CN109468461A - High silicon silicozirconium and its production method - Google Patents
High silicon silicozirconium and its production method Download PDFInfo
- Publication number
- CN109468461A CN109468461A CN201811379617.3A CN201811379617A CN109468461A CN 109468461 A CN109468461 A CN 109468461A CN 201811379617 A CN201811379617 A CN 201811379617A CN 109468461 A CN109468461 A CN 109468461A
- Authority
- CN
- China
- Prior art keywords
- area
- furnace
- aniseed
- silicozirconium
- high silicon
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/06—Alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Silicon Compounds (AREA)
- Furnace Details (AREA)
Abstract
The present invention proposes a kind of high silicon silicozirconium, contained elemental composition and ratio are as follows: Si:81-95%, Zr:1-5%, Ca:1-3%, Al < 1.5%, C < 0.3, S < 0.05, P < 0.02, also propose a kind of production method of high silicon silicozirconium, including entering furnace preheating step are as follows: it is described enter furnace preheating step in the intracorporal electrode of furnace radius be r, the circumference range of one r of outer wall apart from each electrode is small powder area, circumference range apart from one r in small powder area is aniseed area, the range of aniseed area to sidewall of the furnace body is cold burden area, cold burden area, aniseed area, the temperature in small powder area successively increases, when every batch of mixed material is put into furnace body, the position of investment is close to aniseed area and cold burden area intersection, the present invention, enter the position in furnace bath by controlling material And opportunity, the temperature of each position in molten bath is made full use of, thermal loss can not only be avoided to waste, and carries out the lower preheating of temperature in advance to the material of entrance, so that excessive temperature differentials be avoided to cause the impact to thermal field, electrode.
Description
Technical field
The present invention relates to alloy smelting technology field more particularly to a kind of high silicon silicozirconium and its production methods.
Background technique
High silicon silicozirconium is new using a kind of ferroalloy different from common silicozirconium of mineral hot furnace carbothermy production
Product.As silicon systems inovulant, the high pregnant effect of silicon content is good, and homogeneity of fault plane is good, and thickness surface hardness difference is small.Zirconium is very strong
Carbide former, increase austenitic substrate, refine crystal grain, to improve cast iron intensity.
The content of silicon is 70-80%, the raising of high silicon systems column Silicon In Alloys content in the silicozirconium produced in the prior art
It is the Pinch technology of the production technology, how produces high silicon silicozirconium and impurity content control therein is made to be to lower
The problem of industry always exists.
Summary of the invention
It is necessary to propose a kind of high silicon silicozirconium.
It there is a need to propose a kind of production method of high silicon silicozirconium.
A kind of high silicon silicozirconium, contained elemental composition and ratio are as follows: Si:81-95%, Zr:1-5%, Ca:1-3%, Al <
1.5%、C <0.3、S<0.05、P<0.02。
A kind of production method of high silicon silicozirconium, including enter furnace preheating step, the mixed material enters furnace preheating step
Suddenly are as follows:
The radius of the intracorporal electrode of furnace is r, and the circumference range of one r of outer wall apart from each electrode is small powder area, apart from small powder
The circumference range of two r in area is aniseed area, and the range in aniseed area to sidewall of the furnace body is cold burden area, cold burden area, aniseed area, small powder area
Temperature successively increase, when every batch of mixed material is put into furnace body, the position of investment is to have a common boundary close to aniseed area and cold burden area
Place.
The present invention enters the position in furnace bath and opportunity by controlling material, makes full use of each position in molten bath
Temperature can not only avoid thermal loss from wasting, and carry out the lower preheating of temperature in advance to the material of entrance, to avoid
Thermal loss caused by excessive temperature differentials and the impact to thermal field, electrode.
The high silicon silicozirconium of product of the invention is mainly used as inovulant during Castiron Melting.
Detailed description of the invention
Fig. 1 is the top view of mineral hot furnace furnace body.
In figure: furnace body 10, electrode 20, small powder area 21, aniseed area 22, cold burden area 23, trigonum 24, feeder pipe 30.
