Calculation formula of coking process

Calculation formula of coking process (I) Crushing strength of metallurgical coke (M40 drum index)

The crushing strength of metallurgical coke is an index reflecting the crushing performance of coke, which is expressed as a percentage. Its calculation formula is:

Day by day (month) (after the test, the block size is greater than 40 mm)

Crushing strength of metallurgical coke (M40)(%)= sum of percentages (%) × metallurgical coke output (ton).

× 100%

Total output of metallurgical coke (ton)

Description of calculation: Calculated according to the specified moisture (water quantity). If foreign drum test is adopted, it should be calculated and explained according to the actual situation.

(2) Crushing strength of metallurgical coke (M25 drum index)

The crushing strength of metallurgical coke is an index reflecting the crushing performance of coke, which is expressed as a percentage. Its calculation formula is:

Daily (monthly) smelting (after the test, the block size is greater than 25mm).

Crushing strength of metallurgical coke (M25)(%)= percentage (%) × sum of metallurgical coke output (ton)

× 100%

Total output of metallurgical coke (ton)

(3) Wear resistance of metallurgical coke (M 10 drum index)

The wear resistance strength of metallurgical coke is an index reflecting the wear resistance of coke, expressed in percentage, and its calculation formula is:

Day by day (month) (after testing, the block size is less than 10 mm)

Wear resistance of metallurgical coke (M 10)(%)= sum of percentages (%) × metallurgical coke output (ton))

× 100%

Total output of metallurgical coke (ton)

Calculation instructions: According to the specified moisture (water quantity), if foreign drum test is adopted, it is calculated according to the actual situation, and it is explained that this index is actually the wear rate, and the smaller the index value, the better.

(4) Metallurgical coke ash

Metallurgical coke ash refers to the percentage of ash in metallurgical coke. Its calculation formula is:

Metallurgical coke ash (%) = total ash in metallurgical coke (ton)

× 100%

Total output of metallurgical coke (dry basis) (ton)

(5) Sulfur content of metallurgical coke

Sulfur content in metallurgical coke refers to the percentage of sulfur content in metallurgical coke. Its calculation formula is:

Sulfur content in metallurgical coke (%) = total sulfur content in metallurgical coke (ton)

× 100%

Total output of metallurgical coke (dry basis) (ton)

(6) qualified rate of metallurgical coke

The qualified rate of metallurgical coke refers to the percentage of qualified metallurgical coke in the total amount of metallurgical coke inspection. As long as one of the quality indexes of metallurgical coke does not meet the national standards, it will be regarded as unqualified. The calculation formula of metallurgical coke qualification rate is:

l2i'H

Qualified rate of metallurgical coke (%) = qualified quantity of metallurgical coke (ton)

× 100%

Total inspection quantity of metallurgical coke (ton)

(7) Full coke rate

The full coke rate (coke formation rate) refers to the percentage of coke obtained after dry distillation of coal into the furnace. Its calculation formula is:

Total coke ratio (%) = total coke output (dry basis) (ton)

}XYV eI

× 100%

Total coal quantity (dry basis) (ton)

f

(VIII) Metallurgical coke ratio

Metallurgical coke rate refers to the percentage of metallurgical coke output to all screened coke output. Its calculation formula is:

b9zHh

Metallurgical coke ratio (%) = metallurgical coke content (dry basis) (ton)

× 100%

Total output of coke (dry basis) (ton)

@fC

xc[@lr

Calculation description: Metallurgical coke output refers to the coke output greater than 25mm.

(9) Coking consumes clean coal.

Coking clean coal consumption refers to the amount of wet clean coal consumed per ton of coke (full coke dry basis) (including priced water, but excluding storage consumption and transportation consumption). Its calculation formula is:

Consumption of coking clean coal (ton/ton) = consumption of clean coal in the furnace (including pricing water, but excluding storage consumption and transportation consumption) (ton)

Total output of coke (dry basis) (ton)

(10) consumption of clean coal per ton of coke

The consumption of clean coal per ton of coke refers to the consumption of wet clean coal per ton of coke (full coke dry basis) (total water, including storage consumption and transportation consumption). Its calculation formula is:

Clean coal consumption per ton of coke (ton/ton) =

p

Clean coal consumption (including priced water, including storage consumption and transportation consumption) (ton)

Total output of coke (dry basis) (ton)

(1 1) Coking heat consumption

Coking heat consumption refers to the heat that needs to be supplied to the coke oven when 1 kg coal is smelted into coke. As a comparison, the heat consumption of wet coal converted into 7% moisture is generally calculated. Its calculation formula is:

Equivalent coking heat consumption of dry coal (Ji Jiao/kg) (dry coal) = heating gas quantity (cubic meter) × gas calorific value (Ji Jiao/cubic meter).

