CN87108216A - The method of making cement from ammonia-soda fag-end - Google Patents
The method of making cement from ammonia-soda fag-end Download PDFInfo
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- CN87108216A CN87108216A CN87108216.0A CN87108216A CN87108216A CN 87108216 A CN87108216 A CN 87108216A CN 87108216 A CN87108216 A CN 87108216A CN 87108216 A CN87108216 A CN 87108216A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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Abstract
The invention belongs to the comprehensive utilization of waste residue in the solvay soda process soda ash production process, this is that waste residue is handled the commercial run of directly producing ordinary Portland cement more than No. 425 as the cement basic raw material without any method, 40～70% waste residues add auxiliary materials such as limestone powder ashes, clay, through the raw material preparation, four operations such as mechanical dehydration balling-up, calcining, vent gas treatment are produced cement, so the method for making cement from ammonia-soda fag-end of the present invention is the good method of not only having produced cement but also having handled waste residue in a large number.
Description
The invention belongs to the comprehensive utilization of waste residue in the solvay soda process soda ash production process.
Solvay soda process soda ash produces because its production technology maturation, raw material sources are abundant, characteristics such as good product quality, so far product still occupies first of world's soda ash production, it is low that yet its disadvantage is a raw material availability, the discharging of waste liquid amount is big, and its quantity discharged is that one ton of soda ash of every production gives off liquid and waste slag produced 9～11m approximately
3, wherein containing solid slag 300～600kg, world's soda ash output is about 3,000 ten thousand tons at present, and wherein solvay soda process soda ash is about 2,000 ten thousand tons, and 200,000,000 m are just arranged every year
3Ammoniacal liquor waste residue row to the Nature, cause the harm of the wasting of resources and serious environmental, especially waste residue, pile up the tract that accounts for throughout the year, enter the trouble of ocean, rivers and creeks formation " white sea ", therefore number of research projects is being done aspect the liquid and waste slag produced comprehensive utilization in countries in the world, and for example DD139590 has introduced the hydrocarbonate (Na that waste residue is processed into alkali and alkaline-earth metal
2CO
3CaCO
3), and waste residue is done the method for fodder additives; The Soviet Union and Japan utilize waste residue system lime; US2474381 has proposed to add pitch system roof slab with waste residue, the method for bituminous concrete and pavior; Waste residue also can have box dam to make ground, the purposes on pad ground, and domestic manufacturer utilizes alkaline residue to do building materials such as the chemical plant, Dalian utilizes waste residue to do carbonated lime brick, and building material industry company in Tianjin has developed the highly basic slag matrix material and has applied for Chinese patent; Utilize waste residue system calcium fertilizer in addition or mix fertilizer or the like, more than various approach belong to experimental study mostly, not mature enough or cost is crossed high energy few in industrial realization because of technology, have only and produce this method of cement and implement in the Soviet Union, Soviet Union Si Jieli tower Marx restrains soda ash cement associated enterprises and has built up 80,000 tons of waste residue system cement plant of an annual output in 1977, because the long-term big area of waste residue is stacked, expose to the sun and rain, dried again after the infiltration, become " white sea ", wherein alkaline substance content is no more than 1.0%, so can be cement raw material with 50%～100% waste residue replacing lime masonry, its manufacturing process be compared no special part with general cement manufacturing process.
The invention provides a kind of chloride content is 5～13%, moisture content is the method that 60～70% waste residue is produced ordinary Portland cement more than No. 425, because the waste residue consumption accounts for 60～70% of total raw material consumption, therefore it is the good method of a large amount of processing ammonia alkali waste residues, is again to turn waste into wealth to produce the good approach of cement products.
Its technology of making cement from ammonia-soda fag-end method of the present invention is divided into four parts: raw material preparation technology (claiming that again wet method prepares slurry process); Mechanical dewatering balling process; Calcining process; Tail gas treatment process; Process flow diagram such as accompanying drawing.
