CN101650120A - Reduction oxidation furnace for refining phosphorus by hot method - Google Patents
Reduction oxidation furnace for refining phosphorus by hot method Download PDFInfo
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- CN101650120A CN101650120A CN200910087961A CN200910087961A CN101650120A CN 101650120 A CN101650120 A CN 101650120A CN 200910087961 A CN200910087961 A CN 200910087961A CN 200910087961 A CN200910087961 A CN 200910087961A CN 101650120 A CN101650120 A CN 101650120A
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Abstract
The invention discloses a reduction oxidation furnace for refining phosphorus by a hot method, which comprises a furnace body and a blow gun, wherein the furnace body is provided with a slag outlet, asmoke outlet and a fusant inlet for adding molten phosphorus into the furnace; and one end of the blow gun is inserted in the furnace body. According to the reduction oxidation furnace for refining phosphorus by a hot method, impurities in flue gas containing phosphorus pentoxide are reduced, and the phosphorus pentoxide with high purity can be simply extracted at low cost.
Description
Technical field
The invention belongs to field of metallurgical equipment, especially relate to a kind of reduction oxidation furnace of refining phosphorus by hot method.
Background technology
Utilize the method for rock phosphate in powder refining phosphorus to mainly contain wet method and Re Fa (as electric furnace process, kiln method etc.) two classes, wet method is with rock phosphate in powder and inorganic acid (mainly being sulfuric acid) reaction, makes raw phosphoric acid behind separation of phosphogypsum and impurity; Hot method is earlier rock phosphate in powder to be added thermal reduction to obtain gaseous elemental phosphorus, obtains phosphoric acid through oxidation, hydration again.
Wet method has the characteristics of low energy consumption, but exists the phosphoric acid purity that obtains not enough, needs the defective of further purifying; And adopt hot method, as electric furnace process, there are ore fusion difficulty, problem that power consumption is big, and, can't handle for lean ore to the requirement height of rock phosphate in powder grade; For the kiln method, then there is the shortcoming of slow, the easy ring formation of reaction speed, cause utilization rate of equipment and installations low, be difficult to accomplish scale production.In addition, in the traditional hot method, the gaseous state phosphorus pentoxide after the oxidation is mixed in the flue gas, and therefore the complicated component of flue gas isolates the phosphorus pentoxide difficulty from flue gas, and purity reduces, the cost height.
Chinese patent application CN1160018A discloses a kind of thermal phosphoric acid and phosphating processes, this technology prepares the phosphoric acid technology with spraying metallurgy technology, melting and reducing technology and coal gas, element phosphor oxidizing fire and is combined as a whole, it is coal-oxygen-ore deposit composite blowing, under melting condition, finish the reduction of element phosphor and in same reactor, finish the oxidizing fire of element phosphor, and then produce phosphoric acid or phosphate.But there is following problem in above-mentioned technology:
Owing to carry out fusion, reduction and the oxidation of rock phosphate in powder simultaneously in same reactor, the flue gas that produces when flue gas that produces when causing fusion and reduction-oxidation is mixed in together, makes that the impurity component in the flue gas is many, extracts relatively difficulty of phosphorus pentoxide, and purity is low.
Because rock phosphate in powder sprays in the reduction-oxidation body of heater by the top blast rifle, therefore granularity requirements height, the cost for rock phosphate in powder increases.
Because the top blast rifle immerses below the slag liquid level, so the top blast rifle is serious because of the heat erosion consumable, and must increase top blast pressure.In addition, in a single day the top blast rifle that enters slag liquid level below is unsuitable for using water cooling, otherwise leaks, and water is blended in the slag, blasts easily, causes security incident.
Owing to be provided with the bottom blowing rifle that in melt, sprays coal dust and oxygen in the bottom of reduction oxidation furnace, therefore when changing the bottom blowing rifle, just can change rifle after melt being racked up after must blowing out and operate.
Owing to be provided with the flux inlet at the top of reduction oxidation furnace, in use need constantly to open and seal complicated operation, sealing difficulty.
Summary of the invention
The present invention is intended to overcome at least one of above-mentioned technical problem of the prior art.For this reason, the object of the present invention is to provide a kind of reduction oxidation furnace of refining phosphorus by hot method, utilize the reduction oxidation furnace of this refining phosphorus by hot method, the impurity component that contains in the flue gas of gaseous state phosphorus pentoxide is few, and the extraction of phosphorus pentoxide is easy, has reduced cost, has improved purity.
