A system and method for closed-loop utilization of tail gas in iron ore reduction process
A technology for iron ore and tail gas, which is applied in the petroleum industry, fixed bed gasification, and the manufacture of combustible gas. It can solve the problems of low calorific value and large emission of iron ore reduction tail gas, and improve the reduction efficiency and reduction rate. , Reduce the emission of pollutants, reduce the effect of CO2 and water vapor content
Inactive Publication Date: 2021-01-26
CHONGQING UNIV
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a system for closed-loop utilization of tail gas in the reduction process of iron ore, and to provide corresponding methods for its use, so as to solve the problem of low calorific value of tail gas in iron ore reduction in the prior art. Joint Enterprise CO 2 Technical issues with large emissions
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0059] figure 2 It is a schematic diagram of an experimental platform for closed-loop utilization of iron ore reduction tail gas technology, and the device is used to simulate the system and method of the present invention. A closed-loop reduction experiment was carried out by taking sinter with different particle sizes in a steel plant as an example. The composition of the sinter was TFe: 57.44%, FeO: 8.88%, SiO 2 : 8.48%, Al 2 o 3 : 1.87%, CaO: 11.95%, MgO: 1.47%.
[0060] Weigh 500g of sintered ore with a particle size of 3-4mm and 10-13mm respectively for reduction experiments. image 3 It is the variation curve of reduction degree of sinter with different particle sizes with reduction time. From the curve, it can be seen that sinter with different particle sizes has achieved good reduction effect within 120 minutes, and the reduction rate of 3-4mm sinter is higher than that of 10-13mm sinter. Figure 4-a and Figure 4-b It is the change curve of flue gas components ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a system and method for closed-loop utilization of tail gas in the reduction process of iron ore. The system comprises an iron ore reduction furnace, a first dust removal purification device, a tail gas conversion furnace, a second dust removal purification device and a heat exchanger. According to the method, the heat value of the iron ore reduction tail gas is increased,and CO2 emission of steel and iron combined enterprises is lowered. The method comprises the steps: water vapor and CO2 in the iron ore reduction tail gas are converted into H2 and CO through a carbonconversion method, then the iron ore reduction tail gas is introduced into the iron ore reduction furnace again, a reducing agent and heat are provided for reduction of the iron ore, and closed-looputilization of the tail gas is achieved. According to a process, on the one hand, physical sensible heat and chemical energy of the iron ore reduction tail gas are efficiently recovered, the CO2 in the tail gas is utilized, the heat value of the tail gas is increased, and CO2 emission is lowered; and on the other hand, the iron ore reduction efficiency can be greatly improved, the product qualityis improved, and the reduction conditions in the reduction furnace are improved.
Description
technical field [0001] The invention belongs to the technical field of ferrous metal smelting, and specifically relates to a system and method for closed-loop utilization of tail gas in iron ore reduction process Background technique [0002] Since global warming caused by greenhouse gases has had a huge impact on the global climate, the Chinese government has promised the world that the unit GDP output value CO 2 Emissions are reduced by 40% to 45% compared to 2005. my country is the largest steel producer in the world. In 2010, my country's steel industry CO 2 Emissions account for the country's CO 2 About 15% of the emissions, while my country's iron and steel enterprises tons of steel CO 2 Emissions are about 15% higher than in developed countries. Therefore, saving energy and reducing consumption and realizing the low-carbon development of the iron and steel industry are the inevitable requirements for my country's iron and steel industry to take the road of sustain...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00C10J3/20C10J3/06C10J3/82
Inventor 扈玫珑杨宇马通祥李燕刘鹏杰邓青宇
Owner CHONGQING UNIV