CN113990404A - Sintered ore raw material consumption calculation method - Google Patents
Sintered ore raw material consumption calculation method Download PDFInfo
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- 239000002994 raw material Substances 0.000 title claims abstract description 73
- 238000004364 calculation method Methods 0.000 title abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 107
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000005245 sintering Methods 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 230000008859 change Effects 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 claims abstract description 8
- 239000003546 flue gas Substances 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 136
- 235000019738 Limestone Nutrition 0.000 claims description 69
- 239000006028 limestone Substances 0.000 claims description 69
- 239000000292 calcium oxide Substances 0.000 claims description 68
- 235000012255 calcium oxide Nutrition 0.000 claims description 68
- 239000010459 dolomite Substances 0.000 claims description 68
- 229910000514 dolomite Inorganic materials 0.000 claims description 68
- 239000000446 fuel Substances 0.000 claims description 63
- 238000002156 mixing Methods 0.000 claims description 55
- 238000004519 manufacturing process Methods 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 9
- 235000010755 mineral Nutrition 0.000 claims description 9
- 239000011707 mineral Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052742 iron Inorganic materials 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
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- 238000010304 firing Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
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Abstract
The invention provides a method for calculating the consumption of a sintering ore raw material, which is based on the theoretical basis of mass conservation, considers the calculation of the burning loss influenced by the mass change caused by Fe oxidation/reduction, deducts the influence caused by Fe oxidation from the mass change caused by material burning loss before and after sintering, considers the uncontrollable loss rate of a mixture and the amount of ore dust taken away with flue gas, and changes the traditional theoretical calculation method on the basis of the yield of 1/1 tons of iron ore from 1 ton of the iron raw material consumed by the sintering ore. The method for calculating the consumption of the raw materials of the sinter ore provided by the invention has the advantages of simple principle, quickness in calculation and obvious effect, can obviously avoid large fluctuation of the ingredients of the uniformly mixed ore, and meets the requirements of sintering and blast furnaces.
Description
Technical Field
The invention belongs to the technical field of sinter ore consumption calculation, and particularly relates to a sinter ore raw material consumption calculation method.
Background
Under the condition of intense competition in the steel industry, cost reduction is a powerful measure for keeping enterprise competitiveness. The consumption of various raw materials on a dry basis (the consumption of removing surface water content, referred to as ore consumption for short) required for producing ton of sinter is one of key economic assessment indexes, and the cost of the sinter is directly influenced. The accurate calculation of the sinter ore consumption has important significance for controlling the sintering cost and reducing the raw material stock.
In production, the ore consumption required by producing tons of sintered ore is usually calculated reversely by periodically mixing a stock yard disc library and the statistical data of the sintered ore consumption of the blast furnace. However, due to the factors such as inaccuracy of on-site weighing, errors introduced by a warehouse volume calculation method, loss caused by links such as production, dust removal and transportation, and the like, cannot be measured, the production management department cannot scientifically calculate the sinter ore consumption, and even large profit and loss in ore material inventory can occur in production.
In order to solve the problem, a method for carrying out theoretical calculation according to the burning loss of various raw materials produced by sintering is introduced, and the method has a certain reference value, but because the types of the raw materials added in the sintering process are more, and a plurality of metering errors are accumulated, a certain difference exists between the method and the actual firing rate, and the method is difficult to be used as a reference standard. In order to avoid the large dispute among the material consumption unit, the material supply unit and the measurement unit, a large amount of experimental research analysis must be performed to find the correlation between the material consumption unit and the material supply unit, so a new method for calculating the raw material consumption of the sinter ore is needed in the art, and the calculated raw material consumption value is close to the actual production statistical value and the experimental research verification value, so as to better meet the sintering requirement.
