T/BYXT 056-2023 Active Group standards

T/BYXT 056-2023 Rare Earth Calcium Sulfate Whiskers

T/BYXT 056-2023

Publish Date: 2023-09-01 Implement Date: 2023-09-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/BYXT 056-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Other inorganic chemical raw materials

ICS Name: Other chemical products

Publish Date: 2023-09-01

Implement Date: 2023-09-01

Pages: 15 pages

Scope

Scope: This document specifies the terms and definitions, raw material requirements, production requirements, production processes, quality requirements, experimental methods, inspection rules, marking, packaging, transportation, and storage of rare earth calcium sulfate whiskers. This document is applicable to calcium sulfate whiskers products produced from rare earth gypsum as raw material; Main technical content: 4. Raw material requirements: The raw material shall be rare earth gypsum solid waste generated from rare earth hydrometallurgy, and then treated with calcium chloride to produce rare earth gypsum solid waste. The rare earth Ce element content in rare earth gypsum should be around 0.025mg/L. 5. Production requirements: 5.1 Production site: The production site shall be located near the rare earth gypsum solid waste stacking site. The production workshop area and physical space shall be adapted to the production capacity, facilitating equipment installation, material handling, and personnel operation. 5.2 Facilities and equipment: 5.2.1 Hydrometallurgical reaction tanks and settling tanks. 5.2.2 MCR-3 type microwave chemical reactor. 5.2.3 101-1A type electric heating convection dryer. 5.2.4 DF-101S type heat-collecting magnetic stirrer. 5.2.5 SHZ-D (III) type circulating water multi-purpose vacuum pump. 5.3 Chemical reagents: 5.3.1 Inorganic strong acid solution, which can be any one of sulfuric acid, nitric acid, and hydrochloric acid. The molar concentration of hydrogen ions in the inorganic strong acid solution shall be 2-8mol/L. 5.3.2 Anhydrous ethanol, which shall comply with the requirements of GB/T 678. 6. Production process: Step one: Dissolve the rare earth gypsum in inorganic strong acid solution under microwave conditions to prepare a calcium sulfate supersaturated solution with a mass concentration of 50-120g/L; the microwave heating temperature shall be 40-90 ℃, and the heating time shall be 5-60 min. Step two: Use a circulating vacuum pum