The nature of blast furnace gas is, what is the main component of blast furnace gas?

1) There are many non-combustible components in blast furnace gas, less combustible components (about 30%), and low calorific value, generally 3344-4180 kJ standard meters;

2) Blast furnace gas is a colorless, odorless and odorless gas, which is extremely toxic because of its high CO content;

3) The combustion speed is slow, the flame is long, and the temperature difference between the top and bottom of the coke cake is small;

4) When the coke oven is heated with blast furnace gas, the dust content in the gas is large, and it is easy to block the lattice bricks in the storage chamber;

5) The safety specification is specified at 1 meter; Air CO content should not exceed 30mg;

6) The ignition temperature is greater than 700 °C.

7) Blast furnace gas contains hydrogen (, methane (, CO (25-30%), carbon dioxide (9-12%), nitrogen (55-60%), oxygen (; The density is.

Extended Materials. Application of blast furnace gas in steel plant:

The successful development of pure blast furnace gas boiler power generation technology, gas-steam combined cycle generator set and high-temperature regenerative combustion technology has been successfully developed and widely used in iron and steel enterprises, which provides a good way for the effective utilization of blast furnace gas.

In addition to being used as heating fuel for iron and steel plants, blast furnace gas can also be used for other purposes such as power generation, and the use of this part of the by-product energy can not only reduce the energy consumption of enterprises, but also improve the pollution of steel enterprises to the surrounding environment.

In the production of coal gas in the blast furnace, CO plays the role of indirect reduction and heat transfer. The blast furnace operated at high pressure is conducive to reducing the coke ratio, and CO is easy to bind to red blood cells, thus causing poisoning.

Blast furnace gas. The main components are: CO, C02, N2, H2, CH4, etc., of which the CO content of combustible components accounts for about 25%, the content of H2 and CH4 is very small, and the content of CO2 and N2 accounts for %, calorific value respectively.

It is only about 3500kJ m3.

Carbon monoxide is the main ingredient in gas.

Hydrogen, which emits water and carbon dioxide after combustion.

There are trace amounts of CO2, HC and NOx.

Coke oven gas. Mainly composed of hydrogen and Kai Bao Xiang methane.

composition, 56% and 27%, respectively, with small amounts of carbon monoxide, carbon dioxide, nitrogen, oxygen and other hydrocarbons.

The approximate composition is 6-12% carbon dioxide, 28-33% carbon monoxide, 1-4% hydrogen, 55-60% nitrogen, hydrocarbons and a small amount of sulfur dioxide.

Characteristic. 1) There are many non-combustible components in blast furnace gas, less combustible components (about 30%), and low calorific value, generally 3344-4180 kJ standard meters;

2) Blast furnace gas is a colorless, odorless and odorless gas, because of the high CO content, so it is extremely toxic;

3) The combustion speed is slow, the flame is long, and the temperature difference between the top and bottom of the coke cake is small;

4) When the coke oven is heated with blast furnace gas, the dust content in the pants oak gas is large, and it is easy to block the lattice bricks in the storage chamber;

5) The safety specification is specified at 1 meter; Air CO content should not exceed 30mg;

6) The ignition temperature is greater than 700 °C.

The main components are carbon monoxide, hydrogen, and water and carbon dioxide are emitted after combustion. Blast furnace gas is a by-product of combustible gas in the production process of blast furnace ironmaking.

Its approximate composition is 6-12% carbon dioxide, 28-33% carbon monoxide, 1-4% hydrogen, 55-60% nitrogen, hydrocarbons and a small amount of sulphur dioxide. Its dust concentration is 10-50 grams cubic meters (standard condition), and the average dust production is 50kg t (pig iron) -75kg t (pig iron).

Generally speaking, the larger the type of gas generator, the larger the required coal particle size, which is in the range of about 20-80mm.

Gas generator, inspection temperature and fire detection should be used as operating parameters at the same time, do not simply use one side to define the quality of the furnace, the normal fire layer can only prove that the middle combustion of the single-stage gas generator is very good, the inspection temperature is also within the normal range to be considered the whole furnace is running normally, to see the inspection temperature to determine, the normal inspection temperature is between 320-500 degrees, and some places also stipulate between 350-650.

Generally, anthracite or binicot is used for gas stoves. Generally, the granularity of anthracite is 15-25mm, 25-50mm, and the granularity of soot is 25-50mm

Non-sticky coal, weakly cohesive coal, long-flame coal, old lignite. Coal types can be used: Datong coal, Tongchuan coal, Inner Mongolia Baotou coal, Shenmu coal, etc. At the same time, it must meet the standards of gas generators.

Project Technical Specifications.

Particle size(mm) 20 40;25～50；30 60 Ratio of maximum particle size to minimum particle size 2

The lower limit rate of lump coal (%) is 10

Gangue content (%)2

Dry basis volatile matter VD (%) 20

Dry base ash ad (%) 18

Total sulfur on a dry basis 2

Ash melting softening temperature st( )1250

Thermal stability ts 6 (%)60

Categories: Education, Science, >> Science & Technology.

Problem description: What is blast furnace gas?

How to deal with it, how to use it.

Analysis: The high-pressure blower (roots blower) blows air, and enters the blast furnace after heating through the hot blast stove, this hot air and coke fuel combustion, producing carbon dioxide and carbon monoxide, carbon dioxide and hot coke to produce carbon monoxide, carbon monoxide in the process of rising, reducing the iron element in the iron ore, making it pig iron, this is the chemical process of ironmaking. The molten iron is temporarily retained at the bottom of the furnace and released at regular intervals for direct steelmaking or ingots.

At this time, in the furnace gas of the blast furnace, there is still a large amount of excess carbon oxide, which is the "blast furnace gas".

This gas containing combustible carbon monoxide is a gaseous fuel with low calorific value, which can be used for the self-use gas of metallurgical enterprises, such as heated hot-rolled steel ingots, preheated steel ladles, etc. It can also be supplied to civilian use, and if it can be added to coke oven gas, it is called "mixed gas", which increases the calorific value.

One of the explanations for the occurrence of furnace coal disturbance gas containing gas. The main components are carbon monoxide, hydrogen, nitrogen, carbon dioxide, etc. There are two types: air gas and mixed gas.

The former is made by the interaction of coal and air; The latter is prepared by the action of air and steam from coal, and the calorific value is higher than that of the former. It is used for the heating of metal heating furnaces, glass kilns and coke ovens, and can also be used as a blending gas for high calorific value gas.

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Han Explanation of Coal Gas The gas made from coal is explained in detail Shen Yuan. Pyrotechnic gases produced when fuel is burned. Tang Feng Zhen "Southern Fireworks: Night Pearl":

A scholar married Chen Kuan and Li Shi Gongren, and the night fire was evil. ”.The main components of the gas obtained from dry distillation coal are hydrogen, methane, ethylene, carbon monoxide, and a small amount of nitrogen