CN102515264B - Boiling chlorination furnace and manufacturing method thereof - Google Patents
Boiling chlorination furnace and manufacturing method thereof Download PDFInfo
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- CN102515264B CN102515264B CN201110351910.0A CN201110351910A CN102515264B CN 102515264 B CN102515264 B CN 102515264B CN 201110351910 A CN201110351910 A CN 201110351910A CN 102515264 B CN102515264 B CN 102515264B
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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 manufacture method thereof, specifically, the present invention relates to a kind of maintenance cycle long boiling chloridizing furnace and manufacture method thereof.
Background technology
It is the basic link of titanium industry that titanium sponge is produced, and this is to be the raw material of titanium material, titanium valve and other titanium components due to titanium sponge.Conventionally, the production technique of titanium sponge mainly comprises: ilmenite is become to titanium tetrachloride, then be put in the stainless cylinder of steel of sealing, fill with argon gas, they are reacted with MAGNESIUM METAL.Wherein, titanium tetrachloride is mainly as producing titanium sponge, titanium dioxide 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, only needs to reach temperature of reaction from outside heat supply while beginning, and chlorination reaction just can be undertaken by self-heating, and the type of furnace more greatly more easily reaches self-heating.In actual production, along with the maximization gradually of boiling chloridizing furnace, its corrosion speed is accelerated, and the chlorination furnace after overhaul is being produced about 40 days, just occurs the excessive erosion phenomenon of smoldering of boring a hole, especially the most obvious with boiling section, and the type of furnace is larger, more obvious.
Fig. 1 shows the schematic cross sectional views of the boiling section 100 of traditional boiling chloridizing furnace.As seen from Figure 1, boiling section 100 comprises the furnace shell 110 be made up of steel plate and the furnace wall 120 in furnace shell 110 inside.Be made up of several layers of fire-resistant and lagging material furnace wall 120, specifically, furnace wall 120 is formed by sequentially stacked insulating brick-layer 130, acid resisting concrete layer 140, the first undercloak 150, the carbon element bed of material 160, the 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 more, adopts insulation construction in furnace design again, heat energy is gathered in stove and cannot outside stove, dispels the heat well, has accelerated the corrosion of equipment under acidic medium and high temperature action.Owing on lining-design being mostly sizing refractory material laying, construction formation level, vertical and radiation brickwork joint is many, exist the imprecise situation of brickwork joint if adding construction in building by laying bricks or stones, chlorine is just easy to be penetrated into outer wall by brickwork joint, and steel plate is caused to corrosion failure.In fluidizing chlorination is produced, boiling section is chlorination furnace principal reaction section, and temperature is high, and chlorine gas concentration is large, and material is serious to washing away of furnace wall, and therefore boiling section is the most easily corroded.
How to improve acid resistance and the high thermal resistance of inner lining of furnace, rationally use refractory materials and improve brick-building art, thereby obtain longer life of equipment, become technical problem anxious to be resolved in fluidizing chlorination technique.
Summary of the invention
Each aspect of the present invention provides a kind of boiling chloridizing furnace with longer life of equipment.
An aspect of of the present present invention provides a kind of boiling chloridizing furnace, described 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 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 protect the internal structure of boiling section; Acid resisting concrete layer, is formed on furnace shell inside; Phosphate cement layer, is formed on acid resisting concrete layer inside; Protective system layer, is formed on phosphate cement layer inside.
According to a further aspect in the invention, 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, described boiling chloridizing furnace also can comprise sealing material, made by the ceramic fiber circle sennit that is impregnated with protective system, and for clogging the gap of boiling section inside.
According to a further aspect in the invention, the phosphoric acid that the phosphoric acid salt casting aggregate that phosphate cement layer comprises 78wt%-81wt%, carbide fine powder, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% of 9wt%-11wt% are 45%-48%.
According to a further aspect in the invention, described boiling section is also included in another protective system layer between furnace shell and acid resisting concrete layer.
