CN1318529A - Cement producing process - Google Patents
Cement producing process Download PDFInfo
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- CN1318529A CN1318529A CN01115009A CN01115009A CN1318529A CN 1318529 A CN1318529 A CN 1318529A CN 01115009 A CN01115009 A CN 01115009A CN 01115009 A CN01115009 A CN 01115009A CN 1318529 A CN1318529 A CN 1318529A
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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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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The cement producing process includes the successive technological steps of material compounding, pulverization, pelletizing, calcination, secondary compounding material, seconary pulverization, etc. It features the use of high aluminum material to replace clay, increased consumption of mineralizer and fuel coal. The controlled parameters include of the process heat consumption over 5000 KJ per ton of clinker, saturation ratio higher than 0.97, Si rate greater than 2.3, Fe rate greater than 1.5, F and S content greater than 1.5 %, raw fineness less than 6 % and cement fineness small than 3 %. The process produces cement of high activity, high strength, with low production cost, and high cement quality and yield, makes it possible to produce high grade cement in vertical kiln.
Description
The present invention relates to a kind of Cement Production method, particularly a kind of shaft kiln production Cement Production method of utilizing that is applicable to.
It is that China's cement industry adopts more general a kind of method that the shaft kiln method is produced cement, the cement that utilizes this method to produce, be commonly called as little cement, its output accounts for the 80-90% of national cement total output, formed a production colony of China's uniqueness, really brought into play enormous function for China's economic construction, but traditional shaft kiln method is produced cement, ubiquity is following not enough: the one, and the grog saturation ratio of being produced is usually below 0.97.Because the too high meeting of grog saturation ratio causes grog burn-ability variation, product percent of pass descends, if keep a lower saturation ratio, though can reduce the free ca in the cement, improve the burn-ability of grog, reduced energy consumption, but because clinker quality reduces, the incorporation that can cause adding material in subsequent handling reduces, and makes the cement output capacity of unit weight grog reduce, and sees the purpose that does not reach high yield, energy-conservation, consumption reduction on the whole.The 2nd, the raw material granularity is big, makes that physical-chemical reaction is insufficient in calcination process, and speed of reaction is slow, or because raw material ball plasticity is poor, the percentage of damage height directly influences kiln ventilation, thereby has caused output, the quality instability of grog or be difficult to reach technical requirements.The 3rd, traditional cement with clay as one of raw material, need expend a large amount of clay resources and land resources, and the content of aluminium sesquioxide is lower in the clay, cause the amount of liquid phase in calcination process on the low side, reduced physical-chemical reaction speed, thereby under equal working condition, influenced the raising of output and quality.The 4th, the incorporation of traditional method for production of cement blended material is restricted, generally speaking, when incorporation 〉=12%, to cause strength of cement that bigger decline is arranged, this cement output ratio that has restricted the unit weight grog to a certain extent is difficult to improve, and makes high strength grade Cement Production cost rise significantly.The 5th, because the restriction of above-mentioned technological deficiency, traditional shaft kiln technology can't be produced the high strength cement of 52.5 grades.
Purpose of the present invention is intended to improve the weak point of above-mentioned prior art, and a kind of high-grade Cement Production method of production that can save a large amount of clay resources is provided;
Another goal of the invention of the present invention provides a kind of under the condition that guarantees strength of cement, can improve the input-output ratio of cement, increases output, the method for production of cement that cuts down the consumption of energy.
The objective of the invention is to adopt following technical proposals to realize: a kind of Cement Production method, it comprises technological processs such as batching, grinding, granulation, calcining, second batch, secondary grinding successively, its special character is:
In blending process, adopt high aluminum raw material instead of clay, adopt the mineralizer of high consumption, with the coal-fired consumption of the standard configuration of ton grog heat requirement 〉=5000KJ, during batching, the content of control each component, according to calculation formula:
Controlling each parameter is: saturation ratio 〉=0.97, silicon rate 〉=2.3, iron rate 〉=1.5, fluorine sulphur content 〉=1.5%;
In grinding process, adopt 80 μ m square hole sieves control screen over-size≤6%, improve the raw material fineness;
In granulation process, pellet diameter≤5mm;
In calcination process, control ventilation 〉=98%;
In the secondary grinding process, adopt 80 μ m square hole sieves control screen over-size≤3%, to improve the fineness of cement.
