Cast Grinding Balls Standard GB/T 17445-2022 | Official Document

Download the official Cast Grinding Balls Standard (GB/T 17445-2022) for cast grinding media used in mining and milling operations (PDF).

File Size: 3.3 MB | Format: PDF | Pages: 15 | Status: Current (Replaces GB/T 17445-2009)

GB/T 17445-2022 Cast Grinding Balls Standard PDF — Download the official GB/T 17445-2022 Standard for Cast Grinding Balls (PDF).

About the Cast Grinding Balls Standard

This document, GB/T 17445-2022, specifies the technical requirements, classification, testing methods, and inspection rules for cast grinding balls used in drum mills. It applies to chromium alloy white iron and ductile iron grinding balls utilized in industries such as mining, cement, and coal preparation.

The standard was released on March 9, 2022, and became effective on October 1, 2022. It was published by the China Standards Press and is the authoritative reference for quality control and procurement in the grinding media industry.

Key Technical Changes in the 2022 Revision

This updated edition introduces several critical modifications to improve quality and performance:

Revised Composition Limits: Adjusted upper limits for carbon and lower limits for manganese in chromium alloy white cast iron to enhance material consistency.
New Grade Additions: Introduced specifications for carbide ductile iron grinding balls, expanding the range of available media for specific applications.
Stricter Purity Controls: Lowered phosphorus content limits for specific grades (ZQCr8, ZQCr5) to ensure higher material purity and wear resistance.
Updated Nomenclature: Modified the designation method for nodular cast iron grinding balls to align with modern classification practices.

Detailed Document Contents

The standard is structured to provide comprehensive guidance for manufacturers and users:

Sections: Scope, Normative References, Terms & Definitions, Grades & Codes, Technical Requirements, Test Methods, Inspection Rules, Marking, Certificate, Packaging & Transport.
Appendices: Includes normative appendices for impact fatigue life testing, shatter rate calculation, and ball consumption calculation.
Tables: Detailed data on diameter tolerances, chemical composition limits, and surface hardness requirements.

Target Audience

Grinding Media Manufacturers: Essential for ensuring product compliance and quality certification.
Plant Operators & Procurement Managers: Crucial for verifying the quality of purchased media in mining and cement plants.
Quality Control Engineers: Provides the benchmark for testing and inspecting incoming grinding media.

[Download: GB_T_17445_2022_Cast_Grinding_Balls_Standard.pdf]

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