Ferro Coke Carbonization Temperature Optimization
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Solution Overview
Problem
Current methods for manufacturing ferrocoke do not optimize CO2 reactivity of coke in blast furnaces, leading to high reducing agent ratios and thermal reserve zone temperatures, despite the catalytic effect of reduced iron ore.
Innovation Solution
A metallurgical ferrocoke manufacturing method involving briquetting a carbonaceous material and iron ore, with carbonization temperatures between 800°C and 900°C, and a ferrocoke particle diameter of 15 mm to 28 mm, using a vertical furnace with a specific gas composition to enhance CO2 reactivity and reduce thermal reserve zone temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carbonization temperature is decreased to improve CO2 reactivity of coke, then CO2 reactivity is improved, but thermal reserve zone temperature in blast furnace increases
Solution Approach 1:
The invention changes the carbonization temperature parameter to a specific range (800-900°C) that optimizes both CO2 reactivity and thermal reserve zone temperature. This parameter optimization resolves the contradiction by finding the optimal point where CO2 reactivity is sufficiently high while thermal reserve zone temperature is maintained at acceptable levels.
Solution Approach 2:
The invention uses a composite material consisting of carbonaceous material and iron ore mixed together before carbonization. The iron ore component (5-40 mass%) provides catalytic effect that enhances CO2 reactivity of the coke, allowing the system to achieve high reactivity without excessively lowering carbonization temperature, thus resolving the contradiction between reactivity and thermal reserve zone temperature.
2Measurement precision
If carbonization temperature is decreased to increase CO2 reactivity, then CO2 reactivity increases, but reducing agent ratio in blast furnace increases
Solution Approach 1:
By optimizing the carbonization temperature to 800-900°C, the invention achieves high CO2 reactivity without excessively lowering the temperature, thereby avoiding the need to increase reducing agent ratio. This parameter optimization directly resolves the contradiction between CO2 reactivity and reducing agent ratio.
Solution Approach 2:
The composite material of carbonaceous material and iron ore creates coke with enhanced CO2 reactivity through catalytic effect of reduced iron ore. This allows the blast furnace to achieve efficient reduction reactions with lower reducing agent ratio, resolving the contradiction between reactivity and reducing agent quantity.
3Measurement precision
If iron ore content is increased to enhance catalytic effect, then CO2 reactivity increases, but manufacturing cost and complexity increase
Solution Approach 1:
The invention optimizes the iron ore content parameter to a specific range (5-40 mass%) that provides sufficient catalytic effect for high CO2 reactivity while avoiding excessive complexity in the manufacturing process. This parameter optimization resolves the contradiction between reactivity enhancement and manufacturing simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively increases CO2 reactivity of ferrocoke, decreasing the reducing agent ratio in blast furnaces while maintaining a necessary carbonization temperature, thus contributing to heat adjustment and improved blast furnace operations.
Implementation Method 1
carbonizing the briquette
Implementation Method 2
CO 2 reactivity of coke in ferrocoke due to a catalytic effect of reduced iron ore
Implementation Method 3
a furnace top gas of the vertical furnace is used as a gas that heats up the briquette
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An object of the present invention is to provide a method of manufacturing ferrocoke by which CO2 reactivity of coke in ferrocoke in a blast furnace is increased thereby decreasing a thermal reserve zone temperature and decreasing a reducing agent ratio when a briquette including a carbonaceous material and iron ore is carbonized to manufacture ferrocoke. The present invention is a metallurgical ferrocoke manufacturing method of manufacturing ferrocoke by carbonizing a mixture of a carbonaceous material and iron ore and is characterized in that a maximum temperature of ferrocoke during the carbonization is in a range of 800°C or higher and 900°C or lower.