Actual dry coal loading (kg)

%

Actual moisture wet coal heat consumption (Ji Jiao/kg) (wet coal) = equivalent dry coal coking heat consumption ×( 1- actual coal moisture (%)) (Ji Jiao/kg) (dry coal)

8:= & amp； =9%

7% moisture wet coal coking heat consumption (Ji Jiao/kg) = actual moisture wet coal coking heat consumption (Ji Jiao/kg) (wet coal) -q (actual moisture of wet coal (%)-7%).

When the coke oven is heated by coke oven gas:

In which q-Q—7×4. 1868 kJ.

C

When the coke oven is heated by blast furnace gas:

formula

Q=8×4. 1868 kJ

Calculation description:

(FG(

(l) The flow rate of the heating gas shall be corrected according to the exchange time (K change). When the actual temperature and pressure of the gas used for coke oven heating are consistent with those selected in the design, the reading on the dial of the flowmeter is the flow in the standard state, otherwise, the temperature correction (KT) and.

Pressure correction (KP).

(2) When using mixed gas for heating, the weighted arithmetic average calculation should be carried out according to the consumption and calorific value of various gases.

(12) unit energy consumption of coking process

The total net energy consumption of coking process refers to the mechanical repair and detection of coal preparation workshop (excluding coal washing), raw coal loss in the plant, coking workshop, recovery workshop (condensation blast, ammonia recovery, crude benzene, desulfurization and cyanide removal, yellow blood salt) and auxiliary production system of the process production system.

? (

Measurement, environmental protection, etc. , and the physical quantities of various energy consumed by canteens, baths, health stations, lounges, production management and dispatching command systems of subsidiary production systems that directly serve production are deducted from the recovered external energy and converted into standard coal.

The energy consumption in coking process refers to the energy (dry basis) consumed in producing one ton of coke. Its calculation formula is:

Raw coal equivalent to standard coal (kg)- external supply of coking products (kg)+

Standard coal quantity converted from process energy consumption (kg/ton) = standard coal quantity converted from process energy consumption (kg)-standard coal quantity converted from waste heat recovery for external supply (kg)

Total output of coke (dry basis) (ton)

Gl & gt？ I

Calculation description:

The molecule in formula (1) is the total net energy consumption of coking process;

(2) Raw coal is dry-cleaned clean coal loaded into coke oven;

(3) The external supply of coking products refers to the quantity of coke, coke oven gas, crude tar and crude benzene. Supply to external factories (workshops);

-

(4) Processing energy consumption refers to blast furnace gas, water, electricity, steam and compressed air;

Visual recognition system

(5) Waste heat recovery for external supply, such as steam supply to other factories (workshops).

(13) Physical labor productivity of coking workers

The physical labor productivity of coking workers refers to the quantity of coke produced by each coking worker and apprentice in the coking workshop (section) during the reporting period. Its calculation formula is:

Physical labor productivity of coking workers (ton/person) = total coke production (dry basis) (ton)/average number of coking workers and apprentices (person)

(14) coking turnaround time of coke oven chamber

The coking turnover time of coke oven carbonization chamber refers to the average time required for coking turnover once per hole carbonization chamber during the reporting period. Its calculation formula is:

"

Coking turnaround time of coke oven carbonization chamber (hour: minute/hole) =

Actual operating time (hours)

Actual total number of furnace holes (holes)

Calculation description: actual operation time (hours) = calendar time ×24 (hours) × number of coke oven holes.

(15) moisture of coke

Coke moisture refers to the percentage of water content in coke to the total coke. Its calculation formula is:

Water content of coke (%) = total water content of coke (ton)

× 100%

Total output of coke (ton)

Calculation instructions: According to the regulations, it is necessary to sample and test coke with different lumps in coke at the metering position. All-day coke moisture can be calculated by simple arithmetic average method; Monthly (annual) coke moisture is calculated by daily (monthly) weighted arithmetic average method.

