CN102296146A - Metal slit-type ladle bottom blowing powder injection apparatus - Google Patents
Metal slit-type ladle bottom blowing powder injection apparatus Download PDFInfo
- Publication number
- CN102296146A CN102296146A CN2011102351418A CN201110235141A CN102296146A CN 102296146 A CN102296146 A CN 102296146A CN 2011102351418 A CN2011102351418 A CN 2011102351418A CN 201110235141 A CN201110235141 A CN 201110235141A CN 102296146 A CN102296146 A CN 102296146A
- Authority
- CN
- China
- Prior art keywords
- metal
- slit
- powder injection
- bottom blowing
- blowing powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a metal slit-type ladle bottom blowing powder injection apparatus which belongs to the steel refining technical field. The apparatus comprises two parts of a metal slit-type powder injection element and an air accumulating chamber, the metal slit-type powder injection element is connected with the air accumulating chamber through flange bolts; wherein the metal slit-type powder injection element comprises an external metal shell and an refractory material which has slits inside, a metal plate is provided on an inner wall of the slit, a metal base plate is provided on the bottom of the refractory material, a through hole provided on the metal base plate is communicated with the slits, the circumference of the metal base plate is connected with the metal shell, the bottom of the metal plate is connected with the metal base plate, the top of the metal plate is positioned at the top of the slit. The invention has the advantages that the strength for powder injection smelting is enhanced, the strength is high at the high temperature, the metal slits are welded for difficult deformation, the apparatus of the invention has the advantages of good airtight, stable blowing, low manufacture cost, large adjustable scope of power and air amount, long usage life, safety and reliability.
Description
Technical field
The invention belongs to iron and steel refining techniques field, particularly a kind of metal slit formula ladle bottom blowing powder injection device.
Background technology
The ladle bottom blowing powder injection refining is the new technology of an emerging creative and broad prospect of application, but since the Working environment that dusts at the bottom of the ladle to stir environment than steel ladle bottom argon blowing abominable, it is to be solved to be faced with many technical problems after powder injection process proposes at the bottom of the ladle.In the middle of the smelting process of dusting, pulvis needs to send into inside, molten bath through the element that dusts, the element design of dusting should solve the pulvis continous-stable and spray into and do not take place to stop up, guarantee the safe and reliable bleed-out accident of avoiding taking place again, should guarantee that pulvis straying quatity scope is adjustable controlled, require refractory materials wear-and corrosion-resistant long service life again, it is the core parts of powder injection process at the bottom of the ladle.The element that dusts is in the middle of high temperature and the strong powder air-flow abrasive environment, and its design and use performance is directly connected to the success or failure of dusting, determining ladle at the bottom of powder injection process can carry out and apply.
At present at the bottom of the ladle in the spraying powder refining technique, there is technology to propose to adopt the slit refractory materials to carry out the technology of injection refining at the bottom of the ladle.The element internal that dusts that this technology adopts forms the slit by refractory materials, and pulvis enters the element slit of dusting by air receiver, sees through the slit and enters the ladle molten bath, this mode, utilize gas as carrier, the solid powder/particle of reactant is directly injected to depths, ladle molten bath, avoided contacting of pulvis and air or slag, enlarged the projection interfacial area, increase the partial concn gradient, strengthened stirring, thereby quickened mass transfer process, compare with traditional way, its advantage comprises following several respects:
(1) improve the quality of steel: it can reduce the content of oxygen and sulphur in the steel, and oxide compound and sulfide inclusion thing form in the control steel are improved the cutting ability of steel, reduces all directions opposite sex of steel and hydrogen induced cracking susceptibility etc.And help the polymerization and the come-up of inclusion; (2) improve refining effect: carrier gas is blown into the depths, molten bath with reaction mass, can accelerate the fusing and the dissolving of material, and strengthen reaction area greatly, go back intensive simultaneously and stirred the molten bath, thereby accelerated transmission and reaction process, made the molten bath obtain dynamic conditions preferably; (3) pulvis directly sprays into the depths, molten bath, avoided and the contacting of air and slag, prevented their oxidation, thereby improved the recovery rate of alloy, in addition, dust and to solve the very high element of vapour pressure and the adding problem of diffusing the poisonous gas element under trace alloying element, the steel-making temperature; (4) can adjust molten steel composition accurately, make the more stable quality of steel; (5) equipment is simple, less investment, and process cost is few, and handiness is big, good work environment; (6) throughput of raising smelting furnace.
