Titanium Extraction by Direct Reduction of Lower-Grade Ores
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Solution Overview
Problem
Conventional methods for extracting titanium from ores are costly, inefficient, and environmentally harmful due to the use of hazardous chemicals like titanium tetrachloride and the generation of greenhouse gases, and are limited to high concentration/low impurity ores.
Innovation Solution
A method involving a chemical blend of titanium-bearing ore and a reducing agent, heated at a controlled rate to a specific temperature for a duration, followed by separation of titanium product from slag, using a reducing agent like aluminum and viscosity agents like calcium fluoride, without titanium tetrachloride, to extract titanium from lower-grade ores.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods using titanium tetrachloride are used, then titanium extraction can be achieved, but hazardous chemicals are used and greenhouse gases are generated
Solution Approach 1:
The patent removes titanium tetrachloride and other hazardous chemicals from the extraction process, replacing them with a reducing agent-based system that uses aluminum or calcium to reduce titanium oxide directly, eliminating the need for corrosive intermediaries and their associated environmental hazards
Solution Approach 2:
The patent changes the chemical parameters of the extraction process by using a different chemical pathway - instead of the traditional chlorination route involving TiCl4, it employs direct reduction of TiO2 with aluminum or calcium at controlled temperatures (1000-2000°C), fundamentally altering the reaction chemistry to eliminate harmful byproducts
2Ease of manufacture
If conventional methods are used, then titanium extraction is possible, but the process is costly and inefficient
Solution Approach 1:
The patent performs preliminary classification of titanium-bearing ores to identify suitable feedstocks containing TiO2, CaO, and Al2O3 in appropriate ratios, preparing the material beforehand to ensure optimal reaction conditions and eliminate the need for expensive purification steps later in the process
Solution Approach 2:
The patent creates a self-sustaining extraction process where the reduction reaction between titanium oxide and the reducing agent (aluminum or calcium) generates sufficient heat to maintain the reaction temperature, reducing external energy requirements and operational costs
3Manufacturing precision
If conventional methods are used, then high purity titanium can be obtained, but only from high concentration/low impurity ores
Solution Approach 1:
The patent develops a universal extraction method that can process multiple types of titanium-bearing ores (ilmenite, rutile, slag, concentrates) with varying TiO2 concentrations (30-90%) and impurity levels, making the process adaptable to diverse feedstocks that conventional methods cannot handle
Solution Approach 2:
The patent adjusts key process parameters including temperature (1000-2000°C), holding time (1-24 hours), and reducing agent to titanium oxide weight ratio (0.5-2.0) based on the specific ore composition and desired titanium purity, enabling flexible processing of ores with varying impurity levels
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 achieves high yields of titanium metal (>85%) from a wide range of titanium-bearing ores with varying impurities, reducing the use of hazardous chemicals and greenhouse gas emissions.
Implementation Method 1
heating the chemical blend to initiate an extraction reaction, wherein the chemical blend is heated at a ramp up rate between 1° C. to 50° C./min
Implementation Method 2
mixing a chemical blend comprising the titanium-bearing ore and a reducing agent, wherein a ratio of the titanium-bearing ore to the reducing agent corresponds to a weight ratio of titanium oxide component in the titanium-bearing ore:reducing metal in the reducing agent of 0.9 to 2.4
Implementation Method 3
separating a titanium product from a residual slag
Data Source
AI summary
A method to extract and refine metal products from metal-bearing ores, including a method to extract and refine titanium products. Titanium products can be extracted from titanium-bearing ores with TiO2 and impurity levels unsuitable for conventional methods.