CN102515264A - Boiling chlorination furnace and manufacturing method thereof - Google Patents
Boiling chlorination furnace and manufacturing method thereof Download PDFInfo
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- CN102515264A CN102515264A CN2011103519100A CN201110351910A CN102515264A CN 102515264 A CN102515264 A CN 102515264A CN 2011103519100 A CN2011103519100 A CN 2011103519100A CN 201110351910 A CN201110351910 A CN 201110351910A CN 102515264 A CN102515264 A CN 102515264A
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Abstract
The invention discloses a boiling chlorination furnace with a longer equipment using period and a manufacturing method of the boiling chlorination furnace. The boiling chlorination furnace comprises a boiling segment, an expansion segment arranged above the boiling segment, a straight tubular segment arranged above the expansion segment and a furnace lid with an exhaust hole, wherein the furnace lid is arranged above the straight tubular segment; and the boiling furnace comprises a furnace shell, an acid resisting concrete layer, a phosphate cement layer and an anticorrosive coating layer, wherein the furnace shell is used for forming the shape of the boiling segment and protecting the inside structure of the boiling segment; the acid resisting concrete layer is formed inside the furnace shell; the phosphate cement layer is formed inside the acid resisting concrete layer, and the anticorrosive coating layer is formed inside the phosphate cement layer.
Description
Technical field
The present invention relates to a kind of boiling chloridizing furnace and method of manufacture thereof, specifically, the present invention relates to a kind of maintenance cycle long boiling chloridizing furnace and method of manufacture thereof.
Background technology
Titanium Sponge 40-60 mesh production is the basic link of titanium industry, and this is because Titanium Sponge 40-60 mesh is the raw material of titanium material, titanium valve and other titanium components.Usually, the production technique of Titanium Sponge 40-60 mesh mainly comprises: become titanium tetrachloride to ilmenite, be put in the stainless cylinder of steel of sealing again, fill with argon gas, they and MAGNESIUM METAL 99 are reacted.Wherein, titanium tetrachloride is mainly as producing Titanium Sponge 40-60 mesh, white titanium pigment and titanous chloride.The preparation method of titanium tetrachloride is a lot, mainly contains fluidizing chlorination, fused salt chlorimation and 3 kinds of methods of shaft chlorination.Fluidizing chlorination is the main method of existing production titanium tetrachloride; In fluidizing chlorination, the carburizing chlorination of titanium slag is thermopositive reaction, reaches temperature of reaction from outside heat supply when only needing beginning, and chlorination reaction just can be undertaken by self-heating, and the easy more greatly more self-heating that reaches of the type of furnace.In actual production, along with the maximization gradually of boiling chloridizing furnace, its corrosion speed is accelerated, and the chlorination furnace after the overhaul was being produced about 40 days, the phenomenon that the excessive erosion perforation is smoldered just occurs, and is the most obvious with boiling section especially, and the type of furnace is big more, obvious more.
Fig. 1 shows the schematic cross sectional views of the boiling section 100 of traditional boiling chloridizing furnace.Visible by Fig. 1, boiling section 100 comprises the furnace shell 110 processed by steel plate and in the inner furnace wall 120 of furnace shell 110.Furnace wall 120 is processed by several layers of fire-resistant and lagging material; Specifically, furnace wall 120 is formed by sequentially range upon range of insulating brick-layer 130, acid resisting concrete layer 140, first undercloak 150, the carbon element bed of material 160, second undercloak 170 and refractory precast block layer 180.Because chlorination reaction is thermopositive reaction; Along with the increase of the type of furnace, the heat that reaction in furnace produces is also many more, adopts insulation construction on the furnace design again; Heat energy accumulates in the stove and can't outside stove, dispel the heat well, under acidic medium and high temperature action, has accelerated corrosion on Equipment.Owing to be that the typing refractory materials is built by laying bricks or stones mostly in the liner design; Construction formation level, vertical and the radiation brickwork joint is many; Exist the imprecise situation of brickwork joint if adding construction in building by laying bricks or stones, chlorine just is easy to be penetrated into outer wall through brickwork joint, and steel plate is caused corrosion failure.In fluidizing chlorination was produced, boiling section was a chlorination furnace principal reaction section, and temperature is high, and chlorine gas concentration is big, and material is serious to washing away of furnace wall, so boiling section is corroded the most easily.
How to improve the acid resistance and the high thermal resistance of inner lining of furnace, rationally use refractory materials and improve brick-building art, thereby obtain longer equipment life cycle, become technical problem anxious to be solved in the fluidizing chlorination technology.
