CN109781927A - The method for calculating sinter ore deposit consumption - Google Patents
The method for calculating sinter ore deposit consumption Download PDFInfo
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- CN109781927A CN109781927A CN201910012157.9A CN201910012157A CN109781927A CN 109781927 A CN109781927 A CN 109781927A CN 201910012157 A CN201910012157 A CN 201910012157A CN 109781927 A CN109781927 A CN 109781927A
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Abstract
The invention discloses a kind of methods for calculating sinter ore deposit consumption, belong to metallurgical engineering sintering technology field.It includes FeO content in the ore matching being made of iron charge F, flux B and fuel C dried using the measurement of standardized titration method, and utilizes relationship: scaling loss correction value=actual measurement scaling loss value+FeO content × [(16 × 2)/(56+16) × 4] is modified the scaling loss value of ore matching；Numerical value after amendment is brought into again in the calculation formula of theoretical ore deposit consumption, and be compared with practical ore deposit consumption, obtains KIt is theoreticalWith KIt is practicalBetween deviation control verify its accuracy within 1%, and through sintering cup test.Accurate calculating of this method to sinter ore deposit consumption, it is ensured that actual production is gone on smoothly.
Description
Technical field
The present invention relates to the measurement methods of sinter ore deposit consumption, belong to metallurgical engineering sintering technology field, more particularly to one
The method that kind calculates sinter ore deposit consumption.
Background technique
The consumption of various iron materials is estimated according to its scaling loss all the time in sinter, and the inspection of scaling loss is done in laboratory
It surveys and uses Muffle furnace apparatus, temperature control calculates its loss amount after roasting at 950~1000 DEG C and obtains scaling loss value.Wherein, it surveys
Determine scaling loss value and is mostly derived from mass change caused by the removing, oxidation oxygen uptake and compound decomposition of the crystallization water.It is mixed in sintering at present
During even ore matching, the proportion of magnetic iron ore may be up to 20%, such as still continue to use the calculation of negative scaling loss, with practical firing rate it
Between there are certain deviation, inconvenience is as the reference standard produced.In order to avoid with mine unit and for mine unit and measurement unit
The larger dispute of three, it is necessary to carry out a large amount of experimental study, find out association between the two, this is sintered cost to control, subtracts
Few iron material inventory is meaningful.
Periodical " Wuhan Iron and Steel Plant technology ", the 2nd phase of volume 55, that publishes in April, 2017 " determines the test for being sintered practical ore deposit consumption
Research " it proposes according to the sintering of simple ore kind and ore matching sintering test as a result, being carried out to theoretical calculation firing rate and practical firing rate
Comparison, as a result, it has been found that the deviation of theoretical calculation firing rate and practical firing rate analyzes reason all within 1% in addition to domestic mine,
Mass change caused by the removing, oxidation oxygen uptake and compound that measurement scaling loss value is mostly derived from the crystallization water are decomposed.In sintering process
The removing of the crystallization water is consistent with the removing of crystallization water when measurement scaling loss, therefore the bloodstone and limonite that impurity content is few, practical
Firing rate in sintering process can be directly calculated with scaling loss value, deviation very little, but magnetic iron ore is when measuring scaling loss
Oxygen uptake process and the oxygen uptake process in sintering process are less consistent, therefore the firing rate of magnetic iron ore is calculated with scaling loss value and existed partially
Difference, and because domestic mine impurity content is higher, it is inconsistent when there are some chemical reactions during the sintering process with measurement scaling loss.It is comprehensive
There are deviations for the above reason, domestic mine theory firing rate and practical firing rate.It is main that deviation occur in high fine iron ore and comprehensive fine ore
It is due to the part of magnetic iron ore oxidation oxygen uptake being converted into scaling loss, corrects scaling loss value (correction value=scaling loss+oxidation containing magnetic iron ore
Weight content × 8/72, and by calculating discovery, it is calculated using revised scaling loss, theoretical firing rate and reality are burnt into
Deviation between rate is all within 1%.Also, the document also calculates Sintering Yield under the assumed condition of sinter returns balance,
Calculation formula is as follows:
1t iron ore output=various iron ores are with dosage × (the various iron ore moisture of 1-) × (various iron ore scaling loss of 1-)+various
Flux with dosage × (the various flux moisture of 1-) × (the various flux scaling loss of 1-)+fuel blending amount × (1- fuel moisture) ×
(1- fuel scaling loss)；
1t sinter consumes iron material=1/1t iron ore output.
It is consumed by the theoretical ton that relevant calculation obtains the calculating of raw material scaling loss and the deviation of practical ton consumption is 2% or so, however,
The deviation or bigger that above-mentioned theory ton consumption is consumed with practical ton, it is little to the directive significance of actual production.
Summary of the invention
In order to solve the above technical problems, the present invention provides it is a kind of calculate sinter ore deposit consumption method, this method by pair
Actual measurement scaling loss value is brought into the calculation formula of theoretical ore deposit consumption after being modified, and is compared with practical ore deposit consumption, is obtained KIt is theoretical
With KIt is practicalBetween deviation control within 1%, this method has important directive significance to actual production.
To achieve the above object, the invention discloses a kind of methods for calculating sinter ore deposit consumption, it includes being dripped using standard
Determine FeO content in the ore matching being made of iron charge F, flux B and fuel C that method measurement has been dried, and utilizes following mathematical relationship Formulas I
The scaling loss value of ore matching is modified:
Scaling loss correction value=actual measurement scaling loss value+FeO content × [(16 × 2)/(56+16) × 4]；Formulas I
It is that front and back loss amount is calculated after ore matching to be placed in Muffle kiln roasting that scaling loss value is surveyed in the Formulas I；
Wherein, the process dried by the ore matching that iron charge F, flux B and fuel C form is as follows:
It takes the ore matching after mixing and places it in baking oven, temperature is not less than 100 DEG C, dry at least four hour, for use.
Preferably, iron charge F includes at least one of magnetic iron ore, limonite, bloodstone, siderite, speculum iron., especially
It is for Fe3O4The high magnetic iron ore of content has biggish meaning
Preferably, flux B includes at least one of lime stone, dolomite or quick lime.
Preferably, fuel C includes at least one of anthracite or coke powder.
Meanwhile standardized titration method measurement ore matching in FeO content process be use mass fraction for 5% potassium bichromate mark
The raw material testing liquid of quasi- solution titration ore matching, and pass through chemical equation: 6Fe2++Cr2O7 2-+14H+=6Fe3++2Cr3++
7H2The volume of the raw material testing liquid of the volume and ore matching of O and potassium bichromate standard solution calculates Fe2+And the content of FeO.
In addition, in Formulas I: scaling loss correction value=actual measurement scaling loss value+FeO content × [(16 × 2)/(56+16) × 4] foundation
It is following chemical equation:
4FeO+O2=2Fe2O3
On the basis of the above-mentioned scaling loss value to ore matching is modified, it is taken to the calculating of the theoretical ore deposit consumption of sinter
In formula, and following mathematical relationship Formula II gives the theoretical ore deposit consumption of sinter:
KIt is theoretical=I/S；Formula II
In formula, KIt is theoreticalIt indicates without under returning mine, iron charge needed for production unit sinter, unit kg/t；
I indicates iron charge, that is, butt amount consumed by production ton sinter, unit kg；
S indicates finished product sinter amount after sintering, unit t；
Under the conditions of normal sintering production, supplying return mine and what production process generated returns mine and is eventually consistent, i.e.,
Reach sinter returns balance, and finished product sinter amount S is equivalent to the sum of iron charge F, flux B and the output of fuel C of supplying, that is, meets such as
Lower relationship II-1:
S=FOutput+BOutput+COutput；Formula II -1
And the output of iron charge F, flux B and fuel C meet following relationship respectively in Formula II -1:
FOutput=various iron ore adapted ratio × (the various iron ore moisture of 1-) × (various iron ore scaling loss correction values of 1-)；
Formula II -2
BOutput=various flux adapted ratio × (various flux moisture of 1-) × (the various flux of 1- survey scaling loss values)；
Formula II -3
COutput=various fuel blending ratio × (various fuel moistures of 1-) × (the various fuel of 1- survey scaling loss values)；
Formula II -4
Each iron charge that the present invention selects is sintered respectively, its chemical composition is obtained and is listed as follows shown in table 1:
1 chemical composition list of table
Remarks: mineral are more typical mineral in Iron Ore Matching in Sintering in table, as magnetic iron ore, limonite, bloodstone, siderite,
Speculum iron.
In conjunction with table 1 it is found that the amendment scaling loss value in table 1 is to be calculated using the calculation formula of above-mentioned Formulas I.
At the same time, the practical ore deposit consumption K of sinterIt is practicalMeet following mathematical relationship formula III:
KIt is practical=various iron ore adapted ratio/(firing rates × yield rate)；Formula III；
And firing rate=whole output sinter/upper doses, yield rate=output/whole output sinter；
KIt is theoreticalWith KIt is practicalIt is compared and calculates and deviate, deviation controls within 1%.
The beneficial effects are mainly reflected as follows following aspects:
1, the calculation method that the present invention designs accurately is corrected by the scaling loss value to ore matching, and correction value is substituted into mine
In the calculation formula of consumption, being compared with practical ore deposit consumption, deviation controls within 1% controlled range, therefore, what the present invention designed
Ore deposit consumption calculation method has preferable directive function to actual production.
2, the ore deposit consumption calculation method that the present invention designs can accurately instruct procurement scheme, to reduce overstocking for fund.
Specific embodiment
In order to better explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
The contents of the present invention are not limited solely to following embodiment.
Embodiment 1
Present embodiment discloses a kind of methods for calculating sinter ore deposit consumption, use the iron charge in specification table 1, and control
Each iron ore proportion is as shown in table 2 below:
2 iron ore of table matches % list (one)
Meanwhile the iron material of the present embodiment use, various flux, the adapted situation of various fuel are as shown in table 3 below:
The experiment proportion of table 3 % list (one)
Iron charge output, flux output and fuel output in computational chart 3, and:
F output=various iron ores adapted ratio × (the various iron ore moisture of 1-) × (the various iron ore correction values of 1-)=
0.4798；
B output=various flux adapted ratio × (the various flux moisture of 1-) × (the various flux of 1- survey scaling loss value)=
0.0760；
C output=various fuel blendings ratio × (the various fuel moistures of 1-) × (the various fuel of 1- survey scaling loss value)=
0.0038；
Output=0.5596 S=F output+B output+C；
KIt is theoretical=I/S=1 × 53.8%/0.5654=961.3kg/t
Each raw material proportioning shown in table 3 is mixed, ore matching sintering test is carried out, test result is as shown in table 4:
4 ore matching sintering test the results list (one) of table
Wherein, the firing rate in table 4=whole output sinter/upper doses, yield rate=output/whole output sintering
Mine；
KIt is practical=various iron ore adapted ratio/(firing rate × yield rate)=53.8% ÷ (83.33% × 67.14%)=
961.6kg/t
Therefore KIt is theoreticalWith KIt is practicalBetween differ 0.03kg/t, deviation between the two is controlled 0.03%.
Embodiment 2
Present embodiment discloses a kind of methods for calculating sinter ore deposit consumption, use the iron charge in specification table 1, and control
Each iron ore proportion is as shown in table 5 below:
5 iron ore of table matches % list (two)
Meanwhile the iron material of the present embodiment use, various flux, the adapted situation of various fuel are as shown in table 6 below:
The experiment proportion of table 6 % list (two)
Iron charge output, flux output and fuel output in computational chart 6, and:
FOutput=various iron ore adapted ratio × (the various iron ore moisture of 1-) × (various iron ore correction values of 1-)=
0.4712；
BOutput=various flux adapted ratio × (various flux moisture of 1-) × (the various flux of 1- survey scaling loss values)=
0.0760；
COutput=various fuel blending ratio × (various fuel moistures of 1-) × (the various fuel of 1- survey scaling loss values)=
0.0039；
S=FOutput+BOutput+COutput=0.5511；
KIt is theoretical=I/S=1 × 53.7%/0.5569=964.2kg/t
Each raw material proportioning shown in table 6 is mixed, ore matching sintering test is carried out, test result is as shown in table 7:
7 ore matching sintering test the results list (two) of table
Wherein, the firing rate in table 7=whole output sinter/upper doses, yield rate=output/whole output sintering
Mine；
KIt is practical=various iron ore adapted ratio/(firing rate × yield rate)=53.8% ÷ (82.38% × 68.21%)=
955.7kg/t
Therefore KIt is theoreticalWith KIt is practicalBetween differ 8.5kg/t, deviation between the two is controlled 0.9%.
Embodiment 3
Present embodiment discloses a kind of methods for calculating sinter ore deposit consumption, use the iron charge in specification table 1, and control
Each iron ore proportion is as shown in table 8 below:
8 iron ore of table matches % list (three)
Meanwhile the iron material of the present embodiment use, various flux, the adapted situation of various fuel are as shown in table 9 below:
The experiment proportion of table 9 % list (three)
Iron charge output, flux output and fuel output in computational chart 9, and:
FOutput=various iron ore adapted ratio × (the various iron ore moisture of 1-) × (various iron ore correction values of 1-)=
0.4824；
BOutput=various flux adapted ratio × (various flux moisture of 1-) × (the various flux of 1- survey scaling loss values)=
0.0760；
COutput=various fuel blending ratio × (various fuel moistures of 1-) × (the various fuel of 1- survey scaling loss values)=
0.0038；
S=FOutput+BOutput+COutput=0.5622；
KIt is theoretical=I/S=1 × 53.8%/0.5622=956.9kg/t；
Each raw material proportioning shown in table 9 is mixed, ore matching sintering test is carried out, test result is as shown in table 10:
10 ore matching sintering test the results list (three) of table
Wherein, the firing rate in table 10=whole output sinter/upper doses, yield rate=output/whole output are burnt
Tie mine；
KIt is practical=various iron ore adapted ratio/(firing rate × yield rate)=53.8% ÷ (81.97% × 68.51%)=
958.0kg/t
Therefore KIt is theoreticalWith KIt is practicalBetween differ 1.1kg/t, deviation between the two is controlled 0.1%.
Ibid, continue to repeat that above-mentioned iron material, flux and fuel is selected to be tested, and calculate KIt is theoreticalWith KIt is practical, obtain as
The following table 11 theory ton consumption consumes list with practical ton:
11 list of table (four)
As can be seen from the above embodiments, the method that the present invention designs will manage on the basis of being modified to actual measurement scaling loss value
It is controlled within 1% by the deviation between ton consumption and practical ton consumption, on the basis of rationally utilizing existing ore resources, guarantees production
It goes on smoothly.
Above embodiments are only best citing, rather than a limitation of the embodiments of the present invention.Except above-described embodiment
Outside, there are also other embodiments by the present invention.All technical solutions formed using equivalent substitution or equivalent transformation, all fall within the present invention
It is required that protection scope.
Claims (3)
1. a kind of method for calculating sinter ore deposit consumption, it includes having been dried using the measurement of standardized titration method by iron charge F, flux B
And FeO content in the ore matching of fuel C composition, and be modified using scaling loss value of the following mathematical relationship Formulas I to ore matching:
Scaling loss correction value=actual measurement scaling loss value+FeO content × [(16 × 2)/(56+16) × 4]；Formulas I
It is that front and back loss amount is calculated after ore matching to be placed in Muffle kiln roasting that scaling loss value is surveyed in the Formulas I；
It further includes the theoretical ton consumption that sinter is calculated using following mathematical relationship Formula II:
KIt is theoretical=I/S；Formula II
In Formula II, KIt is theoreticalIt indicates without under returning mine, iron charge needed for production unit sinter, unit kg/t；
I indicates iron charge, that is, butt amount consumed by production ton sinter, unit kg；
S indicates finished product sinter amount after sintering, unit t；
Under the conditions of normal sintering production, supplying return mine and what production process generated returns mine and is eventually consistent, that is, reach
Sinter returns balance, and finished product sinter amount S is equivalent to the sum of iron charge F, flux B and the output of fuel C of supplying, that is, meets following number
Learn relational expression II-1:
S=FOutput+BOutput+COutput；Formula II -1
And the output of iron charge F, flux B and fuel C meet following relationship respectively in Formula II -1:
FOutput=various iron ore adapted ratio × (the various iron ore moisture of 1-) × (various iron ore scaling loss correction values of 1-)；Formula II -2
BOutput=various flux adapted ratio × (various flux moisture of 1-) × (the various flux of 1- survey scaling loss values)；Formula II -3
COutput=various fuel blending ratio × (various fuel moistures of 1-) × (the various fuel of 1- survey scaling loss values)；Formula II -4
The practical ore deposit consumption K of sinter is practical to meet following mathematical relationship formula III:
KIt is practical=various iron ore adapted ratio/(firing rates × yield rate)；Formula III；
And firing rate=whole output sinter/upper doses, yield rate=output/whole output sinter；
KIt is theoreticalWith KIt is practicalIt is compared and calculates and deviate, deviation controls within 1%.
2. calculating the method for sinter ore deposit consumption according to claim 1, it is characterised in that: the iron charge F includes magnetic iron ore, brown
At least one of iron ore, bloodstone, siderite, speculum iron.
3. the method according to claim 1 or claim 2 for calculating sinter ore deposit consumption, it is characterised in that: the flux B includes lime
At least one of stone, dolomite or quick lime；The fuel C includes at least one of anthracite or coke powder.
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Application publication date: 20190521 |