Reduction oxidation furnace according to refining phosphorus by hot method of the present invention comprises: body of heater and spray gun, wherein said body of heater has slag notch, exhanst gas outlet and is used for rock phosphate in powder melt with fusion and joins melt inlet in the body of heater, and an end of wherein said spray gun is inserted in the body of heater.
According to the reduction oxidation furnace of refining phosphorus by hot method of the present invention, owing to be that the melt that the rock phosphate in powder of fusion forms is joined in the body of heater.In other words, in body of heater, no longer carry out the fusion of rock phosphate in powder and directly the melt of fusion is reduced and oxidation, therefore the flue gas of the flue gas of phosphorus ore fusion generation and reduction and oxidation generation can not mix, so the impurity component that contains after the oxidation in the flue gas of gaseous state phosphorus pentoxide is few, the extraction of phosphorus pentoxide is easy, reduce cost, improved purity.Solved under the situation of carrying out fusion, reduction and oxidation reaction in same body of heater, the flue gas that flue gas that fusion produces and reduction-oxidation produce is mixed in together, causes the problem that extraction difficulty, purity are low, cost is high of phosphorus pentoxide.
In addition, because rock phosphate in powder is melted outside stove in advance, join in the body of heater by melt inlet then, therefore do not need to spray rock phosphate in powder with spray gun in body of heater, therefore low to the granularity requirements of rock phosphate in powder, cost reduces.
Reduction oxidation furnace according to refining phosphorus by hot method of the present invention also has following additional technical feature:
Described spray gun comprises top-blown spray gun and side-blown spray gun, the lower end of described top-blown spray gun is inserted into the slag liquid level top that is positioned at body of heater in the body of heater and all the time from the top of body of heater, an end of described side-blown spray gun is inserted in the body of heater from the side of body of heater and is positioned at the melt inlet below.
Because top-blown spray gun inserts in the body of heater from the top of body of heater and is positioned at the slag liquid level top of body of heater all the time, be that the lower end of top-blown spray gun is not immersed in the slag liquid level in the body of heater (thus, top-blown spray gun be called again " non-immersed top-blown spray gun); so top-blown spray gun can be because of the heat erosion consumable; can prolong top spray gun service life simultaneously; reduce cost; and top-blown spray gun can also use water cooling; the incidental blast of immersed top-blown spray gun usefulness water cooling can not take place, not only cooling effectiveness height, and security improves.
Described slag notch comprises slag notch and is positioned at following slag notch below the slag notch, wherein plays the position of slag notch to be lower than described side-blown spray gun and is inserted into the interior end of body of heater.
Owing to be provided with slag notch down below the end in side-blown spray gun is inserted into body of heater, therefore when needs are changed side-blown spray gun, can pass through slag notch discharging slag down, slag liquid level in the body of heater dropped to be lower than side-blown spray gun and be inserted into a end in the body of heater, just can change side-blown spray gun, need not blowing out, therefore improved efficient, reduced cost.
The body of heater top is provided with the limiting component that restriction top-blown spray gun lower end is inserted into the degree of depth in the body of heater.
Can limit the degree of depth that top-blown spray gun inserts downwards by described limiting component, thereby avoid top-blown spray gun to be inserted in the interior slag liquid level of body of heater.
Described melt inlet is positioned under the slag liquid level of body of heater.Thus, melt inlet can be all the time by the sealing of the melt (and/or slag) in the body of heater, and not only sealing is reliable, and cost is low.
The lateral wall of described body of heater is provided with protuberance, and the upper surface of described protuberance is provided with groove, and described melt enters described melt inlet via described groove.Thus, the melt that can store temporarily and easily the rock phosphate in powder of fusion be formed is discharged in the body of heater.
Described melt inlet is communicated with described groove by the passage that tilts.Can reduce the height of melt inlet thus and be not subjected to the influence of described groove location, thereby seal melt inlet better, avoid the slag liquid level to be lower than melt inlet.
Described groove top is provided with the insulation burner.By this insulation burner, can keep outside body of heater, joining the temperature of the melt in the groove, reduced the supply and the consumption of body of heater self-energy.
