HG/T 2504-1993 Limestone for Chemical Industry HG/T2504-1993 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T 2504 —93
Limestone for Chemical Industry
Published on September 2, 1993
Ministry of Chemical Industry of the People's Republic of China
Implemented on July 1, 1994
Chemical Industry Standard of the People's Republic of China
Limestone for Chemical Industry
Subject Content and Scope of Application
HG/ T 2504—93
This standard specifies the technical requirements, test methods and inspection rules for the quality of limestone for soda ash and calcium carbide. This standard is applicable to limestone for the production of soda ash and calcium carbide, and can also be used as a reference for other chemical uses. 2 Reference standards
GB/T15057.1 Sampling and sample preparation methods for chemical limestone GB/T15057.2 Determination of calcium oxide and magnesium oxide content in chemical limestone GB/T15057.3 Determination of hydrochloric acid insoluble matter in chemical limestone - Gravimetric method GB/T15057.4 Determination of trioxide content in chemical limestone - Gravimetric method GB/T15057.8 Determination of vegetable content in chemical limestone - Gravimetric method and combustion-iodine salt titration method GB/T 15057.9
Determination of phosphorus content in limestone for chemical industry
Molybdenum blue spectrophotometry
3 Technical requirements
3.1 Limestone for soda ash shall meet the requirements of Table 1: 1
Calcium carbonate (CaCO) content, %
Magnesium carbonate (MgCO) content, %
Trioxide (R,O,) + hydrochloric acid insoluble matter. % Note: Ore particle size is determined by agreement between the supply and demand parties. 3.2 Limestone for calcium carbide shall meet the requirements of Table 2:>
Approved by the Ministry of Chemical Industry of the People's Republic of China on September 2, 1993Superior product
First-class product
Qualified product
Implemented on July 1, 1994
Calcium oxide (CaO) content, %
Magnesium oxide (MgO) content, %
Trioxide (R,O) content, %
Content of hydrochloric acid insoluble matter, %
Sulfur (S) content, %
Phosphorus (P) content, %
①Ore particle size shall be determined by agreement between the supplier and the supplier: Note:
HG/ T 2504 —93
Superior products
③Under normal production conditions, the sulfur and phosphorus content is sampled once every quarter. 4 Test methods
4.1 Sample collection and preparation: in accordance with GB/T15057.1. 4.2 Determination of calcium carbonate and calcium oxide content: in accordance with GB/T15057.2, Part I. First-class products
4.3 Determination of magnesium carbonate and magnesium oxide content: in accordance with GB/T15057.2, Part II is arbitration method. 4.4 Determination of trioxide content: in accordance with GB/T15057.4. 4.5 Determination of hydrochloric acid insoluble content: in accordance with GB/T15057.3. 4.6 Determination of sulfur content: in accordance with GB/T15057.8. 4.7 Determination of phosphorus content: in accordance with GB/T15057.9. 5 Inspection Rules
Qualified Products
5.1 Limestone products shall be inspected by the technical inspection department of the production unit. The production unit shall ensure that the product indicators meet the requirements of this standard.
5.2 Limestone products of the same quality sent to the same user are grouped as one batch, and a quality certificate of a certain format is attached. The maximum quantity of each batch shall not exceed 3000t. The content of the certificate shall include: name of the production unit, product name, product grade, quality indicators, batch weight, batch number, vehicle number, shipping date and this standard number. 5.3 The user unit has the right to re-inspect the received products in accordance with the provisions of this standard. If there is any objection, it should be raised within 10 days after arrival, and the two parties can negotiate to resolve it. If arbitration is required, it shall be carried out in accordance with the "Interim Measures for National Product Quality Arbitration Inspection". 5.4 When determining whether the inspection data conforms to this technical indicator, this standard adopts the rounded value comparison method. 6 Marking, packaging, transportation, storage
6.1 Limestone products are transported by train, car, ship or other means of transportation. 6.2 During the storage and transportation of limestone products for calcium carbide, pollution of harmful substances such as phosphorus should be prevented. 2
Additional instructions:
HG/T 2504—93
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Chemical Industry Mine Design Institute of the Ministry of Chemical Industry. This standard was drafted by the Chemical Industry Mine Design Institute of the Ministry of Chemical Industry. The main drafters of this standard are Li Donghao and Xu Xiulan, the People's Republic of ChinawwW.bzxz.Net
Chemical Industry Standards
Chemical Lime
HG/T2504—93
Editorial Department of Chemical Industry Standards
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal code: 100013
Printing Standardization Research Institute of the Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Format 880×12301/16 Printing Sheet 6 Words 6000 First Edition in March 1994: First Printing in March 1994 Printing 1—500
Cost 1. 00 yuan
2504—93
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