CN107037787B - A kind of grate-kiln pelletizing burnup control method and device - Google Patents

Abstract

The embodiment of the invention provides a kind of grate-kiln pelletizing burnup control method and device, and wherein method includes: the estimated value G for i) obtaining fuel needed for pelletizing burns₁；Ii) according to G₁, pelletizing burning when technique and environmental conditions parameter, heat balance equation, obtain the Actual combustion heat release value Q of fuel₇；Iii) according to Q₇, obtain the actual consumption value G of fuel₂；Iv) judge G₂With G₁It is whether equal；If v) unequal, by G₂It is assigned to G₁, and repeat step ii)~v), until G₂With G₁It is equal；Vi) according to G₂Fuel is controlled.The present invention is according to pelletizing production process materials balance and pelletizing fuel dosage of heat Balance Calculation under the premise of guaranteeing finished pellet mineral figureofmerit, burnup is more accurately controlled according to the result of recursive calculation, so that reaching reduces cost, energy-saving and environment-friendly effect.

Description

A kind of grate-kiln pelletizing burnup control method and device

Technical field

The present invention relates to metallurgical technology field more particularly to a kind of grate-kiln pelletizing burnup control method and dresses It sets.

Background technique

In steel and iron industry, iron ore acid pellet is important blast furnace burden, and production technology is current optimization State of Blast Furnace Expect the developing direction of structure.The production process of acid pellet generally comprises: will first mix the fuel system such as the raw materials such as concentrate and coal dust At viscous consistency, with the green-ball of sufficient intensity, after drying, preheating in oxidizing atmosphere as revolution roasting in kilns, make green-ball Conglomeration, thus finished product pellet.

In the today for advocating energy-saving and emission-reduction, the consumption of fuel in acid pellet production process how is reduced, urgently at one Problem to be solved.In the prior art, be all often according to estimated by rule of thumb the case where raw material in requisition for fuel quantity, not only Accuracy is not high, more extensive, and poor in timeliness, can not change to working condition and give a response in time, therefore be easy to cause The waste (fuel ratio is bigger than normal) of fuel or pellet are not grilled thoroughly (fuel ratio is less than normal), or even sometimes for avoiding pelletizing The occurrence of mine is not grilled thoroughly, and deliberately it is designed as that fuel ratio is bigger than normal, this just more results in the waste and cost of fuel Increase.

Summary of the invention

To overcome problems of the prior art, the present invention provides a kind of grate-kiln pelletizing burnup controlling party Method and device, to reduce the waste of fuel in rotary kiln acid pellet production process.

According to a first aspect of the embodiments of the present invention, a kind of grate-kiln pelletizing burnup control method is provided, it is described Method includes:

I) the estimated value G of fuel needed for pelletizing burns is obtained₁；

Ii) according to the estimated value G of required fuel₁, pelletizing burning when technique and environmental conditions parameter, heat balance equation, Obtain the Actual combustion heat release value Q of fuel₇；

Iii) according to the Actual combustion heat release value Q of the fuel₇, obtain the actual consumption value G of fuel₂；

Iv) judge G₂With G₁It is whether equal；

If v) unequal, by G₂It is assigned to G₁, and repeat step ii)~v), until G₂With G₁It is equal；

Vi) according to G₂Fuel is controlled.

Optionally, the estimated value G of fuel needed for pelletizing burns is obtained₁, comprising:

Material data is obtained, the material data includes the accounting of material ingredient and each ingredient；

According to the material data and input and output material balance formula, the estimated value of fuel needed for pelletizing burns is obtained G₁。

Optionally, according to the estimated value G of required fuel₁, pelletizing burning when technique and environmental conditions parameter, thermal balance it is public Formula obtains the Actual combustion heat release value Q of fuel₇, comprising:

According to G₁, pelletizing burning when technique and environmental conditions parameter, respectively obtain: the heat Q that green-ball is brought into₁, green-ball water Divide the heat Q brought into₂, gas for ignition burning release heat Q₃, FeO oxidation release heat Q₄, the heat Q that brings into of air₅、 Fuel physical heat release Q₆, and, exhaust heat Q¹, the heat Q that takes away of water evaporation², the heat taken away of spreading and dedusting ash Q³, body heat dissipation and lose heat Q⁴, the heat Q that walks of finished pellet mine belt⁵, leak out heat dissipation and lose heat Q⁶；

According to heat balance equation

Q₁+Q₂+Q₃+Q₄+Q₅+Q₆+Q₇=Q¹+Q²+Q³+Q⁴+Q⁵+Q⁶

Obtain the Actual combustion heat release value Q of fuel₇。

Optionally, the heat Q for obtaining green-ball and bringing into₁Include:

According to

Q₁=C_{It is mixed}×G_{It is mixed}×T₁

Obtain Q₁, wherein C_{It is mixed}For dry mixture specific heat, G_{It is mixed}For dry mixture quality, T₁For green-ball temperature；

The heat Q for obtaining green-ball moisture and bringing into₂Include:

According to

Q₂=C₂×G_Water×T₁

Obtain Q₂, wherein C₂For the specific heat of moisture, G_WaterFor the quality of moisture in green-ball, T₁For green-ball temperature；

The heat Q for obtaining gas for ignition burning and releasing₃Include:

According to

Q₃=q₁×V_{Coal gas}

Obtain Q₃, wherein q₁For coal gas low heat value, V_{Coal gas}For gas consumption in ignition amount；

The heat Q for obtaining FeO oxidation and releasing₄Include:

According to

Q₄=C_FeO×(H₁×G_Essence-H₀×G_Ball)

Obtain Q₄, wherein C_FeOFor unit quality FeO oxidation heat liberation amount, H₁For the content for mixing FeO in concentrate, H₀For finished product The content of FeO, G in pellet_EssenceTo mix concentrate quality, G_BallFor finished ball pellet quality；

The heat Q for obtaining air and bringing into₅Include:

According to

Q₅=T₀×C₃×V₁

Obtain Q₅, wherein T₀For air themperature, C₃For air at room temperature specific heat, V₁For total blast volume；

The acquisition fuel physical heat release Q₆Include:

According to

Q₆=C₄×G₁×T_Combustion

Obtain Q₆, wherein C₄For the entalpy of fuel, T_CombustionFor the temperature of fuel at normal temperature.

Optionally, the acquisition exhaust heat Q¹Include:

According to

Q¹=C₅×V₂×T₂+C₆×V₃×T₃+C_{In advance}×V₄×T_{In advance}

Obtain Q¹, wherein C₅For blasting drying period exhaust gas specific heat, V₂For blasting drying period exhausted air quantity, T₂For blasting drying period Air themperature, C₆For down-draft drying zone exhaust gas specific heat, V₃For down-draft drying zone exhausted air quantity, V₄To preheat I sections of exhausted air quantities, T₃To take out Air-dry dry and I sections of exhaust gas temperature of preheating, C_{In advance}To preheat I sections of exhaust gas specific heats, T_{In advance}To preheat I sections of exhaust gas temperature；

The heat Q for obtaining water evaporation and taking away²Include:

According to

Q²=J₁×G_Water

Obtain Q², wherein J₁Heat required for water evaporation for unit quality, G_WaterFor the quality of moisture in green-ball；

The heat Q that the acquisition spreading and dedusting ash are taken away³Include:

According to

Q³=C₇×T₄×(G_{It spreads}+G_Dirt)

Obtain Q³, wherein C₇For spreading and dedusting ash specific heat, T₄For returning charge mean temperature, G_{It spreads}For spreading amount, G_DirtFor dedusting ash Amount；

The heat Q for obtaining body heat dissipation and losing⁴Include:

According to

Q⁴=X₁×(T₅-T₀)×λ₁+X₂×(T₆-T₀)×λ₂+X₃×(T₇-T₀)×λ₃

+X₄×(T₈-T₀)×λ₄

Obtain Q⁴, wherein X₁For drying grate surface area, X₂For rotary kiln surface product, X₃For ring cold machine surface area, X₄For pipeline Surface area, λ₁For drying grate coefficient of heat transfer, λ₂For rotary kiln coefficient of heat transfer, λ₃For ring cold machine coefficient of heat transfer, λ₄For heat dissipation of pipeline system Number, T₅For drying grate surface temperature, T₆For rotary kiln surface temperature, T₇For ring cold machine surface temperature, T₈For pipe temperature, T₀For ring Border air themperature；

The heat Q for obtaining finished pellet mine belt and walking⁵Include:

According to

Q⁵=G_Ball×C_Ball×T₉

Obtain Q⁵, wherein C_BallFor finished ball nodulizing avergae specific heat, G_BallFor finished ball pellet quality, T₉For finished ball after cooling The temperature of nodulizing；

The acquisition, which is leaked out, radiates and the heat Q of loss⁶Include:

According to

Q⁶=L × C₉×T₁₀×V₅

Obtain Q⁶, wherein L is drying grate air leak rate of air curtain, C₉For the exhaust gas specific heat that leaks out, T₁₀For exhaust gas temperature, V₅It is logical for drying grate Cross air quantity.

According to a second aspect of the embodiments of the present invention, a kind of grate-kiln pelletizing burn-up control assembly is provided, it is described Device includes:

Fuel initial setup module, for obtaining the estimated value G of fuel needed for pelletizing burns₁；

Fuel calculation module, for the estimated value G according to required fuel₁, pelletizing burning when technique and environmental condition ginseng Number, heat balance equation, obtain the Actual combustion heat release value Q of fuel₇；According to the Actual combustion heat release value Q of the fuel₇, obtain combustion The actual consumption value G of material₂；Judge G₂With G₁It is whether equal；If unequal, by G₂It is assigned to G₁, and recalculate G₂, until G₂With G₁It is equal；

Fuel control module, for according to G₂Fuel is controlled.

Optionally, the fuel initial setup module includes:

Material data acquisition submodule, for obtaining material data, the material data includes material ingredient and each The accounting of ingredient；

Fuel initial estimate acquisition submodule is used for according to the material data and input and output material balance formula, Obtain the estimated value G of fuel needed for pelletizing burns₁。

Optionally, the fuel calculation module is in the estimated value G according to required fuel₁, pelletizing burning when technique and ring Border conditional parameter, heat balance equation obtain the Actual combustion heat release value Q of fuel₇When, it is used for:

According to G₁, pelletizing burning when technique and environmental conditions parameter, respectively obtain: the heat Q that green-ball is brought into₁, green-ball water Divide the heat Q brought into₂, gas for ignition burning release heat Q₃, FeO oxidation release heat Q₄, the heat Q that brings into of air₅、 Fuel physical heat release Q₆, and, exhaust heat Q¹, the heat Q that takes away of water evaporation², the heat taken away of spreading and dedusting ash Q³, body heat dissipation and lose heat Q⁴, the heat Q that walks of finished pellet mine belt⁵, leak out heat dissipation and lose heat Q⁶；

According to heat balance equation

Q₁+Q₂+Q₃+Q₄+Q₅+Q₆+Q₇=Q¹+Q²+Q³+Q⁴+Q⁵+Q⁶

Obtain the Actual combustion heat release value Q of fuel₇。

Optionally, the heat Q for obtaining green-ball and bringing into₁Include:

According to

Q₁=C_{It is mixed}×G_{It is mixed}×T₁

Obtain Q₁, wherein C_{It is mixed}For dry mixture specific heat, G_{It is mixed}For dry mixture quality, T₁For green-ball temperature；

The heat Q for obtaining green-ball moisture and bringing into₂Include:

According to

Q₂=C₂×G_Water×T₁

Obtain Q₂, wherein C₂For the specific heat of moisture, G_WaterFor the quality of moisture in green-ball, T₁For green-ball temperature；

The heat Q for obtaining gas for ignition burning and releasing₃Include:

According to

Q₃=q₁×V_{Coal gas}

Obtain Q₃, wherein q₁For coal gas low heat value, V_{Coal gas}For gas consumption in ignition amount；

The heat Q for obtaining FeO oxidation and releasing₄Include:

According to

Q₄=C_FeO×(H₁×G_Essence-H₀×G_Ball)

Obtain Q₄, wherein C_FeOFor unit quality FeO oxidation heat liberation amount, H₁For the content for mixing FeO in concentrate, H₀For finished product The content of FeO, G in pellet_EssenceTo mix concentrate quality, G_BallFor finished ball pellet quality；

The heat Q for obtaining air and bringing into₅Include:

According to

Q₅=T₀×C₃×V₁

Obtain Q₅, wherein T₀For air themperature, C₃For air at room temperature specific heat, V₁For total blast volume；

The acquisition fuel physical heat release Q₆Include:

According to

Q₆=C₄×G₁×T_Combustion

Obtain Q₆, wherein C₄For the entalpy of fuel, T_CombustionFor the temperature of fuel at normal temperature.

Optionally, the acquisition exhaust heat Q¹Include:

According to

Q¹=C₅×V₂×T₂+C₆×V₃×T₃+C_{In advance}×V₄×T_{In advance}

Obtain Q¹, wherein C₅For blasting drying period exhaust gas specific heat, V₂For blasting drying period exhausted air quantity, T₂For blasting drying period Air themperature, C₆For down-draft drying zone exhaust gas specific heat, V₃For down-draft drying zone exhausted air quantity, V₄To preheat I sections of exhausted air quantities, T₃To take out Air-dry dry and I sections of exhaust gas temperature of preheating, C_{In advance}To preheat I sections of exhaust gas specific heats, T_{In advance}To preheat I sections of exhaust gas temperature；

The heat Q for obtaining water evaporation and taking away²Include:

According to

Q²=J₁×G_Water

Obtain Q², wherein J₁Heat required for water evaporation for unit quality, G_WaterFor the quality of moisture in green-ball；

The heat Q that the acquisition spreading and dedusting ash are taken away³Include:

According to

Q³=C₇×T₄×(G_{It spreads}+G_Dirt)

Obtain Q³, wherein C₇For spreading and dedusting ash specific heat, T₄For returning charge mean temperature, G_{It spreads}For spreading amount, G_DirtFor dedusting ash Amount；

The heat Q for obtaining body heat dissipation and losing⁴Include:

According to

Q⁴=X₁×(T₅-T₀)×λ₁+X₂×(T₆-T₀)×λ₂+X₃×(T₇-T₀)×λ₃

+X₄×(T₈-T₀)×λ₄

Obtain Q⁴, wherein X₁For drying grate surface area, X₂For rotary kiln surface product, X₃For ring cold machine surface area, X₄For pipeline Surface area, λ₁For drying grate coefficient of heat transfer, λ₂For rotary kiln coefficient of heat transfer, λ₃For ring cold machine coefficient of heat transfer, λ₄For heat dissipation of pipeline system Number, T₅For drying grate surface temperature, T₆For rotary kiln surface temperature, T₇For ring cold machine surface temperature, T₈For pipe temperature, T₀For ring Border air themperature；

The heat Q for obtaining finished pellet mine belt and walking⁵Include:

According to

Q⁵=G_Ball×C_Ball×T₉

Obtain Q⁵, wherein C_BallFor finished ball nodulizing avergae specific heat, G_BallFor finished ball pellet quality, T₉For finished ball after cooling The temperature of nodulizing；

The acquisition, which is leaked out, radiates and the heat Q of loss⁶Include:

According to

Q⁶=L × C₉×T₁₀×V₅

Obtain Q⁶, wherein L is drying grate air leak rate of air curtain, C₉For the exhaust gas specific heat that leaks out, T₁₀For exhaust gas temperature, V₅It is logical for drying grate Cross air quantity.

The technical solution that the embodiment of the present invention provides can include the following benefits:

In the prior art, it only considered raw materials for production condition, do not fully consider environmental factor, production process parameters Influence to firing rate, thus can not the consumption to fuel be more accurately controlled.And the present invention is fully considering ball In the case where group's raw material parameter, the initial ratio of pelletizing fuel is calculated, then production process parameters, environmental parameter are supervised Control is fired according to the pelletizing of pelletizing production process materials balance and heat Balance Calculation under the premise of guaranteeing finished pellet mineral figureofmerit Expect dosage, burnup is more accurately controlled according to the result of recursive calculation, so that reaching reduces cost, energy conservation and environmental protection Effect.

It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not It can the limitation present invention.

Detailed description of the invention

The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention Example, and be used to explain the principle of the present invention together with specification.

Fig. 1 is a kind of process of grate-kiln pelletizing burnup control method shown according to an exemplary embodiment Figure；

Fig. 2 is the equipment schematic diagram of Grate-kiln Oxidized Pellet technique；

Fig. 3 is a kind of process of grate-kiln pelletizing burnup control method shown according to an exemplary embodiment Figure；

Fig. 4 is a kind of signal of grate-kiln pelletizing burn-up control assembly shown according to an exemplary embodiment Figure；

Fig. 5 is a kind of signal of grate-kiln pelletizing burn-up control assembly shown according to an exemplary embodiment Figure.

Specific embodiment

Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended The example of device and method being described in detail in claims, some aspects of the invention are consistent.

Fig. 1 is a kind of process of grate-kiln pelletizing burnup control method shown according to an exemplary embodiment Figure.This method is used for the process of grate kiln method production iron ore acid pellet, reference can be made to shown in Fig. 2, Fig. 2 For the equipment schematic diagram of Grate-kiln Oxidized Pellet technique, material from left to right successively can be by drying grate 201, revolution Kiln 202, ring cold machine 203.

Shown in Figure 1, this method may include steps of:

Step S101 obtains the estimated value G of fuel needed for pelletizing burns₁。

Material into rotary kiln mainly includes green-ball.Green-ball can be added water refuelling to be made by dry mixture.Fuel can Think anthracite, fuel may be coal gas etc. in the case of other, and the present embodiment is simultaneously not limited.Dry mixture is usual It may include mixing concentrate, bentonite, dedusting ash etc..It mixes concentrate and refers to that various concentrate proportionally require the essence after mixing Mine.

For a certain amount of dry mixture, can by rule of thumb or other modes to fuel required for these dry mixtures into Row estimation.

It should be noted that quality and weight is often used in fact in this field, such as G₁Etc. parameters, also all may be used in fact To take unit of weight, those skilled in the art are according to circumstances carried out multiplied by g or divided by the processing of g at this time.

As an example, the estimated value G for obtaining fuel needed for pelletizing burns₁, may include:

Material data is obtained, the material data includes the accounting of material ingredient and each ingredient；

Following table 1~4 gives some examples of material data:

Table 1

Table 2

Table 3

Table 4

According to the material data and input and output material balance formula, the estimated value of fuel needed for pelletizing burns is obtained G₁。

Table 5 is an example of material balance:

Table 5

According to material balance between revenue and expenditure, it is estimated that the fuel expended required for the dry mixture of certain mass.