Element is obtained certain effect in the ladle bottom blowing powder injection field though this dusts, and has significant disadvantages:
(1) bottom blowing powder injection is made of refractory materials with the element slit of dusting, refractory materials directly contacts with pulvis, the air-flow that is pollinated abrasion is serious, cause wavelength width of a slit to become big through the airflow scouring that is pollinated for a long time, molten steel infiltrates the slit and stops up the slit, cause the bleed-out accident when serious easily, therefore, it is short work-ing life with refractory materials to dust;
Consider from security standpoint that (2) for avoiding taking place the bleed-out accident, the design of refractory materials wavelength width of a slit will be tried one's best littler, this causes the powder air-flow to become big at the slit internal resistance, and the air conveying pressure-losses is big, and powder air-flow penetration power reduces in the ladle, influence winding-up metallurgical effect.
Summary of the invention
For overcoming the deficiency that prior art exists, the present invention proposes a kind of metal slit formula ladle bottom blowing powder injection device, by metal slit, solves the powder air-flow and denudes strongly and the problems such as the pressure process loss is big of dusting with refractory materials slit inwall dusting.
Technical scheme of the present invention is achieved in that a kind of metal slit formula ladle bottom blowing powder injection device, is made up of dust element and air receiver two parts of metal slit formula, and the described metal slit formula element that dusts is connected with air receiver by flange bolt;
Wherein, the metal slit formula element that dusts comprises outside metal casing and the inner refractory materials that is provided with the slit, described slit inwall is provided with metal sheet, the refractory materials bottom is provided with the metal bottom surface, the metal bottom surface is provided with through hole and is communicated with the slit, the metal bottom periphery is connected with metal casing, and the metal sheet bottom is connected with the metal bottom surface, and the metal sheet top is positioned at the top, slit;
Described metal sheet, its material comprises: stainless steel, heat-resistance stainless steel, carbon element seamless tube;
The thickness of described metal sheet is: 0.05～20mm;
Described metal bottom surface, its material comprises: stainless steel, heat-resistance stainless steel, carbon element seamless tube;
The thickness of described metal base plate is: 0.05～20mm;
Described clear size of opening is identical with the slit.
Advantage of the present invention: comprise following several respects: (1) long service life, safe and reliable: metal slit has played enhancement to refractory materials, make incrust, the cracking of brick, erosion degree is little, can not occur losing use properties because of wearing and tearing cause refractory materials slit thickness to broaden, improve the element work-ing life of dusting, reduced cost; (2) effectively improved the combustion intensity of dusting: metal slit inwall resistance is little, the loss of powder stream pressure is little, can spray into ladle with kinetic energy more, under equal winding-up condition, use this element that dusts in the ladle molten bath, to obtain the more jet of kinetic energy, jet characteristics directly influences the effusive penetrativity, the intrusion amount of powder, reaction effect between gas-solid-liquid, mobile and the refractory corrosion of molten metal etc., when energy of the impinging jet is enough high, uniform particles is distributed in the cross section of slit, formation has with the similar homogeneous phase of monophasic fluid characteristic flows, and the winding-up metallurgical effect is better; (3) intensity height under the high temperature, metal slit welds together, and firmly is not easy distortion, and resistance to air loss is good, and winding-up is stable; (4) applied range, low cost of manufacture can be according to the requirement of metallurgical effect, can manufacture the element that dusts at the bottom of the ladle of multiple pattern, and as the rectilinear slot formula element that dusts, the annular gap type element etc. that dusts satisfies all kinds of working condition demands; (5) powder tolerance adjustable extent is big: according to metallurgy dust Intensity Design slit total length and slit bar number, slit design has been improved the dynamic conditions of powder air-flow greatly, make steel spraying powder technology become possibility, powder tolerance variable range is big, can satisfy the requirement of dusting at the bottom of the ladle under the various conditions.
