CN102775082A - Production method of white cement and sulfuric acid - Google Patents
Production method of white cement and sulfuric acid Download PDFInfo
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- CN102775082A CN102775082A CN201210292578XA CN201210292578A CN102775082A CN 102775082 A CN102775082 A CN 102775082A CN 201210292578X A CN201210292578X A CN 201210292578XA CN 201210292578 A CN201210292578 A CN 201210292578A CN 102775082 A CN102775082 A CN 102775082A
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Abstract
The invention relates to a production method of white cement and sulfuric acid. By adopting a five-level cyclone preheating technology and double-turning double-absorbing acid washing and acid making technology, kiln gas and white cement clinker with the concentration of sulfur dioxide being 7.0-11.0% are obtained by using desulfuration gypsum, anhydrite, siliceous material and barium sulfate as the main material and carrying out preheating, decomposing and calcining. Sulfur dioxide is respectively produced into industrial sulfuric acid with the mass fraction being 92.5% and 98.0% by using a double-turning double-absorbing acid washing and acid making technology; the white cement clinker is whitened and cooled and added to a cement grinding mill with 2.0-4.5% of gypsum to grind decorating white cement. The production method has the advantages that the material proportioning is unique and two high value-added products of sulfuric acid and white cement clinker can be produced at the same time; desulfuration gypsum waste resources are fully utilized and secondary pollution is not generated; a five-level cyclone preheating technology is adopted and a mineralizing agent is introduced, the energy consumption is low and the benefit is high; and the produced white cement has the characteristics of high whiteness, brightness, high intensity and radiation resistance.
Description
Technical field
The invention belongs to the working method of a kind of white cement and industrial sulphuric acid; Specifically being meant and adopting five-stage cyclone preheater firer skill and " double conversion double absorption " pickling acid-making process, is the method that main material production has high white cement of whiteness and industrial sulphuric acid with desulfurated plaster, anhydrite, permanent white, siliceous raw material.
Background technology
The research of gypsum system sulfuric acid and cement technology started from for 20 beginnings of the century.1916; The Miu Le of Germany and wealthy exploitation plaster of paris system sulfuric acid and the cement technology received; Thereafter states such as Britain, France, Poland to build up with the plaster of paris, anhydrite and phosphogypsum in succession be raw material production sulfuric acid and cement; And put into production, owing to reasons such as productivity is low, backward in technique, energy consumption height, above-mentioned factory all closes stopping production.After the eighties, the technology that western developed country and production of phosphate fertilizer big country carry out phosphogypsum system producing sulfuric acid and jointly cement.China does not effectively solve from the begin one's study technology of the gypsum system of utilization sulfuric acid and cement of the fifties for some technological problems, fails to realize suitability for industrialized production for a long time.The northern Shandong chemical inc is through years of researches and arduous exploration; The end of the eighties; Successively grasped method, filled up the blank of China's gypsum relieving haperacidity technology, and obtained national inventing patent with salt gypsum, phosphogypsum, plaster of paris system producing sulfuric acid and jointly cement.The northern Shandong chemical inc was through technological innovation in recent years; Multinomial major scientific and technological achievements such as three grades of cyclone preheater kiln decomposing phosphogypsum system sulfuric acid and cement technology have been obtained again; The national demonstration project that it " produces 150000 tons of phosphorus ammoniums, 300,000 tons of cement of 200,000 tons of phosphogypsum system producing sulfuric acid and jointlies per year "; Went into operation in 1999, this project become advanced technology, scale in the world.2008, the Hunan was closed phosphorous chemical industry ltd and is innovated on this basis, had proposed to produce barium cement and sulfuric acid, i.e. " a kind of radiation proof cement, vitriolic working method " (number of patent application 200810031985.9) by desulfurized gesso of flue gas, anhydrite.
