Some standard content:
National Standard of the People's Republic of China
Ferroalloys--Vocabulary
This standard refers to the international standard ISO89541990 Ferroalloy Vocabulary". 1 Subject content and scope of application
CB/T14984-94wwW.bzxz.Net
This standard specifies the terms related to ferroalloy products, sampling and sample preparation for ferroalloy analysis, and ferroalloy screening. This standard applies to ferroalloy technical requirements, delivery conditions, sampling and sample preparation and screening. 2 Reference standards
GB/T13247 Sampling and testing methods for particle size of ferroalloy products 3 Products
3.1 General terms
3.1.1 Ferroalloyferroelloy
Alloys composed of not less than 4% iron and one or more (including one) metal or non-metallic elements, used as alloying additives, deoxidizers, desulfurizers and denaturants in the steel and foundry industries. Note: Metallic manganese and vanadium pentoxide are not ferroalloys by definition, but people usually include these products in the category of ferroalloys. 3.1.2 Alloy additivesalloy additives are ferroalloys used to obtain the desired (controllable) melt composition. 3.1.3 Deoxidizer
Ferroalloys used to reduce the oxygen content in metals that need to be deoxidized. 3.1.4 Desulfurizer
Ferroalloy used to reduce the sulfur content in the metal to be desulfurized. 3.1.5 Modifier
Ferroalloy added with a small amount of this substance to change the properties of non-metallic elements and (or) impurities and metal structure to change the properties of the metal.
3.1.6 Designation
is a code commonly used for ferroalloys of a given composition, consisting of Chinese phonetic letters, chemical element symbols and Arabic numerals. Chinese phonetic letters are used to indicate the process and product characteristics of ferroalloy products: chemical element symbols are used to indicate the elements in ferroalloy products. Arabic numerals are used to indicate the percentage content of the element. 3.1.7 Precision β precision
is the maximum estimated allowable error of the average value of a typical quality characteristic, expressed as twice the standard deviation (α) (percentage) of this characteristic, β=20. 3.1.8 Overall precision βsnmoverall precision The estimated overall precision of typical quality characteristics of the delivery batch (PsDm=20sm) is composed of sampling precision (9g=20s), sample preparation precision (3m--2mm) and test analysis precision (3m--20m), βacm-V+product+resistance 3.2 Ferroalloy products 3.2.1 Ferrosilicon Ferrosilicon An alloy of iron and silicon with a silicon content ranging from 8.0% to 95.0%. 3.2.2 Ferromanganese Ferromanganese An alloy of iron and manganese with a manganese content ranging from 65.6% to 90.0%. 3.2.2.1 Low carbon ferromanganese Low carbon Ferromanganese with a carbon content of not more than 0.7%.
3.2.2.2 Medium carbon ferromanganese Ferromanganese with a carbon content of more than (1.7% to 2.0%). 3.2.2.3 High carbon ferromanganese Ferromanganese with a carbon content of more than 2.0% to 8.0% 3.2.3 Blast furnace ferromanganese blasi 3.2.5.1 Ferrochromium Extra low carbon Ferrochromium with a carbon content of no more than 0.15%.
