CN1413944A - Electric melting production method of silicon micropowder and zirconium compound silicon micropowder - Google Patents
Electric melting production method of silicon micropowder and zirconium compound silicon micropowder Download PDFInfo
- Publication number
- CN1413944A CN1413944A CN 02115546 CN02115546A CN1413944A CN 1413944 A CN1413944 A CN 1413944A CN 02115546 CN02115546 CN 02115546 CN 02115546 A CN02115546 A CN 02115546A CN 1413944 A CN1413944 A CN 1413944A
- Authority
- CN
- China
- Prior art keywords
- silicon powder
- sio
- carbonaceous reducing
- reducing agent
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 54
- 229910052710 silicon Inorganic materials 0.000 title claims description 20
- 239000010703 silicon Substances 0.000 title claims description 20
- 238000002844 melting Methods 0.000 title claims description 16
- 230000008018 melting Effects 0.000 title claims description 16
- 150000003755 zirconium compounds Chemical class 0.000 title 1
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 46
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 21
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000006004 Quartz sand Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000010298 pulverizing process Methods 0.000 claims abstract description 3
- 239000003595 mist Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 14
- 239000000571 coke Substances 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 11
- 238000010891 electric arc Methods 0.000 claims description 11
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 10
- 229910052726 zirconium Inorganic materials 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 230000002829 reductive effect Effects 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000007499 fusion processing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 239000003500 flue dust Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000006253 pitch coke Substances 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 abstract description 6
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 201000010001 Silicosis Diseases 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910021488 crystalline silicon dioxide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
Abstract
A process for preparing superfine Si powder and Zr compounded Si powder by electric smelting includes such steps as pulverizing quartz sand (or zircon sand) and carbon reducer, proportional mixing, gradually smelting in arc furnace to decompose raw materials to SiO2 and CO gases, which are oxidized by air to become amorphous superfine SiO2 powder and CO2, cooling and collecting. It can be used for ceramics and unshape refractory.
Description
(1) the present invention relates to a kind of refractory materials production method, particularly relate to the electric melting production method of a kind of silicon powder and zirconium comprehensive silicon micro mist.
(2) background technology: generally particle diameter is called micro mist less than the molecule of 0.5 μ m, and the average particle size of silicon powder is less than 0.15 μ m, because its specific surface area is big, the surfactivity height, add silicon powder in pottery and refractory materials, its performance improves greatly, thereby draws attention.
Pair product when silicon powder generally is smelting ferrosilicon or smelting metal silicon, the someone is referred to as the silicon ash, claims condensation SiO again
2Ash, or claim active SiO
2Powder etc.It is to be formed by the SiO oxidation of gas phase and oxygen reaction postprecipitation, belongs to amorphous Si O
2(non-crystalline state) generally can not generate crystalline SiO
2, the silicon ash is the dust that can breathe, with the SiO of crystal form
2Compare, make the people get the dangerous less of silicosis, so proper operation or storege silicon ash are harmless.
Micro mist can promote the sintering of pottery and fire resistive material product and improve its performance.China uses micro mist to start from the phase at the end of the eighties in last century in pottery and refractory materials fairly largely.Because the research and development of hi-tech mould material and apply a kind of atypic SiO
2Also claim the beginning of silicon ash in atypic refractory materials, to widely apply, in using, it finds, after the silicon ash adds mould material, can reduce the consumption of water greatly, can increase substantially simultaneously the intensity and the density of mould material, many performances that can make mould material under certain condition are equally matched with the performance with the burnt product of material, and the silicon ash is the sintering temperature that silicon powder can be used for reducing the special refractories goods in addition.Silicon powder is used the application that also promotes other micro mist, as Al
2O
3, SiC, magnesium-aluminium spinel, ZrSiO
4, ZrO
2Deng micro mist.In view of the application of silicon powder enlarges day by day, pay product by what smelting ferrosilicon and Pure Silicon Metal were given birth to, silicon ash output does not satisfy wide market demand far away, in the practical application of micro mist, it is found that to work as in the silicon powder and contains 5～6% cubes of ZrO
2During micro mist, not only can not influence the good performance of silicon powder, but also most of refractory castablies are played good modifying function, because cube ZrO
2Intervention, can improve refractoriness, resistance to fouling and high high-temp stability.Zirconium comprehensive silicon micro mist has its great vitality, and it is of many uses, acts on greatly, and the specialized production method of producing silicon powder and zirconium comprehensive silicon micro mist of research is significant and is worth.