Summary of the invention
In order to utilize industrial residue, produce two kinds of high value added products---white cement and industrial sulphuric acid simultaneously, the present invention is to be main raw material with desulfurated plaster, permanent white, siliceous raw material, produce have the whiteness height, white cement and industrial sulphuric acid that intensity is high.Used proportion scheme is unusual, and raw material has desulfurated plaster, anhydrite, permanent white, siliceous raw material, carbonaceousmaterial.The present invention adopts five-stage cyclone preheater kiln calcining process and " double conversion double absorption " pickling acid-making process to produce; Be the working method of advanced reliable, the high efficiency of a kind of technology, non-secondary pollution, its main production equipments and facility are: raw material metering and conveying, raw material grind, cement kiln system, raw material, fuel, work in-process, storage of finished products facility, kiln gas purifies and drying, conversion, absorption equipment.
This employing five-stage cyclone preheater kiln calcining technology and " double conversion double absorption " pickling relieving haperacidity technology, use desulfurated plaster, anhydrite, permanent white, siliceous raw material following as main material production white cement and industrial sulphuric acid method technology:
(1), desulfurated plaster is carried out drying, remove whole free-waters and partial crystallization water in the desulfurated plaster, generate semi-hydrated gypsum, the entering storage vault, its water ratio is 6～9%;
(2), anhydrite is got into storage vault after crusher in crushing, to tail over massfraction be 0～20% to broken back anhydrite 20mm;
(3), tiff is got into storage vault after crusher in crushing, it is 0～20% that the tiff 20mm after the fragmentation tails over massfraction, also can purchase ground barium sulfate or industrial barium sulfate powder directly into the tiff storehouse;
(4), prepare raw material with getting into raw mill behind desulfurated plaster, anhydrite, permanent white, siliceous raw material, the reductant metering; Get into the raw material storage vault; Under the dryness, go into that each quality of material per-cent is in the kiln raw material: desulfurated plaster and anhydrite totally 30～90%, permanent white 0～30%, siliceous raw material 4～15%, reductive agent shared mass percent in going into the kiln raw material is 5～8%; Carbon-sulfur ratio is 0.60～0.75; Adopt five-stage cyclone preheater kiln calcining technology to produce cement clinker, the heat that can make full use of kiln tail tail gas reaches the fuel that sprays into from the kiln tail, will go into the kiln raw material and in 20 seconds, be preheating to 800 ℃～1000 ℃ rapidly by normal temperature; Kiln tail exhaust temperature is reduced to 300 ℃～350 ℃, and the standard coal consumption of ton grog is about 190～230 kilograms; Go into the kiln raw material and get into five-stage cyclone preheater; In preheater with from the hot flue gas of kiln tail, carry out heat exchange fully efficiently, the raw material powder separates entering kiln tail with flue gas under cf-and action of gravity then, sprays into fuel from kiln hood; The kiln internal heating is warming up to 900～1650 ℃; Under weakly reducing atmosphere, behind a series of physical-chemical reactions such as the preheating of material process, decomposition, calcining, obtain kiln gas and white cement clinker; In batching, introduce mineralizers such as permanent white, fluorite, the grog firing temperature can reduce by 50～150 ℃, SO in the kiln gas
2Gas concentration is up to 7.0～11.0%;
(5), the gained white cement clinker is through bleaching, behind the process for cooling, adds cement weight 2.0～4.5% gypsum and goes into cement grinding mill jointly, produces the whiteness height, the white cement that is used to decorate of intensity height and radioprotective characteristics; White cement SO
3Content be controlled in 1.8～3.5% scopes, specific surface area is 300～500m
2/ Kg; In batching, introduce mineralizer, to promoting C
3S forms, activation C
3S has a significant effect, and clinker quality is improved, and cement early strength approximately can improve 10～25%, and later strength improves 5～10% approximately;
(6), utilize SO in the kiln gas
2Produce sulfuric acid: from the kiln gas of white cement clinker calcination system dust precipitator behind high energy scrubber, packing tower washing, purifying; Remove the dust of carrying secretly in the flue gas; Again through the electrostatic precipitator demist; And dry with sulfuric acid, adopt " double conversion double absorption " pickling acid-making process that sulfur dioxide gas is processed industrial sulphuric acid at last; Promptly advancing convertor through purification, dried kiln gas carries out transforming the first time; After under the vanadium catalyst effect, the Sulphur Dioxide in the kiln gas being sulphur trioxide; Get into dry absorption section one and inhale tower; Using mass concentration is that the sulfur trioxide gas that 98% the circulation vitriol oil absorbs after transforming for the first time generates sulfuric acid product, and unconverted kiln gas completely captures through mist eliminator radially and goes to transform workshop section again behind the sour foam and carry out transforming second time, and the kiln gas after transforming for the second time advances dry absorption section two suction towers; Using mass concentration is that the 98% circulation vitriol oil absorbs the sulfur trioxide gas after transforming for the second time, produces sulfuric acid product.
