Cyclic Titanium Sponge Production via Potassium Fluotitanate
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Solution Overview
Problem
Conventional methods for preparing titanium sponge using titanium tetrachloride as an intermediate material involve complex processes, high temperature requirements, long production cycles, high costs, and environmental pollution due to the use of chlorine gas.
Innovation Solution
A method utilizing potassium fluotitanate as an intermediate material, involving reactions with hydrofluoric acid and potassium sulphate to form potassium fluotitanate, followed by a thermic reduction process with aluminium to produce titanium sponge and potassium cryolite, which is then recycled to regenerate the intermediate material, eliminating the need for chlorine gas and melting electrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If titanium tetrachloride is used as intermediate material with magnesium or sodium thermic reduction, then titanium sponge can be produced, but the process becomes complex and requires high temperature conditions
Solution Approach 1:
The patent uses potassium fluotitanate as an intermediary material to replace the conventional titanium tetrachloride intermediate. This intermediary undergoes a simpler thermic reduction reaction with aluminium at lower temperatures (780-850°C) compared to the conventional Kroll or Hunter processes, thereby simplifying the overall process while maintaining reliable titanium sponge production
Solution Approach 2:
The patent changes the temperature parameter from high temperature (1700-1800°C for reducing smelting or 1000°C for chlorinated melting) to a lower temperature range (780-850°C for the thermic reduction of potassium fluotitanate). This parameter change simplifies the process conditions and reduces equipment requirements while achieving the same production goal
2Reliability
If conventional titanium sponge preparation methods are used, then titanium sponge can be obtained, but the production cycle becomes long
Solution Approach 1:
The patent implements a cyclic process where the coproduct potassium cryolite is regenerated back into potassium fluotitanate intermediate material and reused in the same thermic reduction process. This continuous cycle eliminates the need for separate intermediate material production steps, thereby shortening the overall production cycle while maintaining reliable titanium sponge production
Solution Approach 2:
The coproduct potassium cryolite from the thermic reduction process serves itself by being regenerated back into the intermediate material potassium fluotitanate, which is then reused in the same process. This self-service mechanism eliminates external material inputs and reduces production time by integrating the coproduct management into the main production flow
3Reliability
If titanium tetrachloride is used as intermediate material, then titanium sponge can be prepared, but production cost becomes high
Solution Approach 1:
Instead of discarding the coproduct from the thermic reduction process, the patent recycles it by regenerating potassium cryolite back into potassium fluotitanate intermediate material. This recovery and reuse of materials eliminates the need to purchase expensive intermediate materials like titanium tetrachloride, thereby reducing production costs while maintaining reliable titanium sponge production
Solution Approach 2:
The patent establishes a feedback loop where the coproduct potassium cryolite is fed back into the process after being regenerated back into potassium fluotitanate. This feedback mechanism ensures continuous utilization of materials within the system, reducing waste and lowering the overall production cost while maintaining consistent product quality
4Reliability
If chlorine gas is used in the conventional process, then titanium sponge can be produced, but environmental pollution occurs
Solution Approach 1:
The patent extracts and eliminates the harmful chlorine gas step from the conventional titanium sponge production process. By using potassium fluotitanate as the intermediate material instead of titanium tetrachloride, the process completely removes the need for chlorine gas handling, thereby preventing environmental pollution while maintaining reliable titanium sponge production
Solution Approach 2:
The patent converts the coproduct that would normally be waste into a valuable intermediate material by regenerating potassium cryolite back into potassium fluotitanate. This transformation turns a potential harmful byproduct into a beneficial resource, eliminating the need for harmful chlorine gas while maintaining efficient titanium sponge production
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 simplifies the process, reduces production costs, shortens the cycle, and minimizes environmental pollution by using a more benign chemical route, achieving efficient and cyclic resource regeneration with potassium cryolite as a valuable coproduct.
Implementation Method 1
adding hydrofluoric acid to titaniferous iron concentrate to enable a reaction at a temperature of between 100 and 200 DEG C to form fluotitanic acid
Implementation Method 2
heating the reactor to a temperature of between 780 and 850 DEG C, adding aluminium in the reactor and stirring quickly to enable a reaction for 4 to 6 hours to form the titanium sponge and potassium cryolite
Implementation Method 3
crushing and sending it to a rotary reaction kettle quantificationally together with concentrated sulphuric acid to enable a reaction at a temperature of between 400 and 500 DEG C to form hydrogen fluoride gas and the solid mixture of potassium sulphate and aluminium potassium sulphate; collecting the hydrogen fluoride gas and dissolving it into water to obtain a hydrofluoric acid aqueous solution
Data Source
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AI summary
The disclosure discloses a method for cyclically preparing titanium sponge and coproducing potassium cryolite using potassium fluotitanate as an intermediate material, which includes the following steps: A) adding hydrofluoric acid to titaniferous iron concentrate to enable a reaction to form fluotitanic acid; B) adding potassium sulphate to the fluotitanic acid to enable a reaction to form the potassium fluotitanate; C) putting the potassium fluotitanate into a reactor, adding aluminium to react with the potassium fluotitanate to form the titanium sponge and potassium cryolite; or, putting the aluminium into the reactor, adding the potassium fluotitanate to react with the aluminium to form the titanium sponge and potassium cryolite; D) extracting the potassium cryolite and sending it to a rotary reaction kettle together with concentrated sulphuric acid to enable a reaction to form hydrogen fluoride gas and potassium sulphate, aluminium potassium sulphate; collecting the hydrogen fluoride gas and dissolving it into water to obtain a hydrofluoric acid aqueous solution; E) recycling the obtained hydrofluoric acid aqueous solution to Step A to leach the titaniferous iron concentrate. The disclosure can recycle the coproduct potassium cryolite, thereby shortening the process of preparing titanium sponge, reducing the comprehensive cost of production, improving the production efficiency and reducing environmental pollution.