3.2.5.2 Ferrochromium Low carbon Ferrochromium with a carbon content of more than 0.15% to 0.50%. 3.2.5.3 Ferrochromium Medium 3.2.5.4 Ferrochromium high carbon Ferrochromium high carbon Ferrochromium with a carbon content of more than 41.0% to 10.0%. 3.2.6 Ferrochromium vacuum extra low carbon Ferrochromium smelted by vacuum solid decarburization method: its carbon content is not more than 0.100%. 3.2.7 Ferrochromium nitrogen 3.2.8 Ferrochromium containing not less than 3.0% nitrogen and not less than 60.0% chromium. 3.2.9 Ferrotungsten containing not less than 70.0% to 85.0% tungsten. 3.2.10 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.11 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.12 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.13 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.14 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.15 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.16 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.17 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.18 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.19 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.20 Ferroaluminum containing not less than 30.0% chromium and not less than 35.0% silicon. 3.2.21 |An alloy of iron and molybdenum containing between 55.0% and 75.0% molybdenum. ferrovanalium
An alloy of iron and vanadium containing between 35.0% and 85.0% vanadium. 3.2.12
ferrotitanium
An alloy of iron and titanium containing between 20.0% and 75.0% titanium. 3.2.13ferroniobium
An alloy of iron and tantalum containing between 50% and 80% niobium. 3.2.14 Molybdenum oxide briquets GE/T 14984-94
Molybdenum oxide briquettes containing not less than 48.0% molybdenum 3.2.15 Ferrosilicocalcium Alloys of iron, silicon and calcium with a silicon content of 40% to 65% and a calcium content of 8% to 35%. 3.2.16 Ferroboron
Alloys of iron and boron with a boron content of 4.0% to 24.0%. 3.2.16.1 Feroboron low carbon Ferroboron with a carbon content of not more than 0.1%.
3.2.16-2 Ferroboron medium carbon Ferroboron with a carbon content of 0.1% to 2.5%. 3.2.17 Ferrophosphorus
Alloy of iron and phosphorus with a phosphorus content ranging from 15.0% to 25.0%. 3.2.18 Metal manganeseMetal with a manganese content of not less than 93.5%.
Metal chromium
Metal with a chromium content of not less than 98.0%.
Rare earth ferrosiliconFerrosilicon alloys with a rare earth content ranging from 20.0% to 47.0%. Rare earth magnesium ferrosilicon alloys3.2.21
Ferrosilicon alloys with a rare earth content ranging from 4.0% to 23.0% and a magnesium content ranging from 7.0% to 15.0%. 3.2.22 Vanadium aluminum alloy: An alloy of iron, silver and aluminum with a vanadium content ranging from 50.0% to 90.0% and an aluminum content of not less than 9.0%. 3.2.23 Mn-Nb-Falloy: An alloy of iron, vanadium and manganese with a vanadium content ranging from 10% to 18% and a manganese content ranging from 20% to 60%. 3.2.24 Vanadium pentoxide: Products with a vanadium pentoxide content of not less than 97.0%. 4 Sampling and sample preparation
4.1 Sampling
The process of sampling.
4.2 consignment
A certain amount of ferroalloy delivered at one time, with the same production and process, and with chemical composition and particle size composition within a certain range, and with a corresponding ferroalloy quality certificate.
4.3 tapped lot
A batch of alloys from a furnace.
4.4 tapped lot
A batch of ferroalloys of the same grade and group from several furnaces. 4.5 representative quality characteristic representative quality characteristic The content or particle size composition of an element (or elements) that determines the sampling parameters and the value of the ferroalloy. 4.6 sample
A portion of ferroalloy taken from a batch of ferroalloys and representing its characteristics. 4.7 increment
A certain amount of ferroalloy taken from a supply batch or a package at one time by a sampling device or manual picking, or a certain amount of ferroalloy obtained by the method of incremental sampling. GB/T 14984-94
4.8 Subsample snbsample
A mixture of two or more subsamples taken from a part of the ferroalloy supplied in a batch. 4.9 Gross sample
A mixture of all subsamples or subsamples taken from a ferroalloy supplied in a batch. 4.10 Manual sampling
Manual sampling by picking up or twisting a sampling tool (sampling spade or sampling needle). 4.11 Mechanical sampling mechanical sampling by mechanical sampling device.
4.12 Random sampling
A method of sampling by which each part of the ferroalloy has the same probability. 4.13 Systematic sampling Sygtematic sampling is a practical sampling method that takes samples at specified intervals according to product number, time or location. The first sample is randomly taken in the first interval.