Above-mentioned desulfurated plaster is meant that thermal power plant's coal furnace flue gas is a kind of to contain CaSO through what produce in the limestone slurry desulfurization treating processes
4.2H
2O is main, Fe
2O
3The industrial residue that content is low; Siliceous raw material refers to one or more mixtures in silicon sand, silica sand, white clay, agalmatolite, silica, the weathered feldspar; Carbonaceousmaterial is coke fines, industrial anthracitic coal or their mixture; Mineralizer is one or more mixtures in permanent white, fluorite, the sodium sulfate; The fuel that kiln tail and kiln hood are used is meant one or more mixtures in bituminous coal, hard coal, refinery coke, Sweet natural gas, the petrochemical industry oil.
Advantage of the present invention is:
(1), proportion scheme is unique, utilizing permanent white, desulfurated plaster, anhydrite, siliceous raw material, carbonaceousmaterial is that starting material are produced the white cement clinker co-producing sulfuric acid, the concentration of sulfur dioxide gas is up to 7.0～11.0% in the kiln gas;
(2), make full use of this industrial residue of desulfurated plaster, practiced thrift Nonrenewable resources, belong to the resource-conserving process method;
(3), SO in the kiln gas
2Gas gets into this technology acid making system, and transformation efficiency is high, can reach 99.6%;
(4), adopt five-stage cyclone preheater technology, can fully utilize the heat of kiln tail tail gas efficiently, will go into the kiln raw material and in 20 seconds, be preheating to more than 800 ℃ rapidly by normal temperature; Kiln tail exhaust temperature is reduced to about 320 ℃; Compare with three grades of cyclone preheater kilns, energy-conservation 6～10%, discharge CO less
2About gas 7%; Compare with the dry method hollow kiln that falls behind, energy-conservation about 20%, discharge CO less
2About gas 10%.Production institute water all recycles, and no waste water effluxes; The used sulfuric acid of pickling gets into the pickling recycle system, does not have and leaks, and free of losses belongs to environmentally friendly process method.
(5), in white cement production, mix permanent white, at first as mineralizer to promoting C
3S forms, activation C
3S has a significant effect, and clinker quality is improved, and cement early strength approximately can improve 10～25%; Later strength improves 5～10% approximately; The grog firing temperature be by can being reduced to 50～150 ℃ in addition, and the reduction of firing temperature is to energy-conservation very helpful, can energy-conservation 3～10%.Permanent white as raw material, makes and contains barium oxide in the grog in white cement is produced, and its stability, intensity and whiteness all can increase.
Description of drawings
Fig. 1 is white cement clinker and sulfuric acid production process schema.
