CN104698147A - Quantitative evaluation method for coking coal cost performance - Google Patents

Abstract

The invention provides a quantitative evaluation method for a coking coal cost performance. The method comprises the following steps: calculating a performance value of coking coal according to a formula P1=SCV+CCV; calculating the cost performance of the coking coal according to a formula C=P1/P2, wherein P1 is the performance value of the coking coal, the SCV is a first contribution value of a coke intensity index, the CCV is a second contribution value of the coke intensity index, C is the cost performance of the coking coal and P2 is the price of the coking coal; quantitatively evaluating the performance of the coke according to influence on the operation of a blast furnace on indexes of the coking coal generating coke so as to further quantitatively evaluate the corresponding coking coal performance; and finally combining the price of the coking coal to obtain the cost performance of the coking coal so as to objectively and accurately evaluate a coking coal source.

Description

A kind of coking coal cost performance method for quantitatively evaluating

Technical field

The invention belongs to coal tar technical field, particularly relate to a kind of coking coal cost performance method for quantitatively evaluating.

Background technology

Coal is that one forms, structure is very complicated and extremely inhomogenous potpourri, screen the coking coal resource of high performance-price ratio, except relying on the experience of long term accumulation, also need quantitative evaluation and the screening technique of setting up high performance-price ratio coking coal resource, with the process making the screening of coking coal resource become workable.

And always represent with certain numerical value (amount of money) due to coking coal price, therefore, solving key that coking coal resource cost performance calculates is quantitative evaluation to coking coal performance.

For the performance of the various coking coal resource of quantitative evaluation, the index of 14 coking coal resources is adopted in prior art, give the influence value that each coking coal index is certain, and this influence value is technician according to experience and feel to give, there is certain randomness, be difficult to quantitative measurement coking coal performance accurately.

Summary of the invention

For prior art Problems existing, embodiments provide a kind of coking coal cost performance method for quantitatively evaluating, for solving in prior art the technical matters being difficult to accurately weigh coking coal performance.

The invention provides a kind of coking coal cost performance method for quantitatively evaluating, described method comprises:

The performance number of described coking coal is calculated according to formula P1=SCV+CCV;

The cost performance of described coking coal is calculated according to formula C=P1/P2; Wherein,

Described P1 is the performance number of described coking coal; Described SCV is the first contribution margin of Indexes on Coke Strength; Described CCV is the second contribution margin of coke component target; Described C is the cost performance of described coking coal; Described P2 is the price of described coking coal.

In such scheme, described Indexes on Coke Strength comprises: breaking resistance M40, scuff resistance M10, reactive CRI, post-reaction strength CSR.

In such scheme, described coke component target comprises: coke ash Ad, sulfur content in coke Std.

In such scheme, described first contribution margin SCV is according to formula $\frac{\mathrm{CSR}-{\mathrm{CSR}}_0}{i1}\×K1\×\mathrm{FR}+\frac{\mathrm{CRI}-{\mathrm{CRI}}_0}{i2}\×K2\×\mathrm{FR}+\frac{M10-{M10}_0}{i3}\×K3\×\mathrm{FR}+\frac{M40-{M40}_0}{i4}\×K4\×\mathrm{FR}+a$ Obtain; Wherein,

Described CSR ₀for the reference value of post-reaction strength; Described i1 is the basis change unit of described CSR; Described FR is fuel ratio; Described K1 is when described CSR increases an i1, the first number percent of described FR change;

Described CRI ₀for reactive reference value; Described i2 is described CRI ₀basis change unit; Described K2 is when described CRI increases an i2, the second number percent of described FR change;

Described M10 ₀for the reference value of scuff resistance; Described i3 is the basis change unit of M10; Described K3 is when described M10 increases an i3, the 3rd number percent of described FR change;

Described M40 ₀for the reference value of breaking resistance; Described i4 is the basis change unit of M40; Described K4 is when described M40 increases an i4, the 4th number percent of described FR change;

Described a is the first correction coefficient.