(3) summary of the invention: the objective of the invention is: the electric melting production method that a kind of silicon powder and zirconium comprehensive silicon micro mist are provided.
Technical scheme of the present invention is: a kind of electric melting production method of silicon powder, contain the liquation medium at the electric arc furnace bottom, with the weight part is example, contains about 80 parts of quartz sand, about 20 parts of carbonaceous reducing agent, with the raw material pulverizing mixing, gradation drops in the electric arc furnace, the fusing of heating of switching on, and melting makes the material reduction decomposition, generate SiO and CO gas, be oxidized to unsetting SiO by airborne oxygen again
2Silicon powder and CO
2, start the cooling dust collection device simultaneously, collect silicon powder.
Material in the liquation medium can be the zircon raw ore feed liquid of fusing, or zirconium white feed liquid for melting, or zircon sand feed liquid for melting, quartz sand powder and the carbon also granularity of agent material are about about 1mm, quartz sand powder and carbonaceous reducing agent are done and were mixed about 35～50 minutes, per hundred parts of weight dry blends, doing the water that the mixed later stage sprays into 1～2 part, carried out wet mixing about 5～10 minutes, every in process of production input 100 weight part compounds, add the block carbon reductive agent of about 10 weight parts again, carbonaceous reducing agent can be Graphite Electrodes, refinery coke, pitch prill Jiao, charcoal, coke etc., solid-state SiO in fusion process
2Fast and the carbonaceous reducing agent association reaction, generate SiO and CO gas, and react with airborne oxygen after the air mixed, generate unsetting SiO immediately
2And CO
2Deng mixed flue gas, enter cooling stack cooling, temperature is reduced to 150 ℃ from 200 ℃, enters the settling pocket of tornado dust collector, isolates oarse-grained flue dust, less than silicon powder and the CO of 3 μ m
2Enter cooling stack Deng again and further lower the temperature, temperature is reduced to about 100 ℃ and is entered 1～10 pocket type silicon powder collector in parallel, and filter is the following silicon powder of 3 μ m down, and residual gas enters in the atmosphere.
With the weight part is example, zircon sand 80-90 part, 20～10 parts of carbonaceous reducing agents, earlier above-mentioned siccative is pulverized, mixing, gradation drops in the electric arc furnace, the energising fusing of heating, melting make its material fast restore decompose flue gases such as generating SiO and CO, generate unsetting SiO with air mixed behind the arrival fire door
2Silicon powder and CO
2, start the cooling dust collection equipment simultaneously, collect silicon powder.
About zircon and the about 1mm of carbonaceous reducing agent grinding particle size, zircon powder and carbonaceous reducing agent are done the latter stage that mixed 35～50 minutes, the compound of per hundred weight parts sprays into the water of 1～2 part of weight, carried out wet mixing 5～10 minutes, the compound of per in process of production hundred weight parts drops into the piece carbonaceous reducing agent of about 10 weight parts again, carbonaceous reducing agent can be Graphite Electrodes, refinery coke, pitch coke, charcoal, coke etc., solid-state SiO in fusion process
2Fast and the carbonaceous reducing agent combination, generate SiO and CO gas, and and the unsetting SiO of airborne oxygen reaction generation
2Silicon powder and CO
2, enter cooling stack cooling cooling, reduce to 150 ℃ from about 200 ℃, enter the settling pocket of tornado dust collector, isolate macrobead dirt ash, remaining SiO less than 3 μ m
2Silicon powder and CO
2Enter the cooling stack cooling again and be cooled to about 100 ℃, enter 1～10 road bag filter, filter is the following silicon powder of 3 μ m down, and remaining flue gas enters in the atmosphere, contains ZrO in silicon powder
2Account for 5～6%, unsetting SiO
2Silicon powder 〉=90%.
For containing ZrO
2Zircon sand greater than 60% and carbonaceous reducing agent weight part ratio are about 90 and 10 parts, for low-grade zircon sand, ZrO
2Content is about 80 and 20 parts in 20%～30% zircon sand and carbonaceous reducing agent weight part proportioning.