Specific embodiment
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, common for this field
For technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Referring to Fig. 1, the embodiment of the invention provides a kind of high silicon silicozirconium, contained elemental composition and ratio are as follows: Si:
81-95%, Zr:1-5%, Ca:1-3%, Al < 1.5%, C < 0.3, S < 0.05, P < 0.02.
Further, contained elemental composition and ratio are as follows: Si:81-85%, Zr:3-5%, Ca:2-3%, Al < 1.5%, C <
0.3、S<0.05、P<0.02。
Further, contained elemental composition and ratio are as follows: Si:85-90%, Zr:2.5-3.5%, Ca:2-3%, Al < 1.5%, C
<0.3、S<0.05、P<0.02。
Further, contained elemental composition and ratio are as follows: Si:90-95%, Zr:1-2%, Ca:1-2%, Al < 1%, C < 0.2, S
<0.04、P<0.02。
The present invention also proposes a kind of production method of high silicon silicozirconium, and mixed material enters furnace preheating step are as follows:
The radius of electrode 20 in furnace body 10 is r, and the circumference range of one r of outer wall apart from each electrode 20 is small powder area 21,
Circumference range apart from 21 1 r in small powder area is aniseed area 22, and the range in aniseed area 22 to 10 side wall of furnace body is cold burden area 23, cold
Material area 23, aniseed area 22, small powder area 21 temperature successively increase, every batch of mixed material put into furnace body 10 in when, the position of investment
It is set to close to 23 intersection of aniseed area 22 and cold burden area.
Cold burden area 23, aniseed area 22, small powder area 21 temperature successively about less than 600 DEG C, be greater than 800 DEG C, be greater than 1000
DEG C, and the pool depth of furnace body 10 be 2-2.3 meter, below bath surface 1-2 meters of position for the highest high temperature of temperature also
Former area.
Since extraneous mixed material is cold burden, temperature is very low, direct plunges into furnace, it cannot be guaranteed that it puts into position, if
Investment is to small powder area 21, then cold burden is contacted with small powder area 21, and temperature spread is larger, material contact small powder area 21 to small powder area
The fusion of 21 temperature, this process make many heats in small powder area 21 for first being preheated to cold burden, reheating melting, small powder area
21 these heats for preheating are depleted waste because that cannot melt to material, more serious cold burden and small powder area 21
Temperature spread is larger, forms cooling thermal impact, not only influences the uniformity of thermal field, but also is easy to cause low temperature to rush at electrode 20
It hits, accelerates the loss of electrode 20, stress damage is caused to electrode 20 or furnace body 10, influences 10 service life of electrode 20 or furnace body.
So the present invention, when entering furnace, control cold burden is fallen into 23 intersection of aniseed area 22 and cold burden area, and temperature is about herein
It is 600-700 DEG C, in this way, falling into the temperature difference that can reduce cold burden and thermal field herein, the cold burden utilization fallen into herein is lower herein
Temperature is preheated in advance, is reduced material and is entered the temperature difference in aniseed area 22, small powder area 21, impact caused by avoiding because of the temperature difference, with
It prepares to be subsequent to the higher aniseed area 22 of temperature, small powder area 21, high temperature reduction area.
Further, pusher heating reduction step, the pusher heating reduction step are set also before entering furnace preheating step
Are as follows: the mixed material of 23 intersection of Lu Nei aniseed area 22 and cold burden area is had been put into into aniseed area 22, small powder in last batch
Push, so that this batch of mixed material sequentially enters aniseed area 22, small powder area 21, it is successively secondary in aniseed area 22, small powder area 21
Preheating, heating melting are reduced, and are entered furnace for next batch mixed material and vacated and returned space.
It falls into the material of 23 intersection of aniseed area 22 and cold burden area and is once preheated, the material to small powder area 21, which becomes, to be closed
Golden liquid, when flowing downward and charge level being caused to sink, at this point, slowly pushing in aniseed area 22 through the material of secondary preheating
To small powder area 21, the material fallen into once being preheated of 23 intersection of aniseed area 22 and cold burden area is then pushed into aniseed area
22, continue supplement plus cold burden to aniseed area 22 and cold burden area 23, in aniseed area 22 by the material after secondary preheating in small powder area 21
It through high-temperature fusion, then flows downward in small powder area 21, into the highest high temperature reduction area of temperature, carries out reduction reaction, at
For alloy liquid,.
