CN85102767A - The moulded coal heating and producing cement chamotte simultaneously - Google Patents
The moulded coal heating and producing cement chamotte simultaneously Download PDFInfo
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- CN85102767A CN85102767A CN85102767.9A CN85102767A CN85102767A CN 85102767 A CN85102767 A CN 85102767A CN 85102767 A CN85102767 A CN 85102767A CN 85102767 A CN85102767 A CN 85102767A
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- coal
- boiler
- moulded coal
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- cement clinker
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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
Abstract
Affiliated technical field: coal comprehensive utilization, stove.
The present invention is a kind of new technology of utilizing high sulfur coal resource or general coal resource.Main points are the chemical ingredientss by raw coal, add calcium carbonate and other cooperation raw material and additive, after pulverizing mixes, with pressurization or additive method moulding, are made for moulded coal; Make moulded coal have horizontal feed or near the furnace apparatus or the steam generating plant internal combustion of the static ventilative burning of horizontal feed bed, because calcium carbonate cooperates the effect of raw material and additive, a part of sulphur is fixed in the slag in the coal, sulfurous gas reduces in the waste gas; Device is when obtaining heat energy or steam, and the slag of moulded coal is calcined becomes cement clinker.
Description
Affiliated technical field: coal comprehensive utilization, stove.
Coal is the important energy source that must rely on for a long time from now on.But it is not high directly to burn the coal heat energy utilization ratio.And often cause environmental pollution.Therefore, must adopt the economic utilization measure of coal and the innoxious technical measures of coal from now on.Because the purposes of coal resource itself and coal is diversified, the innoxious technical measures of the economic utilization measure of coal and coal will be diversified from now on.Resembling China has the big country that enriches coal resource like this, must utilize technology by the various coal resources of researchdevelopment.
The present invention is a kind of new technology of utilizing high-sulfur ash coal resource, certainly, also is applicable to the coal resource that sulphur and ash content are lower.Main points are the chemical ingredientss by raw coal, add calcium carbonate and other cooperation raw material and additive, after pulverizing mixes, with pressurization or additive method moulding.Be made for moulded coal; Make moulded coal have horizontal feed or near the combustion unit of the ventilative static bed of horizontal feed or boiler in burn.Because the effect of calcareous raw material and additive.A part of sulphur is fixed in the slag in the coal, and the sulfurous gas in the waste gas reduces; Device is when obtaining heat energy or steam, and the slag of moulded coal is calcined becomes cement clinker.Like this, both reduced the pollution of sulfurous gas and waste residue, obtained heat energy and cement again simultaneously environment.Fully utilized coal resource.
At present, home and overseas had had and utilizes cinder as cement raw material and utilize calcareous raw material as the practical experience of coal desulfurization agent and research report. Enumerate below the technology that these aspects have occurred, in order to compare with the present invention.
With utilize flyash and make the comparison of cement technology: the coal dust of pulverized coal power boiler, after the boiler internal combustion, ash is divided into the solia particle sedimentation.Settled ash content has passed through the calcining of comparatively high temps, has the hydraulicity in late period, after cooperating the common pulverizing of suitable cement clinker or lime and additive, can make what is called " pulverized fuel ash cement " sixties to the seventies, more domestic power plant are when the preparation coal dust, and test once adds calcium carbonate and other cooperate raw material.The flyash that the test calcining has the better hydraulicity in boiler of power plant.The test of this class confirms, in the flyash composition that general power plant makes with the cooperation coal dust, the rigid mineral content of early water is still very low.Early water is rigid still far below silicate cement, and this is the flyash of producing owing to this method, though all roughly meet the requirement of producing silicate cement aspect the temperature three in material chemical component prescription, smashing fineness and boiler; But coal powder fraction and cooperate each particle of raw material, dispersion suspension separately in the high-temperature fuel gas of boiler furnace can not contact mutually.If thereby have suitable chemical ingredients in a particle, this particle just can change the cement clinker particle into, and general cooperation coal dust is when the stove inner suspension, though near each particulate average assay meets the requirements, each particulate component is also undesirable, can not be transformed into qualified cement clinker particle.The method applied in the present invention is different with above-mentioned flyash.Ash content of coal particulate in the moulded coal and the various particulates that cooperate raw material, in heat-processed, can fully contact mutually, can be the same with traditional cement clinker production kiln, before liquid phase occurs with after, fully finish the chemical reaction of various necessity, generate hydraulicity mineral, make qualified cement clinker.
Produce cement additive relatively with wet bottom boiler: since the sixties, many slags that utilize wet bottom boiler have been arranged, as the example of cement raw material.In recent years, the domestic people of having did to increase in the used coal dust of wet bottom boiler the test of calcium.This class test confirms: increase calcium in slag tapping boiler, can reduce the sulfurous gas in the waste gas, also can improve the hydraulicity of slag; But can not burn till slag and be cement clinker.This is because the physical and chemical process that requires in physical and chemical process that requires in the slag tapping boiler and the cement clinker production unit is far different.In the slag tapping boiler, require to cooperate the cindery melt temperature can not be too high, require good fluidity after the fusion, otherwise deslagging smoothly.And the formation of main hydraulic cement clinker mineral requires temperature more than 1350 ℃; When requiring to occur in the material a small amount of liquid phase,, finish essential molecular transfer between the solid phase particles, form high-grade hydraulicity compound by the mass transfer ability of liquid phase.Be suitable for making the cooperation material of cement clinker, also incomplete fusion under 1400 ℃ high temperature more can not be flowed.The cooperation cinder of slag tap coal for good fluidity, can only be mixed with and the proximate composition of blast-furnace slag, can only burn till to be the not high hydraulic material of early strength, can not burn till to be cement clinker.The method that the present invention is used can fit in the composition that is suitable for generating cement clinker, and in the equipment used, can keep the thermal regulation of producing in the kiln with cement clinker basic identical, and therefore, this law can be produced qualified cement clinker.
Comparison with high calcium carbonate capturing sulfur briquette technology: late nineteen seventies is to early eighties, and USEPA is subsidized a kind of high calcium carbonate moulded coal of researchdevelopment.Contain the Wingdale about 50% in the prescription of this moulded coal, a part and the calcium carbonate chemical combination of the interior Sulfur composition of coal are stayed in the slag during burning, thereby significantly reduce the sulfurous gas in the combustion exhaust.The U.S. had tested this high calcium carbonate moulded coal on the boiler of practicality.Units such as Institute of Environmental Chemistry, Chinese Academy of Sciences in 1984 and mining institute cooperate, also the too high calcium carbonate moulded coal of test on the boiler of practical scale.High calcium carbonate moulded coal is used in the test-results explanation, and the sulfurous gas in the waste gas can reduce 40% or more.But, in plain cylindrical furnace as do not take special measure, the slag of high calcium carbonate moulded coal can not be burnt till and be cement clinker.In addition, by US experiences, the processing charges of 60 tons of high calcium carbonate moulded coals of scale manufacturing of hourly output is 15 dollars per ton, therefore, the method that proposes according to the present invention only, the slag of high calcium carbonate moulded coal is cooperated suitable raw material, and fire and become the higher cement clinker of value, just can be in more advantageously position economically.
More existing above-mentioned several technology, the present invention overcomes above-mentioned each technical deficiency part as can be known, is more rational coal resource method of comprehensive utilization.
The prescription of the used moulded coal of the present invention and the main points of preparation are:
First, according to the mature experience of making cement clinker, press the coal ash composition, the calcium carbonate, the siliceous and ferriferous raw material that in feed coal, add reasonable quantity, and add low amount of fluorinated calcium class or other fusing assistants on demand, make after the mixed coal burning, the chemical ingredients of calcination ash content can form hydraulicity mineral such as Calucium Silicate powder class, calcium aluminate class, iron calcium aluminate class.
The second, moulded coal cooperates the smashing fineness of raw material, and tailing over of general requirement 4900 hole sizers is lower than 10%, so that the various distributed components in the inside of moulded coal, is beneficial to the carrying out of chemical reaction.
The 3rd, in the cooperation raw material of moulded coal, add a small amount of white lime or other tackiness agents in case of necessity, be beneficial to the moulded coal of pressurization or additive method moulding firm not broken.In addition, as required, add the contact substance of a small amount of alkali metal containing, to increase solid sulphur effect.
About the equipment of practical scale of the present invention, two schemes below researchdevelopment just:
First scheme: this programme is to have horizontal direction or carrying near horizontal direction in the special roasting kiln or special boiler of burning bed, cooperate the moulded coal one side of raw material manufacturing to move with ventilative bed, finishing type burning of coal process and ash content transform into the process of cement clinker.Through the red-hot moulded coal grog of calcination that above-mentioned special roasting kiln or special boiler are handled, go out said apparatus after, drop into the cement clinker cooler of certain traditional pattern.Red-hot grog is cooled off by Cryogenic air in cooler, and air is heated simultaneously.Heated air imports roasting kiln or boiler, to improve in the stove temperature and to save heat energy.In the special roasting kiln or special boiler that this programme is used, require to adopt resistant to elevated temperatures fire grate,, and add the part oxygen-rich air in the warm air in sending into stove where necessary with the fully satisfied temperature requirement that forms cement clinker, to regulate temperature in the stove, guarantee clinker quality.
