GB/T 17445-2022 Cast grinding balls
1 Scope
This document specifies the grades and codes, technical requirements, test methods, inspection rules, marking, certificate, packaging and transport of chromium alloy white cast iron grinding balls and ductile iron grinding balls for drum mills.
This document is applicable to chromium alloy white cast iron grinding balls and ductile iron grinding balls (hereinafter referred to as "grinding balls") used for crushing and grinding related materials such as ore, coal and cement in metallurgy, electric power, building materials and chemical industries.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane phosphomolybdic acid gravimetric method for the determination of phosphorus content
GB/T 223.4 Iron, steel and alloys - Determination of manganese content - Potentiometric titration or visual titration method
GB/T 223.11 Iron, steel and alloys - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - The sodium thiosulfate separation iodometric method for the determination of copper content
GB/T 223.23 Iron, steel and alloys - Determination of nickel content - Dimethylglyoxime spectrophotometric method
GB/T 223.26 Iron, steel and alloys - Determination of molybdenum content - Thiocyanate spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium periodate (potassium) photometric method for the determination of manganese content
GB/T 223.71 Methods for chemical analysis of iron, steel and alloys - The gravimetric method for the determination of carbon content after combustion in a tubular furnace
GB/T 223.72 Iron, steel and alloys - Determination of sulfur content - Gravimetric method
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test methods
GB/T 5611 Foundry terminology
GB/T 5612 Representation of cast iron grades
GB/T 8170 Revision rules of numerical value and representation and judgment of limit numerical value
GB/T 9441-2009 Metallographic examination of ductile iron
GB/T 20066 Sampling and preparation methods of samples for determination of chemical composition of steel and iron
GB/T 24234 Cast iron - Determination of multi-element content - Spark discharge atomic emission spectrometry (conventional method)
3 Terms and definitions
For the purpose of this document, the following terms and definitions and those defined in GB/T 5611 apply.
3.1
chromium alloy white cast iron grinding ball
grinding balls cast from white cast iron with chromium as the main alloying element
3.2
ductile iron grinding ball
grinding balls cast by ductile iron
3.3
breakage ratio of ball
percentage of total weight of broken balls to total weight of used balls.
Note: Broken ball refers to the grinding ball whose broken area exceeds 1/3 of the surface area of the grinding ball in the normal production operation of the mill.
3.4
impact fatigue life of grinding ball
number of impacts that the grinding ball withstands when it fails due to impact fatigue as determined in the falling ball test
3.5
ball consumption
total weight of grinding balls consumed for crushing and grinding each ton of material during the normal production operation of the mill
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Grades and codes
5 Technical conditions
6 Test methods
7 Inspection rules
8 Marking, certificate, packaging and transport
Annex A (Nominative) Test method for impact fatigue life of grinding ball
Annex B (Normative) Determination and calculation of breakage ratio of ball
Annex C (Nominative) Calculation of cast grinding ball consumption
GB/T 17445-2022 Cast grinding balls
1 Scope
This document specifies the grades and codes, technical requirements, test methods, inspection rules, marking, certificate, packaging and transport of chromium alloy white cast iron grinding balls and ductile iron grinding balls for drum mills.
This document is applicable to chromium alloy white cast iron grinding balls and ductile iron grinding balls (hereinafter referred to as "grinding balls") used for crushing and grinding related materials such as ore, coal and cement in metallurgy, electric power, building materials and chemical industries.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane phosphomolybdic acid gravimetric method for the determination of phosphorus content
GB/T 223.4 Iron, steel and alloys - Determination of manganese content - Potentiometric titration or visual titration method
GB/T 223.11 Iron, steel and alloys - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - The sodium thiosulfate separation iodometric method for the determination of copper content
GB/T 223.23 Iron, steel and alloys - Determination of nickel content - Dimethylglyoxime spectrophotometric method
GB/T 223.26 Iron, steel and alloys - Determination of molybdenum content - Thiocyanate spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium periodate (potassium) photometric method for the determination of manganese content
GB/T 223.71 Methods for chemical analysis of iron, steel and alloys - The gravimetric method for the determination of carbon content after combustion in a tubular furnace
GB/T 223.72 Iron, steel and alloys - Determination of sulfur content - Gravimetric method
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test methods
GB/T 5611 Foundry terminology
GB/T 5612 Representation of cast iron grades
GB/T 8170 Revision rules of numerical value and representation and judgment of limit numerical value
GB/T 9441-2009 Metallographic examination of ductile iron
GB/T 20066 Sampling and preparation methods of samples for determination of chemical composition of steel and iron
GB/T 24234 Cast iron - Determination of multi-element content - Spark discharge atomic emission spectrometry (conventional method)
3 Terms and definitions
For the purpose of this document, the following terms and definitions and those defined in GB/T 5611 apply.
3.1
chromium alloy white cast iron grinding ball
grinding balls cast from white cast iron with chromium as the main alloying element
3.2
ductile iron grinding ball
grinding balls cast by ductile iron
3.3
breakage ratio of ball
percentage of total weight of broken balls to total weight of used balls.
Note: Broken ball refers to the grinding ball whose broken area exceeds 1/3 of the surface area of the grinding ball in the normal production operation of the mill.
3.4
impact fatigue life of grinding ball
number of impacts that the grinding ball withstands when it fails due to impact fatigue as determined in the falling ball test
3.5
ball consumption
total weight of grinding balls consumed for crushing and grinding each ton of material during the normal production operation of the mill
Contents of GB/T 17445-2022
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Grades and codes
5 Technical conditions
6 Test methods
7 Inspection rules
8 Marking, certificate, packaging and transport
Annex A (Nominative) Test method for impact fatigue life of grinding ball
Annex B (Normative) Determination and calculation of breakage ratio of ball
Annex C (Nominative) Calculation of cast grinding ball consumption
