Adjustable-Discharge Grinding Disc Assembly for Low-Heat Sizing

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Solution Overview

Problem

Conventional grinding devices for solid minerals experience inaccurate size control, frequent coarse sizes, and temperature-related inaccuracies due to metal collisions, leading to energy waste and compromised test results.

Innovation Solution

A solid material grinding device with adjustable discharge size, featuring a movable and stationary grinding disc with a clearance fit, uses rectifying blowers to prevent metal collisions and control grinding clearance, ensuring stable particle properties and accurate sizing through a semi-fluidized grinding process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional crushing devices (gyratory crusher, cone crusher, jaw crusher, collision-type crusher) are used to grind solid minerals, then the material can be crushed into fine particles, but metal collisions cause heat, vibration, and large noise, resulting in waste of input energy and temperature rise that affects the physicochemical characteristics of mineral particles

Engineering Contradiction:

Improvegrinding efficiencyVSAvoidenergy utilization efficiency

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent replaces the conventional mechanical collision-based grinding system with a fluidized bed grinding system where air flow suspends and transports particles, eliminating metal-on-metal collisions. The grinding occurs through particle-particle interactions in a fluidized state, substituting mechanical impact with aerodynamic forces and reducing energy loss to heat and vibration.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention uses pneumatic principles by introducing air flow into the grinding chamber to fluidize the mineral particles. The air suspension system enables particles to be lifted, transported, and ground without direct contact with metal surfaces, utilizing gas pressure and flow to control the grinding process and reduce energy waste.

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Manufacturing precision

If conventional crushing devices are used for long-time grinding, then fine particle size can be achieved, but high temperature has a certain impact on the physicochemical characteristics of mineral particles, affecting the accuracy of test results

Engineering Contradiction:

Improveparticle size control accuracyVSAvoidtemperature rise

Core Design Contradiction:

Manufacturing precisionVSTemperature

Solution Approach 1:

By replacing mechanical collision grinding with fluidized bed grinding, the patent eliminates the primary heat generation mechanism. The aerodynamic suspension and gentle particle-particle grinding reduce frictional heating and impact heating, maintaining lower temperatures throughout the grinding process and preserving the thermosensitive physicochemical characteristics of mineral particles.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If conventional grinding devices are used, then material can be processed, but the device has inaccurate size control and frequent occurrence of coarse sizes, unable to meet subsequent use requirements

Engineering Contradiction:

Improveprocessing capacityVSAvoiddischarge size accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent employs dynamic control of the fluidized bed system, adjusting air flow rates, particle suspension height, and residence time to optimize grinding conditions. This dynamic adjustment enables precise control over particle size distribution, ensuring consistent fine particle output without coarse sizes while maintaining high processing capacity.

Inventive Principle:

Principle #15Dynamics

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 device achieves higher energy utilization efficiency, stable mineral particle properties, and precise size control by minimizing temperature rise and collisions, enhancing the accuracy of grinding results.

Implementation Method 1

The top rectifying blower and the side edge rectifying blower respectively blow gas from an upward side and a lateral side of the movable grinding disc and the stationary grinding disc along a radial direction of the movable grinding disc and the stationary grinding disc. The central rectifying blower blows gas to the center of the stationary grinding disc along an axial direction of the movable grinding disc and the stationary grinding disc.

Methodology Applied

Scientific EffectGas flow:

Data Source

PatentUS12434248B2Solid material grinding method and device with adjustable discharge size

Publication Date: 2025.10.07 INFINITY INTELLIGENCE & INFORMATION (SUZHOU) TECH CO LTD

AI summary

A solid material grinding method and device with an adjustable discharge size includes a grinding disc housing, and a movable grinding disc and a stationary grinding disc provided in a grinding disc cavity of the grinding disc housing coaxially with grinding surfaces opposite to each other. The movable grinding disc is driven to rotate in the grinding disc housing, thereby grinding materials between the movable grinding disc and the stationary grinding disc. The movable grinding disc is further connected to a pushing mechanism, and the pushing mechanism adjusts the distance between the movable grinding disc and the stationary grinding disc in a push-and-pull manner. A top rectifying blower and a side edge rectifying blower respectively blow gas from an upward side and a lateral side of the movable grinding disc and the stationary grinding disc. A central rectifying blower blows gas to the center of the stationary grinding disc.