Non-Thermal Plasma Reduction of Ore Ultrafines Without Agglomeration

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Solution Overview

Problem

The steel industry's carbon dioxide emissions, particularly from blast furnaces, are significant contributors to global carbon dioxide emissions, and existing technologies for processing ultrafine ore particles require high temperatures and energy inputs, limiting efficiency and effectiveness.

Innovation Solution

A low-temperature, direct-reduction process using a solid-state microwave-powered non-thermal hydrogen plasma jet in a fluidized bed to reduce ultrafine ore particles, eliminating metallurgical coke and replacing it with hydrogen plasma as a carbon-free reductant, while utilizing plasma-enhanced fluidized beds and cyclonic separators for beneficiation and gangue removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-generated harmful factors

If conventional high-temperature blast furnace processes are used for ore reduction, then reduction effectiveness is achieved, but carbon dioxide emissions increase significantly

Engineering Contradiction:

Improvecarbon dioxide emissionsVSAvoidreduction effectiveness

Core Design Contradiction:

Object-generated harmful factorsVSProductivity

Solution Approach 1:

The patent changes the fundamental parameters of the reduction process by using non-thermal plasma at low temperatures instead of high-temperature thermal processes. This parameter change enables carbon-free reduction while maintaining effectiveness through plasma-activated hydrogen and reactive species

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the thermal/mechanical blast furnace system with a plasma-based chemical reduction system. Microwave-powered non-thermal plasma generates reactive hydrogen species that reduce iron oxide through chemical reactions rather than thermal processes, eliminating CO2 emissions

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If high temperatures are applied for ore particle reduction, then reduction rate increases, but energy input requirements increase

Engineering Contradiction:

Improvereduction rateVSAvoidenergy input

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent fundamentally changes the energy delivery parameter from thermal heating to non-thermal plasma activation. Microwave energy directly activates hydrogen molecules to create reactive species that drive reduction at low temperatures, maintaining high reduction rates without high thermal energy input

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent substitutes thermal energy transfer with plasma chemistry. Instead of heating particles to high temperatures, microwave-powered plasma generates reactive hydrogen atoms and ions that chemically reduce iron oxide at ambient or low temperatures, dramatically reducing energy consumption

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If thermal plasma processes are used for ultrafine ore processing, then reduction capability is achieved, but particle agglomeration occurs

Engineering Contradiction:

Improvereduction capabilityVSAvoidparticle dispersion

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent changes the thermal parameter to non-thermal conditions, using room temperature or low temperature plasma processing. This prevents the thermal agglomeration that occurs in high-temperature processes while maintaining reduction capability through plasma-activated chemistry

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces thermal processing with plasma chemistry processing. The reduction occurs through reactive species from non-thermal plasma rather than heat, eliminating the mechanism that causes particle fusion and agglomeration while maintaining ultrafine particle dispersion

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 process achieves a zero-carbon, energy-efficient method for producing high-quality iron, reduces energy inputs, and enables the direct reduction of low-grade ores, allowing for automatic gangue separation and integration with steel mills, while minimizing agglomeration and maintaining a solid phase during reduction.

Implementation Method 1

applying, within the reduction reaction zone, a non-thermal plasma to the ultrafines

Methodology Applied

Scientific EffectPlasma: Plasma

Implementation Method 2

direct reduction of ultrafines using an integrated system including an ultrafines source and a non-thermal plasma source

Methodology Applied

Scientific EffectChemical reduction: Reduction

Implementation Method 3

solid-state microwave-powered non-thermal hydrogen plasma jet

Methodology Applied

Scientific EffectMicrowave radiation: Microwave Radiation

Implementation Method 4

delivering ultrafines to a reduction reaction zone

Methodology Applied

Scientific EffectFluidization: Fluidisation

Data Source

PatentUS20260071289A1Non-thermal plasma direct reduction of ore ultrafines

Publication Date: 2026.03.12 STARFIRE IND LLC

AI summary

A method and system for carrying out non-thermal plasma direct reduction of ore ultrafines into resource material are described. In particular, the present invention is directed to a method for direct reduction of ultrafines using an integrated system including an ultrafines source and a non-thermal plasma source. The method includes delivering ultrafines to a reduction reaction zone; and applying, within the reduction reaction zone, a non-thermal plasma to the ultrafines.