Summary of the invention
Each side of the present invention provides a kind of boiling chloridizing furnace with longer equipment life cycle.
One side of the present invention provides a kind of boiling chloridizing furnace; Said boiling chloridizing furnace comprises boiling section, is arranged on the expanding reach of boiling section top, is arranged on the direct tube section of expanding reach top and is arranged on the direct tube section top and have the bell of venting port; Wherein, Boiling section comprises: furnace shell forms the outward appearance of boiling section and protects the internal structure of boiling section; The acid resisting concrete layer is formed on furnace shell inside; The aqueous phosphate mud layer, it is inner to be formed on the acid resisting concrete layer; The protective system layer, it is inner to be formed on the aqueous phosphate mud layer.
According to a further aspect in the invention, the protective system layer is formed by water glass Feldspar Powder mud.
According to a further aspect in the invention, water glass accounts for the 40wt% to 60wt% of protective system layer, and Feldspar Powder accounts for the 40wt% to 60wt% of protective system layer.
According to a further aspect in the invention, said boiling chloridizing furnace also can comprise the sealing material, is processed by the ceramic fiber circle sennit that is impregnated with protective system, and is used to clog the inner slit of boiling section.
According to a further aspect in the invention, to comprise the phosphoric acid salt casting aggregate of 78wt%-81wt%, the carbide fine powder of 9wt%-11wt%, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% be the phosphoric acid of 45%-48% to the aqueous phosphate mud layer.
According to a further aspect in the invention, said boiling section also is included in another protective system layer between furnace shell and the acid resisting concrete layer.
Another aspect of the present invention provides a kind of method of manufacture of boiling chloridizing furnace; Said boiling chloridizing furnace comprises boiling section, is arranged on the expanding reach of boiling section top, is arranged on the direct tube section of expanding reach top and is arranged on the direct tube section top and have the bell of venting port; Wherein, The step of making boiling section comprises: form furnace shell, said furnace shell defines the outward appearance of boiling section and protects the internal structure of boiling section; At the inner acid resisting concrete layer that forms of furnace shell; At the inner aqueous phosphate mud layer that forms of acid resisting concrete layer; At the inner protective system layer that forms of aqueous phosphate mud layer.
According to a further aspect in the invention, form the protective system layer by water glass Feldspar Powder mud.
According to a further aspect in the invention, water glass accounts for the 40wt% to 60wt% of protective system layer, and Feldspar Powder accounts for the 40wt% to 60wt% of protective system layer.
According to a further aspect in the invention, said method also is included in and forms the sealing material in the boiling section, and said sealing material is processed by the ceramic fiber circle sennit that is impregnated with protective system, and is used to clog the inner slit of boiling section.
According to a further aspect in the invention, to comprise the phosphoric acid salt casting aggregate of 78wt%-81wt%, the carbide fine powder of 9wt%-11wt%, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% be the phosphoric acid of 45%-48% to the aqueous phosphate mud layer.
According to a further aspect in the invention, said method also is included between step that forms furnace shell and the step that forms the acid resisting concrete layer at inner another protective system layer that forms of furnace shell.
Description of drawings
Through the description of carrying out below in conjunction with accompanying drawing to embodiment, above-mentioned and/or other purposes of the present invention and advantage will become apparent, wherein:
Fig. 1 is the schematic transverse sectional view of the boiling section of traditional boiling chloridizing furnace;
Fig. 2 is the schematic longitudinal sectional view of boiling chloridizing furnace according to an exemplary embodiment of the present invention;
Fig. 3 is the schematic transverse sectional view of the boiling section of boiling chloridizing furnace according to an exemplary embodiment of the present invention.
Embodiment
Exemplary embodiment of the present invention is described below with reference to accompanying drawings.
Fig. 2 is the schematic longitudinal sectional view of boiling chloridizing furnace 200 according to an exemplary embodiment of the present invention.With reference to Fig. 2, boiling chloridizing furnace 200 comprises boiling section 210, expanding reach 220, direct tube section 230 and bell 240.Boiling section 210 is arranged on the below of boiling chloridizing furnace 200, titanium ore and chlorine thorough mixing and begin to carry out the chlorination reaction of titanium ore in boiling section 210.Expanding reach 220 is arranged on boiling section 210 tops, and expanding reach 220 can provide the required space of chemical reaction takes place.Direct tube section 230 is arranged on the top of expanding reach 220, and reacted material can pass through direct tube section 230 along with gas is disposed to the condensing surface (not shown) from outlet.The top of direct tube section 230 also is provided with bell 240, with the sealing fluidizing furnace, prevents material from leakage.Also be provided with venting port in the bell 240, with the passage that provides gas to discharge.