Another aspect of the present invention provides a kind of manufacture method of boiling chloridizing furnace, described 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 direct tube section top and have the bell of venting port, wherein, the step of manufacturing boiling section comprises: form furnace shell, described 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 phosphate cement layer that forms of acid resisting concrete layer; At the inner protective system layer that forms of phosphate cement layer.
According to a further aspect in the invention, form 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, described method is also included in boiling section and forms sealing material, and described sealing material is made up of the ceramic fiber circle sennit that is impregnated with protective system, and for clogging the gap of boiling section inside.
According to a further aspect in the invention, the phosphoric acid that the phosphoric acid salt casting aggregate that phosphate cement layer comprises 78wt%-81wt%, carbide fine powder, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% of 9wt%-11wt% are 45%-48%.
According to a further aspect in the invention, described method is also included between the step that forms the step of furnace shell and form acid resisting concrete layer at inner another protective system layer that forms of furnace shell.
Brief description of the drawings
By the description to embodiment of carrying out below in conjunction with accompanying drawing, above-mentioned and/or other objects 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, and titanium ore fully mixes and start to carry out the chlorination reaction of titanium ore in boiling section 210 with chlorine.Expanding reach 220 is arranged on boiling section 210 tops, and expanding reach 220 can provide the required space of chemical reaction occurs.Direct tube section 230 is arranged on the top of expanding reach 220, and reacted material can be through direct tube section 230 along with gas is disposed to condenser (not shown) from outlet.The top of direct tube section 230 is also provided with bell 240, to seal fluidizing furnace, prevents material from leakage.In bell 240, be also provided with venting port, with the passage that provides gas to discharge.
Fluidizing furnace, in the time of work, adds material powder from the filling tube of body of heater top, chlorine is blown into from the chlorine hole of lower portion of furnace body simultaneously.The material powder adding fully mixes and starts in boiling section 210 with chlorine and reacts.Material in reaction upwards enters into expanding reach 220 with gas, and further reaction in expanding reach 220.Finally, reaction product (being mainly titanium tetrachloride) emits by the venting port being arranged in bell 240 through direct tube section 230 with gas, separated from the gas after one or more levels condenser.
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, phosphate cement layer 213 and protective system layer 214.
Furnace shell 211 can be made up of 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 made up of acid resisting concrete, and wherein, acid resisting concrete is the concrete that adds the weak acid such as 5% to 10% phosphoric acid.Acid resisting concrete can be used as bonding agent, and it can more efficiently protect wall lining not by acid corrosion in acidic medium.Due in process of production, chlorine can generate hydrochloric acid with material reaction, therefore forms acid resisting concrete layer 212 and can prevent that hydrochloric acid and wall lining from reacting.
Phosphate cement 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 (, high-alumina cement) and phosphoric acid.The content of each component of phosphate cement can change within the specific limits because production technique is different, conventionally the phosphoric acid that the phosphoric acid salt casting aggregate that, phosphate cement comprises 78wt%-81wt%, carbide fine powder, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% of 9wt%-11wt% are 45%-48%.According to one embodiment of present invention, luminite cement is the 525# luminite cement that can purchase on market.According to one embodiment of present invention, the concentration of the 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.
Compared with traditional refractory brick building block, use phosphate cement can reduce the gap in flame retardant coating, thereby can avoid the chlorine in boiling section to be penetrated into outside by gap, thereby reduce or avoided the corrosion to furnace shell.
Protective system layer 214 is formed on phosphate cement layer 213 inside.Protective system layer is by having certain antiseptic power, and the material simultaneously with higher intensity forms, thereby can effectively protect phosphate cement layer not to be subject to the corrosion of chlorine, and is not easy because 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 regulate 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); described the second protective system layer can be formed by the material identical with the material of protective system layer 214, thereby can protect better furnace shell 211.