(16) Volatile substances in metallurgical coke

Volatile matter of metallurgical coke refers to the percentage of volatile matter contained in metallurgical coke in the total output of metallurgical coke. Its calculation formula is:

Volatile matter of metallurgical coke (%) = total volatile matter contained in metallurgical coke (dry ash-free basis) (ton)

× 100%

Total output of metallurgical coke (dry basis) (ton)

Calculation shows that the volatile matter of coke is obtained through experimental analysis according to relevant regulations. When the output is not much different and the numerical fluctuation is small, simple arithmetic average calculation can be adopted, otherwise weighted arithmetic average calculation should be adopted.

(XVII) Coke crushing rate

Coke crushing rate refers to the percentage of coke with different crushing grades in the total coke output. Its calculation formula is:

Coke crushing rate (%) = quantity of coke with certain crushing specifications (dry basis) (ton)

× 100%

Total screened coke output (dry basis) (ton)

Calculation instructions: The coke quantity of a certain size refers to the coke crushing rate calculated according to different specifications for cokes larger than 40mm, 25 ~ 40mm, 10 ~ 25mm and smaller than 10mm.

(XVIII) Consumption of other coking raw materials

Other materials include natural gas, fresh water, electricity, steam, etc. Its consumption refers to the amount of a certain material consumed per ton of coke, and its calculation formula is:

Natural gas (Ji Jiao/ton) = natural gas consumption of the whole plant (Ji Jiao)

Coke output (dry basis) (ton)

Fresh water (kg/ton)

Fresh water consumption of the whole plant (kg)

Coke output (dry basis) (ton)

Electricity (kW? Hour/ton) = power consumption of the whole plant (kW? Time)

Coke output (dry basis) (ton)

Steam (Ji Jiao/ton) = Steam consumption of the whole plant (Ji Jiao)

Coke output (dry basis) (ton)

Compressed air (m3/ ton) = compressed air consumption of the whole plant (m3)

Coke output (dry basis) (ton)

Calculation description:

(l) The consumption of other coking materials refers to the consumption of the whole plant (including the recovery system, etc.). ).

(2) When calculating the workshop consumption index, all workshops except the coking workshop are calculated according to the product system, that is, the neutron term in the formula is the total consumption of water, electricity and gas for producing the product, and the parent term is the output of the product.

(19) Coal loading per hole

Coal loading per hole refers to the average dry coal loading per hole in the carbonization chamber during the reporting period. Its calculation formula is:

Coal quantity per hole (ton/hole) = total coal quantity (dry basis) (ton)

Number of tapholes (holes)

(20) Capacity utilization rate of coke oven

The utilization rate of coke oven capacity is an index reflecting the gap between the actual coke output and the designed coke oven capacity in the reporting period. Its calculation formula is:

Capacity utilization rate of coke oven (%) =

Actual coke output (full coke, dry basis) (ton)

× 100%

Coke output (full coke, dry basis) calculated according to design parameters (ton)

(2 1) effective volume utilization coefficient of coke oven chamber

The utilization coefficient of effective volume of coke oven carbonization chamber (also called calendar utilization coefficient of coke oven) refers to the average daily qualified total coke quantity per cubic meter of effective volume of coke oven carbonization chamber in calendar working hours. It comprehensively reflects the level of coke oven production technology and management.

Important indicators. Its calculation formula is:

Effective volume utilization coefficient of coke oven carbonization chamber (ton/m3? Day) = Qualified full coke output (dry basis) (ton)

Number of coke oven holes × number of effective carbonization chambers per hole

Volume (m3) × (calendar days) (days)

Calculation description:

(1) The number of coke oven holes and the effective volume of the carbonization chamber shall be calculated according to the design regulations.

(2) When the number of holes in each coke oven and the effective volume of its carbonization chamber are different in the whole plant, the utilization coefficient of coke ovens with the same effective volume should be calculated first, and then the comprehensive utilization coefficient of the whole plant should be calculated by using the weighted arithmetic average method with the total effective volume of each carbonization chamber as the weight.

