CN102735816A - Method for judging cost performance of coking coal - Google Patents

Abstract

The invention relates to a method for judging the cost performance of coking coal. The method comprises the following steps of: 1) setting the basic quality index standard of all coal types, wherein the quality indexes comprise ash content, volatile component, sulfur content, Y value and G value; and carrying out analysis on the coal rock; 2) setting the standard of deduction and reward scores on quality; and 3) according to an actual analysis result, calculating the cost performances of various coals by the basic quality standard, the deduction standard and the incoming price of the coals, wherein the cost performance can be obtained by dividing the quality evaluation score by the price of all the coals. The method is simple, and is good in operability and unified in standard.

Description

A kind of method of judging the coking coal cost performance

Technical field

The invention belongs to coking industry, particularly a kind of determination methods of coking coal cost performance.

Background technology

The coking coal of existing market is of a great variety; Mainly contain coking coal, rich coal, bottle coal, lean coal, 1/3 coking coal etc.; And each coal has many producers, and each tame quality, price are uneven, and the cost performance of coking coal just becomes the main foundation that the coke-oven plant can buy better quality products at good values.But the cost performance of coking coal can only judge by rule of thumb that operability is poor, the standard that neither one is unified.

Summary of the invention

In order to overcome the shortcoming of prior art, the present invention provides a kind of method of judging the coking coal cost performance, and its method is simple, good operability, and standard is unified.

The present invention solves the technical scheme that its technical matters takes: comprise the following steps: 1), according to GB/T5751-2009 (classification indicators of coal for coking) regulation and own factory quality requirements to each coal; Formulate the gross index standard of each coal; Quality index comprises ash content, volatile matter, sulfur, Y value, G value; See table 1, and coal petrography is analyzed, see table 2;

2), formulate the standard of quality deduction of points and reward score, see table 3, table 4 according to standard-required;

3), according to the actual result of laboratory test of various coals, through above-mentioned gross standard and standard of deducting point and coal advance price at factory lattice, calculate the cost performance of various coals, cost performance=each ature of coal amount is estimated score/price.

The inventive method is simple, good operability, and standard is unified.

Embodiment

1), the present invention includes the following step: according to GB/T 5751-2009 (classification indicators of coal for coking) regulation and own factory quality requirements to each coal; Formulate the gross index standard of each coal; Quality index comprises ash content, volatile matter, sulfur, Y value, G value; See table 1, and coal petrography is analyzed, see table 2;

2), formulate the standard of quality deduction of points and reward score, see table 3, table 4 according to standard-required;

For example: 0.1 ↑ expression coking coal of coking coal ash apportion advances the actual result of laboratory test of factory and the standard in the table 1 compares, and the every rising 0.1% of ash content was detained 3 fens, and other is similar;

For example: coking coal ash apportion ↓ 0.1 expression coking coal advances the actual result of laboratory test of factory and the standard in the table 1 compares, and the every reduction by 0.1% of ash content was rewarded 3 fens, and other is similar;

In addition,, learn angle from microcosmic and estimate marking,, give 10 fens, in scope, do not give the 5-9 branch if in the standard code scope to advancing factory's coal according to the coal petrography analysis and distinguishing standard of table 2 clean fine coal;

3), according to the actual result of laboratory test of various coals, through above-mentioned gross standard and standard of deducting point and coal advance price at factory lattice, calculate the cost performance of various coals, computing formula: cost performance=each ature of coal amount is estimated score/price; Concrete computing method are following:

(1), March 11, Handan head of the horse ature of coal figureofmerit and the price of entering factory on the 13rd see the following form 5;

(2), according to the deduction of points and the reward score standard of the quality standard of table 1 and table 3, table 4, above-mentioned table 5 is marked:

A, elder generation are decided to be 200 fens with the benchmark branch of ash content, volatile matter, sulfur, Y, G five indices.(this score value can be fixed according to the use habit oneself of oneself, and through test of many times, it is more satisfactory to find that reference value is decided to be this numeric ratio)

B, for the coal that is numbered W285, the ash content result of laboratory test is 9.79%, standard is 10%, according to standards of grading, every reduction by 0.1% was rewarded 3 fens, rewarded mark=(10-9.79)/0.1 * 3=6.3; In like manner can calculate the volatile matter button 0.2 minute; Sulfur was rewarded 30 fens; Y rewarded 40 fens; G rewarded 35 fens; Rmax is 1.25%, in the critical field of coking coal, gives 10 fens.

C, comprehensive a, two steps of b, the final score of coal W285=(200+6.3)+(200-0.2)+(200+30)+(200+40)+(200+35)+10=1121.1

D, cost performance=each ature of coal amount is estimated the * 100=72.98% of score/price=(1121.1/1536.24), sees table 6.

(3), according to said method, can carry out quality score to coal W342, wherein, ash content is rewarded 9.6 minutes, volatile matter button 8.82 minutes, sulfur and was rewarded 24 minutes, Y button 50 minutes; G button 50 minutes; Rmax is 1.05%, and the critical field of out of focus coal differs from 0.15%, gives 6 fens.The final cost performance of calculating=each ature of coal amount is estimated the * 100=60.58% of score/price=(930.78/1536.24), sees table 6.

Therefore, be all Handan head of the horse coal of coking coal, because of the change of indexs such as the volatile matter on March 13, Y value, G value, price does not become, and cost performance reduces, can judge thus, be inappropriate with that batch head of the horse coal in same price purchase March 13.

Claims (1)

1. method of judging the coking coal cost performance; It is characterized in that: comprise the following steps: 1), according to GB/T 5751-2009 (classification indicators of coal for coking) regulation and own factory quality requirements to each coal; Formulate the gross index standard of each coal, quality index comprises ash content, volatile matter, sulfur, Y value, G value, sees table 1; And coal petrography analyzed, see table 2;

2), formulate the standard of quality deduction of points and reward score, see table 3, table 4 according to standard-required;

3), according to the actual result of laboratory test of various coals, through above-mentioned gross standard and standard of deducting point and coal advance price at factory lattice, calculate the cost performance of various coals, cost performance=each ature of coal amount is estimated score/price.