The ore consumption of the sinter is calculated according to the burning loss theory of various raw materials produced by sintering, and the calculation formula is as follows: 1 ton of iron ore yield is equal to the proportioning of various iron ores, (1-various iron ore moisture), (1-various iron ore loss) and various fluxing agents, (1-various fluxing agent moisture), (1-various fluxing agent loss) and fuel proportioning, (1-fuel moisture) (1-fuel loss); the iron raw material consumed by 1 ton of sinter is 1/1 tons of iron ore, the quantity of finished sinter is equivalent to the residual of the iron material, flux and fuel, but the difference between the theoretical calculation sintering rate and the actual sintering rate is large, so the theoretical calculation error of raw material consumption is also large, and a great deal of experimental study is needed to be carried out to approve the consumption of each raw material for sintering, and the labor and material resources are wasted.
Disclosure of Invention
In view of the above, the present invention provides a method of calculating raw material consumption of a sintered ore that overcomes or at least partially solves the above problems.
In order to solve the technical problem, the invention provides a method for calculating the raw material consumption of a sinter, which comprises the following steps:
setting the dry basis mass of the mixed ore in the production raw material of the sinter ore as 100;
calculating the dry basis mass of the materials of the sinter production raw materials;
calculating the burning loss of the sintering ore production raw material;
calculating the FeO amount of the sinter production raw material;
calculating the burning loss change of the burning loss minus FeO oxidation;
calculating the quality of finished sintered ore generated by the sintered ore production raw materials;
obtaining a simplified expression of the sintered mineral content of the finished product according to the dry basis mass of the material, the burning loss, the FeO content, the burning loss change and the simplified sintered mineral content of the finished product;
calculating the consumption of the dry materials of the uniform mixing ore required by the finished sintered ore according to the simplified expression of the quality of the finished sintered ore;
acquiring a dry material consumption correction expression of the uniform mixing ore required by the finished sintered ore according to the dry material consumption of the uniform mixing ore required by the finished sintered ore;
acquiring a burning loss detection value of the blending ore, a burning loss detection value of quicklime, a burning loss detection value of limestone, a burning loss detection value of dolomite, a burning loss detection value of fuel and a FeO control value for producing sintering ore;
and substituting the data into a dry material consumption correction expression of the uniformly mixed ore required by the finished sintered ore to calculate the consumption of each raw material.
Preferably, the expression of the dry mass of the material is as follows:
wherein M is5Indicating the mixingThe total mass of the ore, the limestone, the dolomite, the quicklime and the fuel accounts for the sum of the mass fractions of the mixture in the mixing machine, AiThe dry basis mass fraction of each material in the blended ore, limestone, dolomite, quicklime and fuel is shown, i represents subscripts of different raw materials, i is 1-5, and the blended ore, limestone, dolomite, quicklime and fuel are respectively and sequentially shown.
Preferably, the expression of the burnout is:
wherein S is5Expressing the burning loss quality sum of the blended ore, limestone, dolomite, quicklime and fuel, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliThe burning loss mass ratio of each material is shown, i represents subscripts of different raw materials, and i is 1-5, and respectively represents blending ore, limestone, dolomite, quicklime and fuel in sequence.
Preferably, the expression of the FeO amount is:
wherein M isfRepresenting the total FeO mass fraction, A, of 5 materials in the mixtureiExpressing the dry basis mass fraction of each material in the blending ore, limestone, dolomite, quicklime and fuel, FiAnd (3) representing the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blended ore, limestone, dolomite, quicklime and fuel in sequence.
Preferably, the expression of the burn-out variation is:
wherein C represents the change in burnout, S5Indicating the ore, limestone and dolomiteThe burning loss quality of the stone, the quicklime and the fuel, MfThe mass fraction of the total FeO in 5 materials in the mixture is shown.