(22) Coking time

Coking time (carbonization time) refers to the total interval between the flat coal bar entering the small oven door and the coke pusher contacting the coke to start coke pushing. Its calculation formula is:

Coking time (hours/hole) = actual summary coking time (hours)

Total number of holes actually discharged (units)

Calculation description:

The statistical time of (1) sub-term and parent term should be consistent.

(2) The actual summary coking time refers to the sum of coking time of each furnace in statistical time.

(3) The average coking time of several coke ovens is calculated by weighted arithmetic average.

(XXIII) Planning coefficient (K 1)

Planning coefficient is an index reflecting the change of coking time of coking furnace, which is expressed by K 1. Its calculation formula is:

Planning coefficient (K 1)= number of planned furnace holes per shift-number of furnace holes where the planned coking time differs from the specified coking time by more than 5 minutes.

The number of holes planned for each shift.

(XXIV) Execution coefficient (K2)

The execution coefficient is an index reflecting whether the coke pushing operation of the coke oven is normal, and it is expressed by K2. Its calculation formula is:

Execution coefficient (K2)= actual number of furnace holes per shift-the number of furnace holes whose actual coke pushing time differs from the planned coke pushing time by more than 5 minutes.

The number of holes planned for each shift.

(25) Total pusher coefficient (K3)

The total coke pushing coefficient is an index reflecting the management level of the coking workshop (section) in implementing the specified coking time, which is expressed by K3. Its calculation formula is:

Total pusher coefficient (K3)= planning coefficient (K 1)× execution coefficient (K2)

Calculation description:

(1) The coke pushing time is calculated according to the time when the coke pusher comes into contact with the coke cake; The coal loading time is calculated by the time when the leveling rod starts to enter the small oven door.

(2) Except for maintenance furnace and buffer furnace.

(26) Coal loading coefficient

Coal loading coefficient is an index to reflect the uniformity of coal loading. Its calculation formula is:

Coal loading coefficient = the number of holes in the actual coal loading furnace of this grade-the number of holes that differ from the specified coal loading by plus or minus ±200kg.

The actual number of holes in this level of coal charging furnace

(XXVII) Temperature uniformity coefficient (K uniformity)

Temperature uniformity coefficient refers to the uniformity coefficient of average temperature of coke oven flue. It is an index reflecting the heating uniformity of coke oven, which is expressed by K uniformity. Its calculation formula is:

K uniform =2M (Machine A+ Coke A)

2M

Where m refers to the number of coke oven combustion chambers;

Machine A and Coke A-The flue temperature measured on the machine side and coke side respectively exceeded the average temperature.

+/-20℃ (30℃ for side furnace).

Calculation instructions: except maintenance furnace and buffer furnace.

(28) Temperature stability coefficient (K stability)

The temperature stability coefficient is an index reflecting the average temperature stability in the temperature measuring flue of coke oven, which is expressed by K stability. Its calculation formula is:

K diazepam = 2n- (one machine+one coke)

2N

Where n refers to the number of measurements of linear temperature in the analysis period.

Machine A and coke A refer to the times when the average straight-ahead temperature on the machine side and coke side respectively exceeds the standard deviation of 7℃ specified by the heating system.

(29) Furnace head temperature coefficient (K furnace head)

The burner temperature coefficient is an index reflecting the temperature uniformity of the burner flue, which is expressed by K burner. Its calculation formula is:

K burner = number of coke oven flues and number of coke side burners-number of unqualified flues

Number of coke oven flue and coke side burner

The calculation shows that the number of unqualified flues refers to the number of flues whose flue temperatures on the machine side and coke side differ from their average temperatures by more than 50℃. The average burner temperature refers to the average temperature of all burner flue temperatures, including the side furnace.

(30) Horizontal temperature coefficient (K level)

Transverse row temperature coefficient is an index reflecting the transverse temperature uniformity of combustion chamber, which is expressed by K transverse row. Its calculation formula is:

K horizontal row = number of specified horizontal rows of temperature measuring fire paths-number of unqualified fire paths.

Specify the number of fire exits for horizontal temperature measurement.

The calculation shows that the number of unqualified flues refers to the number of flues whose measured temperature differs from the standard line temperature by more than 20℃ (single row), 10℃ (ten rows) and 7C (whole furnace).

small