4.14 Two-stage sampling Two-stage sampling is a practical two-stage random sampling method. In the first stage, the basic sampling pieces (i.e. packages or part of the delivery batch) are selected; in the second stage, a number of samples (secondary samples) are randomly taken from each of the selected basic sampling pieces. 4.15 Sample preparation The process of preparing a test sample for determining the value of a quality characteristic. This process includes sample reduction, crushing, mixing and sometimes pre-drying. These operations can be carried out in several stages.
4.16 Division The process of reducing the sample size according to regulations in order to obtain the sample size required for a test sample. 4.17 Divided sample The sample obtained by the division method.
4.18 Test sample
A sample prepared for the purpose of determining the chemical composition or particle size distribution. It is prepared from each portion, subsample or bulk sample in the manner specified for the sample type.
4.19 Size sample
A sample taken to determine the particle size distribution of a delivery batch or part of a delivery batch. 5 Sieving
5.1 Particle
An individual agglomerate of a ferroalloy.
5.2 Size range (in sieve analysis) Size range is defined by the smallest sieve hole through which a batch of ferroalloy particles can pass and the largest sieve hole through which the particles cannot pass.
5.3 Maximum particle size A length measure of the size of an alloy particle, usually expressed as the square sieve hole through which 100% of the ferroalloy pieces pass or as a ruler with a square hole.
Note: GB/T13247-91 Sampling and Testing Methods for Ferroalloy Product Particle Size stipulates that the side length of various ferroalloy product particle sizes in one direction should not exceed 1.5 times the maximum limit value.
5.4 Nominal top size The maximum value of the particle size range specified in the standards and technical requirements for delivery conditions of various types of ferroalloys. 5.5 Nominal lowergize CB/T 14984-94
The minimum value of the particle size range specified in the standards and technical requirements for delivery conditions of various types of ferroalloys. 5.6 Size fraction
The process of screening the test sample with a double-layer sieve with an aperture of Xm and Ymm (where X>Y) or a single-layer sieve with an aperture of Xm (or Ymm). Screening with a double-layer sieve is marked as -Xmm+Ym, and screening with a single-layer sieve is marked as +Xmm or -Xmm (+Ym or -Ym). 5.7 oversize
the material that cannot pass through the sieve with the maximum limit value Xm, usually expressed as +X. 5.8 undersize
the material that can pass through the sieve with the minimum limit value Ymm, usually expressed as -Ym. 5.9 size distribution
the quantitative grouping of sample particles according to their size, which is expressed as the percentage of the amount passing or remaining on the selected sieve to the total amount of the sample. 5.10 sieving
the process of separating ferroalloys according to the smallest particle size using one or more sieves. hand sieving
the operation of manually supporting and shaking a sieve (or multiple sieves). 5.12 assisted hand sieving the operation of mechanically supporting but manually shaking a sieve (or multiple sieves). 5.13 mechanical sieving the operation of mechanically supporting and shaking a sieve (or multiple sieves). 5.14 Hand placing
The ferroalloy particles (lumps) left on the sieve after screening are manually sorted so that the particles (lumps) can be clearly classified as much as possible. Additional remarks:
This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgy. This standard is drafted by Jilin Ferroalloy Plant, Information Standards Research Institute of the Ministry of Metallurgical Industry, and Shanghai Ferroalloy Plant. The main drafters of this standard are Shu Li, Jiang Chunzang, Fu Yongxin, and Chen Huohua. The level of this standard is marked as GB/T14984-94113 Systematic sampling Sygtematic sampling is a practical sampling method that takes samples at specified intervals according to product number, time or location. The first sample is randomly taken in the first interval.
4.14 Two-stage sampling Two-stage sampling is a practical two-stage random sampling method. In the first stage, the basic sampling pieces (i.e. packages or part of the delivery batch) are selected; in the second stage, a number of samples (secondary samples) are randomly taken from each of the selected basic sampling pieces. 4.15 Sample preparation
The process of preparing a test sample for determining the value of a quality characteristic. This process includes sample reduction, crushing, mixing and sometimes pre-drying. These operations can be carried out in several stages.
