Desulfurization and denitration combustion improver in blast furnace coal injecting as well as preparation method and using method thereof

A desulfurization, denitrification, and combustion-supporting agent technology, applied in the field of combustion-supporting agents, can solve the problems affecting the stability of the blast furnace, reducing the combustion rate of pulverized coal, reducing the replacement ratio of coal and coke, etc., to achieve the promotion of ignition characteristics and burnout index, and to reduce NOx and SOx emissions, and the effect of improving combustion efficiency

Active Publication Date: 2018-09-04
马鞍山科宇环保设备股份有限公司
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the current raw materials and process conditions, when the injection coal ratio of the ironmaking blast furnace exceeds a certain threshold, the combustion rate of pulverized coal injected into the blast furnace will decrease, thereby reducing the coal coke replacement ratio, increasing the coke load, and affecting The normal and stable operation of the blast furnace brings inconvenience to the operation of the blast furnace

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 more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A blast furnace injection pulverized coal desulfurization and denitrification combustion aid, made of the following raw materials in weight percentage: 21.5% of manganese dioxide, 7% of iron oxide, 11.2% of barium carbonate, 13% of calcium oxide, 5.5% of sodium carbonate, rare earth oxide 12.2%, titanium dioxide 4.5%, potassium nitrate 4.8%, and the balance is activated carbon.

[0027] The rare earth oxide is made of the following raw materials in weight percentage: 50% of yttrium oxide, 28% of lanthanum oxide, and 22% of indium oxide; the average particle size of the rare earth oxide is 15 μm.

[0028] The preparation method of the above-mentioned pulverized coal desulfurization and denitrification combustion aid for blast furnace injection comprises the following steps:

[0029] (1) take each raw material by formula ratio;

[0030] (2) pulverize the activated carbon and pass through a 40-mesh sieve, then add raw materials other than rare earth oxides to the activate...

Embodiment 2

[0033] A blast furnace injection pulverized coal desulfurization and denitrification combustion aid, made of the following raw materials in weight percentage: 23% of manganese dioxide, 5% of iron oxide, 13% of barium carbonate, 12% of calcium oxide, 7% of sodium carbonate, rare earth oxide 13%, titanium dioxide 4%, potassium nitrate 6%, and the balance is activated carbon.

[0034] The rare earth oxide is made of the following raw materials in weight percentage: 55% of yttrium oxide, 25% of lanthanum oxide, and 25% of indium oxide; the average particle size of the rare earth oxide is 10 μm.

[0035] The preparation method of the above-mentioned pulverized coal desulfurization and denitrification combustion aid for blast furnace injection comprises the following steps:

[0036] (1) take each raw material by formula ratio;

[0037] (2) pulverize the activated carbon and pass through a 50-mesh sieve, then add raw materials other than rare earth oxides to the coarse activated car...

Embodiment 3

[0040] A blast furnace injection pulverized coal desulfurization and denitrification combustion aid, made of the following raw materials in weight percentage: 20% manganese dioxide, 8% iron oxide, 9% barium carbonate, 10% calcium oxide, 8% sodium carbonate, rare earth oxide 10%, titanium dioxide 2%, potassium nitrate 5%, and the balance is activated carbon.

[0041] The rare earth oxide is made of the following raw materials in weight percentage: 40% of yttrium oxide, 35% of lanthanum oxide, and 25% of indium oxide; the average particle size of the rare earth oxide is 40 μm.

[0042] The preparation method of the above-mentioned pulverized coal desulfurization and denitrification combustion aid for blast furnace injection comprises the following steps:

[0043] (1) take each raw material by formula ratio;

[0044] (2) pulverize the activated carbon and pass through a 30-mesh sieve, then add raw materials other than rare earth oxides to the activated carbon coarse powder, mix ...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a desulfurization and denitration combustion improver in blast furnace coal injecting as well as a preparation method and a using method thereof. The desulfurization and denitration combustion improver is prepared from the following raw materials in percentage by weight: 18 to 23 percent of manganese dioxide, 5 to 8 percent of ferric oxide, 9 to 13 percent of barium carbonate, 10 to 16 percent of calcium oxide, 5 to 8 percent of sodium carbonate, 10 to 16 percent of rare earth oxide, 2 to 6 percent of titanium dioxide, 3 to 6 percent of potassium nitrate and the balanceof activated carbon; the rare earth oxide is prepared from the following raw materials in percentage by weight: 40 to 55 percent of yttrium oxide, 25 to 35 percent of lanthanum oxide and 20 to 30 percent of indium oxide; the average particle diameter of the rare earth oxide is 10 to 40 mum. The desulfurization and denitration combustion improver provided by the invention has a remarkable combustion-supporting effect on pulverized coal, the combustion efficiency of the pulverized coal can be effectively improved, emission of NOx and SOx can be effectively reduced, and the purposes of energy conservation and emission reduction can be achieved.

Description

technical field [0001] The invention relates to the technical field of combustion accelerants, in particular to a blast furnace injection pulverized coal desulfurization and denitrification combustion accelerant and its preparation method and use method. Background technique [0002] Due to the characteristics of my country's energy structure of "rich in coal, poor in oil, and low in gas", it is difficult for my country to change the energy consumption structure dominated by coal for a long period of time. At present, the traditional coal combustion method cannot realize the efficient utilization of coal, resulting in a great waste of resources. At the same time, due to the existence of elements such as N and S in coal, a large amount of SO will be produced during combustion. x , NO x Pollutant gases such as heavy metals and polycyclic aromatic hydrocarbons have an impact on the environment. [0003] The combustion process of coal is complex, generally divided into three s...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
CPCC10L9/10C10L2230/22
Inventor 汪茂晓
Owner 马鞍山科宇环保设备股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products