Description of drawings
Fig. 1 is the assembly drawing of a kind of metal slit formula of the present invention ladle bottom blowing powder injection element;
Fig. 2 is a kind of metal slit formula of the present invention ladle bottom blowing powder injection element metal rectilinear slot formula element synoptic diagram that dusts;
Fig. 3 (a) is a kind of metal slit formula of the present invention ladle bottom blowing powder injection element metal rectilinear slot formula element vertical view that dusts;
Fig. 3 (b) is a kind of metal slit formula of the present invention ladle bottom blowing powder injection element metal rectilinear slot formula element metal slit enlarged view that dusts;
Fig. 3 (c) is a kind of metal slit formula of the present invention ladle bottom blowing powder injection element metal rectilinear slot formula element front view that dusts;
Fig. 4 (a) is a kind of metal slit formula of the present invention ladle bottom blowing powder injection element metal ring clearance type element vertical view that dusts;
Fig. 4 (b) is a kind of metal slit formula of the present invention ladle bottom blowing powder injection element metal ring clearance type element front view that dusts;
Among the figure, 1, refractory materials; 2, slit; 3, metal sheet; 4, metal casing; 5, metal bottom surface; 6, flange bolt; 7, air receiver chamber; 8, powder air delivery tube; 9, screw; I, the metal slit formula element that dusts; II, air receiver.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
A kind of metal slit formula of the present invention ladle bottom blowing powder injection component fabrication principle is as follows: the metal slit wall, metal bottom surface and metal shell are welded into one in advance, even then closely knit filling fire resisting material, and to the location, every slit of the element that dusts, require the junction not have the space, refractory materials closely is connected with metal, after the element that dusts is reinforced moulding, according to on-the-spot brickwork requirement, element carries out mechanical workout (car to dusting, cut, dig, mill etc.), build requirement by laying bricks or stones to guarantee that component profile size and precision meet, with the coupling of furnace lining on every side, the dust every powder gas channel (slit) of element of reply is simultaneously checked, cleaning guarantees that every slit is unimpeded;
Material requires to comprise: refractory materials requires that void content is low, volume density is high, has the ability of resistance to deformation and fracture during carry load under the high temperature, and wear-resistant, anti-erosion; Metal casing and metal bottom plane materiel matter can adopt the metallic substance with certain hot strength, reference when this place provides stainless-steel sheet or Carbon Steel Plate as design; Metal sheet adopts hot strength height, wear-resistant, erosion resistant metal material, for example stainless steel, heat-resistance stainless steel or carbon element seamless tube etc.
As shown in Figure 1, be the assembly drawing of a kind of metal slit formula of the present invention ladle bottom blowing powder injection element, form that the metal slit formula element I that dusts is connected with air receiver II by flange bolt 6 by dust element I and air receiver II of metal slit formula;
The described metal slit formula element I that dusts comprises refractory materials 1, slit 2, metal sheet 3, metal casing 4 and metal bottom surface 5, the described metal slit formula element I that dusts is round table-like, its outside is surrounded by metal casing 4, its inside is the refractory materials 1 that is provided with slit 2, described slit 2 inwalls are provided with metal sheet 3, refractory materials 1 bottom is provided with metal bottom surface 5, metal bottom surface 5 is provided with through hole and is communicated with slit 2, metal bottom surface 5 peripheries are connected with metal casing 4, metal sheet 3 bottoms are connected with metal bottom surface 5, and metal sheet 3 tops are positioned at the top, slit;
Described metal sheet adopts its material to comprise: stainless steel, heat-resistance stainless steel or carbon element seamless tube;
The thickness of described metal sheet is 1.0mm;
Described metal bottom surface adopts its material to comprise: stainless steel, heat-resistance stainless steel or carbon element seamless tube;
The thickness of described metal base plate is: 1.0mm;
The size of described through hole is identical with the slit;
The width range of described metal slit is: δ=0.05～1.00mm;
The scope of described slit bar number is: n=8～60;
Described refractory materials inside diameter ranges is: Φ
1=6～300mm;
Described refractory materials external diameter scope is: Φ
2=30～400mm;
The described metal slit formula element heights scope of dusting is: H
0=60～800mm;
Embodiment 1:
Present embodiment designs a kind of metal rectilinear slot formula element that dusts, its profile as shown in Figure 2, this metal rectilinear slot formula element that dusts is round table-like, its outside is provided with metal casing 4, inside is provided with gas permeable brick 1, be provided with slit 2 in the gas permeable brick 1, described slit 2 is rectangle, its inwall is provided with metal sheet 3, gas permeable brick 1 bottom is provided with metal bottom surface 5, and metal bottom surface 5 is provided with through hole and is communicated with slit 2, and metal bottom surface 5 peripheries are connected with metal casing 4, metal sheet 3 bottoms are connected with metal bottom surface 5, and metal sheet 3 tops are positioned at the top, slit;