Ammonia alkali waste residue (40～70%), siliceous material, calcareous material combines with single mill by single mill of ball mill (1) wet method (adding water) or part mix grinding and raw material is worn into slip is stored in the slurry tank, by the prescription requirement slip being made into qualified charge pulp is stored in the slurry tank (2), with pump slip is delivered to mechanical dehydration device (3) then, raw material cake after dehydration is delivered to nodulizer (4) again, (these raw material also can be without the nodulizer balling-up to make the pellet of 5～20mm particle diameter, raw material cake fragmentation after will dewatering by a shredder assembly), by chapelet and disk feeder raw material ball is sent into cement kiln (5) calcining, cement clinker after the calcining is sent to the grog awning after cooling, this cement clinker adds that gypsum and adulterant (as slag) can be packaged into cement products through ball mill (6) pulverize; From cement kiln (5) tail gas discharged temperature is 400～800 ℃, this tail gas is removed the sedimentation of macrobead raw material by smoke-box (7), cyclonic separator (8) further separates tail gas, replace interchanger (9) exhaust temperature to be reduced to about 200 ℃ through interchanger (9) or with waste heat boiler again, absorb obnoxious flavour through washer (10) washing again from interchanger (9) tail gas discharged, at this moment tail gas can pass through chimney (11) emptying.
The raw material preparation technology purpose of making cement from ammonia-soda fag-end of the present invention is with waste residue, siliceous material (flyash, clay), calcareous material (as Wingdale), preparation of raw material such as iron powder go out to meet cement clinker saturation factor KH=0.88 ± 0.02, aluminium-oxygen modulus P=1.1～1.9, the qualified raw material of silicate ratio n=1.5～2.5, specific practice is to determine the percentage ratio of other several raw material add-ons according to waste residue composition and add-on thereof, perhaps fix the percentage ratio of determining other raw material add-ons after the butt ratio of components of two kinds of main raw materials again, its technic index slip degree of mobilization of making a living is below the 100mm, moisture content is below 70%, and fineness 4900 hole sizer excess are below 10%.
The purpose of the mechanical dewatering balling process of making cement from ammonia-soda fag-end of the present invention is to make water content of crude material slurry drop to 35～40%, and can make spherical pellet, and charge pulp must be earlier by mechanical dehydration for this reason, and the present invention has adopted 150m
2Plate-and-frame filter press dewaters, and the press filtration pressure-controlling is at 0.7 MPa (8kg/cm
2), the raw material cake moisture content that comes out through plate-and-frame filter press has dropped to 35～40%, can meet the calcining requirement of cement kiln more fully through the raw material ball (or raw material piece) of balling-up (or broken).
The primary device of the calcining process of making cement from ammonia-soda fag-end of the present invention is cement kiln (5), because waste residue is as the main raw material of system cement, the forming process of its cement clinker both had been same as the formation of silicate cement, the characteristics that have itself again, promptly ungirding at the silicate branch not only has the decomposition of silicate, also is attended by CaCl in the waste residue
2Hydrolysis, its reaction formula is:
Therefore the variation of fcao does not resemble and a peak is arranged the ordinary Portland cement in the waste residue producing cement clinker forming process, and the phenomenon of a side slope is from high to low just arranged, and data see Table 1
The variation of table 1 calcining temperature and fcao
The variation of table 1 calcining temperature and fcao
Contain muriate and alkaline metal salt in addition in the waste residue, ferro-aluminate and silicate are formed early, speed is very fast, therefore must strictly grasp process conditions and just can make the qualified silicate cement more than No. 425.Having adopted specification in the waste residue system cement process of the present invention is that the cement kiln of 1.2 * 26 meters of φ has been done production test, and the installation gradient of kiln is that 3 degree (suitable 7%) control speed range are 0.38～1.9 rev/min.The raw material sintering temperature of waste residue system cement changes with the variation of saturation factor KH, and for the calcining of the raw material that adapt to different ingredients, temperature of kiln head is controlled at 1250～1450 ℃.Not only dechlorination was good when kiln end temperature was higher than 700 ℃, raw material pre-burning, and the formation of non-sodium chloride, but the loss of temperature hyperthermia is big, takes all factors into consideration kiln end temperature and is controlled at 400～800 ℃ for good.Material depends on the rotating speed of kiln at kiln residence time, and for material has enough residence time and pre-burning abundant in kiln, the rotating speed of kiln for well, but is considered the throughput of kiln with low again, and the rotating speed of kiln is advisable with 1 rev/min, about 2 hours of residence time of material.The operation index control of concluding cement kiln is as follows:
Temperature of kiln head: 1250～1450 ℃
Kiln end temperature: 400～800 ℃
Rotating speed: 1 rev/min
Residence time of material: about 2 hours
The tail gas treatment process major equipment of making cement from ammonia-soda fag-end of the present invention is smoke-box (7), cyclonic separator (8), interchanger or waste heat boiler (9), washer (10), chimney (11), its handling principle is to utilize smoke-box and cyclonic separator to remove raw material dust in the gas, lower the temperature with interchanger, absorb obnoxious flavour (as HCl) in the tail gas with the washer washing, then pass through chimney emptying, the about 10000m of exhaust flow
3/ H, temperature is 400～800 ℃, and the gas temperature that comes out from washer is below 40 ℃, and HCl content is lower than 0.02% after testing, and its quantity discharged meets country's industry " three wastes " discharging tentative standard GBJ4-3 fully.