Described melt inlet links to each other melt is joined in the body of heater via melt inlet by chute with chute.Use this chute water conservancy diversion melt to have advantage of simple structure.
Described body of heater is provided with the ferrophosphorus outlet that is positioned at below the slag notch.By the outlet of described ferrophosphorus, can will be positioned at the ferrophosphorus discharging below the slag of being positioned at of bottom of furnace body, the ferrophosphorus of discharging can be recycled.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the schematic diagram according to the reduction oxidation furnace of the refining phosphorus by hot method of the embodiment of the invention, wherein shows the coupled melting furnace that is used for phosphorus ore fusion is become melt.
Fig. 2 is the cross-sectional schematic of an example of the melting furnace among Fig. 1.
Fig. 3 is the cross-sectional schematic of the reduction oxidation furnace of the refining phosphorus by hot method among Fig. 1.
The specific embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
Fig. 1 is the schematic diagram according to the reduction oxidation furnace of the refining phosphorus by hot method of the embodiment of the invention, wherein shows the coupled melting furnace that is used for phosphorus ore fusion is become melt.Fig. 2 is the cross-sectional schematic of an example of the melting furnace among Fig. 1.Fig. 3 is the cross-sectional schematic of the reduction oxidation furnace of the refining phosphorus by hot method among Fig. 1.
As Figure 1-3, the reduction oxidation furnace 200 of refining phosphorus by hot method according to an embodiment of the invention comprises: body of heater 50 and spray gun, wherein body of heater 50 within it portion limit a cavity (furnace chamber) and have slag notch, exhanst gas outlet 22 and be used for rock phosphate in powder with fusion and join melt inlet 27 in the body of heater 50, wherein an end of spray gun is inserted in the body of heater 50.
As illustrated in fig. 1 and 2, melting furnace 100 is used in advance phosphorus ore fusion being become melt.Then, melt joined carry out redox reaction in the reduction oxidation furnace 200, and then extract the gaseous state phosphorus pentoxide the flue gases that in reduction oxidation furnace 200, produce.
Thus, according to reduction oxidation furnace 200 of the present invention, only the melt that therein rock phosphate in powder of fusion is formed carries out redox reaction, the flue gas that produces when the flue gas that produces during phosphorus ore fusion carries out redox reaction with melt thus can not mix, therefore the impurity component of flue gas is few in the reduction oxidation furnace 200, the extraction of gaseous state phosphorus pentoxide is easy, the purity height, thus reduced cost.
The melting furnace 100 of following subtend reduction oxidation furnace 200 supply melts of the present invention is done one and is briefly described.Need to prove, melting furnace 100 is not limited to the structure that illustrates and describe here, as long as phosphorus ore fusion can be become any type of fusion apparatus of melt can, and melting furnace 100 is not a component part of the present invention, the description here only is in order to understand the present invention better, and can not think limitation of the present invention.
As depicted in figs. 1 and 2, in one example, melting furnace 100 has charge door 11 and melt outlet 14, charge door 11 is used for adding rock phosphate in powder in melting furnace 100, in order to reduce the melt temperature of rock phosphate in powder, can also add silica in melting furnace 100, for example rock phosphate in powder and silica together add in the melting furnace 100 by charge door 11.Melt outlet 14 is used for the melt in the melting furnace 100 is discharged.
As illustrated in fig. 1 and 2, melting furnace 100 can also be provided with oxynatural nozzle 12, two oxynatural nozzles 12 has been shown among Fig. 1, but has been not limited to this.Oxynatural nozzle 12 is used for spraying into oxygen and natural gas to melting furnace 100, so that the fusion rock phosphate in powder.In addition, as shown in Figure 2, can also whirlwind heater 15 be set at charge door 11 places of melting furnace 100, so that rock phosphate in powder and silica preheating to joining melting furnace 100.
The flue gas that produces in the melting furnace 100 can be discharged by charge door 11, certainly, also can independent flue gas discharge opening be set on melting furnace 100 and be used to discharge flue gas.
Melt inlet 27 on the body of heater 50 links to each other with the melt of melting furnace 100 outlet 14, joining in the body of heater 50 from the melt that melting furnace 100 is discharged.
Need to prove, melt inlet 27 links to each other with melt outlet 14, here term " links to each other " and should make broad understanding, for example melt inlet 27 can link to each other by the chute 40 that describes below with the melt outlet 14 of melting furnace 100, also can link to each other by pipeline, perhaps melt inlet 27 melt that is positioned at melting furnace 100 exports 14 belows, and the melts of discharging from the melt outlet 14 of melting furnace 100 can flow directly to melt inlet 27.
Slag notch on the body of heater 50 is used to discharge the slag in the body of heater 50.What restore elemental phosphorously forms the phosphorus pentoxide flue gas through peroxidating, discharges by exhanst gas outlet 22 with other flue gases in the body of heater 50, can isolate phosphorus pentoxide from flue gas then, is used for relieving haperacidity.
As shown in figs. 1 and 3, according to an example of the present invention, the spray gun of reduction oxidation furnace 200 comprises top-blown spray gun 21 and side-blown spray gun 26.The lower end of top-blown spray gun 21 is inserted in the body of heater 50 from the top of body of heater 50 and is positioned at slag liquid level 28 tops of body of heater 50 all the time.Top-blown spray gun 21 is used for spraying into air in body of heater 50, is used for the phosphorus that oxidation restores in the melt, thereby generates phosphorus pentoxide.As shown in Figure 3, the top of top-blown spray gun 21 is provided with air supply pipe 21a.In addition, top-blown spray gun 21 can also spray into natural gas simultaneously in body of heater 50, and combustion of natural gas is used for insulation.The top of top-blown spray gun 21 is provided with natural gas supply pipe 21b.Because the lower end of top-blown spray gun 21 does not extend in the slag (and/or melt).In other words, top-blown spray gun 21 is a non-immersed top-blown spray gun, therefore top-blown spray gun 21 can consumable, long service life, spout are difficult for stopping up, and have reduced cost and energy consumption, and top-blown spray gun can be used water cooling, improve cooling effectiveness, and can not take place to leak when the immersed top-blown spray gun is used for water cooling and the blast that produces, improved security.
In order to prevent in the top-blown spray gun 21 unexpected slags that immerse in the body of heater 50, above body of heater 50, also be provided with limiting component 33, limiting component 33 can limit top-blown spray gun 21 and stretch into depth capacity in the body of heater 50, thereby avoids in the melt that top-blown spray gun 21 immerses in the bodies of heater 50.Limiting component 33 can be any suitable version, for example can be mounted in limiting plate and the limited block that is fixed on body of heater 50 tops on the top-blown spray gun 21.
One end of side-blown spray gun 26 is in the side of body of heater 50 is inserted into body of heater 50 and be positioned at below the melt inlet 27.Side-blown spray gun 26 sprays into oxygen and fine coal or heavy oil in body of heater 50, fine coal or heavy oil combustion provide institute's calorific requirement for reduction reaction, and fine coal or heavy oil provide reduction reaction needed reducing agent carbon simultaneously.
The slag notch of body of heater 50 is divided into slag notch 23 and is positioned at following slag notch 24 below the slag notch, wherein play the position of slag notch 24 to be lower than described side-blown spray gun 26 and be inserted into a end in the body of heater 50, thus, slag liquid level in the body of heater 50 can be reduced to and be lower than side-blown spray gun 26, therefore can change side-blown spray gun 26 easily, therefore need not slag and/or melt in the body of heater 50 are emptied completely, need not blowing out, improved efficient.
As shown in Figure 3, melt inlet 27 is arranged on the sidewall of body of heater 50 and is positioned under the slag liquid level 28 of body of heater 50, and thus, slag in the body of heater 50 and/or melt can fluid-tight melt inlets 27, prevent that the flue gases in the body of heater 50 from leaking through melt inlet 27.
As shown in figs. 1 and 3, according to an example of the present invention, the lateral wall of body of heater 50 is provided with protuberance 29, and the upper surface of protuberance 29 is provided with groove 30, and groove 30 links to each other with melt inlet 27 with melt outlet 14 respectively.
For example, groove 30 is communicated with the melt outlet 14 of melting furnace 100 by chute 40, and the melt of discharging by melt outlet 14 in the melting furnace 100 is discharged in the groove 30 by chute 40, flows in the body of heater 50 by melt inlet 27 then.For the temperature of the melt in the retaining groove 30, above groove 30, be provided with insulation burner 31, insulation burner 31 for example can spray oxygen and natural gas, and combustion of natural gas is to keep the temperature of the melt in the groove 30.
As shown in Figure 3, melt inlet 27 links to each other with groove 30 by the passage 32 that tilts.Protuberance 29 can be integrally formed with the furnace wall of body of heater 50, for example made by refractory brick.It will be appreciated that though passage 32 and melt inlet 27 are described as two parts here, passage 32 also can be regarded as the part of melt inlet 27, promptly whole passage 32 is as the melt inlet 27 in the furnace wall that is formed on body of heater 50.Certainly, if regard respectively melt inlet 27 and passage 32 as independently parts, melt inlet 27 can be regarded the lower ending opening of passage 32 as so.
By the passage that passage 32 is set to tilt, make the height of melt inlet 27 to reduce, rely on melt just can seal melt inlet 27, need not additionally to seal, and melt can rely on deadweight to flow in the body of heater 50.
In order to discharge a small amount of ferrophosphorus in the body of heater 50, body of heater 50 also is provided with the ferrophosphorus outlet 25 that is positioned at below the slag notch, is used to discharge a small amount of ferrophosphorus that are deposited on below the body of heater 50 and is used for reclaiming.
Below the simple process of utilizing according to the reduction oxidation furnace 200 refining phosphorus of the embodiment of the invention of describing.
At first, the charge door 11 of rock phosphate in powder from melting furnace 100 tops joined in the melting furnace 100, simultaneously, in order to reduce the fusing point of rock phosphate in powder, also add silica flux to melting furnace 100, rock phosphate in powder can add with silica, also can add respectively.In addition, 15 pairs of rocks phosphate in powder of whirlwind heater and the silica that utilizes charge door 11 places to be provided with carries out preheating.Whirlwind heater 15 can use any existing whirlwind heater, is not described in detail its structure here.
Then, spray into oxygen and natural gas by oxynatural gas burner 12 in melting furnace 100, combustion of natural gas is to provide the fusion rock phosphate in powder required heat.
Rock phosphate in powder begins fusion when heating-up temperature reaches 1450 ℃, when heating-up temperature reaches more than 1550-1600 ℃, and the speeding up of fusion, the flue gas that produces in the melting process mainly comprises HF, SiF
4, H
2O, CO
2, CO (on a small quantity), P
2(on a small quantity), dust, flue gas is discharged by charge door 11.Can certainly discharge flue gas by the special-purpose outlet flue that is arranged on melting furnace 100 tops in addition.
The rock phosphate in powder melt of fusion in melting furnace 100 is discharged in the groove 30 via chute 40 by melt outlet 14, the melts insulation in 31 pairs of grooves of insulation nozzle 30, the melt in the groove 30 by the passage 32 that tilts in melt inlet 27 flow into body of heater 50.
In body of heater 50, spray into oxygen and coal dust (or heavy oil) by side-blown spray gun 26, coal dust firing provides reduction reaction required heat, a part of coal dust is as the reducing agent of reduction phosphorus in rock phosphate in powder simultaneously, and the reduction reaction formula of (more particularly in body of heater 50) is as follows in the reduction oxidation furnace 200:
Simultaneously, the top by top-blown spray gun 21 slag liquid level 28 in body of heater 50 sprays into natural gas and air, the temperature of slag liquid level 28 tops in the combustion of natural gas maintenance body of heater 50, airborne oxygen and the gaseous state phosphorus reaction production phosphorus pentoxide of overflowing in melt and slag.Simultaneously, a small amount of CO gas that produces in the reduction reaction of overflowing in melt and the slag further is oxidized to CO
2
Flue gas in the body of heater 50 mainly comprises P
2O
5, CO
2, CO, NO
2, discharge through the exhanst gas outlet 22 at body of heater 50 tops.From described flue gas, isolate phosphorus pentoxide, can be used to make phosphoric acid.
Compared with prior art, in reduction oxidation furnace 200, no longer carry out the fusion of rock phosphate in powder and directly the melt of fusion is reduced and oxidation, therefore the flue gas of the flue gas of phosphorus ore fusion generation and reduction oxidation furnace 200 reduction and oxidation generation can not mix, therefore the composition that contains the flue gas of phosphorus pentoxide reduces, it is easy that thereby the extraction of phosphorus pentoxide becomes, the purity height, cost is low.