Preferably, the expression of the quality of the finished sintered ore is as follows:
wherein K represents the quality of the finished sintered ore, M5Expressing the sum of the mass fractions of the blended ore, the limestone, the dolomite, the quicklime and the fuel in the mixed material of the mixing machine, X expressing the mass fraction of the blended internal circulation return ore in the mixed material, H expressing the water content mass fraction of the mixed material, S5Expressing the burning loss quality sum of the mixed ore, limestone, dolomite, quicklime and fuel, MfThe mass fraction of the total FeO of the 5 materials in the mixture is shown, and F represents the mass ratio of the FeO of the finished sintered ore.
Preferably, the simplified expression of the sintered mineral content of the finished product is as follows:
wherein K represents the quality of the finished sintered ore, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliExpressing the burning mass ratio of each material, FiAnd F represents the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blending ore, limestone, dolomite, quicklime and fuel in sequence.
Preferably, the expression of the consumption of the blending ore dry material required by the finished sintered ore is as follows:
wherein, YiDry-base mixed ore, limestone, dolomite and crude stone for producing 1 ton of sinterAsh consumption, F represents the FeO mass ratio of the finished sinter, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliExpressing the burning mass ratio of each material, FiAnd (3) representing the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blended ore, limestone, dolomite, quicklime and fuel in sequence.
Preferably, the expression of the blending ore dry material consumption correction expression required by the finished sintered ore is as follows:
wherein, Y1Expressing the dry basis consumption of the blending ore required by 1 ton of finished sinter, delta expressing the uncontrollable loss rate of the mixture, F expressing the mass ratio of FeO in the finished sinter, and SiExpressing the burning mass ratio of each material, FiRepresents the mass ratio of FeO in each material, AiThe mass fraction of dry basis of each material in the mixed ore, limestone, dolomite, quicklime and fuel is shown, i represents subscripts of different raw materials, i is 1-5, the subscripts respectively represent the mixed ore, limestone, dolomite, quicklime and fuel in sequence, and phi represents the amount of dust carried away by flue gas.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: the method for calculating the consumption of the raw materials of the sinter ore provided by the invention has the advantages of simple principle, quickness in calculation and obvious effect, can obviously avoid large fluctuation of the ingredients of the uniformly mixed ore, and meets the requirements of sintering and blast furnaces.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for calculating raw material consumption of a sinter according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Before the present invention is explained, it is to be understood that the raw material for producing the sinter ore is composed of the blending ore, limestone, dolomite, quicklime, fuel, sinter return and the set added moisture. After sintering and cooling, the screened return ores (internal return ores) circularly enter a burdening link, and the amount of the return ores entering and exiting the sintering machine is equal under the condition of stable raw material conditions and operation processes, so that the dynamic balance in production is achieved. Based on the principle of conservation of mass, the following calculation premises are determined:
production reaches return fine balance, and the added return fine quantity is the same as the quality of the produced return fine;
secondly, the return ores are high-temperature sintering products, burning loss and water content are not considered, and the content of FeO in the return ores is the same as that of the finished sintering ores;
③ the burning loss detection of each material is carried out by roasting at 900 ℃ in oxidizing atmosphere, and the Fe2+ is considered to be completely converted into Fe in the burning loss detection process3+The influence of Fe oxidation introduction should be deducted from the mass change caused by material burning loss before and after sintering.
Referring to fig. 1, in an embodiment of the present application, the present invention provides a method for calculating raw material consumption of sintered ore, the method including the steps of:
s1: setting the dry basis mass of the mixed ore in the production raw material of the sinter ore as 100;
in the embodiment of the present application, to derive the blending ore consumption formula, first, assuming that the dry basis weight of the blending ore in the raw material for producing sintered ore is 100, the dry basis weight of the material of the raw material for producing sintered ore, the burning loss of the raw material for producing sintered ore, and the FeO amount of the raw material for producing sintered ore can be calculated accordingly.
For convenience of description, the following constant parameters are defined, and the meanings of each constant parameter are explained as follows:
constant parameters: subscripts i ═ 1, 2, 3, 4, and 5, respectively represent blended ore (i ═ 1), limestone (i ═ 2), dolomite (i ═ 3), quick lime (i ═ 4), and fuel (i ═ 5), and the dry basis mass fraction (a) of each material is calculatediWhen the dry material ratio of limestone, dolomite, quicklime and coke powder is 1, the dry material ratio can be regarded as A of dry-base mixed oreiMultiple); h represents the water content mass fraction of the mixture; siExpressing the burning mass ratio of each material; fiRepresenting the mass ratio of FeO in each material; f represents the mass ratio of FeO in the finished sintered ore; delta represents the uncontrollable loss rate of the mixture; phi represents the amount of dust carried away by the flue gas.
Variable parameters: y isiThe consumption of dry-basis blending ore, limestone, dolomite and quicklime for producing 1 ton of sinter is expressed in kg/(1000kg of finished sinter); and X represents the mass fraction of the blended internal circulation return ores in the mixed material.
Process variable parameters: m5Representing the sum of the mass fractions of the blended ore, limestone, dolomite, quicklime and fuel (5 materials for short) in the mixture put into the mixer; mfRepresenting the total FeO mass fraction of 5 materials in the mixture; k represents the finished product sintered ore obtained by producing the uniform mixing ore with the dry basis mass of 100.
S2: calculating the dry basis mass of the materials of the sinter production raw materials;
in the embodiment of the application, the expression of the dry basis mass of the material is as follows:
wherein M is5The total mass of the blending ore, the limestone, the dolomite, the quicklime and the fuel accounts for the sum of the mass fractions of the mixture in the mixing machine, AiThe dry basis mass fraction of each material in the blended ore, limestone, dolomite, quicklime and fuel is shown, i represents subscripts of different raw materials, i is 1-5, and the blended ore, limestone, dolomite, quicklime and fuel are respectively and sequentially shown.
S3: calculating the burning loss of the sintering ore production raw material;
in the embodiment of the present application, the expression of the burnout is:
wherein S is5Expressing the burning loss quality sum of the blended ore, limestone, dolomite, quicklime and fuel, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliThe burning loss mass ratio of each material is shown, i represents subscripts of different raw materials, and i is 1-5, and respectively represents blending ore, limestone, dolomite, quicklime and fuel in sequence.
S4: calculating the FeO amount of the sinter production raw material;
in the embodiment of the present application, the expression of the FeO amount is:
wherein M isfRepresenting the total FeO mass fraction, A, of 5 materials in the mixtureiExpressing the dry basis mass fraction of each material in the blending ore, limestone, dolomite, quicklime and fuel, FiAnd (3) representing the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blended ore, limestone, dolomite, quicklime and fuel in sequence.
S5: calculating the burning loss change of the burning loss minus FeO oxidation;
in the embodiment of the present application, since the burning loss detection value includes the increment due to the oxidation of FeO, the burning loss change except the oxidation of FeO needs to be deducted, and the expression of the burning loss change is:
wherein C represents the change in burnout, S5Expressing the burning loss quality sum of the mixed ore, limestone, dolomite, quicklime and fuel, MfThe mass fraction of the total FeO in 5 materials in the mixture is shown.
S6: calculating the quality of finished sintered ore generated by the sintered ore production raw materials;
in the embodiment of the application, the mass K of the finished sintered ore generated by the sintering mixture with the dry basis mass of the blended ore of 100 needs to be calculated. When the return fines are dynamically balanced, the added amount of the return fines (including the bed charge) is equal to the generated amount of the return fines (including the bed charge), so that the expression of the quality of the finished sintered ore can be obtained as follows:
wherein K represents the quality of the finished sintered ore, M5Expressing the sum of the mass fractions of the blended ore, the limestone, the dolomite, the quicklime and the fuel in the mixed material of the mixing machine, X expressing the mass fraction of the blended internal circulation return ore in the mixed material, H expressing the water content mass fraction of the mixed material, S5Expressing the burning loss quality sum of the mixed ore, limestone, dolomite, quicklime and fuel, MfThe mass fraction of the total FeO of the 5 materials in the mixture is shown, and F represents the mass ratio of the FeO of the finished sintered ore.