Embodiment
One, this employing five-stage whirlwind preheating technology and " double conversion double absorption " pickling relieving haperacidity technology is the method for raw material production white cement clinker and industrial sulphuric acid with desulfurated plaster, tiff etc., and technology is seen Fig. 1, narrates as follows:
1, desulfurized gesso of flue gas is carried out drying, remove whole free-waters and partial crystallization water in the desulfurated plaster, generate semi-hydrated gypsum, its water ratio is 6～9%;
2, anhydrite is got into storage vault after crusher in crushing, it is 0～20% that broken back anhydrite 20mm tails over massfraction;
3, tiff is got into storage vault after crusher in crushing, it is 0～20% that the tiff 20mm after the fragmentation tails over massfraction, also can purchase ground barium sulfate or industrial barium sulfate powder directly into the tiff storehouse;
4, desulfurated plaster, anhydrite, permanent white, siliceous raw material, hard coal metering back are got into raw mill and prepare raw material; Get into the raw material storage vault; Under the dryness, each quality of material per-cent is in the raw material: desulfurated plaster and anhydrite 30～90%, permanent white 0～30%, a kind of siliceous raw material or its mixture 4～15%.Hard coal shared mass percent in raw material is 5～8%, and carbon-sulfur ratio is 0.60～0.75;
5, adopt five-stage cyclone preheater kiln calcining technology to produce cement clinker, can make full use of the heat of kiln tail tail gas, will go into the kiln raw material and in 20 seconds, be preheating to more than 800 ℃ rapidly by normal temperature; Kiln tail exhaust temperature is reduced to about 320 ℃; Ton grog standard coal consumption is about 200 kilograms: go into the kiln raw material and get into five-stage cyclone preheater, in preheater with from the hot flue gas of kiln tail and the fuel that sprays into from the kiln tail, carry out heat exchange fully efficiently, the raw material powder separates entering kiln tail with flue gas under cf-and action of gravity then; Spraying into coal dust from kiln hood acts as a fuel; The kiln internal heating is warming up to 900～1650 ℃, under weakly reducing atmosphere, behind a series of physical-chemical reactions such as the preheating of material process, decomposition, calcining; Obtain kiln gas and white cement clinker, SO in the kiln gas
2Gas concentration is up to 7.0～11.0%;
6, the gained white cement clinker is gone into cement grinding mill with 2.0～4.5% gypsum jointly behind bleaching, process for cooling, produces to decorate and uses white cement, white cement SO
3Content be controlled in 1.8～3.5% scopes, specific surface area is 300～500m
2/ Kg;
7, from the kiln gas of dust precipitator behind high energy scrubber, packing tower washing, purifying; Remove the dust of carrying secretly in the flue gas; Again through the electrostatic precipitator demist; And dry with sulfuric acid, adopt " double conversion double absorption " acid cleaning process that sulfur dioxide gas is processed industrial sulphuric acid at last: promptly through purify, dried kiln gas advances receiver and carries out conversion first time, under the vanadium catalyst effect, the Sulphur Dioxide in the kiln gas is sulphur trioxide after; Get into dry absorption section one and inhale tower; Using mass concentration is that the sulfur trioxide gas that 98% the circulation vitriol oil absorbs after transforming for the first time generates sulfuric acid product, and unconverted kiln gas completely captures through mist eliminator radially and goes to transform workshop section again behind the sour foam and carry out transforming second time, and the kiln gas after transforming for the second time advances dry absorption section two suction towers; Using mass concentration is that the 98% circulation vitriol oil absorbs the sulfur trioxide gas after transforming for the second time, produces sulfuric acid product.
Two, the preparation of white cement and performance thereof
1, starting material Chemical Composition such as the used desulfurated plaster of feed proportioning, tiff, siliceous raw material are seen table 1.
Table 1: starting material Chemical Composition table (unit: quality %)
| Title | LOSS | BaO | CaO | Fe 2O 3 | Al 2O 3 | SiO 2 | MgO | SO 3 | Σ |
| Tiff | 1.64 | 54.24 | 7.89 | 0.20 | 0.62 | 5.99 | 0.07 | 28.98 | 99.63 |
| Desulfurated plaster | 19.75 | \ | 32.94 | 0.12 | 0.39 | 0.82 | 0.24 | 44.25 | 98.51 |
| Anhydrite | 8.2 | \ | 33.92 | 0.07 | 1.56 | 10.49 | 0.28 | 43.81 | 98.33 |
| Siliceous raw material | 0.24 | \ | 12.97 | 0.06 | 14.59 | 70.45 | 0.16 | \ | 98.47 |
| Reductive agent | 72.4 | \ | 2.94 | 1.12 | 8.05 | 13.22 | 0.38 | 0.63 | 98.74 |
2, the carbon containing matter that is used to do reductive agent is industrial anthracitic coal or coke fines, and the hard coal carbon content is 60%～73%, and the coke carbon content is 70%～85%.Anthracitic simple and easy technical analysis is: ash: 20～26%, and fugitive constituent: 4%～10%, thermal value is: 22500～25000 KJ/Kg (as analysed basis), 21800～24400 KJ/Kg (as).The simple and easy technical analysis of coke fines is: ash: 5～20%, and fugitive constituent: 0%～5%, thermal value is: 23500～26500 KJ/Kg (as analysed basis), 22800～26000 KJ/Kg (as).