4.16 Division
The process of reducing the sample size according to regulations in order to obtain the sample size required for a test sample. 4.17 Divided sample
The sample obtained by the division method.
4.18 Test sample
A sample prepared for the purpose of determining the chemical composition or particle size distribution. It is prepared from each portion, subsample or bulk sample in the manner specified for the sample type.
4.19 Size sample
A sample taken to determine the particle size distribution of a delivery batch or part of a delivery batch. 5 Sieving
5.1 Particle
An individual agglomerate of a ferroalloy.
5.2 Size range (in sieve analysis) Size range is defined by the smallest sieve hole through which a batch of ferroalloy particles can pass and the largest sieve hole through which the particles cannot pass.
5.3 Maximum particle size A length measure of the size of an alloy particle, usually expressed as the square sieve hole through which 100% of the ferroalloy pieces pass or as a ruler with a square hole.
Note: GB/T13247-91 Sampling and Testing Methods for Ferroalloy Product Particle Size stipulates that the side length of various ferroalloy product particle sizes in one direction should not exceed 1.5 times the maximum limit value.
5.4 Nominal top size The maximum value of the particle size range specified in the standards and technical requirements for delivery conditions of various types of ferroalloys. 5.5 Nominal lowergize CB/T 14984-94
The minimum value of the particle size range specified in the standards and technical requirements for delivery conditions of various types of ferroalloys. 5.6 Size fraction
The process of screening the test sample with a double-layer sieve with an aperture of Xm and Ymm (where X>Y) or a single-layer sieve with an aperture of Xm (or Ymm). Screening with a double-layer sieve is marked as -Xmm+Ym, and screening with a single-layer sieve is marked as +Xmm or -Xmm (+Ym or -Ym). 5.7 oversize
the material that cannot pass through the sieve with the maximum limit value Xm, usually expressed as +X. 5.8 undersize
the material that can pass through the sieve with the minimum limit value Ymm, usually expressed as -Ym. 5.9 size distribution
the quantitative grouping of sample particles according to their size, which is expressed as the percentage of the amount passing or remaining on the selected sieve to the total amount of the sample. 5.10 sieving
the process of separating ferroalloys according to the smallest particle size using one or more sieves. hand sieving
the operation of manually supporting and shaking a sieve (or multiple sieves). 5.12 assisted hand sieving the operation of mechanically supporting but manually shaking a sieve (or multiple sieves). 5.13 mechanical sieving the operation of mechanically supporting and shaking a sieve (or multiple sieves). 5.14 Hand placing
The ferroalloy particles (lumps) left on the sieve after screening are manually sorted so that the particles (lumps) can be clearly classified as much as possible. Additional remarks:
This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgy. This standard is drafted by Jilin Ferroalloy Plant, Information Standards Research Institute of the Ministry of Metallurgical Industry, and Shanghai Ferroalloy Plant. The main drafters of this standard are Shu Li, Jiang Chunzang, Fu Yongxin, and Chen Huohua. The level of this standard is marked as GB/T14984-94113 Systematic sampling Sygtematic sampling is a practical sampling method that takes samples at specified intervals according to product number, time or location. The first sample is randomly taken in the first interval.
4.14 Two-stage sampling Two-stage sampling is a practical two-stage random sampling method. In the first stage, the basic sampling pieces (i.e. packages or part of the delivery batch) are selected; in the second stage, a number of samples (secondary samples) are randomly taken from each of the selected basic sampling pieces. 4.15 Sample preparation
The process of preparing a test sample for determining the value of a quality characteristic. This process includes sample reduction, crushing, mixing and sometimes pre-drying. These operations can be carried out in several stages.
4.16 Division
The process of reducing the sample size according to regulations in order to obtain the sample size required for a test sample. 4.17 Divided sample
The sample obtained by the division method.
