1 General Provisions
1.0.1 This code is prepared with a view to implement national laws and regulations, guidelines and policies, enhance scientific management for coking project execution, optimize equipment level and promote technology progress in design of coking technology so as to have a better economical, environmental and social benefits and a sustainable development of the coking industry.
1.0.2 This code is applicable for the design of top-charging coke oven and stamp-charging coke oven with 4.3m or higher coking chamber for metallurgical coke production.
1.0.3 New technologies and processes with the features of advancement and applicability, safety and reliability, cost-effectiveness and energy saving and environment protection shall be adopted in the coking technology design so as to improve comprehensive benefits.
1.0.4 In addition to the requirements stipulated in this code, those stipulated in the current relevant standards of the nation shall be complied with.
2 Terms
2.0.1
top-charging coke oven
it is referred to the coke oven for which the coal charge is fed through the charging hole on oven top into coking chamber
2.0.2
stamp-charging coke oven
it is referred to the coke oven for which the coal charge is stamped into coal cake by stamping machine and then pushed from pusher side into coking chamber
2.0.3
coal charge
it is referred to the coal to be charged into coke oven for cokemaking after various grades of coal are blended, crushed and mixed
2.0.4
coke dry quenching
it is referred to the technology to cool down hot coke with inert gas
2.0.5
fineness of coal charge
it is referred to an index measuring the crushing degree of coal charge, indicated by weight percent of coal grain size 0-3mm over the total coal charge
2.0.6
low calorific value of gas
it is referred to the heat released from complete combustion per unit volume of gas when the water, as a combustion product, stays at gaseous state
2.0.7
mixed gas
it is referred to the low calorific value mixed fuel gas of small amount of coke oven gas blended with blast furnace gas for coke oven heating
2.0.8
gross coking time
it is referred to the time interval between two pushes (or charges ) for the same coking chamber during coke oven operation
2.0.9
bulk density of coal charge
it is referred to the mass per unit volume of coal charge in the coking chamber
2.0.10
density of coal cake
it is referred to the mass per unit volume of coal cake
2.0.11
coke yield
it is referred to the weight percent of coke produced (on dry basis ) under coke oven carbonization in amount of coal charge (on dry basis )
2.0.12
metallurgical coke yield
it is referred to the weight percentage of the coke with grain size bigger than 25mm in total coke
2.0.13
heat consumption for coking
it is referred to the heat required for coke oven to carbonize 1kg coal charge into coke
2.0.14
heat consumption for wet coal
it is referred to the heat required for coke oven to carbonize 1kg wet coal charge into coke
2.0.15
equivalent heat consumption for dry coal
it is referred to the heat required for coke oven to carbonize wet coal charge equivalent to 1kg dry coal into coke
2.0.16
ultimate side load of heating wall
it is referred to the maximum value of combustion chamber heating wall withstanding lateral pressure
2.0.17
lean gas
it is referred to the low calorific value gas for coke oven heating, such as blast furnace gas, generator gas and mixed gas, etc..
2.0.18
coke oven machinery
it is referred to the general name of special equipment for cokemaking operation
2.0.19
ratio between height and diameter of C.D.Q chamber
it is referred to the ratio between equivalent height and inner diameter of the C. D. Q cooling chamber
3 General Requirements
3.0.1 The quantity, quality and supply conditions of raw material and fuels shall be determined according to the requirement of this code in the design of coking technology.
3.0.2 The coke oven type and oven numbers shall be determined according to construction scale, construction condition, coal resource, technical equipment level and coke making process, etc..