According to one embodiment of present invention, can also in boiling section 210, form sealing material (not shown), described sealing material is made up of the ceramic fiber circle sennit that is impregnated with protective system, and for clogging the gap of boiling section inside.By fill plug seal material, can prevent better the infiltration of chlorine or other corrosive gases, thereby can prevent better the corrosion of furnace shell 211, the cycle of operation of extension device.
According to one embodiment of present invention, can also between acid resisting concrete layer 212 and phosphate cement 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, the function such as heat insulation.For example, supplementary layer can comprise undercloak, the carbon element bed of material etc.
To describe in detail according to the manufacture method of boiling chloridizing furnace of the present invention below.
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 direct tube section top and have the bell of venting port.The method of manufacturing expanding reach, direct tube section and bell is basic identical with the method for manufacturing traditional chlorination furnace, is therefore here no longer repeated in this description.Below by the step of mainly describing for the manufacture of boiling section.
The step of manufacturing boiling section mainly comprises: form furnace shell, described 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 phosphate cement layer that forms of acid resisting concrete layer; At the inner protective system layer that forms of phosphate cement layer.
Furnace shell can be made up of 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 made up of acid resisting concrete, and wherein, acid resisting concrete is the concrete that adds the weak acid such as 5% to 10% phosphoric acid.Acid resisting concrete can be used as bonding agent, and it can more efficiently protect wall lining not by acid corrosion in acidic medium.The object that forms acid resisting concrete layer is the hcl corrosion wall lining that prevents that reaction generates in chlorination furnace.
The phosphate cement 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.The content of each component of phosphate cement can change within the specific limits because production technique is different, conventionally the phosphoric acid that the phosphoric acid salt casting aggregate that, phosphate cement comprises 78wt%-81wt%, carbide fine powder, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% of 9wt%-11wt% are 45%-48%.According to one embodiment of present invention, luminite cement is the 525# luminite cement that can purchase on market.According to one embodiment of present invention, the concentration of the 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.
Compared with traditional refractory brick building block, use phosphate cement can reduce the gap in flame retardant coating, thereby can avoid the chlorine in boiling section to be penetrated into outside by gap, thereby reduce or avoided the corrosion to furnace shell.
Be formed on the protective system layer of phosphate cement layer inside by having certain antiseptic power, the material simultaneously with higher intensity forms.Thereby can effectively protect phosphate cement layer not to be subject to the corrosion of chlorine, and be not easy because washing away of material caused damage.According to one embodiment of present invention, protective system layer is mainly formed by water glass Feldspar Powder mud.The ratio of water glass and Feldspar Powder mud can suitably regulate 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); described the second protective system layer can be formed by the material identical with the material of protective system layer, thereby can protect better furnace shell.
According to one embodiment of present invention, can also in boiling section, form sealing material, described sealing material is made up of the ceramic fiber circle sennit that is impregnated with protective system, and for clogging the gap of boiling section inside.By fill plug seal material, can prevent better the infiltration of chlorine or other corrosive gases, thereby can prevent better the corrosion of furnace shell, the cycle of operation of extension device.
The above-mentioned method for the manufacture of boiling section can also be used for the boiling section of existing chlorination furnace to overhaul transformation.When for overhauling when transformation, first original boiling section is removed, and then formed respectively acid resisting concrete layer, phosphate cement layer and protective system layer according to above-mentioned steps in existing furnace shell inside.
Although described by reference to the accompanying drawings according to exemplary embodiment of the present invention, but it should be understood by one skilled in the art that, without departing from the spirit and scope of the present invention, can carry out various amendments and change to these exemplary embodiments, scope of the present invention is limited by claims and equivalent thereof.
Claims (10)
1. a boiling chloridizing furnace, described 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 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;
Acid resisting concrete layer, is formed on furnace shell inside;
Phosphate cement layer, is formed on acid resisting concrete layer inside;
Protective system layer, is formed on phosphate cement layer inside,
Protective system layer is formed by water glass Feldspar Powder mud.