The present invention realize to the material of pan feeding carry out temperature primary preheating from low to high, secondary preheating, heat up melt,
High temperature reduction.
Further, the electrode 20 in furnace body 10 is three, is connected between each of three electrodes 20 using triangle, three electricity
The region formed between pole 20 is trigonum 24, and the temperature of trigonum 24 is higher than the temperature in small powder area 21, above trigonum 24
Individual feeder pipe 30 is set, to be individually fed for trigonum 24 or change extention furnace charge according to the working of a furnace.
It is formed since trigonum 24 is surrounded there are three electrode 20, temperature is higher than the temperature in small powder area 21, and this trigonum
24 region areas are smaller, cause herein material melting speed it is fast, it is fast to form aluminium alloy speed, also high temperature reduction area just downwards
The speed of flowing is also fast, and the sagging speed of liquid level is fast, and the liquid level of this trigonum 24 is caused to be lower than small powder area 21 or other region liquid levels,
And this trigonum 24 is exactly the higher region of temperature, after liquid level sink, the heat put aside herein is very much, if mended not in time
Material, cause herein heat cannot be sufficiently used for melting materialss, so that enrichment be caused to waste, more seriously, high temperature herein with
The temperature difference in the small powder area 21 in outside can cause temperature difference scaling loss to electrode 20, so, feeder pipe 30 is separately provided in trigonum 24 thus,
Think and material is replenished in time herein, heat herein is sufficiently used for melting materialss, and not only heat will not waste, also can be to plan
The material put into aniseed area 22 and 23 intersection of cold burden area is shared, and enters the furnace time so as to shorten material, it is molten to reduce material
Change unit consumption, reduces cost.
Further, the whereabouts mode of material is a small amount of, multiple, discontinuous in the feeder pipe 30.
A small amount of amount for single blanking is not more than 10kg, is repeatedly no less than 3 times for the number of single blanking, discontinuous is phase
Adjacent blanking time interval twice is not less than 5min.
Further, further include batching step before being set to furnace preheating, the step of the ingredient are as follows: according to each raw material
Shared quality specific gravity is silica 2600kg: conduction and reducing material 1700kg: zircon 85kg: the ratio of lime stone 70kg is matched
Material, wherein dioxide-containing silica is 98% or more in silica, and zirconia content is not less than 65% in zircon, carbonic acid in lime stone
Calcium content is not less than 95%.
Further, the conductive and reducing material is the semi-coke and bituminous coal mixed material that ratio is 1:1-3:5.
Wherein, the fixed carbon of semi-coke is higher, and calorific value is higher than bituminous coal, and chemical activity is also relatively strong, is conducive to reduction, the bituminous coal
Fugitive constituent is high, containing bonding materials such as tar, is conducive to material and bonds smoldering in furnace, reduce thermal loss, such as furnace body 10
The raising of internal bath temperature.
Further, the operation of the batching step are as follows: silica is broken for the big bulk of 90-140mm, conduction and also former material
Material is the small pellets of 8-18mm, and first silica is placed in blending bunker, then conductive and reducing material paving is spilt in silica surface, and
Silica and conduction and reducing material are stirred, so that conductive and reducing material is wrapped in silica surface.
Conductive and reducing material is wrapped in silica surface and forms conductive layer, enters in furnace in silica, and electrode 20 is powered, silicon in furnace
The materials such as stone constitute resistance, in order to make electrode 20 and bulk silica in furnace be heated sufficiently and melt, are wrapped in leading for silica surface
Electricity and reducing material can reduce the resistance of material, form conductive path, the electric current of electrode 20 formed with material logical
Road, and then promote material exothermic melting；
Since conductive and reducing material granularity is smaller relative to silica, when being mixed simultaneously with silica or other raw materials, little particle
Material be easy to sink in bottom, cause conductive and reducing material cannot uniformly wrap up and silica surface, also result in silica table
The resistance in face is uneven or resistance is larger, so, this programme using first by silica with conduction and reducing material mix after with
The mode of unclassified stores mixing, solves the above problem.
