SU956570A1 - Method for utilizing heat of converter gas - Google Patents

Description

The invention relates to ferrous metallurgy, in particular, to methods of utilization of physical and chemical heat of converter gas, and can be used in metallurgical enterprises / for example in blast furnaces.

There is a known method of diverting the converter of. Gases, which includes transporting them from the flue due to the creation of a discharge in it and subsequent supply to the after-burning f 1.

However, this method does not allow efficient use of the converter gas heat due to the non-stationary process of the gas outlet during smelting, the complexity of the discharge equipment, since heat is lost during transportation of the hot converter gas to the place of its use, which reduces the efficiency of this method.

The closest to the proposed technical essence and the achieved result is a method of utilizing heat from the converter gas, which includes introducing it into the gas pipeline of blast furnace gas, the converter gas being introduced after cleaning by injecting natural gas G2.

However, costly rat fuel is expended to implement this method, and the physical heat of the converter gas is not efficiently used, since a significant part of it is lost during transportation to the point of entry into the blast furnace gas pipeline, moreover, ballast gaseous products of converter production enter mainly CO-j, which reduces calories

10 mixtures.

The purpose of the invention is to increase the efficiency of utilization of the physical heat of the converter gas.

The goal is achieved by agreeing to the method of utilizing heat from the converter gas, which includes mixing the converter gas with the blast furnace gas, into the converter gas with a temperature of 9501,200 ° C, before mixing it with the secondary gas, coal dust, for example, coke production waste, 05-0.08 kg per 1 cm of carbon dioxide gas converter.

Claims (2)

At temperatures above 950 ° C, carbon dioxide behaves as an oxidizing agent and, when interacting with carbon, forms two CO molecules. Mixing converter gas having a temperature of 1200 s with gt-coal. fuel causes CO to be converted to CO and a high-calorie gas is formed. The addition of coal dust, for example, coke production waste, in the amount of 0.05-0.08 kg per 1 m of carbon dioxide of the converter gas makes it possible to obtain as a result of the reaction a gaseous mixture consisting of CO from the jHOBHOM axis. At a concentration below 0.05 kg per 1 m of carbon dioxide of the converter gas, a large amount of ballast, unreacted CO, will be injected into the blast furnace mainline, if the concentration increases above the upper limit (0.08 kg per 1 m, it is possible to plug the main The reaction of the proposed method allows the use of physical heat converter gas directly at the place of formation of gas when part of the physical heat of the gas is converted into chemical fuel the temperature of the gas at m decreases, which allows reducing heat losses on the way to the main gas of the semolina gas.Example: Converter gas with a volume of 200 ml is heated to 950980s in a laboratory furnace of resistance to an airtight container with a metering unit. g coke dust. Sampling on the VTI analyzer is carried out through the same dosing unit. Analyzes show that after 10-15 with 70-80% of carbon dioxide is converted to CO. Example 2. The experiment was carried out with heating- / 200 ml of converter gas up to 1180-1200 s, then 12 g of coke dust were introduced and gas analysis was carried out, sampling after 10, 15, 20 and 25 and 30 s. In the sample taken at the tenth second, 85% of carbon dioxide was converted to CO. Example 3. An experiment was carried out with heating of converter gas to 950 ° C and the introduction of coke dust corresponding to the upper limit of concentration in 200 ml of gas. 16 g of coke dust were introduced, the transfer of 80% CO was carried out in 25-28 seconds. Thus, adding to the converter gas with a temperature of 950-1200s before mixing it with the blast furnace gas, coal dust, such as coke production waste, in an amount of 0.05-0.08 kg per 1 m of carbon dioxide of the converter gas allows to utilize physical heat directly from converter, which increases the efficiency of using physical heat of the converter gas, i.e. The gas pipeline to the blast furnace gas enters mainly chemical heat, mainly due to the fact that the physical heat of the converter gas is converted into chemical energy, and the losses: heat along the route to the gas main: reduced by reducing the temperature of the converter gas after reactions with coal dust. The proposed method makes it possible to more efficiently use the heat of the converter gas as poured by increasing its calorific value by 15-20%. . Claims of Invention A method for utilizing heat of converter gas, including mixing converter gas with blast furnace gas, characterized by the fact that, in order to increase the efficiency of the utility, -. In order to mix the physical heat of the gas, coal dust in an amount of 0.05-0.08 kg per 1 m of carbon dioxide is added to the converter gas with a temperature of 9501200С, before mixing with the blast furnace gas. Sources of information taken into account during the examination 1. USSR author's certificate No. 488865, cl. C 21 C 5/38, 1974. 2. Authors certificate of the USSR 439510, cl. C 21 C 5/38, 1973.