4.18 Test sample
A sample prepared for the purpose of determining the chemical composition or particle size distribution. It is prepared from each portion, subsample or bulk sample in the manner specified for the sample type.
4.19 Size sample
A sample taken to determine the particle size distribution of a delivery batch or part of a delivery batch. 5 Sieving
5.1 Particle
An individual agglomerate of a ferroalloy.
5.2 Size range (in sieve analysis) Size range is defined by the smallest sieve hole through which a batch of ferroalloy particles can pass and the largest sieve hole through which the particles cannot pass.
5.3 Maximum particle size A length measure of the size of an alloy particle, usually expressed as the square sieve hole through which 100% of the ferroalloy pieces pass or as a ruler with a square hole.
Note: GB/T13247-91 Sampling and Testing Methods for Ferroalloy Product Particle Size stipulates that the side length of various ferroalloy product particle sizes in one direction should not exceed 1.5 times the maximum limit value.
5.4 Nominal top size The maximum value of the particle size range specified in the standards and technical requirements for delivery conditions of various types of ferroalloys. 5.5 Nominal lowergize CB/T 14984-94
The minimum value of the particle size range specified in the standards and technical requirements for delivery conditions of various types of ferroalloys. 5.6 Size fraction
The process of screening the test sample with a double-layer sieve with an aperture of Xm and Ymm (where X>Y) or a single-layer sieve with an aperture of Xm (or Ymm). Screening with a double-layer sieve is marked as -Xmm+Ym, and screening with a single-layer sieve is marked as +Xmm or -Xmm (+Ym or -Ym). 5.7 oversize
the material that cannot pass through the sieve with the maximum limit value Xm, usually expressed as +X. 5.8 undersize
the material that can pass through the sieve with the minimum limit value Ymm, usually expressed as -Ym. 5.9 size distribution
the quantitative grouping of sample particles according to their size, which is expressed as the percentage of the amount passing or remaining on the selected sieve to the total amount of the sample. 5.10 sieving
the process of separating ferroalloys according to the smallest particle size using one or more sieves. hand sieving
the operation of manually supporting and shaking a sieve (or multiple sieves). 5.12 assisted hand sieving the operation of mechanically supporting but manually shaking a sieve (or multiple sieves). 5.13 mechanical sieving the operation of mechanically supporting and shaking a sieve (or multiple sieves). 5.14 Hand placing
The ferroalloy particles (lumps) left on the sieve after screening are manually sorted so that the particles (lumps) can be clearly classified as much as possible. Additional remarks:
This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgy. This standard is drafted by Jilin Ferroalloy Plant, Information Standards Research Institute of the Ministry of Metallurgical Industry, and Shanghai Ferroalloy Plant. The main drafters of this standard are Shu Li, Jiang Chunzang, Fu Yongxin, and Chen Huohua. The level of this standard is marked as GB/T14984-94114 Hand sorting
The ferroalloy particles (lumps) left on the sieve after screening are sorted manually, so that the particles (lumps) can be sorted as clearly as possible. Additional remarks:
This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgy. This standard is drafted by Jilin Ferroalloy Plant, Information Standards Research Institute of the Ministry of Metallurgical Industry, and Shanghai Ferroalloy Plant. The main drafters of this standard are Shu Li, Jiang Chunzang, Fu Yongxin, and Chen Huohua. The level of this standard is marked as GB/T14984-94114 Hand sorting
The ferroalloy particles (lumps) left on the sieve after screening are sorted manually, so that the particles (lumps) can be sorted as clearly as possible. Additional remarks:
This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgy. This standard is drafted by Jilin Ferroalloy Plant, Information Standards Research Institute of the Ministry of Metallurgical Industry, and Shanghai Ferroalloy Plant. The main drafters of this standard are Shu Li, Jiang Chunzang, Fu Yongxin, and Chen Huohua. The level of this standard is marked as GB/T14984-941
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