Blast-furnace coke colloid composite anticatalyst and spraying device

A negative catalyst, blast furnace coke technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of high price, limited application of iron and steel enterprises, unstable application effect, etc., and achieve good spraying effect.

Inactive Publication Date: 2008-08-06
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common feature of this kind of invention patents is that boric acid is used as a passivating agent. Since the aqueous solution does not form a high-temperature-resistant colloid, the application effect is unstable and limited, and the price is expensive, which limits the application of iron and steel enterprises.

Method used

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  • Blast-furnace coke colloid composite anticatalyst and spraying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Using the colloidal composite negative catalyst of the present invention, the coke of a certain iron and steel company is sprayed, the concentration of the colloidal solution is controlled to be 4%, and the spraying amount is 1.8% to 2%, that is, 18 to 20 kg of the colloidal solution is sprayed per ton of coke, equivalent to A composite negative catalyst that consumes 0.8-1.0 kg per ton of coke. In the laboratory, the reactivity (CRI) of coke is reduced from 24.2% to 18%, and the strength after reaction (CSR) is increased from 60.6% to 71.1%. For the effect of industrial production, the ratio of coke entering the furnace is reduced by 25% per ton of iron kg, the amount of coal injection increased by 29 kg per ton of iron, and the blast furnace utilization factor increased by 0.16 tons / m 3 ·d, that is, the effective volume of each cubic meter of blast furnace produces 0.16 tons of pig iron per day and night, and the 450 cubic meter blast furnace produces 72 tons of iron ...

Embodiment 2

[0018] With the colloidal composite negative catalyst of the present invention, it is used for four kinds of cokes of Huaxin, Sangas, Guxian and Jianyang of Tianjin Iron and Steel Company, and the spraying concentration is 0.18%~2% of the composite negative catalyst colloid solution of 5%, four kinds of cokes The reactivity (CRI) decreased by 1.4 to 2.7 percentage points, and the strength after reaction (CSR) increased by 0.4 to 5.2 percentage points.

[0019] Fully illustrated by the above examples, the colloidal composite negative catalyst of the present invention is used to process blast furnace coke, which can obviously reduce the high temperature reactivity (CRI) of coke and improve the strength (CSR) after reaction in the laboratory, and is applied to blast furnace ironmaking production, It can significantly reduce the coke ratio and improve the utilization factor of the blast furnace, which is a powerful measure to realize the energy saving and emission reduction of the ...

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Abstract

The invention relates to blast furnace coke colloid compound negative catalyst and a spraying device which belong to the blast furnace ironmaking field and are suitable for lowering the coke rate in blast furnace ironmaking. The supporting role of the coke to a stock column in a blast furnace can be increased through lowing the reactivity of the coke and increasing the strength after reaction, the permeability of the lower portion of the blast furnace is improved, and the purpose for increasing the smelting intensity, increasing the blast furnace output and lowering coke rate the is reached. The negative catalyst and a spraying device are characterized in that the colloid compound negative catalyst is composed of silica sol and bentonite, the ratio between the silica sol and the bentonite in solution is 1:1, the ratio between boric acid and magnesium chloride in solute is equal to 2:8-8:2, and the ratio between dissolvent and the solute is 9:1. The colloid compound negative catalyst is diluted to the concentration of 2%-8% with clean water under the temperature of 60DEG C-80DEG C and mixed sufficiently, a rustless steel ball valve nozzle whose pressure (1-10kg) can be adjusted is used to spray the colloid compound negative catalyst to the surface of rolling coke in a fog shape, the purpose for spraying evenly is achieved, and the spraying amount is controlled within 1%-5%, namely 10-50 kilograms catalyst are sprayed on one ton coke. The coke rate is lowered by 15-30 kilograms for iron each ton, the blast furnace utilization coefficient is increased by 0.15-0.3t / m3.d, and the invention is suitable for the coke with different specifications and quality.

Description

technical field [0001] The invention belongs to the field of blast furnace ironmaking, and is suitable for reducing the coke ratio in blast furnace ironmaking. By reducing the reactivity of coke and increasing the strength after reaction, the supporting effect of coke on the material column in the blast furnace is improved, and the air permeability of the lower part of the blast furnace is improved. To achieve the purpose of increasing smelting intensity, increasing blast furnace output and reducing coke ratio. Background technique [0002] To reduce the blast furnace coke ratio, there are many technologies such as optimizing coking coal blending and improving coke quality. The technology closest to the patent of this invention is the passivation treatment of coke, such as: improving the thermal performance of Anyang coke by Associate Professor Zhu Zizong of Chongqing University. Experimental research, Zhengzhou Science and Technology Commission agency company's coke passiva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/02C10L9/00
Inventor 许满兴许赞文
Owner UNIV OF SCI & TECH BEIJING
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