NIOSHTIC-2 Publications Search

Kroll process beryllium.

Authors
Campbell-TT; Mussler-RE; Block-FE
Source
Metall Trans 1970 Oct; 1(10):2881-2887
NIOSHTIC No.
10010305
Abstract
High-purity beryllium metal was prepared on a laboratory scale by kroll process procedures in which sodium was used as a reductant. Crude beryllium chloride, purchased from commercial sources, was purified by vacuum sublimation and fused-salt scrubbing. Purified beryllium chloride was vaporized and reacted at a controlled rate with molten sodium at temperatures ranging from 650 deg. to 750 deg. C to form beryllium sponge. Excess metal reductant and byproduct salt were removed from the sponge metal by vacuum distillation. Beryllium sponge metal was wet ball milled to -200 or -400 mesh powders. Beryllium powder metal, subsequently consolidated by isostatic pressing, was hot extruded and machined into tensile specimens for evaluation of mechanical properties. Evaluation indicates that the beryllium described in this study is of higher purity than comparable commercial grades of metal; also, it is more ductile but has somewhat lower strength. The overall process appears to have an excellent potential from an economic standpoint.
Keywords
Beryllium-compounds; Metal-compounds; Metallic-compounds; Chemical-reactions; Chemical-properties
CODEN
MTTBCR
CAS No.
7787-47-5; 7440-41-7; 7440-23-5
Publication Date
19701001
Document Type
OP; Journal Article
Fiscal Year
1971
Identifying No.
OP 147-70
ISSN
0360-2141
NIOSH Division
ALRC
Source Name
Metallurgical Transactions. B. Process Metallurgy
State
OR
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division