Described high aluminum raw material can be a kind of or any two kinds and the two or more mixtures in leaf shale, bauxitic clay, coal gangue, the flyash.
When adopting aforementioned production method to produce cement, the incorporation of blended material can significantly increase, compare with existing cement production process, under the condition that does not reduce the strength of cement grade, the incorporation of blended material can 〉=15%.
Method for production of cement of the present invention compared with prior art has following outstanding substantive distinguishing features and obvious improvement: the one, adopted high aluminum raw material, increased the content of the aluminium sesquioxide in the component, thereby can improve the amount of liquid phase in the calcination process, accelerate physical-chemical reaction, cut down the consumption of energy, and high aluminum raw material wide material sources, cheap, both save clay resource and land resources, reduced the manufacture of cement cost again; The 2nd, the consumption of raising mineralizer, the content of fluorine and sulphur to stablize clinker quality, cuts down the consumption of energy in the increase grog; The 3rd, improved saturation ratio, make under the situation of saturation ratio 〉=0.97, do not influence the burn-ability of grog, clinker strength can improve 15%; The 4th, improve the raw material fineness, reduce the diameter of raw material ball, the percentage of damage of raw material ball is reduced, improve kiln ventilation, thereby make reaction rate accelerates, improve the output and the quality of grog; The 5th, improved cement fineness, increase the activity of cement, the cement intensity grade is improved, and under same intensity grade situation, can improves cement output and reach more than 15%, relevant data can be with reference to the experimental data synopsis that provides below:
Table one: processing parameter synopsis
| Project | KH | n | ?P | ?F+SO 3?(％) | Raw material fineness (%) | Raw material sphere diameter (mm) | Cement fineness (%) |
| Conventional process parameters | 0.93 | ?1.9 | ?1.1 | ?1.0 | ????10.0 | ????10.0 | ????5.0 |
| Processing parameter of the present invention | 0.99 | ?2.3 | ?1.5 | ?2.0 | ????6.0 | ????4.5 | ????2.5 |
Table two: experimental result synopsis
As can be seen, adopt explained hereafter cement of the present invention from top table, the clinker strength of cement and output are than all improving a lot.
| Project | Clinker strength (MPa) | Ton cement clinker output ratio | |||
| ????275 | ????32.5 | ????42.5 | ????52.5 | ||
| Traditional technology result | ????58.0 | ????1.40 | ????1.20 | ????1.05 | ????0 |
| Process results of the present invention | ????65.0 | ????2.00 | ????1.50 | ????1.30 | ????1.11 |
Below in conjunction with embodiment production method of the present invention is described in detail.
Embodiment 1
The high-grade Cement Production method of a kind of production, get 74.5 tons in calcareous raw material Wingdale, 8.0 tons of high aluminum raw material leaf shales, 3.0 tons of correction material iron powders, 1.5 tons in mineralizer fluorite, 0.5 ton in iron sulphide, coal-fired 13.5 tons, the component content of chemically examining each component is 0.99 according to formula calculating saturation ratio, and the silicon rate is 2.30, and the iron rate is 1.50, fluorine sulphur content ratio is 2.25%, and ton grog heat requirement is 5300KJ; Then above-mentioned raw materials is mixed after ball mill is worn into fine powder, sieve with 80 μ m square hole sieves, screen over-size is controlled to be 5%, fine powder after the screening is sent in the pan-pelletizer specification by particle diameter≤5mm make ball, be the green-ball material, the green-ball material is sent in the shaft kiln by the top is calcined, ventilation is controlled at 99% charge capacity in the calcination process, after calcining is finished is ripe material, and it is stand-by to go into the grog storehouse; Take by weighing 0.9 ton in grog, 0.04 ton of retardant, 0.06 ton of blended material after its mixing, is worn into fine powder through ball mill, sieves with 80 μ m square hole sieves, and screen over-size is controlled to be 1%, is finished product 52.5 cement after the screening, and dispatching from the factory by 50kg/ bag packing gets final product.Wherein, the incorporation of blended material is 6%.