This programme controls the resistance of material in furnace by the proportion scale of control conduction and reducing material cannot be too small, and
The resistance of material is controlled by the way that conductive and reducing material is wrapped in silica surface cannot be too big, so that the fusing of material
Speed is in controllable state.
Silica is crushed into biggish bulk, and remaining raw material is lesser powder, and such bulk powders collocation uses, then
In addition conductive and reducing material is wrapped up in bulk silica surface, the resistance that can not only control material is suitable, it is even more important that
Bulk powders collocation uses, and while meeting that resistance is suitable in furnace body 10, the granularity and density of material are simultaneously not close closely knit,
Because close closely knit material is readily formed paste layer when being heated in furnace body 10, paste layer is easy to seal weld pool surface
It is stifled, hinder the discharge of the carbon monoxide generated to cause carbon content in aluminium alloy in this way, causing carbonaceous material that cannot be discharged in time
Higher, extra carbon can generate half fusants such as the heavier silicon carbide of specific gravity with pasc reaction, be sunken to aluminium alloy bottom as lower layer's slag blanket
Portion, and then remove.
And in the prior art, often there is the above problem, due to material particles size mix it is improper, there are paste layer,
Carbon monoxide discharge is blocked, causes carbon content high, generates silicon carbide, causes impurity content in silicozirconium high.
Further, further include coming out of the stove after being set to pusher heating reduction, slag making, casting step, step of coming out of the stove be
Furnace eye is arranged in 10 bottom of furnace body, and the aluminium alloy after high temperature reduction is expelled in ladle along furnace eye, and slag making step is that will make
Slag agent is sprinkled upon on the aluminium alloy surface along the discharge of furnace eye with stream, while to the oxygen blast of aluminium alloy bottom, thus the shape in ladle
At lower layer's slag blanket of the upper layer slag blanket and sedimentation and ladle bottom that float on surface, upper layer slag blanket is pulled out using slag rake
It removes, the casting step is that the aluminium alloy in the ladle for pulling out upper layer slag blanket is cast into mold, casting to ladle bottom
When lower layer's slag blanket in portion exposes, stops casting, and lower layer's slag blanket of ladle bottom is removed, slag blanket is avoided to enter in mold.
The ingredient of slag former includes dolomite dust, quartz sand, Fluorspar Powder, and upper layer slag blanket is the lighter calcium silicates etc. of specific gravity,
Lower layer's slag blanket is the high Melting Substances such as half fusant of silicon carbide.
When high temperature reduction, silica and zirconium oxide in raw material, which are reduced, generates elementary silicon and zirconium simple substance, after reduction
Oxygen element reacts generation carbon monoxide with carbon and is discharged, so that the probability of carbon and pasc reaction generation silicon carbide is reduced,
The content of impurity in aluminium alloy is reduced, to improve the content of silicon.
Module or unit in the device of that embodiment of the invention can be combined, divided and deleted according to actual needs.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention
Made equivalent variations is sought, is still belonged to the scope covered by the invention.
Claims (9)
1. a kind of high silicon silicozirconium, it is characterised in that contained elemental composition and ratio are as follows: Si:81-95%, Zr:1-5%, Ca:1-
3%、Al <1.5%、C <0.3、S<0.05、P<0.02。
2. a kind of production method of high silicon silicozirconium, it is characterised in that: including entering furnace preheating step, the mixed material enters
Furnace preheating step are as follows:
The radius of the intracorporal electrode of furnace is r, and the circumference range of one r of outer wall apart from each electrode is small powder area, apart from small powder
The circumference range of one r in area is aniseed area, and the range in aniseed area to sidewall of the furnace body is cold burden area, cold burden area, aniseed area, small powder area
Temperature successively increase, when every batch of mixed material is put into furnace body, the position of investment is to have a common boundary close to aniseed area and cold burden area
Place.
3. the production method of high silicon silicozirconium as claimed in claim 2, it is characterised in that: also before entering furnace preheating step
Pusher heating reduction step, the pusher heating reduction step are set are as follows: Lu Nei aniseed area and cold is had been put into last batch
The mixed material of material area's intersection is pushed into aniseed area, small powder, so that this batch of mixed material sequentially enters aniseed area, small powder
Area is successively reduced by secondary preheating, heating melting in aniseed area, small powder area, and enters furnace for next batch mixed material and vacate and return
Space.