In such scheme, described second contribution margin CCV is according to formula $\frac{\mathrm{Std}-{\mathrm{Std}}_0}{i5}*K5*\mathrm{FR}+\frac{\mathrm{Ad}-{\mathrm{Ad}}_0}{i6}*K6*\mathrm{FR}+b$ Obtain; Wherein,

Described Std ₀for the reference value of sulfur content in coke; Described FR is blast furnace fuel ratio; Described i5 is the basis change unit of Std; Described K5 is when described Std increases an i5, the 5th number percent of described FR change;

Described Ad ₀for the reference value of coke ash; Described i6 is the basis change unit of Ad; Described K6 is when described Ad increases an i6, the 5th number percent of described FR change;

Described b is the second correction coefficient.

The invention provides a kind of coking coal cost performance method for quantitatively evaluating, described method comprises: the performance number calculating described coking coal according to formula P1=SCV+CCV; The cost performance of described coking coal is calculated according to formula C=P1/P2; Wherein, described P1 is the performance number of described coking coal; Described SCV is the first contribution margin of Indexes on Coke Strength; Described CCV is the second contribution margin of coke component target; Described C is the cost performance of described coking coal; Described P2 is the price of described coking coal; So, generate the indices of coke to the impact of blast furnace operating with coking coal, carry out quantitative evaluation coke property, and then carry out the coking coal performance of its correspondence of quantitative evaluation, finally draw the cost performance of described coking coal in conjunction with coking coal price, coking coal resource can be evaluated objective and accurately.

Accompanying drawing explanation

The coking coal cost performance method for quantitatively evaluating schematic flow sheet that Fig. 1 provides for the embodiment of the present invention.

Embodiment

In order to be difficult to the technical matters accurately weighing coking coal performance in prior art, the invention provides a kind of coking coal cost performance method for quantitatively evaluating, described method comprises: the performance number calculating described coking coal according to formula P1=SCV+CCV; The cost performance of described coking coal is calculated according to formula C=P1/P2; Wherein, described P1 is the performance number of described coking coal; Described SCV is the first contribution margin of Indexes on Coke Strength; Described CCV is the second contribution margin of coke component target; Described C is the cost performance of described coking coal; Described P2 is the price of described coking coal.

Below by drawings and the specific embodiments, technical scheme of the present invention is described in further detail.

The present embodiment provides a kind of coking coal cost performance method for quantitatively evaluating, as shown in Figure 1, said method comprising the steps of:

Step 110, calculates the performance number of coking coal according to formula P1=SCV+CCV;

In this step, calculate the performance number of described coking coal according to formula (1); Here, the coke property value that performance number and the coking coal of described coking coal generate coke is identical, therefore can obtain described coking coal performance number by calculating described coke property value.

P1＝SCV+CCV (1)

Wherein, in formula (1), described P1 is the performance number of described coking coal; Described SCV is the first contribution margin of Indexes on Coke Strength; Described CCV is the second contribution margin of coke component target.Described first contribution margin SCV is intensity contribution value; Described second contribution margin CCV is components contribution value.

Particularly, described Indexes on Coke Strength comprises: breaking resistance M40, scuff resistance M10, reactive CRI, post-reaction strength CSR.Described first contribution margin SCV can calculate according to formula (2) and obtain.

$\begin{array}{c}\mathrm{SCV}=\frac{\mathrm{CSR}-{\mathrm{CSR}}_0}{i1}\×K1\×\mathrm{FR}+\frac{\mathrm{CRI}-{\mathrm{CRI}}_0}{i2}\×K2\×\mathrm{FR}+\frac{M10-{M10}_0}{i3}\×K3\×\mathrm{FR}\\ +\frac{M40-{M40}_0}{i4}\×K4\×\mathrm{FR}+a\end{array}---\left(2\right)$

Wherein, in formula (2), described CSR ₀for the reference value of post-reaction strength CSR; Described i1 is the basis change unit of described post-reaction strength CSR; Described FR is blast furnace fuel ratio; Described K1 is when described CSR increases an i1, the first number percent of described FR change;

Particularly, when described CSR increases an i1, first number percent of corresponding described FR may increase or reduce.

Described CRI ₀for reactive reference value; Described i2 is described CRI ₀basis change unit; Described K2 is when described CRI increases an i2, the second number percent of described FR change;

Particularly, when described CRI increases an i2, second number percent of corresponding described FR may increase or reduce.

Described M10 ₀for the reference value of scuff resistance; Described i3 is the basis change unit of M10; Described K3 is when described M10 increases an i3, the 3rd number percent of described FR change;

Particularly, as a described increase i3, the 3rd number percent of corresponding described FR may increase or reduce.

Described M40 ₀for the reference value of breaking resistance; Described i4 is the basis change unit of M40; Described K4 is when described M40 increases an i4, the 4th number percent of described FR change;

Particularly, as a described increase i4, the 4th number percent of corresponding described FR may increase or reduce.

Described a is the first correction coefficient, for guaranteeing that described first contribution margin SCV is not negative value.

In addition, for the blast furnace of different model, the representative value required each Indexes on Coke Strength using described blast furnace as the reference value of formula (2) each index, and determines the occurrence of K1, i1 parameter in formula (2) on the first quantitative relationship that blast furnace operating affects according to post-reaction strength CSR; According to reactive CRI, the second quantitative relationship that blast furnace operating affects is determined to the occurrence of K2, i2 parameter in formula (2); According to scuff resistance M10, the 3rd quantitative relationship that blast furnace operating affects is determined to the occurrence of K3, i3 parameter in formula (2); According to breaking resistance M40, the 4th quantitative relationship that blast furnace operating affects is determined to the occurrence of K4, i4 parameter in formula (2).

Particularly, the Indexes on Coke Strength that not isometric blast furnace requires is different, even if for the blast furnace of same volume, the Indexes on Coke Strength of different manufacturers is also discrepant, therefore, the described representative value in the present embodiment is the mean value of the Indexes on Coke Strength that domestic main large blast furnace at present uses.

In addition, described first quantitative relationship, the second quantitative relationship, the 3rd quantitative relationship and the 4th quantitative relationship are the quantitative effect data of corresponding coke index to blast furnace operating index of adding up with China Iron & Steel Association is benchmark.

Further, when providing an often fluctuation fundamental unit of various coke index in the statistics provided in " every Indexes on Coke Strength is to the quantitative effect of blast furnace operating index " that China Iron & Steel Association adds up, the undulating quantity of blast furnace operating index; The value of K1, i1 etc. in formula (2) can be determined accordingly, here, it should be noted that: the basis change unit of different index fluctuations is different, is also different to the influence degree of blast furnace operating index.

Here, described coke component target comprises: coke ash Ad, sulfur content in coke Std; Described second contribution margin CCV obtains according to formula;

$\mathrm{CCV}=\frac{\mathrm{Std}-{\mathrm{Std}}_0}{i5}*K5*\mathrm{FR}+\frac{\mathrm{Ad}-{\mathrm{Ad}}_0}{i6}*K6*\mathrm{FR}+b---\left(3\right)$

Wherein, in formula (3), described Std ₀for the reference value of sulfur content in coke; Described FR is blast furnace fuel ratio; Described i5 is the basis change unit of Std; Described K5 is when described Std increases an i5, the 5th number percent of described FR change;

Particularly, when described Std increases an i5, the 5th number percent of corresponding described FR may increase or reduce.

Described Ad ₀for the reference value of coke ash; Described i6 is the basis change unit of Ad; Described K6 is when described Ad increases an i6, the 5th number percent of described FR change;

Particularly, when described Ad increases an i6, the 6th number percent of corresponding described FR may increase or reduce.

Described b is the second correction coefficient, for guaranteeing that described second contribution margin CCV is not negative value.

In addition, for the blast furnace of different model, using the reference value of described blast furnace to representative value each index in model of each coke gray scale index request, and according to sulfur content in coke Std, the 5th quantitative relationship that blast furnace operating affects is determined to the occurrence of K5, i5 parameter in formula (3); According to coke ash Ad, the 6th quantitative relationship that blast furnace operating affects is determined to the occurrence of K6, i6 parameter in formula (3).

Particularly, described 5th quantitative relationship, the 6th quantitative relationship are the quantitative effect data of corresponding coke index to blast furnace operating index of adding up with China Iron & Steel Association is benchmark.

Further, when providing an often fluctuation fundamental unit of various coke index in the statistics provided in " every Indexes on Coke Strength is to the quantitative effect of blast furnace operating index " that China Iron & Steel Association adds up, the undulating quantity of blast furnace operating index; The value of K5, i5 etc. in formula (3) can be determined accordingly, here, it should be noted that: the basis change unit of different index fluctuations is different, is also different to the influence degree of blast furnace operating index.

Here, described CSR, CRI, M10, M40 four indices is interrelated, is namely interactional between four indices, but is not adjustment index important in coal blending process.In conjunction with in on-the-spot coal blending process to the complexity of various coal blending index adjustment, ash content and sulphur content are important adjustment indexes.In order to improve the sensitivity of described ash content and sulphur content change in the present embodiment, make the influence degree increasing ash content and sulphur content in coal blending process; Therefore, the ash content in giving information with China Iron & Steel Association is compared with the basis change unit of sulphur content, and the basis change unit of ash content described in the present embodiment and sulphur content respectively reduces 10 times.

When calculating gets described first contribution margin SCV and the second contribution margin CCV, calculate the performance number of described coke according to formula (1), i.e. the performance number P1 of described coking coal.

Step 111, calculates the cost performance of described coking coal according to formula C=P1/P2;

In this step, when after the performance number P1 getting coking coal, calculate the cost performance of described coking coal according to formula (4);

C＝P1/P2 (4)

Wherein, in formula (4), described P2 is the price of described coking coal.

The present invention, using the effect of coke in blast furnace as the foundation evaluating corresponding coking coal performance, sets up the quantitative calculation method of coking coal performance and cost performance.The quantitative relationship that the method adopts and basis all come from the data of production practice of blast furnace, more objective, avoid the impacts such as the subjective factor that artificial assignment brings, can serve production preferably.

The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. a coking coal cost performance method for quantitatively evaluating, is characterized in that, described method comprises:

The performance number of described coking coal is calculated according to formula P1=SCV+CCV;

The cost performance of described coking coal is calculated according to formula C=P1/P2; Wherein,

Described P1 is the performance number of described coking coal; Described SCV is the first contribution margin of Indexes on Coke Strength; Described CCV is the second contribution margin of coke component target; Described C is the cost performance of described coking coal; Described P2 is the price of described coking coal.

2. the method for claim 1, is characterized in that, described Indexes on Coke Strength comprises: breaking resistance M40, scuff resistance M10, reactive CRI, post-reaction strength CSR.

3. the method for claim 1, is characterized in that, described coke component target comprises: coke ash Ad, sulfur content in coke Std.

4. the method for claim 1, is characterized in that, described first contribution margin SCV is according to formula

$\frac{\mathrm{CSR}-{\mathrm{CSR}}_0}{i1}\×K1\×\mathrm{FR}+\frac{\mathrm{CRI}-{\mathrm{CRI}}_0}{i2}\×K2\×\mathrm{FR}+\frac{M10-M{10}_0}{i3}\×K3\×\mathrm{FR}+\frac{M40-M{40}_0}{i4}\×K4\×\mathrm{FR}+a$

Obtain; Wherein,

Described CSR ₀for the reference value of post-reaction strength; Described i1 is the basis change unit of described CSR; Described FR is fuel ratio; Described K1 is when described CSR increases an i1, the first number percent of described FR change;

Described CRI ₀for reactive reference value; Described i2 is described CRI ₀basis change unit; Described K2 is when described CRI increases an i2, the second number percent of described FR change;

Described M10 ₀for the reference value of scuff resistance; Described i3 is the basis change unit of M10; Described K3 is when described M10 increases an i3, the 3rd number percent of described FR change;

Described M40 ₀for the reference value of breaking resistance; Described i4 is the basis change unit of M40; Described K4 is when described M40 increases an i4, the 4th number percent of described FR change;

Described a is the first correction coefficient.

5. the method for claim 1, is characterized in that, described second contribution margin CCV is according to formula obtain; Wherein,

Described Std ₀for the reference value of sulfur content in coke; Described FR is blast furnace fuel ratio; Described i5 is the basis change unit of Std; Described K5 is when described Std increases an i5, the 5th number percent of described FR change;

Described Ad ₀for the reference value of coke ash; Described i6 is the basis change unit of Ad; Described K6 is when described Ad increases an i6, the 5th number percent of described FR change;

Described b is the second correction coefficient.