Every index detected result of present embodiment cement:
| Parameter | 3 days ultimate compression strength (MPa) | 3 days folding strengths (MPa) | 28 days ultimate compression strength (MPa) | 28 days folding strengths (MPa) |
| National standard | ????≥22.0 | ????≥4.0 | ????≥52.5 | ????≥7.0 |
| This routine finished cement | ????30.2 | ????5.6 | ????58.0 | ????7.9 |
In the present embodiment, every index of cement all reaches GB 52.5 grade standards, and ton cement clinker output ratio is 1: 1.11, compared with prior art, both overcome the defective that traditional shaft kiln technology can't be produced high strength cement, reduced production cost again, improved cement output.
Embodiment 2
Get 72.5 tons in calcareous raw material Wingdale, 7.6 tons of high aluminum raw material leaf shales, 1.4 tons of bauxitic clays, 2.5 tons of correction material iron powders, 1.5 tons in mineralizer fluorite, 1.0 tons in gypsum, coal-fired 13.5 tons, it is 0.99 that the component content of chemically examining each component calculates saturation ratio according to formula, and the silicon rate is 2.30, and the iron rate is 1.55, the fluorine sulphur content is 2.30%, and ton grog heat requirement is 5300KJ; Then above-mentioned raw materials is mixed after ball mill is worn into fine powder, sieve with 80 μ m square hole sieves, screen over-size is controlled to be 6%, fine powder after the screening is sent in the pan-pelletizer specification by particle diameter≤5mm make ball, be the green-ball material, the green-ball material is sent in the shaft kiln by the top is calcined, ventilation is controlled at 100% charge capacity in the calcination process, after calcining is finished is ripe material, and it is stand-by to go into the grog storehouse; Take by weighing 33.5 tons in grog, 2.5 tons of retardant, 9.0 tons of blended materials after its mixing, are worn into fine powder through ball mill, sieve with 80 μ m square hole sieves, and screen over-size is controlled to be 2%, is finished cement after the screening, and grade is 42.5, and dispatching from the factory by 50kg/ bag packing gets final product.In the present embodiment, the incorporation of blended material is 18%, and ton cement clinker output ratio is 1: 1.30, and compared with prior art output capacity improves 19%.
Embodiment 3
Get 73.0 tons in calcareous raw material Wingdale, 7.0 tons of leaf shales.1.0 tons of coal gangues, 1.0 tons in flyash, 2.5 tons of iron powders, 1.5 tons in fluorite, 0.5 ton in iron sulphide, 0.5 ton in gypsum, coal-fired 13.0 tons, it is 1.00 that the component content of chemically examining each component calculates saturation ratio according to formula, the silicon rate is 2.30, the iron rate is 1.51, and the fluorine sulphur content is 2.36%, and ton grog heat requirement is 5350KJ; Then above-mentioned raw materials is mixed after ball mill is worn into fine powder, sieve with 80 μ m square hole sieves, screen over-size is controlled to be 5%, fine powder after the screening is sent in the pan-pelletizer specification by particle diameter≤5mm make ball, be the green-ball material, the green-ball material is sent in the shaft kiln by the top is calcined, ventilation is controlled at 100% charge capacity in the calcination process, after calcining is finished is ripe material, and it is stand-by to go into the grog storehouse; Take by weighing 50 tons in grog, 2.0 tons of retardant, 25.0 tons of blended materials after its mixing, are worn into fine powder through ball mill, sieve with 80 μ m square hole sieves, and screen over-size is controlled to be 3%, is finished cement after the screening, and grade is 32.5, and dispatching from the factory by 50kg/ bag packing gets final product.In the present embodiment, the incorporation of blended material is 32.5%, and ton cement clinker output ratio is 1: 1.54, and compared with prior art output capacity improves 22.1%.