If add potassium felspar sand in the raw material, then between the interchanger of vent gas treatment part and washer, add a sack cleaner absorption of K CL and obtain the KCL product, interchanger can adopt water-cooling pattern or air cooling mode, thereby its preheated air can be used as the secondary vapour of cement kiln and cuts down the consumption of energy, the structure formation of interchanger can be carried out reasonable selection, and also available waste heat boiler recovery waste heat, the absorption agent in the washer should adopt and contain alkaline liquid, as adopting the waste ammonia-soda solution supernatant liquor, its major ingredient removes CaCL
2Outside NaCL, still contain Ca(OH)
2
The main raw material waste residue of making cement from ammonia-soda fag-end of the present invention is to adopt " lime low bank between fields " (based on the waste residue) piled up for many years, also can adopt directly discharge in the ammonia alkali production process liquid and waste slag produced, get its underflow (waste residue after concentrating) and carry out the raw material preparation through multistage clarification.
Making cement from ammonia-soda fag-end raw material composition of the present invention sees Table 2.
Table 2
| Classification | Title | Chemical Composition % | |||||
| SiO 2 | AL 2O 3 | Fe 2O 3 | CaO | MgO | CL | ||
| Calcareous material | The waste residue Wingdale | 5～11 5～11 | 1～3 0.4～3 | 1～3 1～3 | 38～42 46～52 | 3.5～7 1.5～2.5 | 5～13 |
| Siliceous material | The flyash clay | 46～50 64 | 20～30 17 | 4～9 6 | 2～4 2 | Below 1 below 1 | |
Embodiment 1
With 50% waste residue, Wingdale 38～42%, flyash 8～12% is raw material, press grog saturation factor KH=0.88 ± 0.02, aluminium-oxygen modulus P=1.1～1.9, silicate ratio n=1.5～2.5 preparation raw material, the water content of crude material slurry of preparation is 65～70%, going into kiln raw material moisture content is 35～40%, and the silicate cement folding strength of production is at 70kg/cm
2More than, ultimate compression strength is at 500kg/cm
2More than, cement performance sees Table 3, the data of 1-1,1-2 in the table 4.
With 70% waste residue, Wingdale 18～22%, flyash 8～12% is raw material, presses grog KH=0.88 ± 0.02, P=1.1～1.9, n=1.5～2.5 preparation raw material, the water content of crude material slurry of preparation is 70～75%, going into kiln raw material moisture content is 35～40%, and the silicate cement folding strength of production is at 64kg/cm
2More than, ultimate compression strength is at 425kg/cm
2More than, cement performance sees Table 3, the data of 2-1,2-2 in the table 4.
With 50% waste residue, Wingdale 40%, iron powder 2%, flyash 5%, clay 3% is a raw material, press grog KH=0.87 ± 0.02, P=1.1～1.9, n=1.5～2.5 preparation raw material, the water content of crude material slurry of preparation is 65～70%, going into kiln raw material moisture content is 35～40%, and the silicate cement folding strength of production is at 66kg/cm
2More than, ultimate compression strength is at 521kg/cm
2More than, cement performance sees Table 3, the data of 3-1 3-2 in the table 4.
Embodiment 4
With 40% waste residue, 56% Wingdale, 4% clay is raw material, press grog KH=0.88 ± 0.02, P=1.1～1.9, n=1.5～2.5 preparation raw material, the water content of crude material slurry of preparation is 60～70%, going into kiln raw material moisture content is 35～40%, and the silicate cement folding strength of production is at 81kg/cm
2More than, ultimate compression strength is at 650kg/cm
2More than, cement performance sees Table 3,4-1 in the table 4, the data of 4-2.