S7: obtaining a simplified expression of the sintered mineral content of the finished product according to the dry basis mass of the material, the burning loss, the FeO content, the burning loss change and the simplified sintered mineral content of the finished product;
in the embodiment of the application, the simplified expression of the sintered mineral content of the finished product can be obtained by substituting formulas (1) to (3) into formula (4):
wherein K represents the quality of the finished sintered ore, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliExpressing the burning mass ratio of each material, FiAnd F represents the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blending ore, limestone, dolomite, quicklime and fuel in sequence.
S8: calculating the consumption of the dry materials of the uniform mixing ore required by the finished sintered ore according to the simplified expression of the quality of the finished sintered ore;
in the embodiment of the application, the consumption Yi of the dry materials of the uniform mixing ore, which is required by producing 1 ton of finished sintered ore, is calculated. According to the proportional relation: and (5) can be modified by 100/K-Y1/1000, and the expression of the consumption of the blending ore dry material required by obtaining the finished sintered ore is as follows:
wherein, YiThe consumption of dry-base blending ore, limestone, dolomite and quicklime for producing 1 ton of sinter is shown, F is the mass ratio of FeO in finished sinter, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliExpressing the burning mass ratio of each material, FiAnd (3) representing the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blended ore, limestone, dolomite, quicklime and fuel in sequence.
S9: acquiring a dry material consumption correction expression of the uniform mixing ore required by the finished sintered ore according to the dry material consumption of the uniform mixing ore required by the finished sintered ore;
in the embodiment of the application, in consideration of the uncontrollable loss of the mixture and the fact that the terms are taken away along with the flue gas in the sintering process, the expression of the modified expression of the consumption of the dry materials of the uniform mixing ore required by 1 ton of finished sintered ore is modified as follows:
wherein, Y1Expressing the dry basis consumption of the blending ore required by 1 ton of finished sinter, delta expressing the uncontrollable loss rate of the mixture, F expressing the mass ratio of FeO in the finished sinter, and SiExpressing the burning mass ratio of each material, FiRepresents the mass ratio of FeO in each material, AiThe mass fraction of dry basis of each material in the mixed ore, limestone, dolomite, quicklime and fuel is shown, i represents subscripts of different raw materials, i is 1-5, the subscripts respectively represent the mixed ore, limestone, dolomite, quicklime and fuel in sequence, and phi represents the amount of dust carried away by flue gas.
S10: acquiring a burning loss detection value of the blending ore, a burning loss detection value of quicklime, a burning loss detection value of limestone, a burning loss detection value of dolomite, a burning loss detection value of fuel and a FeO control value for producing sintering ore;
in the embodiment of the application, a certain amount of mixed ore for production, limestone, dolomite, quicklime and fuel are taken for drying: the drying temperature is not lower than 100 ℃ and the time is not less than 2 hours; drying and then preparing a sample for later use; detecting the burning loss of the prepared sample: the burning loss is detected by adopting a muffle furnace to roast at 900 ℃, calculating the loss amount of the muffle furnace to obtain a burning loss value, and recording and using the value; preparing a sample from the sintered ore corresponding to the uniformly mixed ore in the production period, detecting the content of FeO, and recording for later use; detecting the FeO content of the prepared sample, and recording for later use; and inquiring and calculating the dry basis percentages of the mixed ore, the limestone, the dolomite, the quicklime and the fuel in the sintering production.
S11: and substituting the data into a dry material consumption correction expression of the uniformly mixed ore required by the finished sintered ore to calculate the consumption of each raw material.
In the present embodiment, each raw material consumption is calculated by substituting all the data in step S10 into equation (7).
The present application is described in detail below with specific examples.
Example 1
The proportion of dry-base mixed ore produced by sintering in a month is 100%, the proportion of quicklime is 6.5%, the proportion of limestone is 4.9%, the proportion of dolomite is 6.4%, the proportion of coal is 6.85%, the dust carrying capacity of flue gas is 2.0kg/t, and the incountable loss correction coefficient is 0.97).
1) Detecting 8.05% of burning loss of the mixed ore, 9% of burning loss of quicklime, 42.56% of burning loss of limestone, 44% of burning loss of dolomite and 84% of burning loss of coal;
2) controlling the FeO content of the produced sinter according to 8 percent;
3) substituting corresponding data into a formula for calculation;
4) the results of the calculations are compared to production statistics in table 1.
| Item | Mixing ore | Quick lime | Limestone | Dolomite | Pulverized coal |
| Calculation results | 843.06 | 57.91 | 42.01 | 54.78 | 55.89 |
| Statistical results | 850.50 | 56.36 | 43.66 | 56.36 | 54.71 |
5) The production statistical measure is basically equivalent to the consumption calculated by a formula.
Example 2
The proportion of dry-base mixed ore produced by sintering in a certain month is 100%, the proportion of quick lime is 5.92%, the proportion of limestone is 4.78%, the proportion of dolomite is 7.6%, the proportion of coal is 6.82%, the dust carrying capacity of flue gas is 2.0kg/t, and the incountable loss correction coefficient is 0.97). The results of the calculations are compared to the production statistics in table 2.
1) Detecting 6.75% of burning loss of the mixed ore, 3.47% of burning loss of quicklime, 42.56% of burning loss of limestone, 46.4% of burning loss of dolomite and 88.96% of burning loss of coal;
2) controlling the FeO content of the produced sinter according to 8 percent;
3) substituting corresponding data into a formula for calculation;
4) the results of the calculations are compared to the production statistics in table 2.
5) The production statistical measure is basically equivalent to the consumption calculated by a formula.
The method for calculating the consumption of the raw materials of the sinter ore provided by the invention has the advantages of simple principle, quickness in calculation and obvious effect, can obviously avoid large fluctuation of the ingredients of the uniformly mixed ore, and meets the requirements of sintering and blast furnaces.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for calculating raw material consumption of sinter, the method comprising the steps of:
setting the dry basis mass of the mixed ore in the production raw material of the sinter ore as 100;
calculating the dry basis mass of the materials of the sinter production raw materials;
calculating the burning loss of the sintering ore production raw material;
calculating the FeO amount of the sinter production raw material;
calculating the burning loss change of the burning loss minus FeO oxidation;
calculating the quality of finished sintered ore generated by the sintered ore production raw materials;
obtaining a simplified expression of the sintered mineral content of the finished product according to the dry basis mass of the material, the burning loss, the FeO content, the burning loss change and the simplified sintered mineral content of the finished product;
calculating the consumption of the dry materials of the uniform mixing ore required by the finished sintered ore according to the simplified expression of the quality of the finished sintered ore;
acquiring a dry material consumption correction expression of the uniform mixing ore required by the finished sintered ore according to the dry material consumption of the uniform mixing ore required by the finished sintered ore;
acquiring a burning loss detection value of the blending ore, a burning loss detection value of quicklime, a burning loss detection value of limestone, a burning loss detection value of dolomite, a burning loss detection value of fuel and a FeO control value for producing sintering ore;
and substituting the data into a dry material consumption correction expression of the uniformly mixed ore required by the finished sintered ore to calculate the consumption of each raw material.
2. The method of calculating sinter ore raw material consumption according to claim 1, wherein the expression of the dry basis mass of the material is:
wherein M is5Representing the total mass of the blending ore, the limestone, the dolomite, the quicklime and the fuel occupying the machine for mixingThe sum of the mass fractions of the materials, AiExpressing the dry basis mass fractions of materials in the mixed ore, limestone, dolomite, quicklime and fuel; i represents subscripts of different raw materials, i is 1-5, and represents blended ore, limestone, dolomite, quicklime and fuel in sequence.
3. The method of calculating the consumption of sinter ore as claimed in claim 1, wherein the expression for the burnout is:
wherein S is5Expressing the burning loss quality sum of the blended ore, limestone, dolomite, quicklime and fuel, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliThe burning loss mass ratio of each material is shown, i represents subscripts of different raw materials, and i is 1-5, and respectively represents blending ore, limestone, dolomite, quicklime and fuel in sequence.
4. The method for calculating the consumption of a sinter ore raw material as claimed in claim 1, wherein the amount of FeO is expressed by:
wherein M isfRepresenting the total FeO mass fraction, A, of 5 materials in the mixtureiExpressing the dry basis mass fraction of each material in the blending ore, limestone, dolomite, quicklime and fuel, FiAnd (3) representing the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blended ore, limestone, dolomite, quicklime and fuel in sequence.
5. The method of calculating the consumption of sinter ore as claimed in claim 1, wherein the change in the burn-out is expressed by:
wherein C represents the change in burnout, S5Expressing the burning loss quality sum of the mixed ore, limestone, dolomite, quicklime and fuel, MfThe mass fraction of the total FeO in 5 materials in the mixture is shown.
6. The method of calculating sinter ore raw material consumption according to claim 1, wherein the expression of finished sinter ore quality is:
wherein K represents the quality of the finished sintered ore, M5Expressing the sum of the mass fractions of the blended ore, the limestone, the dolomite, the quicklime and the fuel in the mixed material of the mixing machine, X expressing the mass fraction of the blended internal circulation return ore in the mixed material, H expressing the water content mass fraction of the mixed material, S5Expressing the burning loss quality sum of the mixed ore, limestone, dolomite, quicklime and fuel, MfThe mass fraction of the total FeO of the 5 materials in the mixture is shown, and F represents the mass ratio of the FeO of the finished sintered ore.
7. The method of calculating the consumption of sinter ore raw material according to claim 1, wherein the simplified expression of the quality of finished sinter ore is:
wherein K represents the quality of the finished sintered ore, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliExpressing the burning mass ratio of each material, FiShow each thingAnd F represents the mass ratio of FeO in the finished sintered ore, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blended ore, limestone, dolomite, quicklime and fuel in sequence.
8. The method for calculating the consumption of the raw materials of the sinter as claimed in claim 1, wherein the expression of the consumption of the dry materials of the uniform mixing ore required by the finished sinter is as follows:
wherein, YiThe consumption of dry-base blending ore, limestone, dolomite and quicklime for producing 1 ton of sinter is shown, F is the mass ratio of FeO in finished sinter, AiExpressing the dry basis mass fraction S of each material in the blending ore, limestone, dolomite, quicklime and fueliExpressing the burning mass ratio of each material, FiAnd (3) representing the mass ratio of FeO in each material, i represents subscripts of different raw materials, and i is 1-5, and respectively represents the blended ore, limestone, dolomite, quicklime and fuel in sequence.
9. The method for calculating the consumption of the raw materials of the sinter as claimed in claim 1, wherein the expression of the modified expression of the consumption of the dry materials of the uniform mixing ore required by the finished sinter is as follows:
wherein, Y1Expressing the dry basis consumption of the blending ore required by 1 ton of finished sinter, delta expressing the uncontrollable loss rate of the mixture, F expressing the mass ratio of FeO in the finished sinter, and SiExpressing the burning mass ratio of each material, FiRepresents the mass ratio of FeO in each material, AiThe dry basis mass fraction of each material in the blended ore, limestone, dolomite, quicklime and fuel is shown, i represents subscripts of different raw materials, i is 1-5, and respectively represents the blended ore, the limestone and the dolomite in sequenceThe stone, the quicklime and the fuel phi represent the amount of the mineral dust taken away by the flue gas.
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