4. the production method of high silicon silicozirconium as claimed in claim 2, it is characterised in that: the intracorporal electrode of furnace is three,
It is connected between each of three electrodes using triangle, the region formed between each of three electrodes is trigonum, and the temperature of trigonum is high
Individual feeder pipe is arranged in temperature in small powder area above trigonum, convenient for being individually fed for trigonum or becoming according to the working of a furnace
Change extention furnace charge.
5. the production method of high silicon silicozirconium as claimed in claim 4, it is characterised in that: in the feeder pipe under material
Falling mode is a small amount of, multiple, discontinuous.
6. the production method of high silicon silicozirconium as claimed in claim 2, it is characterised in that: further include being set to preheat into furnace
The step of batching step before, the ingredient are as follows: according to quality specific gravity shared by each raw material be silica 2600kg: conductive and reduction
Material 1700kg: zircon 85kg: lime stone 70kg ratio ingredient, wherein dioxide-containing silica is 98% or more in silica,
Zirconia content is not less than 65% in zircon, and calcium carbonate content is not less than 95% in lime stone.
7. the production method of high silicon silicozirconium as claimed in claim 6, it is characterised in that: the conduction and reducing material are
Ratio is the semi-coke and bituminous coal mixed material of 1:1-3:5.
8. the production method of high silicon silicozirconium as claimed in claim 6, it is characterised in that: the operation of the batching step
Are as follows: silica is broken for the big bulk of 90-140mm, conductive and reducing material is the small pellets of 8-18mm, is first placed in silica
In blending bunker, then conductive and reducing material is spread and is spilt in silica surface, and silica and conduction and reducing material are stirred, with
Conductive and reducing material is set to be wrapped in silica surface.
9. the production method of high silicon silicozirconium as claimed in claim 3, it is characterised in that: further include being set to pusher heating
Coming out of the stove after reduction, slag making, casting step, step of coming out of the stove is that furnace eye is arranged in bottom of furnace body, by the alloy after high temperature reduction
Liquid is expelled in ladle along furnace eye, and slag making step is that slag former is sprinkled upon the aluminium alloy surface being discharged along furnace eye with stream
On, while to the oxygen blast of aluminium alloy bottom, it floats on the upper layer slag blanket on surface to be formed in ladle and falls to ladle
Lower layer's slag blanket of bottom pulls out upper layer slag blanket using slag rake, and the casting step is the iron that will pull out upper layer slag blanket
Aluminium alloy in water packet is cast into mold, when the lower layer's slag blanket cast to ladle bottom exposes, stops casting, and by molten iron
The lower layer's slag blanket for wrapping bottom is removed, and slag blanket is avoided to enter in mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811379617.3A CN109468461B (en) | 2018-11-20 | 2018-11-20 | High silicon-zirconium alloy and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811379617.3A CN109468461B (en) | 2018-11-20 | 2018-11-20 | High silicon-zirconium alloy and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109468461A true CN109468461A (en) | 2019-03-15 |
| CN109468461B CN109468461B (en) | 2021-05-14 |
Family
ID=65673060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811379617.3A Active CN109468461B (en) | 2018-11-20 | 2018-11-20 | High silicon-zirconium alloy and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109468461B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100402A (en) * | 1986-01-21 | 1987-08-12 | 埃尔凯姆金属公司 | The nucleating agent of graphitic cast iron |
| CN1072964A (en) * | 1991-12-02 | 1993-06-09 | 上海工业大学 | Intensive-graphitized alterant |
| CN1281513A (en) * | 1997-12-08 | 2001-01-24 | 埃尔凯姆公司 | Cast iron inoculant and method for production of cast iron inoculant |
| CN105238988A (en) * | 2015-10-30 | 2016-01-13 | 成都宏源铸造材料有限公司 | Preparing method and application of gray iron inoculant |