3, fuel is with one or more mixtures in bituminous coal, hard coal, refinery coke, Sweet natural gas, the petrochemical industry oil.Its simple and easy technical analysis composition is: ash: 1～10%, and volatile matter: >=25%, thermal value is: 25000～40000 KJ/Kg (as analysed basis).
4, go into preceding raw material of kiln and fuel fineness quality index and see table 2.
Table 2: material fineness (unit: quality %)
| Name of material | 0.20mm tail over | 0.08mm tail over |
| Raw material | ≤13.0 | ≤3.5 |
| Bituminous coal | ≤21.0 | ≤6.0 |
5, designed following three kinds of feed proportioning schemes: desulfurated plaster and anhydrite 30～90%, tiff 0～30%, a kind of siliceous raw material or its mixture 4～15%, go into kiln raw material chemical ingredients and see table 3.Hard coal or coke fines are as reductive agent, and the mass percent that volume accounts for into the kiln raw material is 5～7%, and carbon-sulfur ratio is 0.60～0.75.
Table 3: raw material Chemical Composition (unit: quality %)
| Title | LOSS | BaO | CaO | Fe 2O 3 | Al 2O 3 | SiO 2 | MgO | SO 3 | Σ |
| Scheme 1 | 12.29 | 5.42 | 26.62 | 0.18 | 2.28 | 8.93 | 0.22 | 35.68 | 98.63 |
| Scheme 2 | 17.08 | 3.25 | 28.33 | 0.17 | 2.24 | 9.74 | 0.24 | 37.36 | 98.41 |
| Scheme 3 | 20.77 | 0 | 28.78 | 0.18 | 2.50 | 9.60 | 0.24 | 36.46 | 98.52 |
6, preparation homogenizing good kiln raw material of going into get into five-stage cyclone preheater through handling equipment, in preheater, carry out heat exchange fully efficiently with hot flue gas from the kiln tail, and the raw material powder separates back entering kiln tail with flue gas under cf-and action of gravity then; Spray into coal dust from kiln hood and make fuel; The kiln internal heating is warming up to 900～1650 ℃, and material equates that through preheating, decomposition, calcining, solid, liquid a series of physical-chemical reactions obtain white cement clinker, and air-flow is circulated in order; Keep weakly reducing atmosphere; Kiln gas gets into " double conversion double absorption " acid-making process system behind washing, purifying, make sulfuric acid.The white cement clinker Chemical Composition is seen table 4.
Table 4: white cement clinker Chemical Composition
| Title | LOSS | BaO | CaO | Fe 2O 3 | Al 2O 3 | SiO 2 | MgO | SO 3 | Σ |
| Scheme 1 | 0.45 | 12.00 | 58.94 | 0.46 | 5.10 | 19.94 | 0.50 | 0.87 | 98.26 |
| Scheme 2 | 0.74 | 7.11 | 62.01 | 0.42 | 4.95 | 21.49 | 0.54 | 0.62 | 97.88 |
| Scheme 3 | 0.55 | 0 | 67.10 | 0.46 | 5.87 | 22.54 | 0.56 | 0.77 | 97.85 |
Visible by last table, the grog chemical ingredients as follows (unit: quality %):
LOSS：0～1.5 BaO：0～30 ?CaO：45～69 SiO
2：18～28
Fe
2O
3：0～1.5 Al
2O
3：2.0～7.0 MgO：?0～2 SO
3：0～2.5
7, white cement clinker is gone into the grog storage vault behind bleaching, process for cooling, and grog and 2.0～4.5% gypsum are got into cement grinding mill through handling equipment, processes to have the white cement product, white cement SO
3Content be controlled in 1.8～3.3% scopes, specific surface area should be greater than 300～500m
2/ Kg.This white cement density is high, helps improving cement and the concrete barrier propterty to radioactive radiations such as r ray, x rays, and whiteness is greater than 87%, and intensity is high, good stability.