Its metal slit is type linearly, and shown in Fig. 3 (a)～3 (c), its each parameter designing is as follows:
(1) described refractory materials internal diameter Φ
1Selection as follows: should avoid too small powder air-flow polymerization in the ladle molten bath the forming air pocket cloth bag that causes in the intracardiac footpath of brick, avoid the intracardiac footpath of brick excessive again, reduce the jet penetration power, to sum up, present embodiment is got the intracardiac footpath Φ of brick
1=15mm;
(2) described metal slit, its parameter is selected as follows:
The value of wavelength width of a slit δ: in the present embodiment, the molten steel degree of depth is greater than the ladle of 2m in the selection molten bath, bleed-out must just can not take place less than 0.15mm in slit thickness in theory, bleed-out can not take place when in fact gas supply element slit thickness was the hundreds of micron, this is to have stoped molten steel to infiltrate the slit because refractory materials produces a kind of gluey liquid film under the effect of high-temperature molten steel, the degree of roughness of refractory surface also can influence molten steel and infiltrate the slit, for the generation of avoiding the bleed-out accident with reach best winding-up effect, the width value of gas permeable brick is δ=0.15mm in the present embodiment;
Choosing of gap length B, number of slots n and slot placement mode: calculate the powder air communication according to the combustion intensity of dusting and cross total interfacial area, determine gap length B and number of slots n then, the slit is evenly arranged around gas permeable brick brick core, the design of employing rectilinear slot, it is generally acknowledged that the influence on border, two ends, slit can be ignored in B/ δ＞10 in slit o'clock, present embodiment is got gap length B=15mm, and number of slots is got n=16;
(3) described refractory materials Φ
2Selection as follows: under the prerequisite that guarantees gas permeable brick intensity,, get Φ in the present embodiment according to gas permeable brick brick in-core footpath and slot placement mode value
2=66mm;
(4) the dust element heights design of described metal slit formula is as follows: the metal slit formula is dusted element heights by factor such as accelerating length, the erosive velocity decision in the slit of ladle bottom thickness, pulvis, under the winding-up condition that guarantees safe and feasible, should shorten the element heights of dusting as far as possible, lose along stroke pressure to reduce; And the used pulvis of injection refining is generally below 300 orders, pulvis acceleration section is no more than 100mm, it is bigger to the slit thickness effect to dust, but the influence to gap length is less, can continue to use the Argon stirring judges with the gas permeable brick erosive velocity, present embodiment is got erosive velocity average out to 5mm/ time of gas permeable brick, and the metal slit formula element heights value of dusting is H in the present embodiment
0=200mm.
Embodiment 2:
Present embodiment designs a kind of metal ring clearance type element that dusts, its structure is shown in Fig. 4 (a), Fig. 4 (b), concrete structure comprises refractory materials 1, slit 2, metal sheet 3, metal casing 4 and metal bottom surface 5, inside is provided with gas permeable brick 1, be provided with slit 2 in the gas permeable brick 1, described slit 2 ringwise, its inwall is provided with metal sheet 3, gas permeable brick 1 bottom is provided with metal bottom surface 5, metal bottom surface 5 is provided with through hole and is communicated with slit 2, metal bottom surface 5 peripheries are connected with metal casing 4, and metal sheet 3 bottoms are connected with metal bottom surface 5, and metal sheet 3 tops are positioned at the top, slit;
Its concrete parameter designing is as follows:
(1) its internal diameter of described refractory materials Φ
1Value is: avoid the too small powder air-flow polymerization formation air pocket cloth bag in the ladle molten bath that causes in the intracardiac footpath of brick, avoid the intracardiac footpath of brick excessive again, reduce the jet penetration power, to sum up, present embodiment is got the intracardiac footpath Φ of brick
1=20mm;
(2) its external diameter of described refractory materials Φ
2Value is: under the prerequisite that guarantees gas permeable brick intensity, according to gas permeable brick brick in-core footpath and slot placement mode value, get Φ in the present embodiment
2=80mm;
(3) described annulus spacing each other is designed to: guaranteeing gas permeable brick intensity, avoiding thermal stresses to concentrate, considering the decay of difficulty of processing and jet, Δ d=3～7mm;
(4) described endless metal slit, the value of its wavelength width of a slit is: for the generation of avoiding the bleed-out accident with reach best winding-up effect, the width value of gas permeable brick is δ=0.15mm in the present embodiment;
(5) the dust value of element heights of described metal ring clearance type is: the metal slit formula element heights value of dusting is H in the present embodiment
0=200mm;
(6) described annulus bar number is n=2～10.
