduce, thereby realizes energy-saving run, and single power consumption is lower.

The accompanying drawing explanation:

Fig. 1: new-type mineral hot furnace three lobe plum blossom closed curve structure burner hearth cross sections;

Fig. 2: the sealing equivalent structure burner hearth cross-sectional view that a kind of tangent section of burner hearth cross section of new-type mineral hot furnace and circular arc form;

Fig. 3: a kind of circular arc of burner hearth cross section of new-type mineral hot furnace and the unsmooth sealing equivalent structure burner hearth cross-sectional view be connected of three lobe plum blossom lobe circles;

Fig. 4: the sealing equivalent structure burner hearth cross-sectional view that a kind of multi sphere of burner hearth cross section of new-type mineral hot furnace is tangent;

The accompanying drawing explanation:

1 burner hearth; 2 furnace shells; 3 furnace walls and furnace lining composite construction; 4 electrodes; 5 three lobe plum blossom lobe circles; The tangent tangent section of 6 and three lobe plum blossom lobe circles; 7 through the protruding minor arc in stove of two end points of tangent section; 8 is protruding in arc tangent with two lobes circles of three lobe plum blossoms in stove.

The specific embodiment:

1. the construction of the furnace shell of new-type mineral hot furnace and structure circular similar or employing and burner hearth cross section coupling, new-type mineral hot furnace bell adopts round or designs and produces separately according to new-type mineral hot furnace cross-sectional structure shape;

2. burner hearth is built by laying bricks or stones and can be adopted traditional laying fireproof bricks mode; Or brick type structure and size be from traditional different, the refractory brick desired design, carry out the decomposition of refractory brick size according to chamber structure, then make and fire, build by laying bricks or stones, the size of concrete is olation and special type brick will guarantee that the burner hearth masonry construction is heated and the science of deformation, builds sturdy and durable getting final product by laying bricks or stones;

3. burner hearth is built by laying bricks or stones and can also be adopted prefabricated mould, as made concrete member, and form removal after drying, then integral body is fired burner hearth internally or in conjunction with the outside variety of way that adopts, or the automatic sintering while moving that feeds intake forms;

4. the firing and build by laying bricks or stones similarly to tradition of the furnace bottom carbon brick of new-type mineral hot furnace, also can adopt new brick shape physical dimension, can adopt the building method at the bottom of round kiln, only after masonry of well completes, builds the burner hearth firebrick structure of new-type mineral hot furnace feature by laying bricks or stones;

5. the plug for outlet of new-type mineral hot furnace is the same with spherical hearth, is positioned at the place, furnace wall of height at the bottom of the electrode lower furnace, or other furnace wall thin location;

6. electrode, hydraulic system, Environmental-protecting dust-removing, the material loading cloth, the raw material stoving fragmentation, control automatically and the furnace transformer design adopts traditional approach, and transformer and short net electric parameter value have difference;

7. the polytechnic use of short net must science, and short slab and defect are not stayed in short net low tension loop;

8. guarantee material quality and material quality stability, operation wants corresponding raw material condition to do the science adjustment;

9. what mineral hot furnace was overall patrols and examines in time and safeguards, guarantees each equipment availability and utilization rate, reduces mineral hot furnace heating blowing-out time and number of times as far as possible.

Claims

1. a new-type mineral hot furnace, it is characterized in that: the burner hearth cross section of new-type mineral hot furnace, that three electrodes adopt equilateral triangle to arrange, the geometric center of three central points of three electrode cross-section geometric centers of take is the burner hearth center, take the geometric electrode center as the center of circle, the 1.399-9.999 of external concentric circles diameter of electrode diameter or electrode cross-section of take doubly does circle as diameter, and this circle is called the lobe circle, and three lobes circles intersect the cross-sectional structures that the three lobe plum blossom closed curves that surround are the mineral hot furnace burner hearth;

Electrode be circle electrode diameter be exactly the external concentric circles diameter of electrode, electrode adopts other shape, the external concentric circles diameter that the diameter value is electrode cross-section.

2. according to claim 1, the equivalent structure that the burner hearth cross section of new-type mineral hot furnace has a kind of tangent section and lobe circular arc to form, it is characterized in that: tangent at the two lobes circles of three grooves of three lobe plum blossoms and three lobe plum blossoms respectively with three straight lines, the mineral hot furnace burner hearth cross-sectional structure that three straight lines tangent section that the lobe circle surrounds by three sections lobe circular arcs in the stove outside between three sections tangent sections between point of contact and two point of contacts and the tangent closed curve of circular arc are the burner hearth cross section.

3. according to claim 1, the burner hearth cross section of new-type mineral hot furnace has a kind of circular arc and the unsmooth equivalent structure be connected to form of lobe circular arc, it is characterized in that: tangent at the two lobes circles of three grooves of three lobe plum blossoms and three lobe plum blossoms respectively with three straight lines, article three, three tangent sections of the generation of straight line between point of contact, do circle in the three lobe plum blossom groove outsides by two end points of tangent section, this circle protruding height of the minor arc to the burner hearth center position between the tangent section two-end-point is less than 0.15 times of lobe circular diameter, the mineral hot furnace burner hearth cross-sectional structure that the unsmooth connecting sealed curve of multi sphere surrounded by three sections lobe circular arcs in the stove outside between protruding three sections minor arcs in stove and three lobe plum blossom lobes circle, two point of contacts between the tangent section two-end-point is the burner hearth cross section.

4. according to claim 1, the burner hearth cross section of new-type mineral hot furnace has a kind of tangent multi sphere and the equivalent structure of lobe circular arc formation, it is characterized in that: at the groove of three lobe plum blossoms, the 0.100-49.99 of the external concentric circles diameter of the electrode cross-section of take is circle outside diameter is done three doubly, mutually circumscribed with two plum blossom lobe circles at three lobe plum blossom grooves, one section protruding arc to the stove heart between three each outside circles of outside circle and round two point of contacts of two plum blossom lobes, the mineral hot furnace burner hearth cross-sectional structure that the tangent closed curve of multi sphere surrounded by the lobe circular arc outside stove between each upper two point of contact of lobe circle of these three sections protruding arcs to the stove heart and three lobe plum blossoms is the burner hearth cross section.