Embodiment 4
Get 72.5 tons in calcareous raw material Wingdale, 7.0 tons of leaf shales, 1.0 tons of bauxitic clays, 1.0 tons of coal gangues, 1.0 tons in flyash, 2.5 tons of iron powders, 1.5 tons in fluorite, 0.5 ton in iron sulphide, coal-fired 13.0 tons, it is 1.00 that the component content of chemically examining each component calculates saturation ratio according to formula, and the silicon rate is 2.31, and the iron rate is 1.55, the fluorine sulphur content is 2.20%, and ton grog heat requirement is 5300KJ; Then above-mentioned raw materials is mixed after ball mill is worn into fine powder, sieve with 80 μ m square hole sieves, screen over-size is controlled to be 6%, fine powder after the screening is sent in the pan-pelletizer specification by particle diameter≤5mm make ball, be the green-ball material, the green-ball material is sent in the shaft kiln by the top is calcined, ventilation is controlled at 100% charge capacity in the calcination process, after calcining is finished is ripe material, and it is stand-by to go into the grog storehouse; Take by weighing 50 tons in grog, 2.0 tons of retardant, 52 tons of blended materials after its mixing, are worn into fine powder through ball mill, sieve with 80 μ m square hole sieves, and screen over-size is controlled to be 3%, is finished cement after the screening, and label is 275, and dispatching from the factory by 50kg/ bag packing gets final product.In the present embodiment, the incorporation of blended material is 50%, and ton cement clinker output ratio is 1: 2.08, and compared with prior art output capacity improves 32.7%.
Claims (3)
1, a kind of Cement Production method, it comprises technological processs such as batching, grinding, granulation, calcining, second batch, secondary grinding successively, it is characterized in that:
In blending process, with high aluminum raw material instead of clay, adopt the mineralizer of high consumption, with the coal-fired consumption of the standard configuration of ton grog heat requirement 〉=5000KJ, each parameter is controlled to be: saturation ratio 〉=0.97, silicon rate 〉=2.3, iron rate 〉=1.5, fluorine sulphur content 〉=1.5%;
In grinding process, the raw material fineness is controlled at the standard with 80 μ m square hole sieve screen over-size≤6%;
In granulation process, pellet diameter≤5mm;
In calcination process, control ventilation 〉=98%;
In the secondary grinding process, cement fineness is controlled at the standard with 80 μ m square hole sieve screen over-size≤3%.
2,, it is characterized in that described high aluminum raw material is a kind of or any two kinds and the two or more mixture in leaf shale, bauxitic clay, coal gangue, the flyash according to the described a kind of Cement Production method of claim 1.
3, according to the described a kind of Cement Production method of claim 1, it is characterized in that in described second batch process the incorporation of blended material 〉=15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01115009A CN1318529A (en) | 2001-06-06 | 2001-06-06 | Cement producing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01115009A CN1318529A (en) | 2001-06-06 | 2001-06-06 | Cement producing process |
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| Publication Number | Publication Date |
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| CN1318529A true CN1318529A (en) | 2001-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01115009A Pending CN1318529A (en) | 2001-06-06 | 2001-06-06 | Cement producing process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531429A (en) * | 2012-01-16 | 2012-07-04 | 郑慧 | Method for synergetically treating fluorine-containing sludge in cement kiln |
| WO2019210534A1 (en) * | 2018-05-02 | 2019-11-07 | 东北大学 | Method for preparing sulphoaluminate cement by using cyanide tailings |
| CN114538810A (en) * | 2020-11-11 | 2022-05-27 | 台泥资讯股份有限公司 | Carbon reduction method for cement plant |
| US11853023B2 (en) | 2020-11-11 | 2023-12-26 | Tcc Information Systems Corp. | Method of controlling coal management system for reducing coal usage |
-
2001
- 2001-06-06 CN CN01115009A patent/CN1318529A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531429A (en) * | 2012-01-16 | 2012-07-04 | 郑慧 | Method for synergetically treating fluorine-containing sludge in cement kiln |
| WO2019210534A1 (en) * | 2018-05-02 | 2019-11-07 | 东北大学 | Method for preparing sulphoaluminate cement by using cyanide tailings |
| CN114538810A (en) * | 2020-11-11 | 2022-05-27 | 台泥资讯股份有限公司 | Carbon reduction method for cement plant |
| US11853023B2 (en) | 2020-11-11 | 2023-12-26 | Tcc Information Systems Corp. | Method of controlling coal management system for reducing coal usage |
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