CN1089582A - Burning clinker of cement new technology-two proportioning processes - Google Patents
Burning clinker of cement new technology-two proportioning processes Download PDFInfo
- Publication number
- CN1089582A CN1089582A CN 93100819 CN93100819A CN1089582A CN 1089582 A CN1089582 A CN 1089582A CN 93100819 CN93100819 CN 93100819 CN 93100819 A CN93100819 A CN 93100819A CN 1089582 A CN1089582 A CN 1089582A
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- fuel
- cement
- kiln
- raw material
- proportioning
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
- C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of new technology that is widely used in cement clinkers productions such as wet process rotary kiln, upright Bohr's kiln, various dry method hollow kiln, preheater kiln and precalciner kiln.Its processing method is to allocate the solid fuel that coal etc. contains ash content into certain admixture according to the composition and the content of ash content, makes the character of fuel be more suitable for the calcining of cement, and efficiency of combustion is higher; Simultaneously the proportioning of raw material is adjusted, made the material (fuel and raw material) that enters into production process that an optimum regime all be arranged.If adopt common coal to make fuel, but present technique energy efficient 5-10%, volume increase 5-10%, free calcium oxide reduces, and clinker quality improves.
Description
A kind ofly be adapted to the new technology that rotary kiln is produced cement clinker, the cement manufacture plant that can be widely used in combustion processes such as wet process rotary kiln, upright Bohr's kiln, various dry method hollow kiln, preheater kiln and precalciner kiln and be separated by calcination of chamotte.
The clinker burning equipment that many manufacture of cement factory adopts is various rotary kiln, their common feature is that fuel combustion is carried out at kiln hood, being heated the incinerating material is fed by the kiln tail, material movement is promptly finished sintering, reaction process to kiln hood, the ash that produced of burning then sink in come by the kiln tail and heated material on, this process is because ratio of combustion is more complete, and temperature is higher and be easier to control, so clinker quality improves easily than coal and the raw material incinerating shaft kiln that is mixed; But because combustion processes and the violent non-reversibility of heat transfer process and a large amount of thermosteresis of heat transfer process etc. make calcined by rotary kiln thermo-efficiency can not reach shaft kiln like that high (deduction heat loss due to unburned gas) all the time; On the other hand, for burning the rotary kiln that coal etc. contains the fuel of ash, because the burning ash sinks on supplied materials at kiln hood, this just causes the local ununiformity of grog composition inevitably.Usually, be of the influence of compensation coal ash to the grog composition, that often the lime saturation factor of raw material is joined is higher than grog (composition of coal ash is often near clayey raw material) this has just aggravated the inhomogeneous state of grog particle inside and outside, the part lime content that makes is too high and be difficult to absorb, the part that has then clay product is concentrated (as the coal ash particle place that sinks), brings influence to burning till.For guaranteeing that clinker quality just must prolong calcination time, reduce lime saturation factor or improve firing temperature.This quality to grog, grindability, production energy consumption, output etc. all have remarkable influence.Even so, adopting coal at present is the cement clinker of the various rotary kilns productions of fuel, and the free calcium oxide of particle surface is low often, central part is then very high, its difference can reach 2.5-3.0 doubly, the saturation factor height of this and raw material, and coal ash sinks close contact on the supplied materials surface.
The fuel that the calcined by rotary kiln grog is adopted has gas, liquid and solid, and the character of these fuel is different, and the composition difference is also different to the incendiary influence.Along with the growing tension of the energy, most of cement mill has all adopted coal or some combustible solid wastes to make fuel.Solid fuel generally all contains ash inevitably, and the incorporation that must consider ash content in the production is determined the proportioning of raw material, and this consideration usually is passive their variation of adaptation.Studies show that: the composition of the ash in the solid fuel also has certain influence to burning, and suitable chemical ingredients will have the raising effect to the calorific value of fuel, and the fusing point of ash also changes simultaneously.
Heat release potentiality when the objective of the invention is to bring into play fuel combustion more fully, and the non-reversible process when utilizing burning, heat transfer, intensification and grey settled characteristics are improved the throughput of rotary kiln, lower, the better quality of energy consumption.
Processing method of the present invention is to allocate the solid fuel that coal etc. contains ash into certain admixture according to the composition and the content of ash, makes the character of fuel be more suitable for the calcining of cement, and efficiency of combustion is higher; Simultaneously the proportioning of raw material is adjusted, the character that reaches with fuel is complementary.Core of the present invention is at first to have proposed to change fuel performance to adapt to the carrying out of production, and changes the composition of raw material simultaneously, makes the material (fuel and raw material) that enters into production process that an optimum regime all be arranged.Process of the present invention can be represented with following flow process:
Fuel+admixture
↓
Combined grinding-→ calcined by rotary kiln ←-raw material (or slip) ← grinding ← cement producting material
↓
Grog
Direct result of the present invention is that the combustioncharacteristics of fuel is improved, and burnability of raw material improves, and the sintering of grog is easier.Reached the purpose that increases output, improves the quality, cuts down the consumption of energy.
Key of the invention process is correctly to determine the admixture of fuel, and according to research of the present invention, general admixture is based on the main raw material of cement type that this factory is produced, and the character of based on fuel is adjusted.To with calcareous materials such as Wingdales being the cement type (as silicate cement, aluminosulfate cement, high-alumina cement etc.) of main raw material, admixture is based on the calcium based raw material, and the calcium based raw material can be Wingdale, gypsum, fluorite or cement clinker and their mixture.The proportioning of admixture, volume according to the difference of the difference of ature of coal, cement type, kiln type etc. equipment difference and change.The volume of admixture in fuel can be 3-45%, and to the admixture based on Wingdale, general ratio range is:
Wingdale: gypsum: fluorite: grog=100: 0～25: 0～10: 0～15
The composition of above-mentioned admixture can be by the practical condition increase and decrease of kiln.