The positively effect that the present invention is useful:
(1) simple with electric smelting method production silicon powder and zirconium comprehensive silicon micro mist production method, easily to go, cost is lower.
(2) with quartz sand direct production silicon powder, raw material sources are very abundant, and cost is low, can improve silicon powder output by a relatively large margin, satisfies market demand.
(3) produce zirconium comprehensive silicon micro mist for the comprehensive utilization national resources with low-grade zircon, have realistic meaning, and open up new markets for low-grade zircon.
(4) embodiment:
Embodiment one, electric arc furnace is ready to, graphite electrode slab or coke briquette treadle-operated tilt hammer for hulling rice that the starting the arc is used are built around electrode, elder generation drops into 50～70 kilograms low-grade zircon sand powder in the electric arc furnace one by one, voltage 110V, electric current 5000A, energising is heated and is fused into the liquation medium, get 800 kilograms of quartz sands, 200 kilograms of carbonaceous reducing agents, with refinery coke or coke, quartz sand and carbonaceous reducing agent are pulverized, its granularity is about 1mm, after then two kinds of batchings being done mixed 40 minutes in V-Mixer, spray into 15 kg of water again and continue wet mixing 5～10 minutes, compound with quartz sand powder and carbonaceous reducing agent particulate material mixing drops in the electric arc furnace one by one, and starting induced draft fan and by the dust collection device of 10 pocket types in parallel, quartz sand in electric arc furnace and carbonaceous reducing agent interact to react and resolve into gasiform SiO and CO fast, the electric arc furnace fire door of ascending to heaven out, again with air mixed after and airborne oxygen generation oxidizing reaction, in the process of its reduction reaction, add the carbonaceous reducing agent piece of about 10 parts of weight again by 100 parts of weight compounds.Generate unsetting SiO
2Silicon powder and CO
2, and entering by water-cooled pipeline, temperature is reduced to about 150 ℃ from 200 ℃ approximately, introduces the settling pocket of tornado dust collector, greater than the sedimentation in settling pocket of the above particle of 3 μ m.Contain 3 μ m following silicon powder and CO
2Enter again by water-cooled pipeline continuation cooling Deng gas, temperature is reduced to about 100 ℃, and be introduced in 10 bag filters in parallel this moment, and filter is the silicon powder below the 3 μ m down, and the residue flue gas enters in the atmosphere.
The electric melting production method of embodiment two, zirconium comprehensive silicon micro mist is got batching, low-grade zircon, 900 kilograms, 100 kilograms of carbonaceous reducing agents are pulverized to granularity 1mm left and right sides particle, are mixed in the V-type machine 30 minutes, production method is except that need not introducing the liquation medium, and other does not repeat with embodiment one.According to aforementioned production method, obtainable zirconium comprehensive silicon micro mist contains following composition, sees Table.
Claims (5)
1. the electric melting production method of a silicon powder, it is characterized in that: contain the liquation medium at the electric arc furnace bottom, with the weight part is example, contains about 80 parts of quartz sand, about 20 parts of carbonaceous reducing agent, with the raw material pulverizing mixing, gradation drops in the electric arc furnace, the fusing of heating of switching on, and melting makes the material reduction decomposition, generate SiO and CO gas, be oxidized to unsetting SiO by airborne oxygen again
2Silicon powder and CO
2, start the cooling dust collection device simultaneously, collect silicon powder.
2. generation method according to claim 1, it is characterized in that: the material in the liquation medium can be the zircon raw ore feed liquid of fusing, or zirconium white feed liquid for melting, or zircon sand feed liquid for melting, quartz sand powder and the carbon also granularity of agent material are about about 1mm, quartz sand powder and carbonaceous reducing agent are done and were mixed about 35～50 minutes, per hundred parts of weight dry blends, doing the water that the mixed later stage sprays into 1～2 part, carried out wet mixing about 5～10 minutes, every in process of production input 100 weight part compounds add the block carbon reductive agent of about 10 weight parts again, carbonaceous reducing agent can be Graphite Electrodes, refinery coke, pitch prill Jiao, charcoal, coke etc., solid-state SiO in fusion process
2Fast and the carbonaceous reducing agent association reaction, generate SiO and CO, and react with airborne oxygen after the air mixed, generate unsetting SiO immediately
2And CO
2Deng mixed flue gas, enter cooling stack cooling, temperature is reduced to 150 ℃ from 200 ℃, enters the settling pocket of tornado dust collector, isolates oarse-grained flue dust, less than silicon powder and the CO of 3 μ m
2Enter cooling stack Deng again and further lower the temperature, temperature is reduced to about 100 ℃ and is entered 1～10 pocket type silicon powder collector in parallel, and filter is the following silicon powder of 3 μ m down, and residual gas enters in the atmosphere.