8, white cement physicals and detected result such as table 5.
Table 5: white cement quality testing performance
Claims (4)
1. a white cement, vitriolic working method; Adopt five-stage whirlwind preheating technology and " double conversion double absorption " pickling relieving haperacidity technology; With desulfurated plaster, anhydrite, permanent white, siliceous raw material is the method for ornamental white cement of main material production and industrial sulphuric acid, it is characterized in that:
(1), desulfurized gesso of flue gas is carried out drying, remove whole free-waters and partial crystallization water in the desulfurated plaster, the generation semi-hydrated gypsum, its water ratio is 6～9%;
(2), anhydrite is got into storage vault after crusher in crushing, it is 0～20% that the anhydrite 20mm after the fragmentation tails over massfraction;
(3), tiff is got into storage vault after crusher in crushing, it is 0～20% that the tiff 20mm after the fragmentation tails over massfraction, also can purchase ground barium sulfate or industrial barium sulfate powder directly into the tiff storehouse;
(4), prepare raw material with getting into raw mill behind desulfurated plaster, anhydrite, permanent white, siliceous raw material, the reductant metering; Get into the raw material storage vault; Under the dryness, go into that each quality of material per-cent is in the kiln raw material: desulfurated plaster and anhydrite totally 30～90%, permanent white 0～30%, siliceous raw material 4～15%, reductive agent shared mass percent in going into the kiln raw material is 5～8%; Carbon-sulfur ratio is 0.60～0.75; Adopt five-stage cyclone preheater kiln calcining technology to produce cement clinker, the heat that can make full use of kiln tail tail gas reaches the fuel that sprays into from the kiln tail, will go into the kiln raw material and in 20 seconds, be preheating to 800 ℃～1000 ℃ rapidly by normal temperature; Kiln tail exhaust temperature is reduced to 300 ℃～350 ℃, and the standard coal consumption of ton grog is about 190～230 kilograms; Go into the kiln raw material and get into five-stage cyclone preheater; In preheater with from the hot flue gas of kiln tail, carry out heat exchange fully efficiently, the raw material powder separates entering kiln tail with flue gas under cf-and action of gravity then, sprays into fuel from kiln hood; The kiln internal heating is warming up to 900～1650 ℃; Under weakly reducing atmosphere, behind a series of physical-chemical reactions such as the preheating of material process, decomposition, calcining, obtain kiln gas and white cement clinker; In batching, introduce mineralizers such as permanent white, fluorite, the grog firing temperature can reduce by 50～150 ℃, SO in the kiln gas
2Gas concentration is up to 7.0～11.0%;
(5), the gained white cement clinker is through bleaching, behind the process for cooling, adds cement weight 2.0～4.5% gypsum and goes into cement grinding mill jointly, produces the whiteness height, the white cement that is used to decorate of intensity height and radioprotective characteristics; White cement SO
3Content be controlled in 1.8～3.5% scopes, specific surface area is 300～500m
2/ Kg; In batching, introduce mineralizer, to promoting C
3S forms, activation C
3S has a significant effect, and clinker quality is improved, and cement early strength approximately can improve 10～25%, and later strength improves 5～10% approximately;
(6), utilize SO in the kiln gas
2Produce sulfuric acid.