Fluidizing furnace adds the filling tube of material powder from the body of heater top when work, and chlorine is blown into from the chlorine hole of body of heater bottom simultaneously.Material powder that adds and chlorine thorough mixing and begin to react in boiling section 210.Material in the reaction upwards enters into expanding reach 220 with gas, and further reaction in expanding reach 220.At last, reaction product (mainly being titanium tetrachloride) emits through the venting port that is arranged in the bell 240 through direct tube section 230 with gas, and is separated from the gas behind one or more levels condensing surface of process.
Fig. 3 is the schematic transverse sectional view of the boiling section 210 of boiling chloridizing furnace 200 according to an exemplary embodiment of the present invention.
With reference to Fig. 3, boiling section 210 comprises furnace shell 211, acid resisting concrete layer 212, aqueous phosphate mud layer 213 and protective system layer 214.
Furnace shell 211 can be processed by steel plate, and furnace shell 211 forms the outward appearance of boiling section 210 and protects the internal structure of boiling section 210 in the outermost of boiling section 210.
Acid resisting concrete layer 212 is formed on the inside of furnace shell 211.Acid resisting concrete layer 212 is mainly processed by acid resisting concrete, and wherein, acid resisting concrete is the faintly acid concrete such as phosphoric acid of adding 5% to 10%.Acid resisting concrete can be used as wedding agent, and it can more efficiently protect wall lining not by acid corrosion in acidic medium.Because in process of production, chlorine can generate hydrochloric acid with material reaction, and therefore forming acid resisting concrete layer 212 can prevent that hydrochloric acid and wall lining from reacting.
Aqueous phosphate mud layer 213 is formed on the inside of acid resisting concrete layer 212.Phosphate cement is a kind of refractory materials, and it is mainly formed by phosphoric acid salt casting aggregate, carbide fine powder, luminite cement (that is high-alumina cement) and phosphoric acid.Each components contents of phosphate cement can change owing to production technique is different within the specific limits; Usually, to comprise the phosphoric acid salt casting aggregate of 78wt%-81wt%, the carbide fine powder of 9wt%-11wt%, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% be the phosphoric acid of 45%-48% to phosphate cement.According to one embodiment of present invention, luminite cement is the 525# luminite cement that can purchase on the market.According to one embodiment of present invention, the concentration of phosphoric acid of use is 45%.Phosphoric acid salt casting aggregate mainly plays the effect of concrete skeleton, and for example, phosphoric acid salt casting aggregate can be rubble and/or river sand.
Compare with traditional refractory brick building block, use phosphate cement can reduce the slit in the flame retardant coating, thereby can avoid the chlorine in the boiling section to be penetrated into the outside, thereby reduce or avoided corrosion furnace shell through the slit.
Protective system layer 214 is formed on aqueous phosphate mud layer 213 inside.The protective system layer is by having certain antiseptic power, and the material that has higher intensity simultaneously forms, thereby can protect the aqueous phosphate mud layer not receive the corrosion of chlorine effectively, and is not easy owing to washing away of material caused damage.According to one embodiment of present invention, protective system layer 214 is mainly formed by water glass Feldspar Powder mud.The ratio of water glass and Feldspar Powder mud can suitably be regulated according to working conditions is different, and according to one embodiment of present invention, water glass accounts for the 40wt% to 60wt% of protective system layer, and Feldspar Powder accounts for the 40wt% to 60wt% of protective system layer.
According to one embodiment of present invention; Can also between acid resisting concrete layer 212 and furnace shell 211, form the second protective system layer (not shown); The said second protective system layer can be formed by the material identical materials with protective system layer 214, thereby can protect furnace shell 211 better.
According to one embodiment of present invention, can also in boiling section 210, form sealing material (not shown), said sealing material is processed by the ceramic fiber circle sennit that is impregnated with protective system, and is used to clog the inner slit of boiling section.Through the fill plug seal material, the infiltration of chlorine or other corrosive gases can be prevented better, thereby the corrosion of furnace shell 211 can be prevented better, prolong the cycle of operation of equipment.
According to one embodiment of present invention, can also between acid resisting concrete layer 212 and aqueous phosphate mud layer 213, form one or more supplementary layer.Supplementary layer can be the layer that well known to a person skilled in the art reinforcing, function such as heat insulation.For example, supplementary layer can comprise undercloak, the carbon element bed of material etc.
To describe method of manufacture below in detail according to boiling chloridizing furnace of the present invention.
