Flash Smelting Furnace Nozzle with Inclined Blade for Gas Revolving
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Solution Overview
Problem
In flash smelting furnaces, the region just below the raw material supply device experiences low temperatures and poor mixing of raw materials with reaction gases, hindering reaction progression and efficiency.
Innovation Solution
A raw material supply device with a lance structure that includes a first gas pathway for oxygen-rich air, a raw material pathway for concentrate, and a second gas pathway for auxiliary gas, featuring a blade with an inclined face to revolve the first gas towards the lower side, enhancing mixing and reaction uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a main blow is supplied into the reaction shaft to promote reaction, then the reaction speed increases, but the temperature in the region just below the raw material supply device decreases, making it difficult to promote concentrate reaction
Solution Approach 1:
The gas supply system is segmented into multiple pathways: a first gas pathway through the lance for main blow, a second gas pathway through the raw material pathway for auxiliary gas, and a third gas pathway through the shaft for additional gas supply. This segmentation allows different gas flows to serve different functions in different regions of the reaction shaft.
Solution Approach 2:
Different gas pathways are directed to different regions of the reaction shaft with different gas flow characteristics. The first gas pathway provides high-velocity main blow for overall reaction promotion, while the second gas pathway provides auxiliary gas specifically to the region below the raw material supply device to maintain local temperature and promote concentrate reaction in that specific zone.
2Productivity
If gas is blown directly downward to increase reaction speed, then productivity improves, but mixing of raw material and gas for reaction becomes insufficient
Solution Approach 1:
The system uses multiple gas pathways with different flow directions and velocities to create dynamic flow patterns. The first gas pathway provides downward main blow, while the second gas pathway introduces auxiliary gas that interacts with the main blow to create turbulent mixing, ensuring both high reaction speed and uniform mixing.
Solution Approach 2:
The auxiliary gas from the second gas pathway acts as an intermediary that facilitates mixing between the main blow gas and raw material. It creates a transition zone that enhances contact and mixing efficiency between the high-velocity main blow and the concentrate particles.
3Productivity
If the reaction progresses too quickly in the upper region, then productivity increases, but the reaction does not progress uniformly throughout the raw material
Solution Approach 1:
The reaction shaft is divided into different reaction zones served by different gas pathways. The first gas pathway serves the upper region with main blow for rapid reaction initiation, while the second gas pathway serves the lower region with auxiliary gas to ensure continued reaction progress and uniformity throughout the entire raw material charge.
Solution Approach 2:
The multiple gas pathways ensure continuous reaction promotion throughout the reaction shaft. The first gas pathway initiates rapid reaction in the upper region, while the second gas pathway maintains reaction progress in the lower region, ensuring continuous and uniform reaction action throughout the entire raw material from start to finish.
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
The revolved flow promotes better contact between the raw material and reaction gases, increasing reaction efficiency and uniformity, and extending the residence time of the gas flow to enhance reaction progression.
Implementation Method 1
a blade (43) that is provided in the first gas pathway (14), has an inclined face (431) with which the first gas is collided and revolves the first gas toward a lower side of the flash smelting furnace
Implementation Method 2
The revolved flow promotes better contact between the raw material and reaction gases, increasing reaction efficiency and uniformity
Implementation Method 3
the raw material is instantly oxidized and melted by oxidation heat of the raw material
Implementation Method 4
the raw material is instantly oxidized and melted by oxidation heat of the raw material
Data Source
AI summary
A raw material supply device that supplies a raw material into a flash smelting furnace and supplies first gas and second gas into the flash smelting furnace, includes: a first gas pathway that is provided in a lance and supplies the first gas into the flash smelting furnace; a raw material pathway that is provided out of the lance and supplies the raw material into the flash smelting furnace; a second gas pathway that is provided out of the raw material pathway and supplies the second gas into the flash smelting furnace; and a blade that is provided in the first gas pathway, has an inclined face with which the first gas is collided and revolves the first gas toward a lower side of the flash smelting furnace, the inclined face being inclined with respect to a flow direction of the first gas in the first gas pathway.