The slag that body of heater 50 generates is discharged by last slag notch 23.When needs are changed side-blown spray gun 26, be lower than side-blown spray gun 26 by playing slag notch 24 that the slag liquid levels 28 in the body of heater 50 are reduced to, thereby easily change side-blown spray gun 26.
When the ferrophosphorus of body of heater 50 bottoms reaches a certain amount of, can export 25 by ferrophosphorus and discharge, be used for recycling.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claims and equivalent thereof.
Claims (10)
1, a kind of reduction oxidation furnace of refining phosphorus by hot method, it is characterized in that, comprise: body of heater and spray gun, wherein said body of heater have slag notch, exhanst gas outlet and are used for rock phosphate in powder melt with fusion and join melt inlet in the body of heater, and an end of wherein said spray gun is inserted in the body of heater.
2, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 1, it is characterized in that, described spray gun comprises top-blown spray gun and side-blown spray gun, the lower end of described top-blown spray gun is inserted into the slag liquid level top that is positioned at body of heater in the body of heater and all the time from the top of body of heater, an end of described side-blown spray gun is inserted in the body of heater from the side of body of heater and is positioned at the melt inlet below.
3, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 2 is characterized in that, described slag notch comprises slag notch and be positioned at following slag notch below the slag notch, wherein plays the position of slag notch to be lower than described side-blown spray gun and is inserted into the interior end of body of heater.
4, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 2 is characterized in that, the body of heater top is provided with the limiting component that the degree of depth in the body of heater is inserted in restriction top-blown spray gun lower end.
5, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 1 is characterized in that, described melt inlet is positioned under the slag liquid level of body of heater.
6, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 5 is characterized in that, the lateral wall of described body of heater is provided with protuberance, and the upper surface of described protuberance is provided with groove, and described melt enters described melt inlet via described groove.
7, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 6 is characterized in that, described melt inlet is communicated with described groove by the passage that tilts.
8, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 5 is characterized in that, described groove top is provided with the insulation burner.
9, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 1 is characterized in that, described melt inlet links to each other melt is joined in the body of heater via melt inlet by chute with chute.
10, the reduction oxidation furnace of refining phosphorus by hot method as claimed in claim 1 is characterized in that, described body of heater further is provided with the ferrophosphorus outlet that is positioned at below the slag notch.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910087961.XA CN101650120B (en) | 2009-06-25 | 2009-06-25 | Reduction oxidation furnace for refining phosphorus by hot method |
| US13/321,975 US8741226B2 (en) | 2009-06-25 | 2010-05-27 | Reduction-oxidation furnace for making phosphorus by thermal process |
| PCT/CN2010/073308 WO2010148899A1 (en) | 2009-06-25 | 2010-05-27 | Reduction-oxidation furnace for making phosphorus by thermal process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910087961.XA CN101650120B (en) | 2009-06-25 | 2009-06-25 | Reduction oxidation furnace for refining phosphorus by hot method |
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| CN101650120A true CN101650120A (en) | 2010-02-17 |
| CN101650120B CN101650120B (en) | 2014-03-26 |
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| CN101839640A (en) * | 2010-03-15 | 2010-09-22 | 中国恩菲工程技术有限公司 | Self-heating smelting furnace |
| WO2010148899A1 (en) * | 2009-06-25 | 2010-12-29 | 中国恩菲工程技术有限公司 | Reduction-oxidation furnace for making phosphorus by thermal process |
| WO2010148902A1 (en) * | 2009-06-25 | 2010-12-29 | 中国恩菲工程技术有限公司 | Device making phosphorus by thermal process |
| CN102303851A (en) * | 2011-07-07 | 2012-01-04 | 中国恩菲工程技术有限公司 | Reduction-oxidation furnace for refining phosphorus by hot method |
| CN102313453A (en) * | 2011-09-06 | 2012-01-11 | 北京矿冶研究总院 | Metallurgical slag thickness control device |
| CN102692123A (en) * | 2012-01-20 | 2012-09-26 | 薛良 | Gas smelting furnace and smelting method using gas |
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| CN110494389A (en) * | 2017-02-09 | 2019-11-22 | 联邦科学和工业研究组织 | From the method for phosphorite material recovery phosphorus |
| CN111440957A (en) * | 2020-04-15 | 2020-07-24 | 中国恩菲工程技术有限公司 | System and method for treating zinc concentrate and zinc slag |
| CN114212762A (en) * | 2022-01-18 | 2022-03-22 | 四川马边龙泰磷电有限责任公司 | Process for producing phosphoric acid by melting kiln method |
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| US8741226B2 (en) | 2009-06-25 | 2014-06-03 | China Enfi Engineering Corp. | Reduction-oxidation furnace for making phosphorus by thermal process |
| WO2010148899A1 (en) * | 2009-06-25 | 2010-12-29 | 中国恩菲工程技术有限公司 | Reduction-oxidation furnace for making phosphorus by thermal process |
| WO2010148902A1 (en) * | 2009-06-25 | 2010-12-29 | 中国恩菲工程技术有限公司 | Device making phosphorus by thermal process |
| US8784744B2 (en) | 2009-06-25 | 2014-07-22 | China Enfi Engineering Corp. | Device making phosphorus by thermal process |
| CN101839640B (en) * | 2010-03-15 | 2012-03-14 | 中国恩菲工程技术有限公司 | Self-heating smelting furnace |
| CN101839640A (en) * | 2010-03-15 | 2010-09-22 | 中国恩菲工程技术有限公司 | Self-heating smelting furnace |
| CN102303851A (en) * | 2011-07-07 | 2012-01-04 | 中国恩菲工程技术有限公司 | Reduction-oxidation furnace for refining phosphorus by hot method |
| CN102303851B (en) * | 2011-07-07 | 2013-10-16 | 中国恩菲工程技术有限公司 | Reduction-oxidation furnace for refining phosphorus by hot method |
| CN102313453B (en) * | 2011-09-06 | 2013-12-04 | 北京矿冶研究总院 | Metallurgical slag thickness control device |
| CN102313453A (en) * | 2011-09-06 | 2012-01-11 | 北京矿冶研究总院 | Metallurgical slag thickness control device |
| CN102692123A (en) * | 2012-01-20 | 2012-09-26 | 薛良 | Gas smelting furnace and smelting method using gas |
| CN102692123B (en) * | 2012-01-20 | 2014-08-06 | 薛良 | Gas smelting furnace and smelting method using gas |
| CN102796838A (en) * | 2012-08-27 | 2012-11-28 | 黄靖元 | Method for producing pig iron and phosphate using ferro-phosphorus |
| CN106086275A (en) * | 2016-08-05 | 2016-11-09 | 江苏省冶金设计院有限公司 | Point stove and the method carrying out metallurgy with it are melted in a kind of combustion gas with blowing device |
| CN106086275B (en) * | 2016-08-05 | 2018-01-02 | 江苏省冶金设计院有限公司 | A kind of combustion gas with blowing device is molten to divide stove and carries out the method for metallurgy with it |
| CN110494389A (en) * | 2017-02-09 | 2019-11-22 | 联邦科学和工业研究组织 | From the method for phosphorite material recovery phosphorus |
| CN109930013A (en) * | 2019-04-30 | 2019-06-25 | 南通晶朋新材料科技有限公司 | A kind of reduction furnace preparing hafnium sponge |
| CN109930013B (en) * | 2019-04-30 | 2023-12-22 | 南通晶朋新材料科技有限公司 | Reduction furnace for preparing hafnium sponge |
| CN111440957A (en) * | 2020-04-15 | 2020-07-24 | 中国恩菲工程技术有限公司 | System and method for treating zinc concentrate and zinc slag |
| CN114212762A (en) * | 2022-01-18 | 2022-03-22 | 四川马边龙泰磷电有限责任公司 | Process for producing phosphoric acid by melting kiln method |
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Effective date of registration: 20160407 Address after: 100038, building 2, building 12, Fuxing Road, Beijing, Haidian District 431 Patentee after: China Enfi Engineering Technology Co., Ltd. Patentee after: CHUANHENG ECO-TECHNOLOGY CO., LTD. Address before: 100038, building 2, building 12, Fuxing Road, Beijing, Haidian District 431 Patentee before: China Enfi Engineering Technology Co., Ltd. Patentee before: Sichuan Chuanheng Chemical Industry Co., Ltd. |