Claims (6)
1. metal slit formula ladle bottom blowing powder injection device, form by dust element and air receiver of metal slit formula, the described metal slit formula element that dusts is connected with air receiver, it is characterized in that: the described metal slit formula element that dusts comprises outside metal casing and the inner refractory materials that is provided with the slit, described slit inwall is provided with metal sheet, the refractory materials bottom is provided with the metal bottom surface, the metal bottom surface is provided with through hole and is communicated with the slit, the metal bottom periphery is connected with metal casing, the metal sheet bottom is connected with the metal bottom surface, and the metal sheet top is positioned at the top, slit.
2. metal slit formula ladle bottom blowing powder injection device according to claim 1 is characterized in that: described metal sheet, its material comprises: stainless steel, heat-resistance stainless steel, carbon element seamless tube.
3. metal slit formula ladle bottom blowing powder injection device according to claim 1, it is characterized in that: the thickness of described metal sheet is: 0.05～20mm.
4. metal slit formula ladle bottom blowing powder injection device according to claim 1 is characterized in that: described metal bottom surface, its material comprises: stainless steel, heat-resistance stainless steel, carbon element seamless tube.
5. metal slit formula ladle bottom blowing powder injection device according to claim 1, it is characterized in that: the thickness of described metal base plate is: 0.05～20mm.
6. metal slit formula ladle bottom blowing powder injection device according to claim 1, it is characterized in that: described clear size of opening is identical with the slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110235141 CN102296146B (en) | 2011-08-16 | 2011-08-16 | Metal slit-type ladle bottom blowing powder injection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110235141 CN102296146B (en) | 2011-08-16 | 2011-08-16 | Metal slit-type ladle bottom blowing powder injection apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102296146A true CN102296146A (en) | 2011-12-28 |
| CN102296146B CN102296146B (en) | 2013-06-19 |
Family
ID=45356821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110235141 Active CN102296146B (en) | 2011-08-16 | 2011-08-16 | Metal slit-type ladle bottom blowing powder injection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102296146B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560009A (en) * | 2012-01-16 | 2012-07-11 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN102643952A (en) * | 2012-04-28 | 2012-08-22 | 东北大学 | Method for obtaining slot length and width of bottom powder injection element of ladle |
| CN104611511A (en) * | 2015-02-02 | 2015-05-13 | 西安宝科流体技术有限公司 | Intelligent argon bottom-blowing powder spraying control system of coreless induction furnace and control method thereof |
| CN110205444A (en) * | 2019-06-14 | 2019-09-06 | 钢铁研究总院 | A kind of circular seam type bottom blowing gas-feeding brick |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2186858C2 (en) * | 2000-03-13 | 2002-08-10 | ОАО Челябинский металлургический комбинат "МЕЧЕЛ" | Lance for bottom blowing of metal with gases in ladle and method of lance manufacture |
| JP2003231912A (en) * | 2002-02-07 | 2003-08-19 | Kawasaki Refract Co Ltd | Gas blow nozzle |
| CN2861175Y (en) * | 2005-12-13 | 2007-01-24 | 东北大学 | Slit-type ladle bottom blowing power injection apparatus |
| JP2007224398A (en) * | 2006-02-27 | 2007-09-06 | Jfe Steel Kk | Bottom-blow tuyere to be used in smelting vessel |
| CN200978293Y (en) * | 2006-11-22 | 2007-11-21 | 鞍钢集团耐火材料公司 | Narrow slit type air brick capable of increasing blow-opening ratio |
| CN201942701U (en) * | 2011-01-20 | 2011-08-24 | 杨红 | Cluster-type bottom air supply element used for top-bottom combined blowing of converter |
-
2011
- 2011-08-16 CN CN 201110235141 patent/CN102296146B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2186858C2 (en) * | 2000-03-13 | 2002-08-10 | ОАО Челябинский металлургический комбинат "МЕЧЕЛ" | Lance for bottom blowing of metal with gases in ladle and method of lance manufacture |