Boiling chloridizing furnace according to the present invention comprises boiling section, is arranged on the expanding reach of boiling section top, is arranged on the direct tube section of expanding reach top and is arranged on the direct tube section top and have the bell of venting port.The method of making expanding reach, direct tube section and bell is basic identical with the method for making traditional chlorination furnace, therefore here no longer is repeated in this description.Below the step that is used to make boiling section will be described mainly.
The step of making boiling section mainly comprises: form furnace shell, said furnace shell defines the outward appearance of boiling section and protects the internal structure of boiling section; At the inner acid resisting concrete layer that forms of furnace shell; At the inner aqueous phosphate mud layer that forms of acid resisting concrete layer; At the inner protective system layer that forms of aqueous phosphate mud layer.
Furnace shell can be processed by steel plate, and furnace shell forms the outward appearance of boiling section and protects the internal structure of boiling section in the outermost of boiling section.
The acid resisting concrete layer that is formed on the inside of furnace shell is mainly processed by acid resisting concrete, and wherein, acid resisting concrete is the faintly acid concrete such as phosphoric acid of adding 5% to 10%.Acid resisting concrete can be used as wedding agent, and it can more efficiently protect wall lining not by acid corrosion in acidic medium.The purpose that forms the acid resisting concrete layer is to prevent the hcl corrosion wall lining of reaction generation in chlorination furnace.
The aqueous phosphate mud layer that is formed on the inside of acid resisting concrete layer is a kind of refractory materials, and it is mainly formed by phosphoric acid salt casting aggregate, carbide fine powder, luminite cement and phosphoric acid.Each components contents of phosphate cement can change owing to production technique is different within the specific limits; Usually, to comprise the phosphoric acid salt casting aggregate of 78wt%-81wt%, the carbide fine powder of 9wt%-11wt%, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% be the phosphoric acid of 45%-48% to phosphate cement.According to one embodiment of present invention, luminite cement is the 525# luminite cement that can purchase on the market.According to one embodiment of present invention, the concentration of phosphoric acid of use is 45%.Phosphoric acid salt casting aggregate mainly plays the effect of concrete skeleton, and for example, phosphoric acid salt casting aggregate can be rubble and/or river sand.
Compare with traditional refractory brick building block, use phosphate cement can reduce the slit in the flame retardant coating, thereby can avoid the chlorine in the boiling section to be penetrated into the outside, thereby reduce or avoided corrosion furnace shell through the slit.
Be formed on the inner protective system layer of aqueous phosphate mud layer by having certain antiseptic power, the material that has higher intensity simultaneously forms.Thereby can protect the aqueous phosphate mud layer not receive the corrosion of chlorine effectively, and be not easy owing to washing away of material caused damage.According to one embodiment of present invention, the protective system layer is mainly formed by water glass Feldspar Powder mud.The ratio of water glass and Feldspar Powder mud can suitably be regulated according to working conditions is different, and according to one embodiment of present invention, the weight ratio of water glass and Feldspar Powder is 1: 1.
According to one embodiment of present invention, can also between acid resisting concrete layer and furnace shell, form the second protective system layer (not shown), the said second protective system layer can be formed by the material identical materials with the protective system layer, thereby can protect furnace shell better.
According to one embodiment of present invention, can also in boiling section, form the sealing material, said sealing material is processed by the ceramic fiber circle sennit that is impregnated with protective system, and is used to clog the inner slit of boiling section.Through the fill plug seal material, the infiltration of chlorine or other corrosive gases can be prevented better, thereby the corrosion of furnace shell can be prevented better, prolong the cycle of operation of equipment.
The above-mentioned method that is used to make boiling section can also be used for the boiling section of existing chlorination furnace is overhauled transformation.When being used for the maintenance transformation, earlier original boiling section being removed, and then formed acid resisting concrete layer, aqueous phosphate mud layer and protective system layer respectively in existing furnace shell inside according to above-mentioned steps.
Though having combined accompanying drawing has described according to exemplary embodiment of the present invention; But it should be understood by one skilled in the art that; Under the situation that does not break away from the spirit and scope of the present invention; Can carry out various modifications and change to these exemplary embodiments, scope of the present invention is limited claims and equivalent thereof.
Claims (12)
1. boiling chloridizing furnace, said boiling chloridizing furnace comprise boiling section, are arranged on the expanding reach of boiling section top, are arranged on the direct tube section of expanding reach top and are arranged on the direct tube section top and have the bell of venting port, and wherein, boiling section comprises:
Furnace shell forms the outward appearance of boiling section and protects the internal structure of boiling section;
The acid resisting concrete layer is formed on furnace shell inside;
The aqueous phosphate mud layer, it is inner to be formed on the acid resisting concrete layer;
The protective system layer, it is inner to be formed on the aqueous phosphate mud layer.
