CN104312607A - Coal blending method of high-metamorphic coking coal for coking - Google Patents

Abstract

The invention discloses a coal blending method of high-metamorphic coking coal for coking. The method comprises the following steps: 1) measuring the average maximum reflection rate of vitrinites of the high-metamorphic coking coal and other single coking coal, counting the ratios of the areas as shown in the specification, measuring the maceral of single coal rack, and counting the content of inertinite; 2) confirming the coal blending ratio of single coal, and ensuring that the percentages of the average maximum reflection rate areas of the five vitrinites of the complex coal are sequentially 10-30%, 10-30%, 20-40%, 15-25% and 2-20%, and the content of inertinite of the maceral of the coal rack is 25-35%. According to the coal blending method, the above indexes of the complex coal are selected to blend coal, high-quality coked carbon can be still smelted even if the Y value and the Golgi maximum flow degree of the complex coal are less than a relatively level, and thus the high-quality coal resource with good flowability can be saved.

Description

High rotten coking coal participates in the blending method of coking

Technical field

The invention belongs to metallurgical coking technology field, be specifically related to the blending method that a kind of high rotten coking coal participates in coking.

Background technology

The fugitive constituent V of conventional coking coal in coking coal _dafbetween 18 ~ 28%, the average maximum reflectivity of vitrinite between 1.15 ~ 1.50%.Wherein coking coal between 1.35 ~ 1.50% is called high rotten coking coal, this kind of height goes bad coking coal caking index G value generally between 75 ~ 90, plastometer indice Y value is generally between 14 ~ 20mm, Gu-softening temperature is interval general between 50 ~ 75 DEG C, Ji Shi maximum fluidity is between 10 ~ 500ddpm, turgidity b value is between 10% ~ 50%, and coarse grain inlays component concentration between 38 ~ 78%.Blending method traditionally, the Y value of mixed coal needs to reach more than 15mm, and Ji Shi maximum fluidity reaches more than 300ddpm, just can produce high grade coke.

But contriver finds in Coking Test for Blend and production application practice: australian Sa Aji ore deposit coking coal between 1.35 ~ 1.50%, Shanxi Jinzhong area and Luliang Prefecture's part coking coal, a certain proportion of above-mentioned coking coal participates in coal-blending coking, mixed coal Y value is only between 12mm ~ 15mm, Ji Shi maximum fluidity is also in the low value scope between 60ddpm ~ 300ddpm, but refines hot strength of coke CSR reaches more than 65%.

Visible, when there being high rotten coking coal to participate in coal-blending coking, if the Y value still putting undue emphasis on mixed coal reaches more than 15mm, Ji Shi maximum fluidity reaches more than 300ddpm, transition will certainly consume that plastic mass is enriched, the high-quality caking coal resource of good flowing properties, cause the wasting of resources, increase enterprise's production cost.

Summary of the invention

Technical problem to be solved by this invention is to provide one the coke making and coal blending method that high rotten coking coal participates between 1.35 ~ 1.50%, mixed coal Y value of avoiding coveting reaches more than 15mm, Mei Jishi maximum fluidity is coordinated to reach more than 300ddpm, plastic mass is enriched, the phenomenon of the high-quality caking coal resource of good flowing properties to cause transition to consume, avoid the wasting of resources, increase the performance of enterprises.

For solving the problems of the technologies described above, the height designed by the present invention go bad coking coal participate in coke making and coal blending method comprise the steps:

1) the average maximum reflectivity of vitrinite of each coal of the high rotten coking coal of mensuration, other participation coal-blending cokings, statistics ${\stackrel{\&OverBar;}{R}}_{\max }\&le;0.70\%,0.70\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;0.85\%,0.85<{\stackrel{\&OverBar;}{R}}_{\max }\&le;$ $1.35\%,1.35\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.50\%,1.50\%<{\stackrel{\&OverBar;}{R}}_{\max }$ Interval proportion, and measure its single grade coal macerals composition, adds up its inertinite content, and the described height coking coal that goes bad is between 1.35 ~ 1.50%, G value is between 75 ~ 90, Gu-softening temperature is interval between 50 ~ 75 DEG C, turgidity b value is between 10% ~ 50%, and coarse grain inlays the coking coal of component concentration between 38 ~ 78%;

2) one group of Coal Blending Schemes is drafted according to following ranges: high rotten coking coal allocation ratio 10 ~ 25%, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 10 ~ 20%, middle iso-metamorphism coking coal allocation ratio 15 ~ 35%, lean coal allocation ratio 3 ~ 10%; Described middle iso-metamorphism coking coal is the average maximum reflectivity of vitrinite coking coal between 1.15 ~ 1.35%;

3) Coal Blending Schemes drafted is tested, inspecting standard: reflectivity interval distribution proportion is 15% ~ 25%, mixed coal vitrinite reflectance interval distribution proportion is 10 ~ 30%, reflectivity interval distribution proportion is 10% ~ 30%, reflectivity interval distribution proportion is 20% ~ 40%, reflectivity interval distribution proportion is 2% ~ 20%; Control inertinite content 25% ~ 35% in mixed coal macerals composition;

4) if draft Coal Blending Schemes not reach inspecting standard, Coal Blending Schemes is adjusted, inflation method: which or which the interval distribution proportion of reflectivity does not meet the demands, then high to this interval distribution proportion coal allocation ratio adjusts; If inertinite content does not meet the demands in mixed coal macerals composition, then the allocation ratio of inertinite too high levels or too low coal is adjusted.Until meet the inspecting standard of Coal Blending Schemes, complete the formulation of Coal Blending Schemes.

Further, described height goes bad the Y value of coking coal between 14mm ~ 20mm, and the Y value of mixed coal is between 12mm ~ 15mm, and Ji Shi maximum fluidity is between 10 ~ 500ddpm.

Further, the large Giseeler fluidity of described mixed coal is between 60 ~ 200ddpm.

Further, described step 2) in, high rotten coking coal allocation ratio 15 ~ 23%, bottle coal allocation ratio 10 ~ 25%, 1/3 coking coal allocation ratio 15 ~ 25%, rich coal allocation ratio 13 ~ 18%, middle iso-metamorphism coking coal allocation ratio 20 ~ 30%, lean coal allocation ratio 5 ~ 8%.

Further, described step 3) in, inspecting standard is: in mixed coal, and vitrinite reflectance is interval $1.35\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.50\%$ Distribution proportion is 15% ~ 23%, ${\stackrel{\&OverBar;}{R}}_{\max }\&le;0.70\%$ Interval distribution proportion is 15 ~ 30%, interval distribution proportion is 20% ~ 27%, $0.85\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.35\%$ Interval distribution proportion is 23% ~ 36%, $1.50\%<{\stackrel{\&OverBar;}{R}}_{\max }$ Interval distribution proportion is 2% ~ 10%; Control inertinite content 30% ~ 35% in mixed coal macerals composition.

The reason that the present invention selects this two indices of inertinite content in control reflectivity distribution interval, macerals to carry out coal blending is: contriver is through the discovery that studies for a long period of time: the ratio in the distribution of reflectivity interval between 1.35% ~ 1.50% can characterize the quality of the high coking coal active ingredient vitrinite that goes bad, and the coke cold and hot state intensity that the rotten coking coal of height is transformed in the vitrinite in this interval is high; There is high rotten coking coal to participate in coal-blending coking, work as reflectivity when interval distribution proportion reaches 15% ~ 25%, the effect of STRENGTH ON COKE cold and hot state strength support is large, no longer needs to consider the technic indexs such as mixed coal Y value, Ji Shi maximum fluidity, can refine to obtain high grade coke.

The ratio controlling the distribution of other reflectivity interval is the allocation ratio in order to control other coals.

Due to inertinite in macerals change into coke after there is intensity defect, deteriorated coke strenth with around component bonding interface, therefore, inertinite content range is limited.

The present invention is by controlling mixed coal vitrinite reflectance ${\stackrel{\&OverBar;}{R}}_{\max }\&le;0.70\%,0.70\%<{\stackrel{\&OverBar;}{R}}_{\max }$ $\&le;0.85\%,0.85\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.35\%,$ 1.35％～1.50％、 $1.50\%<{\stackrel{\&OverBar;}{R}}_{\max }$ In distributed area proportion, mixed coal macerals, inertinite content controls the allocation ratio of each coal, is conducive to science, efficiently coal blending and improves coke strenth.

Embodiment

Below in conjunction with embodiment, the present invention is further detailed explanation.

There are 7 kinds of coking coal resources in certain factory, wherein 2 kinds height between 1.35 ~ 1.50% goes bad coking coal, is numbered A ore deposit, B ore deposit respectively; The height in these two kinds of ore deposits goes bad coking coal G value between 75 ~ 90, and turgidity b value is between 10% ~ 50%, and coarse grain inlays component concentration between 38 ~ 78%.Other coals 5 ore deposit points, be numbered C ore deposit (bottle coal), D ore deposit (1/3 coking coal), E ore deposit (rich coal), F ore deposit (middle iso-metamorphism coking coal respectively, if without known definition, please define at this), H ore deposit (lean coal); Determine the average maximum reflectivity of each single coking coal respectively to reflectivity ${\stackrel{\&OverBar;}{R}}_{\max }\&le;0.70\%,0.70\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;0.85\%,0.85\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.35\%,$ 1.35% ~ 1.50%, distributed area proportion is added up; Determine each ore deposit point coal macerals, wherein inertinite content is added up.

Then, draft one group of Coal Blending Schemes according to following ranges: high rotten coking coal allocation ratio 10 ~ 25%, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 10 ~ 20%, middle iso-metamorphism coking coal allocation ratio 15 ~ 35%, lean coal allocation ratio 3 ~ 10%.

Then, test to the Coal Blending Schemes drafted, inspecting standard is: in mixed coal, and vitrinite reflectance is interval distribution proportion is 15% ~ 23%, interval distribution proportion is 15 ~ 30%, interval distribution proportion is 20% ~ 27%, interval distribution proportion is 23% ~ 36%, interval distribution proportion is 2% ~ 10%; Control inertinite content 30% ~ 35% in mixed coal macerals composition.

Finally, if draft Coal Blending Schemes not reach inspecting standard, Coal Blending Schemes is adjusted, inflation method: which or which the interval distribution proportion of reflectivity does not meet the demands, then high to this interval distribution proportion coal allocation ratio adjusts accordingly; If inertinite content does not meet the demands in mixed coal macerals composition, then the allocation ratio of inertinite too high levels or too low coal is adjusted accordingly.Until meet the inspecting standard of Coal Blending Schemes, complete the formulation of Coal Blending Schemes.

In the some coal vitrinite reflectance distribution of each ore deposit, macerals, inertinite content results is in table 1, carries out the specific embodiment of coke making and coal blending in table 2 according to the inventive method.

Inertinite content in the some coal vitrinite reflectance distribution of table 1 each ore deposit, macerals

Wherein, Gu softening temperature is interval: 51 DEG C, A ore deposit, 70 DEG C, B ore deposit; Ji Shi maximum fluidity A ore deposit 19ddpm, B ore deposit 297ddpm.

The adjustment implementation method of blending ratio:

In embodiment 1-1, although each coal blend ratio meets area requirement, in mixed coal, the interval proportion of vitrinite reflectance≤0.70% and inertinite content sum are respectively higher than specified requirement, and hot strength of coke CSR is less than 65%.Because of the interval proportion of vitrinite reflectance≤0.70% in bottle coal C ore deposit and inertinite content the highest, its proportioning is down to 25% by 30%, the corresponding raising 5% of A ore deposit proportioning, see embodiment 1, in mixed coal, the interval proportion of vitrinite reflectance≤0.70% is down to less than 30% by 31.51%, in mixed coal, inertinite content sum is down to less than 35% by 35.29%, completes the adjustment of Coal Blending Schemes, and hot strength of coke CSR brings up to 67.06% by 63.17%.

In embodiment 4-1, although each coal blend ratio meets area requirement, in mixed coal, vitrinite reflectance is at 1.35 ~ 1.50% interval proportions lower than specified requirement, and hot strength of coke CSR is less than 65%.Because vitrinite reflectance in B ore deposit is higher at 1.35 ~ 1.50% interval proportions, its proportioning is increased to 20% by 15%, the corresponding minimizing 5% of D ore deposit proportioning, see embodiment 4, in mixed coal, vitrinite reflectance brings up to 16.65% in 1.35 ~ 1.50% interval ratios by 14.25%, complete the adjustment of Coal Blending Schemes, hot strength of coke CSR brings up to 66.21% by 64.38%.

The Coal Blending Schemes of table 2 embodiment 1 ~ 4,1-1,4-1

Powder craft after tradition is first joined, without precomminution and selective molecular attraction, without coal damping, without moulded coal, under the dress coke oven dry coke quenching condition of tradition more than 4.3 meters top, adopt the inventive method gained hot strength of coke CSR 65 ~ 70%, M40 is 87 ~ 89%, M10 is 5.5 ~ 6%, and comparatively prior art reduces coal blending cost more than 4,000,000 yuan/month.

According to existing blending method, in order to ensure that mixed coal Y value reaches more than 15mm, coordinating Mei Jishi maximum fluidity to reach more than 300ddpm, weakly caking bottle coal, lean coal consumption need be reduced, increasing by 1/3 coking coal of plastic mass relative abundance, coking coal and rich coal consumption.

The Coal Blending Schemes of comparative example 1,2,3,4 is in table 3.

The cold and hot state intensity of comparative example 1,2,3,4 coking charcoals is in table 4.

The Coal Blending Schemes of table 3 comparative example 1,2,3,4

Table 4 comparative example 1,2,3,4 coking charcoal cold and hot state intensity

Comparative example	M25/％	M10/％	CRI/％	CSR/％
					Comparative example 1	91.09	8.98	18.81	67.96
Comparative example 2	89.96	9.54	20.02	65.47
					Comparative example 3	89.71	9.42	20.77	65.12
Comparative example 4	90.7	9.22	19.68	66.93

As can be seen from table 3 and table 4 column data, comparative example 1,2,3,4 is compared with embodiment 1,2,3,4, and coke quality is in peer-level, mixed coal cost respectively high 7 yuan ~ 8 yuan/ton, affect Business Economic Benefit.

Claims (6)

1. the coke making and coal blending method that participates in of high rotten coking coal, described height goes bad the average maximum reflectivity of vitrinite of coking coal between 1.35 ~ 1.50%, it is characterized in that:

The method comprises the steps:

1) the average maximum reflectivity of vitrinite of each coal of the high rotten coking coal of mensuration, other participation coal-blending cokings, statistics ${\stackrel{\&OverBar;}{R}}_{\max }\&le;0.70\%,0.70\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;0.85\%,0.85\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.35\%,1.35\%$ $<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.50\%,1.50\%<{\stackrel{\&OverBar;}{R}}_{\max }$ Interval proportion, and measure its single grade coal macerals composition, adds up its inertinite content, and the described height coking coal that goes bad is between 1.35 ~ 1.50%, G value is between 75 ~ 90, Gu-softening temperature is interval between 50 ~ 75 DEG C, turgidity b value is between 10% ~ 50%, and coarse grain inlays the coking coal of component concentration between 38 ~ 78%;

2) coal blending is carried out by following scheme: high rotten coking coal allocation ratio 10 ~ 25%, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 10 ~ 20%, middle iso-metamorphism coking coal allocation ratio 15 ~ 35%, lean coal allocation ratio 3 ~ 10%; Described middle iso-metamorphism coking coal is the average maximum reflectivity of vitrinite coking coal between 1.15 ~ 1.35%;

And in guarantee mixed coal: the average maximum reflectivity of vitrinite is interval distribution proportion is 15% ~ 25%, interval distribution proportion is 10 ~ 30%, interval distribution proportion is 10% ~ 30%, interval distribution proportion is 20% ~ 40%, interval distribution proportion is 2% ~ 20%; Inertinite content 25% ~ 35% in macerals composition.

2. height according to claim 1 goes bad the coke making and coal blending method that coking coal participates in, and it is characterized in that: described height goes bad the Y value of coking coal between 14mm ~ 20mm, and the Y value of mixed coal is between 12mm ~ 15mm, and Ji Shi maximum fluidity is between 10 ~ 500ddpm.

3. height according to claim 1 and 2 go bad coking coal participate in coke making and coal blending method, it is characterized in that: the large Giseeler fluidity of described mixed coal is between 60 ~ 200ddpm.

4. height according to claim 1 and 2 go bad coking coal participate in coke making and coal blending method, it is characterized in that: described step 2) in, high rotten coking coal allocation ratio 15 ~ 23%, bottle coal allocation ratio 10 ~ 25%, 1/3 coking coal allocation ratio 15 ~ 25%, rich coal allocation ratio 13 ~ 18%, middle iso-metamorphism coking coal allocation ratio 20 ~ 30%, lean coal allocation ratio 5 ~ 8%.

5. height according to claim 1 and 2 goes bad the coke making and coal blending method that coking coal participates in, and it is characterized in that: described step 3) in, inspecting standard is: in mixed coal, and vitrinite reflectance is interval distribution proportion is 15% ~ 23%, interval distribution proportion is 15 ~ 30%, $0.70\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;0.85\%$ Interval distribution proportion is 20% ~ 27%, $0.85\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.35\%$ Interval distribution proportion is 23% ~ 36%, interval distribution proportion is 2% ~ 10%; Control inertinite content 30% ~ 35% in mixed coal macerals composition.

6. height according to claim 3 goes bad the coke making and coal blending method that coking coal participates in, and it is characterized in that: described step 3) in, inspecting standard is: in mixed coal, and vitrinite reflectance is interval distribution proportion is 15% ~ 23%, interval distribution proportion is 15 ~ 30%, $0.70\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;0.85\%$ Interval distribution proportion is 20% ~ 27%, $0.85\%<{\stackrel{\&OverBar;}{R}}_{\max }\&le;1.35\%$ Interval distribution proportion is 23% ~ 36%, interval distribution proportion is 2% ~ 10%; Control inertinite content 30% ~ 35% in mixed coal macerals composition.