Alternative plan: the main points of this programme are between similar aforementioned first scheme used roasting kiln and chamotte cooler, set up a short rotary kiln.Moulded coal is earlier in roasting kiln or boiler internal combustion, enters rotary kiln then and burns till and be grog, and hot then grog enters chamotte cooler, sends total system after the cooling.Because the formation reaction of main hydraulicity mineral in the grog though require to realize, belongs to the what thermopositive reaction in the high temperature more than 1350 ℃, therefore, only need the aftercombustion small amount of fuel in the short rotary kiln, keep the desired high temperature of reaction and get final product.
According to the The Patent Law of the People's Republic of China, the present inventor and affiliated unit, totally six of the extents of competence that requirement is stipulated in accordance with the law, other sees " moulded coal heating and producing cement chamotte simultaneously invention claims ".
Claims (1)
- According to the The Patent Law of the People's Republic of China, the present invention requires following scope limits of power prescribed by law:1, heating equipment always, or the boiler of production steam when producing heat energy or steam, can not be produced Portland clinker (being portland cement clinker), or other cement clinkers.The feature of the inventive method is in the horizontal direction or near the horizontal direction transfer the fuel, in the roasting kiln or boiler of static ventilative bed, and the moulded coal that burning cooperates raw material to make, when obtaining heat energy or steam, the cement clinker of getting back.2, in aforementioned 1 method, the raw material and the contact substance that add limy matter in raw coal are fully pulverized and are mixed and made into moulded coal, make a part of sulphur composition in the raw coal, when burning, moulded coal is fixed in the slag, in the hope of the method for contained sulfurous gas reduction in the combustion exhaust of discharging.3, in aforementioned 1 method, adopt cement clinker cooler, when cooling off the hot grog of discharging by roasting kiln or boiler, heating enters the air of cooler, then warm air is sent into roasting kiln or boiler, as combustion air, with the method that improves temperature of combustion and save heat energy.When 4, adopting aforementioned 1 method, in the air of sending into roasting kiln or boiler, add part oxygen-rich air or oxygen,, and improve the method for clinker quality with control stove internal combustion temperature.When 5, adopting aforementioned 1 method, utilize special steel material, Special Casting Iron or matrix material are made grate part in addition, with the method for the performance that improves equipment.When 6, adopting the method for aforementioned item 3, between roasting kiln or boiler and cooler, set up short widely different rotary kiln, with control grog firing temperature and method for quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102767A CN1007890B (en) | 1985-04-01 | 1985-04-01 | Supplying heat and producing cement materials concurrently by burning coal briquettes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102767A CN1007890B (en) | 1985-04-01 | 1985-04-01 | Supplying heat and producing cement materials concurrently by burning coal briquettes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102767A true CN85102767A (en) | 1986-09-10 |
| CN1007890B CN1007890B (en) | 1990-05-09 |
Family
ID=4792743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85102767A Expired CN1007890B (en) | 1985-04-01 | 1985-04-01 | Supplying heat and producing cement materials concurrently by burning coal briquettes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1007890B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997007071A1 (en) * | 1995-08-14 | 1997-02-27 | Bureau Of Administrative Service, The Chinese Academy Of Sciences | Process for producing heat and cement clinkers in one boiler, its products, the equipment used and its uses |
| CN1039407C (en) * | 1995-06-27 | 1998-08-05 | 国家建筑材料工业局南京水泥工业设计研究院 | Dry internal-combustion cement-producing technology and equipment |
| CN1047580C (en) * | 1996-11-06 | 1999-12-22 | 张怀连 | Prodn. method of cement |
| CN1051535C (en) * | 1996-02-02 | 2000-04-19 | 王师祥 | Production of cement by waste gas and dregs from artificial gas |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1232465C (en) * | 2002-12-24 | 2005-12-21 | 清华大学 | binary mixed coagulated stones and wet cement and method for production, deposit, transportation use and application |
-
1985
- 1985-04-01 CN CN85102767A patent/CN1007890B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039407C (en) * | 1995-06-27 | 1998-08-05 | 国家建筑材料工业局南京水泥工业设计研究院 | Dry internal-combustion cement-producing technology and equipment |
| WO1997007071A1 (en) * | 1995-08-14 | 1997-02-27 | Bureau Of Administrative Service, The Chinese Academy Of Sciences | Process for producing heat and cement clinkers in one boiler, its products, the equipment used and its uses |
| US6468345B1 (en) | 1995-08-14 | 2002-10-22 | The Chinese Academy Of Sciences | Process for producing both steam power and cement clinker simultaneously in one apparatus its products, apparatus and use |
| CN1051535C (en) * | 1996-02-02 | 2000-04-19 | 王师祥 | Production of cement by waste gas and dregs from artificial gas |
| CN1047580C (en) * | 1996-11-06 | 1999-12-22 | 张怀连 | Prodn. method of cement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1007890B (en) | 1990-05-09 |
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