2. boiling chloridizing furnace as claimed in claim 1, 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.
3. boiling chloridizing furnace as claimed in claim 1, wherein, described boiling chloridizing furnace also comprises sealing material, made by the ceramic fiber circle sennit that is impregnated with protective system, and for clogging the gap of boiling section inside.
4. boiling chloridizing furnace as claimed in claim 1, wherein, the phosphoric acid that the phosphoric acid salt casting aggregate that phosphate cement layer comprises 78wt%-81wt%, carbide fine powder, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% of 9wt%-11wt% are 45%-48%.
5. boiling chloridizing furnace as claimed in claim 1, described boiling section also comprises another protective system layer, is formed between furnace shell and acid resisting concrete layer.
6. the manufacture method of a boiling chloridizing furnace, described 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 direct tube section top and have the bell of venting port, wherein, the step of manufacture boiling section comprises:
Form furnace shell, described 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 phosphate cement layer that forms of acid resisting concrete layer;
At the inner protective system layer that forms of phosphate cement layer,
Wherein, form protective system layer by water glass Feldspar Powder mud.
7. method as claimed in claim 6, 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.
8. method as claimed in claim 6, wherein, described method is also included in boiling section and forms sealing material, and described sealing material is made up of the ceramic fiber circle sennit that is impregnated with protective system, and for clogging the gap of boiling section inside.
9. method as claimed in claim 6, wherein, the phosphoric acid that the phosphoric acid salt casting aggregate that phosphate cement layer comprises 78wt%-81wt%, carbide fine powder, the luminite cement of 2wt%-4wt% and the concentration of 6wt%-8wt% of 9wt%-11wt% are 45%-48%.
10. method as claimed in claim 6, wherein, described method is also included between the step that forms the step of furnace shell and form 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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| CN102515264A CN102515264A (en) | 2012-06-27 |
| CN102515264B true CN102515264B (en) | 2014-09-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104310465B (en) * | 2014-10-17 | 2016-03-02 | 金川集团股份有限公司 | A kind of corrosion-and high-temp-resistant body of heater for boiling chloridizing furnace and preparation method thereof |
| CN105271386B (en) * | 2015-11-18 | 2016-09-21 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of chlorination furnace furnace roof |
| CN106052393B (en) * | 2016-05-26 | 2018-09-25 | 宜宾天原集团股份有限公司 | Chlorination furnace lining and preparation 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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| CN2923669Y (en) * | 2006-07-17 | 2007-07-18 | 贵阳铝镁设计研究院 | Sieve-board-free boiling chloring furnace |
| CN101746815A (en) * | 2008-12-05 | 2010-06-23 | 贵阳铝镁设计研究院 | Boiling chlorination furnace for preparing titanium tetrachloride by using natural rutile |
| CN102134057A (en) * | 2011-01-20 | 2011-07-27 | 清华大学 | Reactor for preparing chlorine by catalytic oxidation of hydrogen chloride |
| CN102230732A (en) * | 2011-07-01 | 2011-11-02 | 广州有色金属研究院 | Closed automatic slag discharge device for boiling chlorination furnace |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2923669Y (en) * | 2006-07-17 | 2007-07-18 | 贵阳铝镁设计研究院 | Sieve-board-free boiling chloring furnace |
| CN101746815A (en) * | 2008-12-05 | 2010-06-23 | 贵阳铝镁设计研究院 | Boiling chlorination furnace for preparing titanium tetrachloride by using natural rutile |
| CN102134057A (en) * | 2011-01-20 | 2011-07-27 | 清华大学 | Reactor for preparing chlorine by catalytic oxidation of hydrogen chloride |
| CN102230732A (en) * | 2011-07-01 | 2011-11-02 | 广州有色金属研究院 | Closed automatic slag discharge device for boiling chlorination furnace |
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