CN1049200C - Method for controlling the raw ingredients of cement - Google Patents
Method for controlling the raw ingredients of cement Download PDFInfo
- Publication number
- CN1049200C CN1049200C CN94102174A CN94102174A CN1049200C CN 1049200 C CN1049200 C CN 1049200C CN 94102174 A CN94102174 A CN 94102174A CN 94102174 A CN94102174 A CN 94102174A CN 1049200 C CN1049200 C CN 1049200C
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- Prior art keywords
- value
- cement
- rate
- raw material
- target value
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000004568 cement Substances 0.000 title claims abstract description 13
- 239000004615 ingredient Substances 0.000 title claims description 17
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 230000001186 cumulative effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 12
- 239000000203 mixture Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The present invention relates to a method for controlling ground raw material components for cement. In order to make the chemical constitutions or each rate value of the components of ground raw materials consistent with specified target values, an average value is calculated after summing up the chemical constitutions or the rate values of the ground raw materials, obtained in every hour, the original target value is replaced by a value obtained by subtracting 30% of difference between the original target value and the average value from the original target value, the new value is feed back to a control system for the components of ground raw materials, and various final target values are collected by repeating the process for nine times. The present invention provides guarantee for producing cement with high quality.
Description
The present invention relates to a kind of control method of cement grinding mill raw ingredients.
The present invention and the means with quick analysis main component and control is with robot calculator, fully factory's raw ingredients control method of storage capacity is relevant, especially with to have off-line elemental analyser and Composition Control relevant with the raw ingredients control method in the storage capacity cement mill of 10～20 times in robot calculator, raw mill unit-hour output.
The main component of cement slurry is SiO
2, Al
2O
3, Fe
2O
3And CaO, for the good cement of the quality of production, needing the weight ratio of these four kinds of compositions of control is certain value.The ratio that manufacture of cement is used has three kinds, is called KH, n, P, uses following (1), (2), (3) formula to represent respectively.
KH＝(CaO-1.65Al
2O
3-0.35Fe
2O
3)/(2.8SiO
2) (1)
n＝SiO
2/(Al
2O
3+Fe
2O
3) (2)
P＝Al
2O
3/Fe
2O
3 (3)
As existing technology, the control method of raw ingredients is in cement production process: go out to grind raw material through sampling, after the analysis, according to this analytical value, step is according to the rules mainly obtained the discharging ratio of various raw materials, so that various rate value (above-mentioned KH, n, P) meets the target value regulation with hand computation.
The control method of using existing raw ingredients is to be target with the chemical constitution of each hour or various rate value within range of management, but owing to there is analytical error, the metering outfit error, cause control error various time lags etc., the chemical constitution of each hour or various rate value do not restrain, change constantly often can not be within range of management.Be provided with in the manufacture of cement flow process of abundant storage capacity in the raw mill back, meet the target value regulation when needing the control charging to reach institute's determined number, with by method when controlling out the composition of mill raw material, chemical constitution hourly or various rate value do not restrain, often not within a governance context; Meeting the control method that target value is defined as target when the storehouse raw material reach institute's determined number to advance, is basis with once analytical value only, not with reference to the analytical value that obtains before this, belongs to the control method of microcosmic; The problem of using this method to bring is to be difficult to control out the chemical constitution of mill raw material or the regulation that various rate value meets target value.
Purpose of the present invention promptly provides the method that solves above-mentioned long-standing problem, and a kind of target value method of controlling raw ingredients promptly is provided.In order to achieve the above object, the method for control raw ingredients of the present invention is made of following method; Promptly utilize the enough big condition of storage capacity, for chemical constitution or the various rate value that makes the outbound raw material meets the target value regulation, after the chemical constitution that goes out to grind raw material that accumulative total per hour obtains or the data of various rate values, after repeating for several times, calculate its mean value, use the chemical constitution of this mean value and outbound raw material or the target value of various rate values again, go out out the optimum variation amount of set(ting)value of each hour of the chemical constitution of mill raw material or various rate values by Composition Control with the electronics computer calculates.Again this value is fed back to out mill raw ingredients Controlling System, control out the chemical constitution of mill raw material and the value of various rate values.More particularly, the SiO that per hour obtains for basis
2, Al
2O
3, Fe
2O
3, CaO analytical value, calculate KH, n, each rate value of P, repeat cumulative number more than or equal to after four times, calculate the mean value of each rate value, to provide mill raw ingredients Controlling System by the value feedback of the target value-0.3 (mean value-target value of each rate value) of each rate value of raw material in the storehouse, and substitute former target value, repeat above-mentioned whole process, multiplicity greater than or after d equals nine times, obtain various ultimate aim rate values.
Accompanying drawing 1 is controlled the step skeleton diagram of raw ingredients method for the present invention, and accompanying drawing 2 is compare with the present invention curve synoptic diagram of various rate values variations of outbound raw material of existing method, and wherein dotted line is the existing methods change curve, and solid line is a change curve of the present invention.
As shown in Figure 1, the control composition is used tricks the calculation machine according to the SiO that per hour obtains
2, Al
2O
3, Fe
2O
3, CaO analytical value, obtain KH, n, each rate value of P according to aforementioned (1), (2), (3) formula, repeat accumulative total four times (or more than four times) after, the mean value of calculating each rate value, then with this mean value as A
KH, A
n, A
P, with the target value of the various rate values of raw material in the storehouse as B
KH, B
n, B
P, with B
KH-0.3 (A
KH-BA
KH), B
n-0.3 (A
n-B
n), B
p-0.3 (A
P-B
p) value feedback provide mill raw ingredients Controlling System, and substitute former target value B respectively
Kh, B
n, B
pSaid process nine times repeatedly (or more than nine times) converges various ultimate aim rate values.
KH, the n of the outbound raw material when accompanying drawing 2 expressions use existing method and the present invention to control out the mill raw ingredients, every batch of difference of P, these data are analytical resultss of every batch of outbound raw material.When using by method, because the control error of generations such as analytical error, metering outfit error, various time lags, thereby chemical constitution hourly or various rate value are not restrained, change constantly, so that various rate values produce fluctuation, the value of departing from objectives greatly; Relative in this, use the present invention, finally meet target value with the various rate values of outbound raw material and be defined as purpose, utilize the mean value of aggregate-value of the various rate values of storehouse raw material, and then 3/10ths the part feedback that will be equivalent to the difference of the mean value of aggregate-value and target value provides mill raw material Controlling System, so various rate value is converged in target value.
Use the present invention, can alleviate the burden of controlling out the mill raw ingredients, can obtain the little raw material of various rate value fluctuations between each storehouse simultaneously, can produce superior in quality cement at last.This invention and then establish the storehouse, need control the occasion of raw material principal constituent with high precision applicable to the reactive system front.
Claims (1)
1. the control method of a raw ingredients of cement is characterized in that according to the SiO that per hour obtains
2, Al
2O
3, Fe
2O
3, CaO analytical value, calculate KH, n, each rate value of P, repeat cumulative number more than or equal to after four times, calculate the mean value of each rate value, to provide mill raw ingredients Controlling System by the value feedback of the target value-0.3 (mean value-target value of each rate value) of each rate value of raw material in the storehouse, and substitute former target value, repeat above-mentioned whole process, multiplicity obtains various ultimate aim rate values more than or equal to after nine times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94102174A CN1049200C (en) | 1994-03-08 | 1994-03-08 | Method for controlling the raw ingredients of cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94102174A CN1049200C (en) | 1994-03-08 | 1994-03-08 | Method for controlling the raw ingredients of cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1108224A CN1108224A (en) | 1995-09-13 |
| CN1049200C true CN1049200C (en) | 2000-02-09 |
Family
ID=5030535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94102174A Expired - Fee Related CN1049200C (en) | 1994-03-08 | 1994-03-08 | Method for controlling the raw ingredients of cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049200C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348851B (en) * | 2020-03-10 | 2022-04-19 | 华东理工大学 | Cement raw material adjusting method and system based on linear programming |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108905A (en) * | 1986-12-31 | 1988-07-20 | 清华大学 | Raw meal composition charge ratio autocontrol system for vertical furnance |
| CN2063870U (en) * | 1988-01-11 | 1990-10-17 | 国家建筑材料工业局建筑材料科学研究院 | Raw materials proportion auto-controlling system |
-
1994
- 1994-03-08 CN CN94102174A patent/CN1049200C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108905A (en) * | 1986-12-31 | 1988-07-20 | 清华大学 | Raw meal composition charge ratio autocontrol system for vertical furnance |
| CN2063870U (en) * | 1988-01-11 | 1990-10-17 | 国家建筑材料工业局建筑材料科学研究院 | Raw materials proportion auto-controlling system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1108224A (en) | 1995-09-13 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |