CN1392222A - Method for coal blending coking by using coal petrography analysis - Google Patents

Abstract

The coal petrography analysis method for coal blending in coking includes blending single variety of coal with inert matter for simulated coking to obtain its strength index in different inert matter content and optimal activity-to-inertia ratio, and calculating its strength index and composition balancing index and drawing iso-strength curve. During application, the active component content in different single variety of coal are measured and the strength index and composition balancing index are calculated to calculate the strength of the coke. The said analysis method is simplified one of Amosov-Schpillow method and is rather simple in calcualting coke strength and direction coal blending.

Description

Utilize the coal petrography analysis to carry out the method for coal-blending coking

Technical field

The present invention relates to a kind of blending method of coking, particularly relate to a kind of method of coal petrography coal-blending coking.

Background technology

Is a great achievement that promotes the coking industry development from single coal coking of planting to multiple coal cooperation coking.Modern coke oven nearly all adopts multiple coking coal to cooperate coking, and usually, the supply of material producer of coal chemical enterprise coking coal is number man at least, tens of at most families, the coal source is unfixing, comes the ature of coal amount unstable thereupon yet, increase the blindness of coal-blending coking, had a strong impact on coke quality.In addition, the order that the price of coking coal is pressed coking coal, thin coking coal, strong rich coal, 1/3 coking coal reduces, and the consumption of coking coal accounts for about 50% of total consumption, if can reduce the consumption of coking coal, can reduce the cost of coke effectively.Yet the coal blending technology of domestic present employing is experience coal blending qualitatively basically, wants coming under the unsettled situation of ature of coal amount, guarantees the accuracy of coal blending, is very difficult by the experience coal blending; In like manner, under the prerequisite that guarantees coke quality, the consumption that reduces coking coal also is very difficult by the experience coal blending in the hope of reducing cost equally.

Overseas utilization coal petrography analytical procedure is carried out coal-blending coking, has obtained good coal blending effect.Wherein more typical coal petrography blending method is A Mosuofu and Shi Piluofa.

A Mosuofu and Shi Piluofa form and the activeconstituents reflectivity is a base mateiral with coal petrography, and macerals is divided into two big classes:

Active ingredient=vitrinite+chitin group+1/3 half vitrinites

Inert component=silk quality group+2/3 half vitrinites+mineral group

With the active ingredient in the coal (mainly being vitrinite), for being spaced apart out, be divided into 18 classes from 0.3%～2.1% by average maximum reflectivity 0.1%, indicate the metamorphic grade of coal with this.

Every class active ingredient all is equipped with the inert material of inequality, simulates industrial coking, draw such active ingredient intensity index a when different inert thing content _iChange curve, and regression curve equation a _i=f (y _{Inert material}), actual measurement draws such active ingredient and the best of inert material lazy b of ratio alive _i

The character of mixed coal can characterize with intensity index SI and Compositional balance index CBI.

The average quality of intensity index SI sign active ingredient, calculate by following formula: $\mathrm{SI}=\frac{a_3{x}_3+a_4{x}_4+a_5{x}_5+\·\·\·\·\·\·+a_{21}{x}_{21}}{{\mathrm{\Σx}}_i}$

In the formula:

x ₃～x ₂₁Be the content of the active ingredient of reflectivity 0.3%～2.1%;

a ₃～a ₂₁It is the active ingredient of reflectivity 0.3%～2.1% intensity index when containing a certain amount of inert component;

∑ x _iIt is the total content of active ingredient.

Compositional balance index CBI is the whether suitable index of inert component content in the sign coal blending, is calculated as follows: $\mathrm{CBI}=\frac{100-{\mathrm{\Σx}}_i}{\frac{x_3}{b_3}+\frac{x_4}{b_4}+\frac{x_5}{b_5}+\·\·\·\·\·\·+\frac{x_{21}}{b_{21}}}$

In the formula:

b ₃～b ₂₁It is the optimum ratio that the active ingredient of reflectivity 0.3%～2.1% cooperates with inert material;

x _iBe contained active component content in single kind coal or the coal blending;

100-∑ x _iActual content for inert component.

In the following formula, denominator is the desired contents of inert component.Therefore, when CBI=1, the content of inert component is optimum in the coal blending, and CBI is too high greater than 1 o'clock inert component content, otherwise low excessively.

With intensity index SI and Compositional balance index CBI is that coordinate is made iso-intensity curve figure, during application, as long as recording the coal petrography of coal blending forms and the reflectivity distribution plan, just can calculate the value of SI and CBI, on iso-intensity curve figure, find the point that meets these two indexs, can infer the intensity that coke.

From aforesaid method as can be seen, use A Mosuofu and Shi Piluofa and carry out coal petrography coal blending prediction coke quality, must be at first the vitrinite in the coal blending be spaced apart out by average maximum reflectivity 0.1%, and this work will consume a large amount of financial resources and material resources, be that general enterprise is difficult to bear, therefore, this method still fails to be able to wide popularization and application in China so far.

Technology contents

The objective of the invention is on the basis of A Mosuofu and Shi Piluofa, a kind of simple and practical coal petrography coal-blending coking method is provided.

The present invention is that to plant that coal replaces with reflectivity 0.1% be all kinds of active ingredients at interval with single, and each coal that is about to participate in coal blending is equipped with the inert material of inequality, simulates industrial coking, draws this list kind coal intensity index a when different inert thing content _SingleChange curve, and regression curve equation a _Single=f (y _{Inert material}), actual measurement draws this list and plants coal and the best of inert material lazy b of ratio alive _Single, by each single a that plants coal _SingleAnd b _SingleCome computed strength index SI ' and Compositional balance index CBI '.

Intensity index SI ' is calculated by following formula:

In the formula:

x _SingleIt is each single coal activity components contents of planting;

a _SingleIt is each single coal intensity index when containing a certain amount of inert component of planting;

∑ x _SingleIt is single total content of planting the coal activity component.

Compositional balance index CBI ' is calculated as follows:

In the formula:

b _SingleIt is the optimum ratio that each single kind coal cooperates with inert material;

x _SingleBe each contained in the coal blending single coal activity components contents of planting;

100-∑ x _SingleActual content for inert material.

With intensity index SI ' and Compositional balance index CBI ' is coordinate, simulates industrial coking, makes iso-intensity curve figure.During application,, just can calculate SI ' and CBI ' value, on iso-intensity curve figure, find the point that meets these two indexs, can infer the intensity that coke as long as record each single active component content of planting coal in the coal blending.

The inert material that the present invention allocates into is thin coking coal, rather than general hard coal, this be because: the first, concentrate in the thin coking coal place of production, ature of coal is more stable; The second, be that inert material is relatively more difficult to the quantitative assay of thin coking coal active ingredient with the hard coal, join thin coking coal and then can measure its active component content indirectly; The 3rd, use thin coking coal and can reduce the test furnace number as inert material, can reach set objective with less expense, time.

If when the quality of thin coking coal is unstable, also can replace thin coking coal as inert material with hard coal.

Coal petrography coal-blending coking test method of the present invention is to simplify to get on the basis of A Mosuofu and Shi Piluofa, compare with A Mosuofu and Shi Piluofa, the inventive method need not can be saved great amount of manpower and material resources and financial resources with the active ingredient in the coal by being spaced apart of reflectivity 0.1% in the coal blending test process.

Use coal petrography coal-blending coking test method of the present invention, can infer the coke strenth that coal-blending coking easily, instruct coal blending, can reduce the blindness that coking is produced, have stronger practicality and specific aim with this.

Embodiment

Embodiment 1:

At first, should select to test used single coal of planting.The coking coal that this enterprise uses now has four classes, i.e. 1/3 coking coal, rich coal, coking coal and thin coking coal, and this test is listed 1/3 coking coal, rich coal, coking coal the range of choice of single kind coal in, and thin coking coal is as inert material.

Single coal of planting is tested:

Select 3 of 1/3 coking coal coal samples earlier according to the situation of coming coal, 2 of rich coal coal samples, 4 of coking coal coal samples, each coal sample are all done 2 parallel tests.Single thin coking coal that adds different ratios in the coal of planting selected adds 5 ratios, goes into to simulate coking by coke oven, does drum test, and during test, test conditionss such as the coal particle size of shove charge, moisture, ash, bulk density, charing rate are constant all the time.According to single micropetrological unit of planting coal and inert material, be converted into the active ingredient and the inert component content of determination object again, draw this list and plant coal intensity index a when different inert thing content _SingleChange curve, and regression curve equation a _Single=f (y _{Inert material}), actual measurement draws this list and plants coal and the best of inert material lazy b of ratio alive _Single

Preliminary selected single quantity of planting coal, simulation coking by coke oven stove number such as table 1:

The single coal simulation production coking by coke oven testing program of planting of table 1

Single coal of planting	The coal sample number	Parallel test (inferior)	Small coke oven test (stove)
				1/3 coking coal	????3	????2	????30
Rich coal	????2	????2	????20
				Coking coal	????4	????2	????40
Add up to			????90

The mixed coal test:

By each single a that plants coal _SingleAnd b _SingleCalculate the intensity index SI ' and the Compositional balance index CBI ' of mixed coal, simulate coking test then and measure coke strenth.According to the universal demand of user's STRENGTH ON COKE intensity, drafting M40 is 75,80,85,90 4 iso-intensity curves, and every curve is got 10 points, makes iso-intensity curve figure, estimates pit kiln number such as table 2.

The coking by coke oven testing program is produced in the simulation of table 2 mixed coal

The equal strength value	Curve is got and is counted	Parallel test (inferior)	The test furnace number
				????75	????10	????2	????20
????80	????10	????2	????20
				????85	????10	????2	????20
????90	????10	????2	????20
				Add up to			????80

Whole test need be made 350 stoves and can finish, and obtains iso-intensity curve figure.

When using, as long as determine each single active component content of planting coal in the coal blending, just can calculate SI ' and CBI ' value, on iso-intensity curve figure, find the point that meets these two indexs, can infer the intensity that coke is produced in this coal blending.

Claims (3)

1, utilize the coal petrography analysis to carry out the method for coal-blending coking, it is characterized in that: each single kind coal that will participate in coal blending is equipped with the inert material of inequality, simulates industrial coking, draws this list and plants coal intensity index a when different inert thing content _SingleChange curve, and regression curve equation a _Single=f (y _{Inert material}), actual measurement draws this list and plants coal and the best of inert material lazy b of ratio alive _Single, by each single a that plants coal _SingleAnd b _SingleCome computed strength index SI ' and Compositional balance index CBI ':

Intensity index SI ' is calculated by following formula:

In the formula:

x _SingleIt is each single coal activity components contents of planting;

a _SingleIt is each single coal intensity index when containing a certain amount of inert component of planting;

∑ x _SingleIt is single total content of planting the coal activity component;

Compositional balance index CBI ' is calculated as follows:

In the formula:

b _SingleIt is the optimum ratio that each single kind coal cooperates with inert material;

x _SingleBe each contained in the coal blending single coal activity components contents of planting;

100-∑ x _SingleActual content for inert material;

With intensity index SI ' and Compositional balance index CBI ' is that coordinate is made iso-intensity curve.

2, the method for utilizing the coal petrography analysis to carry out coal-blending coking according to claim 1 is characterized in that the inert material of allocating into is thin coking coal.

3, the method for utilizing the coal petrography analysis to carry out coal-blending coking according to claim 1, it is characterized in that recording each single active component content of planting coal in the coal blending, calculate SI ' and CBI ', on iso-intensity curve figure, find the point that meets these two indexs, can infer the intensity that coke.