3. the electric melting production method of a zirconium comprehensive silicon micro mist, it is characterized in that: be example with the weight part, zircon sand 80-90 part, 20～10 parts of carbonaceous reducing agents are pulverized above-mentioned siccative mixing earlier, gradation drops in the electric arc furnace, the energising fusing of heating, melting make its material fast restore decompose flue gases such as generating SiO and CO, generate unsetting SiO with air mixed behind the arrival fire door
2Silicon powder and CO
2, start the cooling dust collection equipment simultaneously, collect silicon powder.
4. production method according to claim 3, it is characterized in that: about zircon and the about 1mm of carbonaceous reducing agent grinding particle size, zircon powder and carbonaceous reducing agent are done the latter stage that mixed 35～50 minutes, the compound of per hundred weight parts sprays into the water of 1～2 part of weight, carried out wet mixing 5～10 minutes, the compound of per in process of production hundred weight parts drops into the piece carbonaceous reducing agent of about 10 weight parts again, and carbonaceous reducing agent can be Graphite Electrodes, refinery coke, pitch coke, charcoal, coke etc., solid-state SiO in fusion process
2Fast and the carbonaceous reducing agent combination, generate SiO and CO gas, and and the unsetting SiO of airborne oxygen reaction generation
2Silicon powder and CO
2, enter cooling stack cooling cooling, reduce to 150 ℃ from about 200 ℃, enter the settling pocket of tornado dust collector, isolate macrobead dirt ash, remaining SiO less than 3 μ m
2Silicon powder and CO
2Enter the cooling stack cooling again and be cooled to about 100 ℃, enter 1～10 road bag filter, filter is the following silicon powder of 3 μ m down, and remaining flue gas enters in the atmosphere, contains ZrO in silicon powder
2Account for 5～6%, unsetting SiO
2Silicon powder 〉=90%.
5. according to claim 3 or 4 described production methods, it is characterized in that: for containing ZrO
2Zircon sand greater than 60% and carbonaceous reducing agent weight part ratio are about 90 and 10 parts, for low-grade zircon sand, ZrO
2Content is about 80 and 20 parts in 20%～30% zircon sand and carbonaceous reducing agent weight part proportioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115546 CN1241869C (en) | 2002-02-07 | 2002-02-07 | Electric melting production method of silicon micropowder and zirconium compound silicon micropowder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115546 CN1241869C (en) | 2002-02-07 | 2002-02-07 | Electric melting production method of silicon micropowder and zirconium compound silicon micropowder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1413944A true CN1413944A (en) | 2003-04-30 |
| CN1241869C CN1241869C (en) | 2006-02-15 |
Family
ID=4743722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02115546 Expired - Lifetime CN1241869C (en) | 2002-02-07 | 2002-02-07 | Electric melting production method of silicon micropowder and zirconium compound silicon micropowder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1241869C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938922A (en) * | 2017-04-06 | 2017-07-11 | 新密市中建耐火材料厂 | Silicon steel jade abrasive brick |
| CN106938923A (en) * | 2017-04-06 | 2017-07-11 | 新密市中建耐火材料厂 | The beautiful wear-resisting composite brick of silicon steel |
| CN114907072A (en) * | 2022-05-24 | 2022-08-16 | 中建八局检测科技有限公司 | Plateau tunnel shotcrete and preparation method thereof |
-
2002
- 2002-02-07 CN CN 02115546 patent/CN1241869C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938922A (en) * | 2017-04-06 | 2017-07-11 | 新密市中建耐火材料厂 | Silicon steel jade abrasive brick |
| CN106938923A (en) * | 2017-04-06 | 2017-07-11 | 新密市中建耐火材料厂 | The beautiful wear-resisting composite brick of silicon steel |
| CN106938922B (en) * | 2017-04-06 | 2020-07-24 | 郑州中建耐火材料有限公司 | Silicon corundum abrasive brick |