Step S102, according to the estimated value G of required fuel₁, pelletizing burning when technique and environmental conditions parameter, thermal balance Formula obtains the Actual combustion heat release value Q of fuel₇。

As an example, according to the estimated value G of required fuel₁, pelletizing burning when technique and environmental conditions parameter, thermal balance Formula obtains the Actual combustion heat release value Q of fuel₇, may include:

According to G₁, pelletizing burning when technique and environmental conditions parameter, respectively obtain: the heat Q that green-ball is brought into₁, green-ball water Divide the heat Q brought into₂, gas for ignition burning release heat Q₃, FeO oxidation release heat Q₄, the heat Q that brings into of air₅、 Fuel physical heat release Q₆, and, exhaust heat Q¹, the heat Q that takes away of water evaporation², the heat taken away of spreading and dedusting ash Q³, body heat dissipation and lose heat Q⁴, the heat Q that walks of finished pellet mine belt⁵, leak out heat dissipation and lose heat Q⁶；

According to heat balance equation

Q₁+Q₂+Q₃+Q₄+Q₅+Q₆+Q₇=Q¹+Q²+Q³+Q⁴+Q⁵+Q⁶

Obtain the Actual combustion heat release value Q of fuel₇。

Step S103, according to the Actual combustion heat release value Q of the fuel₇, obtain the actual consumption value G of fuel₂。

The Actual combustion heat release value Q of fuel is calculated by heat balance equation₇Afterwards, then pass through

Q₇=q × G₂

It counter can release the actual consumption value G of fuel₂Namely quality of fuel consumed by reality, wherein q in above formula For the fuel low heat value (such as unit can be KJ/t) of unit quality.

Such as

Q=(79.8 × C+246 × H-26 × (O-S) -6 × W) × 4.18

C, H, O, S are respectively content/% of carbon in fuel, hydrogen, oxygen, element sulphur, and W is fuel free moisture/%.

Step S104, judges G₂With G₁It is whether equal.

Step S105, if unequal, by G₂It is assigned to G₁, and step S102~S105 is repeated, until G₂With G₁Phase Deng.

It should be noted that in the ideal case, fuel is fully utilized, without extra and waste, so G₂With G₁It should It is equal, and in actual production, it is described equal not necessarily absolutely equal, but can for example show as after being accurate to decimal point 1 equal or the difference between the two can be regarded as equal in pre-set interval.

When the two is unequal, then it is iterated calculating, by G₂It is assigned to G₁To obtain new G₁, then calculate newly G₂, then both carry out whether equal judgement, so recycle, until G₂With G₁It is equal.

The cyclic process can be found in shown in Fig. 3 as example, and fuel needed for obtaining for the first time first in step S301 is estimated Evaluation G₁, then in step s 302 according to G₁, pelletizing burning when technique and environmental conditions parameter, heat balance equation, obtain combustion The actual consumption value G of material₂, G is judged in step S303₂With G₁It is whether equal, enable G in step s 304 if unequal₁= G₂, S302 is then returned, follow-up process is entered if equal.

It also should be noted that in some special cases, it is also possible to it will appear and recycle the case where not restraining, i.e., two Person is unequal always or even difference is increasing.It needs to check reason at this time, such as checks whether initial value is wrong etc..

Step S106, according to G₂Fuel is controlled.

The more accurate value of fuel needed for just having obtained the dry mixture of certain mass by the above step, according to This value carries out burden control to fuel, can be to avoid the waste of fuel, energy conservation and environmental protection.

In this embodiment or some other embodiment of the present invention, the heat Q for obtaining green-ball and bringing into₁Include:

According to

Q₁=C_{It is mixed}×G_{It is mixed}×T₁

Obtain Q₁, wherein C_{It is mixed}For dry mixture specific heat, unit K J/ (kg. DEG C), G_{It is mixed}For dry mixture quality, units/kg, T₁ For green-ball temperature, 25 DEG C can be taken.

Wherein

C_{It is mixed}=(Σ_Bentonite(C_{Bentonite ingredient i}×λ_{Bentonite ingredient i})×0.01+Σ_{Mix concentrate}(C_{Mix concentrate ingredient j}×λ_{Mix concentrate ingredient j})×0.99)× 0.9

+Σ_{Dedusting ash}(C_{Dedusting ash component k}×λ_{Dedusting ash component k})×0.1

C_{Bentonite ingredient i}For the specific heat KJ/ (kg. DEG C) of ingredient each in bentonite, amount to i kind ingredient；

λ_{Bentonite ingredient i}For the accounting % of ingredient each in bentonite；

C_{Mix concentrate ingredient j}For the specific heat KJ/ (kg. DEG C) for mixing each ingredient in concentrate, amount to j kind ingredient；

λ_{Mix concentrate ingredient j}For the accounting % for mixing each ingredient in concentrate；

C_{Dedusting ash component k}For the specific heat KJ/ (kg. DEG C) of ingredient each in dedusting ash, amount to k kind ingredient；

λ_{Dedusting ash component k}For the accounting % of ingredient each in dedusting ash.

The heat Q for obtaining green-ball moisture and bringing into₂Include:

According to

Q₂=C₂×G_Water×T₁

Obtain Q₂, wherein C₂For the specific heat of moisture, unit K J/ (kg. DEG C), G_WaterFor the quality of moisture in green-ball, units/kg, T₁For green-ball temperature, unit DEG C.

The heat Q for obtaining gas for ignition burning and releasing₃Include:

According to

Q₃=q₁×V_{Coal gas}

Obtain Q₃, wherein q₁For coal gas low heat value, unit can be J/m³, V_{Coal gas}For gas consumption in ignition amount, unit It can be m³,

q₁=59.846 × C_mH_n+10.797×H₂+35.832×CH₄+12.697×CO

C in formula_mH_n、H₂、CO、CH₄Content/% of unsaturated hydrocarbons, hydrogen, carbon monoxide, methane respectively in coal gas.

The heat Q for obtaining FeO oxidation and releasing₄Include:

According to

Q₄=C_FeO×(H₁×G_Essence-H₀×G_Ball)

Obtain Q₄, wherein C_FeOFor unit quality FeO oxidation heat liberation amount, unit can be KJ/kg, H₁To mix in concentrate The content (%) of FeO, H₀For the content (%) of FeO in finished ball nodulizing, G_EssenceTo mix concentrate quality, unit can be kg, G_Ball For finished ball pellet quality, unit can be kg.

The heat Q for obtaining air and bringing into₅Include:

According to

Q₅=T₀×C₃×V₁

Obtain Q₅, wherein T₀For air themperature, 25 DEG C of room temperature can be taken, C₃For air at room temperature specific heat, unit can be KJ/ (kg. DEG C), V₁For total blast volume, unit can be m³。

The acquisition fuel physical heat release Q₆Include:

According to

Q₆=C₄×G₁×T_Combustion

Obtain Q₆, wherein C₄For fuel (such as anthracite) specific heat, unit can be KJ/ (kg. DEG C), T_CombustionIt is fuel in room temperature Under temperature,

C₄=Σ_Anthracite(C_{Anthracite ingredient i}×λ_{Anthracite ingredient i})

In formula, C_{Anthracite ingredient i}For the specific heat of ingredient each in anthracite, unit can be KJ/ (kg. DEG C), share i kind ingredient；

λ_{Anthracite ingredient i}For ratio/% of ingredient each in anthracite.

In this embodiment or some other embodiment of the present invention, the acquisition exhaust heat Q¹Include:

According to

Q¹=C₅×V₂×T₂+C₆×V₃×T₃+C_{In advance}×V₄×T_{In advance}

Obtain Q¹, wherein C₅For blasting drying period exhaust gas specific heat, V₂For blasting drying period exhausted air quantity, T₂For blasting drying period Air themperature, C₆For down-draft drying zone exhaust gas specific heat, V₃For down-draft drying zone exhausted air quantity, V₄For I sections (TPH sections of preheating；TPH, Tempered preheating, transition preheating) exhausted air quantity, T₃For I sections of (TPH sections) exhaust gas temperature of exhausting drying and preheating, C_{In advance}For Preheat I sections of (TPH sections) exhaust gas specific heats, T_{In advance}To preheat I sections of (TPH sections) exhaust gas temperature, wherein all can be KJ/ (kg. than heat unit DEG C), temperature unit is DEG C that tolerance unit all can be m³。

The heat Q for obtaining water evaporation and taking away²Include:

According to

Q²=J₁×G_Water

Obtain Q², wherein J₁Heat required for water evaporation for unit quality, unit can be KJ/kg, can be according to water Temperature tables look-up to obtain, G_WaterFor the quality of moisture in green-ball, unit can be kg.

The heat Q that the acquisition spreading and dedusting ash are taken away³Include:

According to

Q³=C₇×T₄×(G_{It spreads}+G_Dirt)

Obtain Q³, wherein C₇For spreading and dedusting ash specific heat, unit can be KJ/ (kg. DEG C), T₄For returning charge mean temperature, Unit DEG C, G_{It spreads}For spreading amount, G_DirtFor dedusting ash quantity, unit all can be kg；

The heat Q for obtaining body heat dissipation and losing⁴Include:

According to

Q⁴=X₁×(T₅-T₀)×λ₁+X₂×(T₆-T₀)×λ₂+X₃×(T₇-T₀)×λ₃

+X₄×(T₈-T₀)×λ₄

Obtain Q⁴, wherein X₁For drying grate surface area, X₂For rotary kiln surface product, X₃For ring cold machine surface area, X₄For pipeline Surface area, λ₁For drying grate coefficient of heat transfer, λ₂For rotary kiln coefficient of heat transfer, λ₃For ring cold machine coefficient of heat transfer, λ₄For heat dissipation of pipeline system Number, T₅For drying grate surface temperature, T₆For rotary kiln surface temperature, T₇For ring cold machine surface temperature, T₈For pipe temperature, T₀For ring Border air themperature, wherein square measure all can be m², temperature unit is DEG C.

The heat Q for obtaining finished pellet mine belt and walking⁵Include:

According to

Q⁵=G_Ball×C_Ball×T₉

Obtain Q⁵, wherein C_BallFor finished ball nodulizing avergae specific heat, unit can be KJ/ (kg. DEG C), G_BallFor finished ball nodulizing Quality, unit can be kg, T₉For the temperature of finished ball nodulizing after cooling, unit DEG C,

C_Ball=Σ_{Finished pellet}(C_{Pelletizing ingredient}×λ_{Pelletizing ingredient})

Wherein, C_{Pelletizing ingredient}For the specific heat of each ingredient in finished ball nodulizing, unit can be KJ/ (kg. DEG C), λ_{Pelletizing ingredient}For finished product Ratio/% of each ingredient in pellet.

The acquisition, which is leaked out, radiates and the heat Q of loss⁶Include:

According to

Q⁶=L × C₉×T₁₀×V₅

Obtain Q⁶, wherein L is drying grate air leak rate of air curtain, C₉For the exhaust gas specific heat that leaks out, unit can be KJ/ (kg. DEG C), T₁₀For Exhaust gas temperature, unit DEG C, V₅It is drying grate by air quantity, unit can be m³。

It also should be noted that the unit of each Parameters in Formula of the present invention may be not unique, such as the list of heat Position can may be KJ for J, and the unit of quality can may be kg for t, and Speed unit can be r/min (rev/min) May be r/s (revolutions per second), so these formula given above may also not only have a kind of form, those skilled in the art Member can according to the actual situation to being converted in the above formula, such as multiplied by 1000 t is scaled kg, divided by 60 with R/min is scaled r/s, multiplied by g mass conversion as weight, etc., to this present embodiment and to be not limited.

Following is apparatus of the present invention embodiment, can be used for executing embodiment of the present invention method.For apparatus of the present invention reality Undisclosed details in example is applied, embodiment of the present invention method is please referred to.

Fig. 4 is a kind of signal of grate-kiln pelletizing burn-up control assembly shown according to an exemplary embodiment Figure, the apparatus may include:

Fuel initial setup module 401, for obtaining the estimated value G of fuel needed for pelletizing burns₁；

Fuel calculation module 402, for the estimated value G according to required fuel₁, pelletizing burning when technique and environmental condition Parameter, heat balance equation obtain the Actual combustion heat release value Q of fuel₇；According to the Actual combustion heat release value Q of the fuel₇, obtain The actual consumption value G of fuel₂；Judge G₂With G₁It is whether equal；If unequal, by G₂It is assigned to G₁, and recalculate G₂, directly To G₂With G₁It is equal；

Fuel control module 403, for according to G₂Fuel is controlled.

Shown in Figure 5, in this embodiment or some other embodiment of the present invention, the fuel initial setup module can To include:

Material data acquisition submodule 501, for obtaining material data, the material data include material ingredient and The accounting of each ingredient；

Fuel initial estimate acquisition submodule 502, for public according to the material data and input and output material balance Formula obtains the estimated value G of fuel needed for pelletizing burns₁。

In this embodiment or some other embodiment of the present invention, the fuel calculation module is in estimating according to required fuel Evaluation G₁, pelletizing burning when technique and environmental conditions parameter, heat balance equation, obtain the Actual combustion heat release value Q of fuel₇When, For:

According to G₁, pelletizing burning when technique and environmental conditions parameter, respectively obtain: the heat Q that green-ball is brought into₁, green-ball water Divide the heat Q brought into₂, gas for ignition burning release heat Q₃, FeO oxidation release heat Q₄, the heat Q that brings into of air₅、 Fuel physical heat release Q₆, and, exhaust heat Q¹, the heat Q that takes away of water evaporation², the heat taken away of spreading and dedusting ash Q³, body heat dissipation and lose heat Q⁴, the heat Q that walks of finished pellet mine belt⁵, leak out heat dissipation and lose heat Q⁶；

According to heat balance equation

Q₁+Q₂+Q₃+Q₄+Q₅+Q₆+Q₇=Q¹+Q²+Q³+Q⁴+Q⁵+Q⁶

Obtain the Actual combustion heat release value Q of fuel₇。

In this embodiment or some other embodiment of the present invention, the heat Q for obtaining green-ball and bringing into₁Include:

According to

Q₁=C_{It is mixed}×G_{It is mixed}×T₁

Obtain Q₁, wherein C_{It is mixed}For dry mixture specific heat, G_{It is mixed}For dry mixture quality, T₁For green-ball temperature；

The heat Q for obtaining green-ball moisture and bringing into₂Include:

According to

Q₂=C₂×G_Water×T₁

Obtain Q₂, wherein C₂For the specific heat of moisture, G_WaterFor the quality of moisture in green-ball, T₁For green-ball temperature；

The heat Q for obtaining gas for ignition burning and releasing₃Include:

According to

Q₃=q₁×V_{Coal gas}

Obtain Q₃, wherein q₁For coal gas low heat value, V_{Coal gas}For gas consumption in ignition amount；

The heat Q for obtaining FeO oxidation and releasing₄Include:

According to

Q₄=C_FeO×(H₁×G_Essence-H₀×G_Ball)

Obtain Q₄, wherein C_FeOFor unit quality FeO oxidation heat liberation amount, H₁For the content for mixing FeO in concentrate, H₀For finished product The content of FeO, G in pellet_EssenceTo mix concentrate quality, G_BallFor finished ball pellet quality；

The heat Q for obtaining air and bringing into₅Include:

According to

Q₅=T₀×C₃×V₁

Obtain Q₅, wherein T₀For air themperature, C₃For air at room temperature specific heat, V₁For total blast volume；

The acquisition fuel physical heat release Q₆Include:

According to

Q₆=C₄×G₁×T_Combustion

Obtain Q₆, wherein C₄For the entalpy of fuel, T_CombustionFor the temperature of fuel at normal temperature.

In this embodiment or some other embodiment of the present invention, the acquisition exhaust heat Q¹Include:

According to

Q¹=C₅×V₂×T₂+C₆×V₃×T₃+C_{In advance}×V₄×T_{In advance}

Obtain Q¹, wherein C₅For blasting drying period exhaust gas specific heat, V₂For blasting drying period exhausted air quantity, T₂For blasting drying period Air themperature, C₆For down-draft drying zone exhaust gas specific heat, V₃For down-draft drying zone exhausted air quantity, V₄To preheat I sections of exhausted air quantities, T₃To take out Air-dry dry and I sections of exhaust gas temperature of preheating, C_{In advance}To preheat I sections of exhaust gas specific heats, T_{In advance}To preheat I sections of exhaust gas temperature；

The heat Q for obtaining water evaporation and taking away²Include:

According to

Q²=J₁×G_Water

Obtain Q², wherein J₁Heat required for water evaporation for unit quality, G_WaterFor the quality of moisture in green-ball；

The heat Q that the acquisition spreading and dedusting ash are taken away³Include:

According to

Q³=C₇×T₄×(G_{It spreads}+G_Dirt)

Obtain Q³, wherein C₇For spreading and dedusting ash specific heat, T₄For returning charge mean temperature, G_{It spreads}For spreading amount, G_DirtFor dedusting ash Amount；

The heat Q for obtaining body heat dissipation and losing⁴Include:

According to

Q⁴=X₁×(T₅-T₀)×λ₁+X₂×(T₆-T₀)×λ₂+X₃×(T₇-T₀)×λ₃

+X₄×(T₈-T₀)×λ₄

Obtain Q⁴, wherein X₁For drying grate surface area, X₂For rotary kiln surface product, X₃For ring cold machine surface area, X₄For pipeline Surface area, λ₁For drying grate coefficient of heat transfer, λ₂For rotary kiln coefficient of heat transfer, λ₃For ring cold machine coefficient of heat transfer, λ₄For heat dissipation of pipeline system Number, T₅For drying grate surface temperature, T₆For rotary kiln surface temperature, T₇For ring cold machine surface temperature, T₈For pipe temperature, T₀For ring Border air themperature；

The heat Q for obtaining finished pellet mine belt and walking⁵Include:

According to

Q⁵=G_Ball×C_Ball×T₉

Obtain Q⁵, wherein C_BallFor finished ball nodulizing avergae specific heat, G_BallFor finished ball pellet quality, T₉For finished ball after cooling The temperature of nodulizing；

The acquisition, which is leaked out, radiates and the heat Q of loss⁶Include:

According to

Q⁶=L × C₉×T₁₀×V₅

Obtain Q⁶, wherein L is drying grate air leak rate of air curtain, C₉For the exhaust gas specific heat that leaks out, T₁₀For exhaust gas temperature, V₅It is logical for drying grate Cross air quantity.

About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method Embodiment in be described in detail, no detailed explanation will be given here.

Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended Claim is pointed out.

It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.

Claims (10)

1. a kind of grate-kiln pelletizing burnup control method, which is characterized in that the described method includes:

I) the estimated value G of fuel needed for pelletizing burns is obtained₁；

Ii) according to the estimated value G of required fuel₁, pelletizing burning when technique and environmental conditions parameter, heat balance equation, obtain combustion The Actual combustion heat release value Q of material₇；

Iii) according to the Actual combustion heat release value Q of the fuel₇With the fuel low heat value q of unit mass, according to formula Q₇=q ×G₂Obtain the actual consumption value G of fuel₂；

Iv) judge G₂With G₁It is whether equal；

If v) unequal, by G₂It is assigned to G₁, and repeat step ii)~v), until G₂With G₁It is equal；

Vi) according to G₂Fuel is controlled.

2. the method according to claim 1, wherein obtaining the estimated value G of fuel needed for pelletizing burns₁, comprising:

Material data is obtained, the material data includes the accounting of material ingredient and each ingredient；

According to the material data and input and output material balance formula, the estimated value G of fuel needed for pelletizing burns is obtained₁。

3. the method according to claim 1, wherein according to the estimated value G of required fuel₁, pelletizing burning when work Skill and environmental conditions parameter, heat balance equation obtain the Actual combustion heat release value Q of fuel₇, comprising:

According to G₁, pelletizing burning when technique and environmental conditions parameter, respectively obtain: the heat Q that green-ball is brought into₁, green-ball moisture band The heat Q entered₂, gas for ignition burning release heat Q₃, FeO oxidation release heat Q₄, the heat Q that brings into of air₅, fuel Physics heat release Q₆, and, exhaust heat Q¹, the heat Q that takes away of water evaporation², the heat Q that takes away of spreading and dedusting ash³、 The heat Q of body heat dissipation and loss⁴, the heat Q that walks of finished pellet mine belt⁵, leak out heat dissipation and lose heat Q⁶；

According to heat balance equation

Q₁+Q₂+Q₃+Q₄+Q₅+Q₆+Q₇=Q¹+Q²+Q³+Q⁴+Q⁵+Q⁶

Obtain the Actual combustion heat release value Q of fuel₇。

4. according to the method described in claim 3, it is characterized in that, the heat Q for obtaining green-ball and bringing into₁Include:

According to

Q₁=C_{It is mixed}×G_{It is mixed}×T₁

Obtain Q₁, wherein C_{It is mixed}For dry mixture specific heat, G_{It is mixed}For dry mixture quality, T₁For green-ball temperature；

The heat Q for obtaining green-ball moisture and bringing into₂Include:

According to

Q₂=C₂×G_Water×T₁

Obtain Q₂, wherein C₂For the specific heat of moisture, G_WaterFor the quality of moisture in green-ball, T₁For green-ball temperature；

The heat Q for obtaining gas for ignition burning and releasing₃Include:

According to

Q₃=q₁×V_{Coal gas}

Obtain Q₃, wherein q₁For coal gas low heat value, V_{Coal gas}For gas consumption in ignition amount；

The heat Q for obtaining FeO oxidation and releasing₄Include:

According to

Q₄=C_FeO×(H₁×G_Essence-H₀×G_Ball)

Obtain Q₄, wherein C_FeOFor unit quality FeO oxidation heat liberation amount, H₁For the content for mixing FeO in concentrate, H₀For finished pellet The content of FeO, G in mine_EssenceTo mix concentrate quality, G_BallFor finished ball pellet quality；

The heat Q for obtaining air and bringing into₅Include:

According to

Q₅=T₀×C₃×V₁

Obtain Q₅, wherein T₀For air themperature, C₃For air at room temperature specific heat, V₁For total blast volume；

The acquisition fuel physical heat release Q₆Include:

According to

Q₆=C₄×G₁×T_Combustion

Obtain Q₆, wherein C₄For the entalpy of fuel, T_CombustionFor the temperature of fuel at normal temperature.

5. according to the method described in claim 3, it is characterized in that, the acquisition exhaust heat Q¹Include:

According to

Q¹=C₅×V₂×T₂+C₆×V₃×T₃+C_{In advance}×V₄×T_{In advance}

Obtain Q¹, wherein C₅For blasting drying period exhaust gas specific heat, V₂For blasting drying period exhausted air quantity, T₂For blasting drying period Air Temperature Degree, C₆For down-draft drying zone exhaust gas specific heat, V₃For down-draft drying zone exhausted air quantity, V₄To preheat I sections of exhausted air quantities, T₃It is dry for exhausting With I sections of exhaust gas temperature of preheating, C_{In advance}To preheat I sections of exhaust gas specific heats, T_{In advance}To preheat I sections of exhaust gas temperature；

The heat Q for obtaining water evaporation and taking away²Include:

According to

Q²=J₁×G_Water

Obtain Q², wherein J₁Heat required for water evaporation for unit quality, G_WaterFor the quality of moisture in green-ball；

The heat Q that the acquisition spreading and dedusting ash are taken away³Include:

According to

Q³=C₇×T₄×(G_{It spreads}+G_Dirt)

Obtain Q³, wherein C₇For spreading and dedusting ash specific heat, T₄For returning charge mean temperature, G_{It spreads}For spreading amount, G_DirtFor dedusting ash quantity；

The heat Q for obtaining body heat dissipation and losing⁴Include:

According to

Q⁴=X₁×(T₅-T₀)×λ₁+X₂×(T₆-T₀)×λ₂+X₃×(T₇-T₀)×λ₃

+X₄×(T₈-T₀)×λ₄

Obtain Q⁴, wherein X₁For drying grate surface area, X₂For rotary kiln surface product, X₃For ring cold machine surface area, X₄For pipe surface Product, λ₁For drying grate coefficient of heat transfer, λ₂For rotary kiln coefficient of heat transfer, λ₃For ring cold machine coefficient of heat transfer, λ₄For heat dissipation of pipeline coefficient, T₅ For drying grate surface temperature, T₆For rotary kiln surface temperature, T₇For ring cold machine surface temperature, T₈For pipe temperature, T₀For environment sky Temperature degree；

The heat Q for obtaining finished pellet mine belt and walking⁵Include:

According to

Q⁵=G_Ball×C_Ball×T₉

Obtain Q⁵, wherein C_BallFor finished ball nodulizing avergae specific heat, G_BallFor finished ball pellet quality, T₉For finished ball nodulizing after cooling Temperature；

The acquisition, which is leaked out, radiates and the heat Q of loss⁶Include:

According to

Q⁶=L × C₉×T₁₀×V₅

Obtain Q⁶, wherein L is drying grate air leak rate of air curtain, C₉For the exhaust gas specific heat that leaks out, T₁₀For exhaust gas temperature, V₅Pass through wind for drying grate Amount.

6. a kind of grate-kiln pelletizing burn-up control assembly, which is characterized in that described device includes:

Fuel initial setup module, for obtaining the estimated value G of fuel needed for pelletizing burns₁；

Fuel calculation module, for the estimated value G according to required fuel₁, pelletizing burning when technique and environmental conditions parameter, heat Equation of equilibrium obtains the Actual combustion heat release value Q of fuel₇；According to the Actual combustion heat release value Q of the fuel₇With unit mass Fuel low heat value q, according to formula Q₇=q × G₂Obtain the actual consumption value G of fuel₂；Judge G₂With G₁It is whether equal；If no It is equal, then by G₂It is assigned to G₁, and recalculate G₂, until G₂With G₁It is equal；

Fuel control module, for according to G₂Fuel is controlled.

7. device according to claim 6, which is characterized in that the fuel initial setup module includes:

Material data acquisition submodule, for obtaining material data, the material data includes material ingredient and each ingredient Accounting；

Fuel initial estimate acquisition submodule, for obtaining according to the material data and input and output material balance formula The estimated value G of fuel needed for pelletizing burns₁。

8. device according to claim 6, which is characterized in that the fuel calculation module is in the estimation according to required fuel Value G₁, pelletizing burning when technique and environmental conditions parameter, heat balance equation, obtain the Actual combustion heat release value Q of fuel₇When, it uses In:

According to G₁, pelletizing burning when technique and environmental conditions parameter, respectively obtain: the heat Q that green-ball is brought into₁, green-ball moisture band The heat Q entered₂, gas for ignition burning release heat Q₃, FeO oxidation release heat Q₄, the heat Q that brings into of air₅, fuel Physics heat release Q₆, and, exhaust heat Q¹, the heat Q that takes away of water evaporation², the heat Q that takes away of spreading and dedusting ash³、 The heat Q of body heat dissipation and loss⁴, the heat Q that walks of finished pellet mine belt⁵, leak out heat dissipation and lose heat Q⁶；

According to heat balance equation

Q₁+Q₂+Q₃+Q₄+Q₅+Q₆+Q₇=Q¹+Q²+Q³+Q⁴+Q⁵+Q⁶

Obtain the Actual combustion heat release value Q of fuel₇。

9. device according to claim 8, which is characterized in that the heat Q for obtaining green-ball and bringing into₁Include:

According to

Q₁=C_{It is mixed}×G_{It is mixed}×T₁

Obtain Q₁, wherein C_{It is mixed}For dry mixture specific heat, G_{It is mixed}For dry mixture quality, T₁For green-ball temperature；

The heat Q for obtaining green-ball moisture and bringing into₂Include:

According to

Q₂=C₂×G_Water×T₁

Obtain Q₂, wherein C₂For the specific heat of moisture, G_WaterFor the quality of moisture in green-ball, T₁For green-ball temperature；

The heat Q for obtaining gas for ignition burning and releasing₃Include:

According to

Q₃=q₁×V_{Coal gas}

Obtain Q₃, wherein q₁For coal gas low heat value, V_{Coal gas}For gas consumption in ignition amount；

The heat Q for obtaining FeO oxidation and releasing₄Include:

According to

Q₄=C_FeO×(H₁×G_Essence-H₀×G_Ball)

Obtain Q₄, wherein C_FeOFor unit quality FeO oxidation heat liberation amount, H₁For the content for mixing FeO in concentrate, H₀For finished pellet The content of FeO, G in mine_EssenceTo mix concentrate quality, G_BallFor finished ball pellet quality；

The heat Q for obtaining air and bringing into₅Include:

According to

Q₅=T₀×C₃×V₁

Obtain Q₅, wherein T₀For air themperature, C₃For air at room temperature specific heat, V₁For total blast volume；

The acquisition fuel physical heat release Q₆Include:

According to

Q₆=C₄×G₁×T_Combustion

Obtain Q₆, wherein C₄For the entalpy of fuel, T_CombustionFor the temperature of fuel at normal temperature.

10. device according to claim 8, which is characterized in that the acquisition exhaust heat Q¹Include:

According to

Q¹=C₅×V₂×T₂+C₆×V₃×T₃+C_{In advance}×V₄×T_{In advance}

Obtain Q¹, wherein C₅For blasting drying period exhaust gas specific heat, V₂For blasting drying period exhausted air quantity, T₂For blasting drying period Air Temperature Degree, C₆For down-draft drying zone exhaust gas specific heat, V₃For down-draft drying zone exhausted air quantity, V₄To preheat I sections of exhausted air quantities, T₃It is dry for exhausting With I sections of exhaust gas temperature of preheating, C_{In advance}To preheat I sections of exhaust gas specific heats, T_{In advance}To preheat I sections of exhaust gas temperature；

The heat Q for obtaining water evaporation and taking away²Include:

According to

Q²=J₁×G_Water

Obtain Q², wherein J₁Heat required for water evaporation for unit quality, G_WaterFor the quality of moisture in green-ball；

The heat Q that the acquisition spreading and dedusting ash are taken away³Include:

According to

Q³=C₇×T₄×(G_{It spreads}+G_Dirt)

Obtain Q³, wherein C₇For spreading and dedusting ash specific heat, T₄For returning charge mean temperature, G_{It spreads}For spreading amount, G_DirtFor dedusting ash quantity；

The heat Q for obtaining body heat dissipation and losing⁴Include:

According to

Q⁴=X₁×(T₅-T₀)×λ₁+X₂×(T₆-T₀)×λ₂+X₃×(T₇-T₀)×λ₃

+X₄×(T₈-T₀)×λ₄

Obtain Q⁴, wherein X₁For drying grate surface area, X₂For rotary kiln surface product, X₃For ring cold machine surface area, X₄For pipe surface Product, λ₁For drying grate coefficient of heat transfer, λ₂For rotary kiln coefficient of heat transfer, λ₃For ring cold machine coefficient of heat transfer, λ₄For heat dissipation of pipeline coefficient, T₅ For drying grate surface temperature, T₆For rotary kiln surface temperature, T₇For ring cold machine surface temperature, T₈For pipe temperature, T₀For environment sky Temperature degree；

The heat Q for obtaining finished pellet mine belt and walking⁵Include:

According to

Q⁵=G_Ball×C_Ball×T₉

Obtain Q⁵, wherein C_BallFor finished ball nodulizing avergae specific heat, G_BallFor finished ball pellet quality, T₉For finished ball nodulizing after cooling Temperature；

The acquisition, which is leaked out, radiates and the heat Q of loss⁶Include:

According to

Q⁶=L × C₉×T₁₀×V₅

Obtain Q⁶, wherein L is drying grate air leak rate of air curtain, C₉For the exhaust gas specific heat that leaks out, T₁₀For exhaust gas temperature, V₅Pass through wind for drying grate Amount.