2. a kind of white cement according to claim 1, vitriolic working method is characterized in that: above-mentioned desulfurated plaster is meant that thermal power plant's coal furnace flue gas is a kind of to contain CaSO through what produce in the limestone slurry desulfurization treating processes
4.2H
2O is main, Fe
2O
3The industrial residue that content is low; Siliceous raw material refers to one or more mixtures in silicon sand, silica sand, white clay, agalmatolite, silica, the weathered feldspar; Carbonaceousmaterial is coke fines, industrial anthracitic coal or their mixture; Mineralizer is one or more mixtures in permanent white, fluorite, the sodium sulfate; The fuel that kiln tail and kiln hood are used is meant one or more mixtures in bituminous coal, hard coal, refinery coke, Sweet natural gas, the petrochemical industry oil.
3. a kind of white cement according to claim 1, vitriolic working method is characterized in that: the white cement clinker Chemical Composition is following, unit: quality %:
LOSS：0～1.5 BaO：0～30 ?CaO：45～69 SiO
2：18～28
Fe
2O
3：0～1.5 Al
2O
3：2.0～7.0 MgO：?0～2 SO
3：0～2.5?。
4. a kind of white cement according to claim 1, vitriolic working method is characterized in that: utilize the SO in the kiln gas
2It is following to produce the vitriolic step: from the kiln gas of dust precipitator behind high energy scrubber, packing tower washing, purifying; Remove the dust of carrying secretly in the flue gas; Again through the electrostatic precipitator demist, and with the sulfuric acid drying, adopt " double conversion double absorption " acid cleaning process that sulfur dioxide gas is processed industrial sulphuric acid at last; " double conversion double absorption " pickling producing and manufacturing technique is meant: advance convertor through purification, dried kiln gas and carry out transforming the first time; After under the vanadium catalyst effect, the Sulphur Dioxide in the kiln gas being sulphur trioxide; Get into dry absorption section one and inhale tower; Using mass concentration is that the sulfur trioxide gas that 98% the circulation vitriol oil absorbs after transforming for the first time generates sulfuric acid product; Unconverted kiln gas completely captures through mist eliminator radially and goes to transform workshop section again behind the sour foam and carry out transforming the second time, and the kiln gas after transforming for the second time advances dry absorption section two and inhales towers, and using mass concentration is that the sulfur trioxide gas that the 98% circulation vitriol oil absorbs after transforming for the second time generates sulfuric acid product.
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| CN101353233A (en) * | 2008-08-01 | 2009-01-28 | 湖南石门特种水泥有限公司 | Radiation protection cement and sulphuric acid production method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101353233A (en) * | 2008-08-01 | 2009-01-28 | 湖南石门特种水泥有限公司 | Radiation protection cement and sulphuric acid production method |
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| CN103193516A (en) * | 2013-04-28 | 2013-07-10 | 雷志刚 | Method for preparing potassium sulphate fertilizer and co-producing special cement from potassium rock |
| CN103193516B (en) * | 2013-04-28 | 2016-06-22 | 雷志刚 | A kind of method utilizing potash feldspar to manufacture potassium sulphate fertilizer coproduction special cement |
| CN103193517B (en) * | 2013-04-28 | 2016-06-22 | 雷志刚 | Utilize the method that potash feldspar produces potash fertilizer coproduction special cement |
| CN103922627A (en) * | 2014-03-31 | 2014-07-16 | 济南大学 | Method for improving gelling property of high belite cement clinker |
| CN107555462A (en) * | 2017-08-21 | 2018-01-09 | 赵阳臣 | A kind of method of calcined soda waste residue comprehensive reutilization |
| CN110000187A (en) * | 2019-03-20 | 2019-07-12 | 贵州红星发展股份有限公司 | A kind of barium dregs innocent treatment method |
| CN113371721A (en) * | 2021-07-21 | 2021-09-10 | 青岛美高集团有限公司 | Green and cyclic production method of silica gel |
| CN115057635A (en) * | 2022-07-14 | 2022-09-16 | 河北鼎星水泥有限公司 | High-strength cement clinker and production process thereof |
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