As the above-mentioned invention of chatting, be called two proportioning processes here, they are to join fuel and join raw material, two combinations of joining just can reach purpose of the present invention.The cooperation of fuel is a starting point according to the characteristic of fuel, and the cooperation of raw material is a purpose according to improving burn-ability; Two combinations of joining reduce quality raising, the energy consumption of grog.
The restriction condition of present technique is the character of fuel, as state, ash content, composition, thermal value, combustionvelocity etc.If the poor performance of fuel, the then effect of the two batchings of influence.Generally speaking, if adopt common coal to make fuel, but present technique energy efficient 5-10%, volume increase 5-10%, free calcium oxide reduces, and clinker quality improves.To producing 1000000 tons cement mill per year, can increase production ten thousand tons of 5-10 every year, fuel economy 7460-14900 ton standard coal.
Implementation condition of the present invention is very simple, newly repaiies the cement mill and can set up the feeding Coal Blending System to fuel preparation system, to satisfy the requirement of two batchings.To old factory, as long as the feed system of coal mill is transformed.If it is not enough that raw coal grinds power, also can set up grinding machine etc., use the coal requirement with what satisfy rotary kiln.In implementation process, fuel can be treated as second raw material, not only want strict its fineness of control, moisture, also to require its composition and homogeneity.
Embodiments of the invention carry out on a Φ 2.5/2.7 * 45M shaft preheater rotary kiln, the fuel that adopts is common bituminous coal, thermal value is the 17900-23400kJ/kg coal, and the grog of production is an ordinary portland cement clinker, grog saturation factor 0.90-0.98, admixture is the mixture of Wingdale and grog, proportioning 100: 4.5, the amount of mixing in the coal is 8-15%, has reached raising output 18%, energy-conservation about 10%, the average label of grog is greater than the good results of 525#.
Another embodiment of the present invention realizes on two Φ 3.1/2.5 * 78M wet process rotary kilns, adopts the bituminous coal of thermal value 20900-26400kj/kg coal, and admixture is Wingdale, grog, gypsum and fluorite, and its proportioning is:
Wingdale: grog: gypsum: fluorite=100: 5: 2.5: 0.6
The amount that is incorporated in the coal is 6-22%, produces ordinary Portland cement and oil well cement, has reached volume increase 11%, energy-conservation 12% effect, and the grog free calcium oxide of production on average is lower than 0.8%, and label is greater than 550#.
Claims (2)
1, a kind of new technology that is adapted to rotary kiln production cement clinker, can be widely used in wet process rotary kiln, upright Bohr's kiln, various dry method hollow kilns, combustion processes such as preheater kiln and precalciner kiln and the cement manufacture plant that is separated by calcination of chamotte, it is characterized in that it being that solid fuel with coal etc. contains ash is allocated certain admixture into according to the composition and the content of ash, make the character of fuel be more suitable for the calcining of cement, simultaneously the proportioning of raw material is adjusted, the character that reaches with fuel is complementary, make the material (fuel and raw material) that enters into production process that an optimum regime all be arranged, flow process is:
Fuel+admixture
↓
Combined grinding-→ calcined by rotary kiln ←-raw material (or slip) ← grinding ← cement producting material
↓
Grog
2, technology as claimed in claim 1, it is characterized in that producing with the calcium oxide when being the cement type of main raw material (as (as silicate cement, aluminosulfate cement, high-alumina cement etc.), the batching of admixture is based on the calcium based raw material, and proportioning is:
Wingdale: gypsum: fluorite: grog=100: 0～25: 0～10: 0～15
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100819 CN1089582A (en) | 1993-01-15 | 1993-01-15 | Burning clinker of cement new technology-two proportioning processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100819 CN1089582A (en) | 1993-01-15 | 1993-01-15 | Burning clinker of cement new technology-two proportioning processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1089582A true CN1089582A (en) | 1994-07-20 |
Family
ID=4983248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93100819 Pending CN1089582A (en) | 1993-01-15 | 1993-01-15 | Burning clinker of cement new technology-two proportioning processes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089582A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001030944A1 (en) * | 1999-10-22 | 2001-05-03 | Chunlei Zheng | Clean combustion of coal, utility of the concomitant product of the clean combustion and the product by using the concomitant product |
| CN111592248A (en) * | 2020-04-27 | 2020-08-28 | 安徽精公检测检验中心有限公司 | Matching method of fire coal for cement calcination |
| CN113045229A (en) * | 2021-03-09 | 2021-06-29 | 文县祁连山水泥有限公司 | Process for improving 28-day strength of clinker |
-
1993
- 1993-01-15 CN CN 93100819 patent/CN1089582A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001030944A1 (en) * | 1999-10-22 | 2001-05-03 | Chunlei Zheng | Clean combustion of coal, utility of the concomitant product of the clean combustion and the product by using the concomitant product |
| CN111592248A (en) * | 2020-04-27 | 2020-08-28 | 安徽精公检测检验中心有限公司 | Matching method of fire coal for cement calcination |
| CN111592248B (en) * | 2020-04-27 | 2022-03-25 | 安徽精公检测检验中心有限公司 | Matching method of fire coal for cement calcination |
| CN113045229A (en) * | 2021-03-09 | 2021-06-29 | 文县祁连山水泥有限公司 | Process for improving 28-day strength of clinker |
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| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Chuanjian Chemical Building Material New Tech. Development Department, Chengdu C Document name: Deemed as a notice of withdrawal |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |