CN110372235B - Cement raw material batching system and batching method - Google Patents
Cement raw material batching system and batching method Download PDFInfo
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- CN110372235B CN110372235B CN201910736684.4A CN201910736684A CN110372235B CN 110372235 B CN110372235 B CN 110372235B CN 201910736684 A CN201910736684 A CN 201910736684A CN 110372235 B CN110372235 B CN 110372235B
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- raw material
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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
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
Abstract
A cement raw material proportioning system and method is used for proportioning raw material in the cement production process to produce raw material meeting quality requirements, wherein the detection period of a raw material grinding sample is determined according to the batch of the raw material, the proportioning of the raw material is timely adjusted according to the component change of the raw material, the influence on the cement quality caused by the fact that the adjustment cannot be timely carried out is avoided, and the quality of cement production is improved.
Description
Technical Field
The invention relates to the technical field of cement processing and manufacturing, in particular to a proportioning system and a proportioning method for cement ingredients.
Background
In cement production, raw materials are ground into raw material powder, then the raw material powder is calcined to form clinker, and then the clinker powder is ground into cement, so that each stage has an important influence on subsequent production. Raw material proportioning is one of the important links of cement production. Limestone, clay, iron powder and sandstone are generally used as raw materials for producing cement in cement plants, and the raw material proportioning task is to obtain the proportion of various raw materials according to the chemical components of the known raw materials and the requirements on clinker so as to produce raw material powder meeting certain quality and yield requirements. Many manufacturers currently control the operation of the device by manual adjustment based on the working experience of the field operator. The laboratory collects raw material samples and tests on site every a specific period, for example, 1 hour, the test results are reported to a raw material batching operator, and the batching operator adjusts the raw material proportion according to the test results and experience. The phenomena of low production efficiency, high energy consumption, unstable quality and high labor intensity of operators are common phenomena in the batching production of cement raw materials.
In order to improve the efficiency of the cement production process, obtain a satisfactory control effect and improve the working efficiency in the prior art, a control system is adopted to automatically control the proportion of the cement raw meal according to the detection result of the raw meal grinding sample. The proportion is adjusted according to the result of periodic sampling of the ground raw meal samples, however, chemical components in the raw meal do not change according to the detection period, especially, the chemical components of the raw materials in different production places and batches have large differences, the prior art cannot adjust in time when the raw materials change, the raw materials can be adjusted according to the detection result after one detection period, and the cement in the detection period can not meet the quality requirement.
Prior art documents: CN 104339453A.
Disclosure of Invention
The invention provides a cement raw material batching system and a batching method, which can adjust the batching ratio of raw materials in time according to the component change of the raw materials, and avoid the influence on the cement quality caused by the incapability of adjusting in time, thereby improving the quality of cement production.
A cement raw meal batching system comprising: the raw material weight batch information storage part is used for storing the weight of each batch of raw materials in the proportioning bins for different raw materials and the oxide content of the current batch of different raw materials; the raw material weight sensor is arranged on the raw material conveyor and used for determining the conveying weight of different raw materials at each moment; a raw material consumption rate determination unit that determines the amount of consumption per unit time of a raw material different from the current time, based on the detection result of the raw material weight sensor; a raw material remaining amount determination unit that determines a remaining amount of a current batch of different raw materials based on the weight of the current batch of different raw materials stored in the raw material weight-batch information storage unit and the consumption amount per unit time determined by the raw material consumption rate determination unit; a component measuring part which can detect the milled powder sample at the outlet of the pulverizer and determine the content of each oxide in the milled powder; a milled powder information storage unit for storing the measurement result and the measurement time of the component measurement unit; a collection time determination unit which determines the time for the component measurement unit to collect the milled powder for detection based on the allowance, the unit time consumption and the preset raw material buffer quality of each raw material of the current batch determined by the raw material allowance determination unit; and a control part for determining the batching proportion of different raw materials based on the current measurement result of the component measurement part and the stored information of the milled powder information storage part.
Furthermore, the raw material proportioning bin firstly uses the raw materials which are put in the bin when preparing the cement.
Further, the oxides are calcium oxide, silicon dioxide, aluminum oxide and ferric oxide.
Further, the collection time determination section determines the remaining amount W of the current batch of the single materialiWhen the powder is zero, the powder is collected and detected by a component measuring part after the time t is determined, and t = M/Si+ t1 where M is the preset raw material buffer mass, SiThe consumption per unit time of the raw material with the balance of zero, and t1 is the time elapsed for the raw material to be fed to the outlet of the pulverizer.
Furthermore, the different raw materials are limestone, silica, clay and iron powder respectively.
Further, the control part determines the content of each oxide in the next batch of raw materials with the allowance of the zero raw material based on the content of each oxide in the milled powder detected and determined by the component measuring part and the content of the oxide of the raw materials except the zero raw material in the current batch, and updates the content of the oxide of the current batch of different raw materials in the raw material weight batch information storage part; then, the batching proportion of different raw materials is determined according to the oxide content of the current batch of different raw materials and the expected oxide content of the produced cement.
As another aspect of the present invention, there is provided a method for batching cement raw meal using the above-mentioned system for batching cement raw meal, comprising the steps of: (1) measuring the oxide content of the initial raw materials of the proportioning bins for different raw materials, storing the oxide content in a raw material weight batch information storage part, and determining the initial proportioning ratio of the different raw materials according to the expected oxide content of the produced cement; (2) the raw materials in different batching bins are conveyed to a pulverizer for pulverizing through corresponding raw material conveyors according to batching ratios, and the conveying weights of different raw materials at all times are collected through raw material weight sensors; a raw material consumption rate determination section that determines the consumption per unit time of different raw materials at the present time based on the detection result of the raw material weight sensor; a raw material remaining amount determination unit that determines the remaining amount of the current batch of different raw materials based on the weight of the current batch of different raw materials stored in the raw material weight-batch information storage unit and the consumption amount per unit time determined by the raw material consumption rate determination unit; (3) when the allowance of the current batch of single raw material is zero, collecting raw meal milled powder at a milling outlet after the moment t is determined to carry out component measurement part detection, and determining the content of each oxide in the raw meal milled powder, wherein t = M/Si+ t1 where M is the preset raw material buffer mass, SiThe consumption per unit time of the raw material with the balance of zero, and t1 is the time of the raw material fed to the outlet of the pulverizer; (4) the control part determines each oxide in the next batch of raw materials with the residual quantity of zero raw materials based on the content of each oxide in the milled powder detected and determined by the component measuring part and the content of the oxide of the raw materials with the residual quantity of zero raw materials in the current batchUpdating the oxide content of the current batch of different raw materials in the raw material weight batch information storage part; (5) the control part determines the batching proportion of different raw materials according to the oxide content of the current batch of different raw materials and the expected oxide content of the produced cement; (6) and (5) repeating the steps (2) to (5) until the batch of cement is produced.
Detailed Description
In order to more clearly illustrate the technical solutions of the present invention, the present invention will be briefly described below by using embodiments, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other technical solutions can be obtained according to the embodiments without inventive labor, and also fall within the disclosure of the present invention.
The cement raw material batching system provided by the embodiment of the invention is used for proportioning raw materials in the cement generation process so as to produce raw materials meeting quality requirements, and comprises a raw material weight batch information storage part, a raw material weight sensor, a raw material consumption rate determination part, a raw material allowance determination part, a component measurement part, a ground powder information storage part, an acquisition time determination part and a control part.
The raw materials of cement raw meal, including limestone, silica, clay and iron powder, are transported from different sources to respective batching silos by means of transport means. The weight of each of the raw materials of different batches is stored in a raw material weight batch information storage unit. The raw materials in the raw material proportioning bin adopt the principle of first-in first-out during production and use, namely the proportioning bin uses the raw materials which are put into the bin first in preparing the cement.
Raw materials in the proportioning bins can be conveyed to the pulverizer through corresponding raw material conveyors to be subjected to raw material grinding during cement production, and the raw material weight sensor is arranged on the raw material conveyors and used for determining conveying weights of different raw materials at each moment. The raw material consumption rate determining section determines the consumption per unit time of the raw material different from the current time based on the detection result of the raw material weight sensor. A raw material remaining amount determination unit for determining the remaining amount of the raw material based on the weight T of the current batch of the different raw material stored in the raw material weight-batch information storage unitiAnd a sourceConsumption per unit time S determined by a material consumption rate determining partiDetermining the balance W of the current batch of different raw materialsiIs equal to Ti-SitiWherein t isiThe elapsed time of the current batch of different raw materials. A component measuring part which can detect the raw meal milled powder sampling at the outlet of the pulverizer and determine the content of each oxide in the milled powder; wherein the oxides are calcium oxide, silicon dioxide, aluminum oxide and iron oxide, and the component measuring section may measure the contents of the respective oxides in the ground meal using, for example, a fluorescence analyzer.
A collection time determination part for determining the residual amount W of each raw material current batch based on the raw material residual amount determination partiConsumption per unit time SiAnd the preset raw material buffer mass M is used for determining the time for the ingredient measuring part to collect the milled powder for detection. Specifically, the collection time determination section determines the current batch allowance W of a single raw materialiWhen the powder is zero, the powder is collected and detected by a component measuring part after the time t is determined, and t = M/Si+ t1 where M is the preset buffer mass of the stock to avoid incomplete run-out of the previous batch of stock, SiThe consumption per unit time of the raw material with the balance of zero, and t1 is the time elapsed for the raw material to be fed to the outlet of the pulverizer.
And a control part for determining the batching proportion of different raw materials based on the current measurement result of the component measurement part and the stored information of the milled powder information storage part. The control part detects the content of each oxide in the determined milling powder based on the component measuring part after the component measuring part samples and detects, the oxide content of the raw material except the zero raw material of the current batch of allowance, and the content of each oxide in the next batch of raw material of which the allowance is the zero raw material is determined according to a formula:
wherein c 1, c 2, c 3 and c 4 represent the content of calcium oxide in 4 raw materials; s 1, s 2, s 3 and s 4 represent the content of silica in the 4 raw materials; a 1, a 2, a 3 and a 4 represent 4 elementsThe content of aluminum oxide in the material; f 1, f 2, f 3 and f 4 respectively represent the content of ferric oxide in the 4 raw materials; x 1, x 2, x 3 and x 4 represent the mixture ratio of 4 raw materials: c represents the percentage of the content of chemical element calcium oxide in the raw material; a represents the percentage of the content of chemical element aluminium oxide in the raw material; f represents the percentage of the content of the chemical element ferric oxide in the raw material; s represents the percentage of the chemical element silica content in the raw meal. Wherein C, S, A, F is the current measurement result of the component measuring part, and x 1, x 2, x 3 and x 4 are the current raw material ratio except the current batch residual WiThe oxide content of the raw material except for zero in the raw material can be obtained by the oxide content of the current batch stored in the raw material weight batch information storage part; the unknown oxide content of the next batch of zero material can be calculated from the above formula. The control unit updates the oxide content value of the current batch of the different raw material in the raw material weight batch information storage unit after determining the oxide content of the next batch of the raw material. The controller determines the batching proportion of different raw materials according to the formula after the oxide content of the current batch of different oxides in the material weight batch information storage part is determined, and then according to the oxide content of the current batch of different raw materials and the expected oxide content of cement production, wherein C, S, A, F is the expected oxide content, the oxide content of each single previous batch of raw materials is obtained through the oxide content of the current batch stored in the material weight batch information storage part, x 1, x 2, x 3 and x 4 are unknown quantities, and the formula is calculated to determine the proportioning updated value of each raw material.
The cement raw material batching method of the embodiment of the invention, which uses the cement raw material batching system, comprises the following steps: (1) measuring the oxide content of the initial raw materials of the proportioning bins for different raw materials, storing the oxide content in a raw material weight batch information storage part, and determining the initial proportioning ratio of the different raw materials according to the expected oxide content of the produced cement; (2) the raw materials in different proportioning bins are conveyed to the pulverizer for pulverizing according to proportioning ratio through the corresponding raw material conveyorThe weight sensor collects the conveying weight of different raw materials at each moment; a raw material consumption rate determination section that determines the consumption per unit time of different raw materials at the present time based on the detection result of the raw material weight sensor; a raw material remaining amount determination unit that determines the remaining amount of the current batch of different raw materials based on the weight of the current batch of different raw materials stored in the raw material weight-batch information storage unit and the consumption amount per unit time determined by the raw material consumption rate determination unit; (3) when the allowance of the current batch of single raw material is zero, collecting raw meal milled powder at a milling outlet after the moment t is determined to carry out component measurement part detection, and determining the content of each oxide in the raw meal milled powder, wherein t = M/Si+ t1 where M is the preset raw material buffer mass, SiThe consumption per unit time of the raw material with the balance of zero, and t1 is the time of the raw material fed to the outlet of the pulverizer; (4) the control part determines the content of each oxide in the next batch of raw materials with the allowance of the zero raw material based on the content of each oxide in the milled powder detected and determined by the component measuring part and the content of the oxide of the raw materials except the zero raw material in the current batch, and updates the content of the oxide of the current batch of different raw materials in the raw material weight batch information storage part; (5) the control part determines the batching proportion of different raw materials according to the oxide content of the current batch of different raw materials and the expected oxide content of the produced cement; (6) and (5) repeating the steps (2) to (5) until the batch of cement is produced.
All documents referred to herein are incorporated by reference into this application as if each were individually incorporated by reference. It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. The particular features, structures, materials, or characteristics described in this disclosure may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A cement raw meal batching system comprising: the raw material weight batch information storage part is used for storing the weight of each batch of raw materials in the proportioning bins for different raw materials and the oxide content of the current batch of different raw materials; the raw material weight sensor is arranged on the raw material conveyor and used for determining the conveying weight of different raw materials at each moment; a raw material consumption rate determination unit that determines the amount of consumption per unit time of a raw material different from the current time, based on the detection result of the raw material weight sensor; a raw material remaining amount determination unit that determines a remaining amount of a current batch of different raw materials based on the weight of the current batch of different raw materials stored in the raw material weight-batch information storage unit and the consumption amount per unit time determined by the raw material consumption rate determination unit; a component measuring part which can detect the sampling of the raw meal milled powder at the outlet of the pulverizer and determine the content of each oxide in the raw meal milled powder; a milled powder information storage unit for storing the measurement result and the measurement time of the component measurement unit; a collection time determination unit which determines the time for the component measurement unit to collect the milled powder for detection based on the allowance, the unit time consumption and the preset raw material buffer quality of each raw material of the current batch determined by the raw material allowance determination unit; the collection time determination part determines the current batch allowance W of a single raw materialiWhen the powder is zero, the powder is collected and detected by a component measuring part after the time t is determined, and t = M/Si+ t1 where M is the preset raw material buffer mass, SiThe consumption per unit time of the raw material with the balance of zero, and t1 is the time of the raw material fed to the outlet of the pulverizer; a control unit that determines the respective oxide contents of the next-batch raw material whose remaining amount is zero based on the respective oxide contents of the milled powder detected and determined by the component measuring unit and the oxide contents of the raw materials other than the zero raw material in the current batch, and updates the oxide contents of the different raw materials in the current batch in the raw material weight-batch information storage unit; then, the batching proportion of different raw materials is determined according to the oxide content of the current batch of different raw materials and the expected oxide content of the produced cement.
2. The raw cement batching system as recited in claim 1, wherein: the raw material proportioning bin firstly uses the raw materials which are put into the bin in the preparation of cement.
3. The raw cement batching system as set forth in claim 2, wherein: the oxides are calcium oxide, silicon dioxide, aluminum oxide and ferric oxide.
4. A cement raw meal batching system as claimed in claim 3, characterized in that: the different raw materials are limestone, silica, clay and iron powder respectively.
5. The raw cement batching system as recited in claim 4, wherein: the component measuring section measures the content of each oxide in the ground raw meal using a fluorescence analyzer.
6. A method for batching cement raw meal using the system for batching cement raw meal as claimed in any one of the preceding claims, comprising the steps of: (1) measuring the oxide content of the initial raw materials of the proportioning bins for different raw materials, storing the oxide content in a raw material weight batch information storage part, and determining the initial proportioning ratio of the different raw materials according to the expected oxide content of the produced cement; (2) the raw materials in different batching bins are conveyed to a pulverizer for pulverizing through corresponding raw material conveyors according to batching ratios, and the conveying weights of different raw materials at all times are collected through raw material weight sensors; a raw material consumption rate determination section that determines the consumption per unit time of different raw materials at the present time based on the detection result of the raw material weight sensor; a raw material remaining amount determination unit that determines the remaining amount of the current batch of different raw materials based on the weight of the current batch of different raw materials stored in the raw material weight-batch information storage unit and the consumption amount per unit time determined by the raw material consumption rate determination unit; (3) when the allowance of the current batch of single raw material is zero, collecting raw meal milled powder at a milling outlet after the moment t is determined to carry out component measurement part detection, and determining the content of each oxide in the raw meal milled powder, wherein t = M/Si+ t1 where M is the preset raw material buffer mass, SiThe balance beingZero consumption of raw material per unit time, t1 being the time it takes for the raw material to be fed to the outlet of the pulverizer; (4) the control part determines the content of each oxide in the next batch of raw materials with the allowance of the zero raw material based on the content of each oxide in the milled powder detected and determined by the component measuring part and the content of the oxide of the raw materials except the zero raw material in the current batch, and updates the content of the oxide of the current batch of different raw materials in the raw material weight batch information storage part; (5) the control part determines the batching proportion of different raw materials according to the oxide content of the current batch of different raw materials and the expected oxide content of the produced cement; (6) and (5) repeating the steps (2) to (5) until the batch of cement is produced.
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| US4395290A (en) * | 1982-01-13 | 1983-07-26 | Gulf & Western Industries, Inc. | Method of manufacturing cement raw mix |
| US7386368B2 (en) * | 2005-06-17 | 2008-06-10 | Icrete, Llc | Methods and systems for manufacturing optimized concrete |
| CN202486576U (en) * | 2011-09-20 | 2012-10-10 | 北京凯盛建材工程有限公司 | Cement raw material blending control device |
| CN104339453A (en) * | 2014-10-08 | 2015-02-11 | 济南大学 | Typical-working-condition-based adaptive cement raw meal batching system and batching method thereof |
| CN104965532A (en) * | 2015-06-25 | 2015-10-07 | 济南大学 | Cement raw material ingredient control system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101458517B (en) * | 2007-12-14 | 2010-10-27 | 中国科学院沈阳自动化研究所 | Raw material rate value optimizing and controlling method for cement raw material batching system |
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| US4395290A (en) * | 1982-01-13 | 1983-07-26 | Gulf & Western Industries, Inc. | Method of manufacturing cement raw mix |
| US7386368B2 (en) * | 2005-06-17 | 2008-06-10 | Icrete, Llc | Methods and systems for manufacturing optimized concrete |
| CN202486576U (en) * | 2011-09-20 | 2012-10-10 | 北京凯盛建材工程有限公司 | Cement raw material blending control device |
| CN104339453A (en) * | 2014-10-08 | 2015-02-11 | 济南大学 | Typical-working-condition-based adaptive cement raw meal batching system and batching method thereof |
| CN104965532A (en) * | 2015-06-25 | 2015-10-07 | 济南大学 | Cement raw material ingredient control system and method |
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