2. boiling chloridizing furnace as claimed in claim 1, wherein, the protective system layer is formed by water glass Feldspar Powder mud.
3. boiling chloridizing furnace as claimed in claim 2, wherein, water glass accounts for the 40wt% to 60wt% of protective system layer, and Feldspar Powder accounts for the 40wt% to 60wt% of protective system layer.
4. boiling chloridizing furnace as claimed in claim 1, wherein, said boiling chloridizing furnace also comprises the sealing material, is processed by the ceramic fiber circle sennit that is impregnated with protective system, and is used to clog the inner slit of boiling section.
5. boiling chloridizing furnace as claimed in claim 1; Wherein, to comprise the phosphoric acid salt casting aggregate of 78wt%-81wt%, the carbide fine powder of 9wt%-11wt%, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% be the phosphoric acid of 45%-48% to the aqueous phosphate mud layer.
6. boiling chloridizing furnace as claimed in claim 1, said boiling section also comprise another protective system layer, are formed between furnace shell and the acid resisting concrete layer.
7. the method for manufacture of a boiling chloridizing furnace; Said boiling chloridizing furnace comprises boiling section, is arranged on the expanding reach of boiling section top, is arranged on the direct tube section of expanding reach top and is arranged on the direct tube section top and have the bell of venting port; Wherein, the step of manufacturing boiling section comprises:
Form furnace shell, said furnace shell defines the outward appearance of boiling section and protects the internal structure of boiling section;
At the inner acid resisting concrete layer that forms of furnace shell;
At the inner aqueous phosphate mud layer that forms of acid resisting concrete layer;
At the inner protective system layer that forms of aqueous phosphate mud layer.
8. method as claimed in claim 7 wherein, forms the protective system layer by water glass Feldspar Powder mud.
9. method as claimed in claim 8, wherein, water glass accounts for the 40wt% to 60wt% of protective system layer, and Feldspar Powder accounts for the 40wt% to 60wt% of protective system layer.
10. method as claimed in claim 7, wherein, said method also is included in and forms the sealing material in the boiling section, and said sealing material is processed by the ceramic fiber circle sennit that is impregnated with protective system, and is used to clog the inner slit of boiling section.
11. method as claimed in claim 7; Wherein, to comprise the phosphoric acid salt casting aggregate of 78wt%-81wt%, the carbide fine powder of 9wt%-11wt%, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% be the phosphoric acid of 45%-48% to the aqueous phosphate mud layer.
12. method as claimed in claim 7, wherein, said method also is included between step that forms furnace shell and the step that forms the acid resisting concrete layer at inner another protective system layer that forms of furnace shell.
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| CN201110351910.0A CN102515264B (en) | 2011-11-09 | 2011-11-09 | Boiling chlorination furnace and manufacturing method thereof |
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| CN201110351910.0A CN102515264B (en) | 2011-11-09 | 2011-11-09 | Boiling chlorination furnace and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104310465A (en) * | 2014-10-17 | 2015-01-28 | 金川集团股份有限公司 | High-temperature-resistant corrosion-resistant furnace body for fluidizing chlorination furnace and manufacturing method of high-temperature-resistant corrosion-resistant furnace body |
| CN105271386A (en) * | 2015-11-18 | 2016-01-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Chlorination furnace roof |
| CN106052393A (en) * | 2016-05-26 | 2016-10-26 | 宜宾天原集团股份有限公司 | Chlorination furnace lining and manufacturing method thereof |
| CN110453968A (en) * | 2019-08-26 | 2019-11-15 | 广西凌云通鸿水泥有限公司 | Anti-corrosion high temperature stacks and its construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104310465A (en) * | 2014-10-17 | 2015-01-28 | 金川集团股份有限公司 | High-temperature-resistant corrosion-resistant furnace body for fluidizing chlorination furnace and manufacturing method of high-temperature-resistant corrosion-resistant furnace body |
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| CN105271386A (en) * | 2015-11-18 | 2016-01-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Chlorination furnace roof |
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| CN106052393A (en) * | 2016-05-26 | 2016-10-26 | 宜宾天原集团股份有限公司 | Chlorination furnace lining and manufacturing method thereof |
| CN110453968A (en) * | 2019-08-26 | 2019-11-15 | 广西凌云通鸿水泥有限公司 | Anti-corrosion high temperature stacks and its construction method |
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