Claims (5)
1, (waste reside comprehensive utilization) method of a kind of making cement from ammonia-soda fag-end, it is to be the main raw material of preparation cement with waste residue replacing lime masonry, the present invention is characterised in that chloride 5～13% in this waste residue, moisture content 60～70%, without any processing directly as main raw material, its add-on is 40～70%, adds calcareous, siliceous material, prepares ordinary Portland cement more than No. 425 by raw material preparation technology, mechanical dewatering balling process, calcining process, tail gas treatment process.
2, according to the method for the described making cement from ammonia-soda fag-end of claim 1, it is characterized in that proportioning raw materials adopts 50% waste residue, 38～42% Wingdale, 8～12% flyash, the water content of crude material slurry of preparation is 65～70%, going into kiln raw material moisture content is 35～40%.
3, according to the method for the described making cement from ammonia-soda fag-end of claim 1, it is characterized in that proportioning raw materials adopts 70% waste residue, 18～22% Wingdales, 8～12% flyash, the water content of crude material slurry of preparation is 70～75%, going into kiln raw material moisture content is 35～40%.
4, according to the method for the described making cement from ammonia-soda fag-end of claim 1, it is characterized in that proportioning raw materials adopts 50% waste residue, 40% Wingdale, 2% iron powder, 5% flyash, 3% clay, the water content of crude material slurry of preparation is 65～70%, going into kiln raw material moisture content is 35～40%.
5, according to the method for the described making cement from ammonia-soda fag-end of claim 1, it is characterized in that proportioning raw materials adopts 40% waste residue, 56% Wingdale, 4% clay, the water content of crude material slurry of preparation is 60～70%, going into kiln raw material moisture content is 35～40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87108216A CN1014784B (en) | 1987-12-29 | 1987-12-29 | Method of making cement from ammonia-soda fag-end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87108216A CN1014784B (en) | 1987-12-29 | 1987-12-29 | Method of making cement from ammonia-soda fag-end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87108216A true CN87108216A (en) | 1988-12-21 |
| CN1014784B CN1014784B (en) | 1991-11-20 |
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ID=4816418
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87108216A Expired CN1014784B (en) | 1987-12-29 | 1987-12-29 | Method of making cement from ammonia-soda fag-end |
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| Country | Link |
|---|---|
| CN (1) | CN1014784B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051535C (en) * | 1996-02-02 | 2000-04-19 | 王师祥 | Production of cement by waste gas and dregs from artificial gas |
| CN101830650A (en) * | 2010-04-30 | 2010-09-15 | 汪晋强 | Method for manufacturing cement main material and additive material from calcined soda residues |
| CN101830651A (en) * | 2010-04-30 | 2010-09-15 | 汪晋强 | Method for manufacturing cement clinker, retarder and cement from calcined soda residues |
| CN102092972A (en) * | 2010-04-30 | 2011-06-15 | 汪晋强 | Method for synthesizing cement clinker, auxiliary material and cement by using waste soda ash residues and waste evaporated ammonia liquid |
| CN101607796B (en) * | 2009-07-30 | 2011-08-03 | 北京金隅红树林环保技术有限责任公司 | Method for producing low alkali cement by using high alkali raw materials |
| WO2023097118A1 (en) * | 2021-11-29 | 2023-06-01 | Enviro Water Minerals Company, Inc. | Sustainable desalination systems and methods using carbon dioxide captured from a flue gas |
-
1987
- 1987-12-29 CN CN87108216A patent/CN1014784B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051535C (en) * | 1996-02-02 | 2000-04-19 | 王师祥 | Production of cement by waste gas and dregs from artificial gas |
| CN101607796B (en) * | 2009-07-30 | 2011-08-03 | 北京金隅红树林环保技术有限责任公司 | Method for producing low alkali cement by using high alkali raw materials |
| CN101830650A (en) * | 2010-04-30 | 2010-09-15 | 汪晋强 | Method for manufacturing cement main material and additive material from calcined soda residues |
| CN101830651A (en) * | 2010-04-30 | 2010-09-15 | 汪晋强 | Method for manufacturing cement clinker, retarder and cement from calcined soda residues |
| CN102092972A (en) * | 2010-04-30 | 2011-06-15 | 汪晋强 | Method for synthesizing cement clinker, auxiliary material and cement by using waste soda ash residues and waste evaporated ammonia liquid |
| WO2023097118A1 (en) * | 2021-11-29 | 2023-06-01 | Enviro Water Minerals Company, Inc. | Sustainable desalination systems and methods using carbon dioxide captured from a flue gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1014784B (en) | 1991-11-20 |
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