| CN106755704A (en) * | 2016-11-17 | 2017-05-31 | 石卫东 | Amorphous inovulant for CADI cast irons and preparation method thereof and application method |
| WO2018004356A1 (en) * | 2016-06-30 | 2018-01-04 | Elkem As | Cast iron inoculant and method for production of cast iron inoculant |
-
2018
- 2018-11-20 CN CN201811379617.3A patent/CN109468461B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100402A (en) * | 1986-01-21 | 1987-08-12 | 埃尔凯姆金属公司 | The nucleating agent of graphitic cast iron |
| CN1072964A (en) * | 1991-12-02 | 1993-06-09 | 上海工业大学 | Intensive-graphitized alterant |
| CN1281513A (en) * | 1997-12-08 | 2001-01-24 | 埃尔凯姆公司 | Cast iron inoculant and method for production of cast iron inoculant |
| CN105238988A (en) * | 2015-10-30 | 2016-01-13 | 成都宏源铸造材料有限公司 | Preparing method and application of gray iron inoculant |
| WO2018004356A1 (en) * | 2016-06-30 | 2018-01-04 | Elkem As | Cast iron inoculant and method for production of cast iron inoculant |
| CN106755704A (en) * | 2016-11-17 | 2017-05-31 | 石卫东 | Amorphous inovulant for CADI cast irons and preparation method thereof and application method |
Non-Patent Citations (4)
| Title |
|---|
| 付晓燕 等: "矿热炉料面的优化途径探讨", 《铁合金》 * |
| 熊谟远 编著: "《电石生产及其深加工产品》", 30 June 1989, 化学工业出版社 * |
| 胡凌标: "3200kVA电炉生产硅钙合金的实践及对大功率电炉生产硅钙的简要分析", 《铁合金》 * |
| 黄海胜 等: "16.5MVA电炉喷料爆炸的探讨与增产降耗的实践", 《铁合金》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109468461B (en) | 2021-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109249013A (en) | A kind of stuffing sand interstitital texture and plus sand technique for refining ladle | |
| CN104493150B (en) | A kind of alumina-silica drainage agent and preparation method thereof | |
| CN106435310B (en) | A kind of technique with grate ferrosilicon process refining manganese silico-aluminum | |
| JP2000513411A (en) | Hot metal manufacturing method | |
| CN103063030B (en) | A kind of modified compound stove of slag and operating procedure thereof | |
| CN108265175B (en) | The green reclaim method of noble metal in spent auto-catalysts | |
| US4697274A (en) | Electric melting furnace arrangement as well as a method of influencing the composition of a mineral melt for producing wool | |
| CN105940120B (en) | The method and electric arc furnaces of steel processed in electric arc furnaces | |
| JPH0146792B2 (en) | ||
| CN101403040B (en) | High lead-antimony slag type for anode slime smelting process and its use method | |
| CA1107515A (en) | Continuous smelting and refining of cement copper | |
| CN107500295A (en) | Smelting furnace | |
| CN109468461A (en) | High silicon silicozirconium and its production method | |
| US2217808A (en) | Method of converting furnace slag into glasslike composition | |
| JPH04263003A (en) | Method for operating blast furnace | |
| CN111780558B (en) | Continuous production device and production method for niobium-iron alloy | |
| CN203550604U (en) | Electro-magnetic induction slag smelting furnace bottom flow type flow-controllable electric heating graphite water gap device | |
| CN203478998U (en) | Underflow type anti-swirl central stopper rod nozzle for electro-magnetic induction slag smelting furnace | |
| CN103353234B (en) | Bottom flowing type coaxial electric heating core graphite water gap device of electromagnetic induction slag smelting furnace | |
| CN206069976U (en) | A kind of association type silicomangan production system | |
| CN203479012U (en) | Underflow type coaxial electric heating core graphite nozzle device for electro-magnetic induction slag smelting furnace | |
| US4307872A (en) | Apparatus for reducing ore | |
| CN102674870A (en) | High-density white corundum and preparation process thereof | |
| JPS59134482A (en) | Metallurgical method and low furnace | |
| JPH1114263A (en) | Metal melting furnace and metal melting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 753000 north of Shanshui Avenue and west of railway station, Shizuishan City, Ningxia Hui Autonomous Region Applicant after: Ningxia Lanhu New Material Technology Co.,Ltd. Address before: 753000 north of Shanshui Avenue and west of railway station in Dawukou District, Shizuishan City, Ningxia Hui Autonomous Region Applicant before: NINGXIA HELANSHAN METALLURGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |