1. Perspectives of Development of Ukrainian Coke Industry according to requirements of blast furnace production
Eugene . Kovalov, Dr. Sci. (Eng.)
Ukrainian State research institute of Carbochemistry
2007

2. Coke plants of Ukraine
СЛАЙД 1

3. Structure of Ukrainian Coke Production
56 coke oven battery
Coke Plants -12
GIPROKOKS
Coke
Operations - 2
Phenol plant - 1
Ukrainian State research institute of Carbochemistry (UKHIN)
Capacity t/year
Machine-building Plants - 2
UKRKOKS
Association
СЛАЙД 2

4. Coke production
Capacity 24
СЛАЙД 3

5. Coke production in
2006
СЛАЙД 3’

6. Trend of coke import in Ukraine
2005
2006
Russia – near 97%
Poland – 80%
Romania – 2%
Japan – 0,2%
China – 0,05%
Russia – near 20%
Japan – 1%

7. Import-export of Coke in Ukraine
- 2005
- 2006
СЛАЙД 4

8. Properties of Coal Blends
Table 1
Indices and measurement units
Values
Ukraine
Leading Producers
Ash, dry base, Ad, %
8,5-9,0
≤ 8,5
Total sulphur, dry base, Sdt, %
1,5-2,5
≤ 1,0
Volatile matter, Vdaf, %
29-32
≤ 27
Plastic layer y, mm
14-18
14-16
Ash Basity Index
0,25-0,35
≤ 0,16
Средний произвольный показатель отражения витринита, Ro, %
≥ 1,2
Показатель неоднородности шихты по стадиям метаморфизма витринита, R, %
≤ 0,15
Parameters of carbonization:
Конечная температура, 0С
≥ 1000
Carbonization rate, mm/h
≤ 28
СЛАЙД 5

9. Indices and measurement units
Coke Properties
Indices and measurement units
Values
Ukraine
Leading Producers
Coke reactivity, CRI, %
35-40
≤ 30
Coke strength after reaction, CSR, %
45-50
≥ 60
Mechanical strength by Micum-drum, %:
М40
68-70
≥ 80
М10
7-8
≤ 7
Ash, dry base, Ad, %
≤ 12
≤ 11
Total sulphur, dry base, Sdt, %
≤ 1,5
≤ 1
Volatile matter, Vdaf, %
СЛАЙД 6

10. Different Types of Coke Structure
(Polarized Light, 400Х)
а)– from coal of grade Г; б) – ГЖ; в) и г) – Ж; д) – К; е – ОС. а) b) c) d) e) f)
СЛАЙД 7

11. Dependence of the Reactivity on Content of Anisotropic Structures
Reactivity, mg/g·min
СЛАЙД 8

12. The Reactivity and the Strength of Sertain Carbonic Materials after Reaction
Object
CRI, %
CSR, %
Pitch coke
15,8
76,2
Petroleum coke
14,0
75,3
Pyrocarbon
12,1
73,0
СЛАЙД 9

13. Insertions into Coke (Polarized Light, 400Х)
СЛАЙД 10

14. Basic Trends of Increasing of Coke Quality
Development of rational raw base for coking
Rational coking technology
Final coke treatment
forming the required properties of coal blends, foremost as per ash, sulphur content, coal rank
decreasing coking rate to not to exceed
24 mm/h ,
dry quenching and soak-time of coke at a premix chamber
the decrease in the amount of concentrates used for coal blends at every plant; the reduction of sulphur content and the increase in blend rank by increasing of mining volumes of Ukrainian low-sulphur coals and importing high-rank coals
rational level of final temperatures ( oC)
rational level of the mechanical loads on the coke during its sorting, additional machining of coke to realize available centers of mechanical tensions and crack forming,
blend additives of organic mesogenetic substances which increase the order of coke structure, and also prepared anisotropic materials like, for instance, petroleum coke
additional soak-time for coke at a chamber (0,5-1,5 hours)
coverage of coke surface with organic materials (for closing of pores and cracks) and inorganic substances (inhibitors of gas process)
CRI
CSR
СЛАЙД 11

15. Development of Rational Raw Base for Coking
CSR
forming the required properties of coal blends, foremost as per ash, sulphur content, coal rank. It means the increase in coal washing depth and the ash reduction of coal concentrates; the increase of coal homogeneity as per spectrographic composition
the reduction of sulphur content and the increase in blend rank by increasing of mining volumes of Ukrainian low-sulphur coals and importing high-rank coals
blend additives of organic mesogenetic substances which increase the order of coke structure, and also prepared anisotropic materials like, for instance, petroleum coke.
CRI
СЛАЙД 11’

16. Rational coking technology
CSR
control of physical and chemical processes for transformation of isotropic coke texture to anisotropic one (increasing the coke carbon order) - decreasing coking rate to not to exceed 24 mm/h, rational level of final temperatures ( oC), additional soak-time for coke at a chamber (0,5-1,5 hours).
CRI
СЛАЙД 11’’

17. Final coke treatment CSR CRI
dry quenching and soak-time of coke at a premix chamber, rational level of the mechanical loads on the coke during its sorting, additional machining of coke to realize available centers of mechanical tensions and crack forming, coverage of coke surface with organic materials (for closing of pores and cracks) and inorganic substances (inhibitors of gas process).
CRI
СЛАЙД 11’’’