| CN106938923B (en) * | 2017-04-06 | 2020-07-24 | 郑州中建耐火材料有限公司 | Silicon corundum wear-resistant composite brick |
| CN114907072A (en) * | 2022-05-24 | 2022-08-16 | 中建八局检测科技有限公司 | Plateau tunnel shotcrete and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1241869C (en) | 2006-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108359814B (en) | Antimony sulfide gold ore oxygen-enriched molten pool smelting method | |
| CN101746765B (en) | Method and device for separating and purifying active silica micropowder from electric furnace smoke dust | |
| CN107285747B (en) | Production process of corundum-zirconia abrasive | |
| CN105695731B (en) | Rotary kiln produces ferronickel fine powder and the method for zinc oxide | |
| CN108677025A (en) | The method that titanium-containing blast furnace slag carries titanium | |
| CN101792179A (en) | Production method of electrically melt yttrium oxide stabilized zirconia granulation powder | |
| CN101684524A (en) | Method and device for preparing magnesium metal by carbothermic reduction | |
| CN1246489C (en) | Method for recovering germanium from germanium-extracting coal slag | |
| CN108017064B (en) | Method and device for impurity removal and activation of industrial silicon micro-silicon powder | |
| CN1241869C (en) | Electric melting production method of silicon micropowder and zirconium compound silicon micropowder | |
| CN111057810B (en) | Method for removing impurity iron in gasified slag | |
| CN111074076B (en) | Comprehensive utilization system and method for metallurgical solid waste | |
| JP2002105550A (en) | Method for zinc recovery | |
| CN100441709C (en) | Method of refining noble lead or dore silver | |
| JP3839431B2 (en) | Method for recovering platinum group metals | |
| CN110980753B (en) | Process for producing high-quality sodium silicate by adopting high-silicon iron ore | |
| CN100387546C (en) | Method for preparing alumine base electric fused zirconium corundum | |
| CN112499658A (en) | Treatment method of aluminum electrolysis waste carbon slag and obtained regenerated cryolite | |
| JP2001098339A (en) | Method of producing vanadium alloy iron and vanadium alloy steel | |
| CN108118235A (en) | A kind of method with silicon carbide smelting ferrosilicon | |
| CN116409987B (en) | Value-added utilization method of calcium molybdate-containing slag | |
| CN201296664Y (en) | Apparatus for separating and purifying silica micro powder from electric furnace flue dust | |
| RU2747988C1 (en) | Method for production of silicon carbide | |
| CN206385035U (en) | The system for preparing mullite vagcor multiple phase refractory material | |
| JPS6278114A (en) | Production of zirconia powder |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060215 Termination date: 20110207 |
|
| CI01 | Publication of corrected invention patent application |
Correction item: cessation of patent right due to non-payment of the annual fee Correct: Revocation of the patent right False: Patent right to terminate Number: 16 Volume: 28 |
|
| ERR | Gazette correction |
Free format text: CORRECT: CESSATION OF PATENT RIGHT DUE TO NON-PAYMENT OF THE ANNUAL FEE; FROM: CESSATION OF PATENT RIGHT DUE TO NON-PAYMENT OF THE ANNUAL FEE TO: REVOCATION CESSATION OF PATENT RIGHT DUE TO NON-PAYMENT OF THE ANNUAL FEE |
|
| ASS | Succession or assignment of patent right |
Owner name: ZHENGZHOU ZHENZHONG FUSED NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: ZHENGZHOU ZHENZHONG ELECTRIC ZIRCONIUM MELTING INDUSTRY CO., LTD. Effective date: 20140504 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140504 Address after: Xinmi City, Henan province 452384 small Liu Zhaicun Gou Town Hall Patentee after: ZHENGZHOU ZHENZHONG FUSED ZIRCONIA CO.,LTD. Address before: 888 mailbox 452384, Henan City, Xinmi Province Patentee before: Zhengzhou Zhenzhong Fused Zirconia Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20060215 |
|
| CX01 | Expiry of patent term |