| JP2003231912A (en) * | 2002-02-07 | 2003-08-19 | Kawasaki Refract Co Ltd | Gas blow nozzle |
| CN2861175Y (en) * | 2005-12-13 | 2007-01-24 | 东北大学 | Slit-type ladle bottom blowing power injection apparatus |
| JP2007224398A (en) * | 2006-02-27 | 2007-09-06 | Jfe Steel Kk | Bottom-blow tuyere to be used in smelting vessel |
| CN200978293Y (en) * | 2006-11-22 | 2007-11-21 | 鞍钢集团耐火材料公司 | Narrow slit type air brick capable of increasing blow-opening ratio |
| CN201942701U (en) * | 2011-01-20 | 2011-08-24 | 杨红 | Cluster-type bottom air supply element used for top-bottom combined blowing of converter |
Non-Patent Citations (2)
| Title |
|---|
| 《特殊钢》 19991231 贺智勇 18t电弧炉底吹用透气砖的研制 , * |
| 贺智勇等: "18t电弧炉底吹用透气砖的研制", 《特殊钢》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560009A (en) * | 2012-01-16 | 2012-07-11 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN102560009B (en) * | 2012-01-16 | 2014-11-26 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN102643952A (en) * | 2012-04-28 | 2012-08-22 | 东北大学 | Method for obtaining slot length and width of bottom powder injection element of ladle |
| CN102643952B (en) * | 2012-04-28 | 2014-06-04 | 东北大学 | Method for obtaining slot length and width of bottom powder injection element of ladle |
| CN104611511A (en) * | 2015-02-02 | 2015-05-13 | 西安宝科流体技术有限公司 | Intelligent argon bottom-blowing powder spraying control system of coreless induction furnace and control method thereof |
| CN110205444A (en) * | 2019-06-14 | 2019-09-06 | 钢铁研究总院 | A kind of circular seam type bottom blowing gas-feeding brick |
| CN110205444B (en) * | 2019-06-14 | 2021-01-05 | 钢铁研究总院 | Circular seam type bottom blowing air supply brick |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102296146B (en) | 2013-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102296146B (en) | Metal slit-type ladle bottom blowing powder injection apparatus | |
| CN101348845B (en) | Method for smelting titanium slag with electric stove | |
| CN107502702B (en) | A kind of purifying quick smelting process of full steel scrap electric arc furnaces | |
| KR102545826B1 (en) | Cooling elements for a metallurgical furnace, and method of manufacturing same | |
| CN103993116B (en) | Double tower flash iron-smelting furnace and iron smelting method | |
| CN212350352U (en) | Steel ladle structure | |
| CN101530904A (en) | Composite material hammerhead of crusher and negative pressure casting method thereof | |
| CN102503461A (en) | Submerged argon blowing nozzle for continuously casting metals and preparation method thereof | |
| CN102274958B (en) | Frustum slit type anti-blocking ladle bottom-blown powder injection device | |
| CN110117751B (en) | Wear-resistant corrosion-resistant bimetal composite pipe material and preparation method thereof | |
| CN102296156B (en) | Ladle bottom blowing power injection device with whirlwind-type flow-smoothing gas storage chamber | |
| CN113188326B (en) | Impact-resistant copper melting shaft furnace | |
| CN205526168U (en) | Metal melting is with swift current steel bay | |
| CN210916131U (en) | Novel composite iron notch structure | |
| CN104449864B (en) | A kind of novel water-coal-slurry pressurized-gasification furnace nozzle and manufacture method thereof | |
| CN204224552U (en) | The liquid continuous discharging slag device of fixed-bed gasification furnace | |
| CN212199310U (en) | Furnace wall structure of blast furnace hearth | |
| CN103993127B (en) | A kind of oxygen lance blow head with concentrated a fluid stream | |
| CN204276850U (en) | A kind of ceramic-metal composite material preparation facilities | |
| CN207998619U (en) | A kind of throttle-type main trough of blast furnace heat shield | |
| KR101511178B1 (en) | Method for the pyrometallurigical treatment of metals, molten metals, and/or slags | |
| CN212610746U (en) | Material accelerator for mineral powder conveying pipeline in smelting reduction process | |
| CN110342844A (en) | A kind of automatic discharge gas gathering system being used to prepare high potential activity yellow phosphorus furnace slag | |
| CN106480326B (en) | Lateritic nickel ore open hearth smelting device and method | |
| CN219572642U (en) | Movable horizontal furnace device for preparing smelting tantalum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |