Title: Improvements in apparatus for injecting substances into liquids
Application Number: 87104829 Application Date: 1987.06.25
Publication Number: 1015773 Publication Date: 1988.01.13
Approval Pub. Date: 1991.06.19 Granted Pub. Date: 1991.06.19
International Classifi-cation: C21C7/04
Applicant(s) Name: Injectall ltd. Address:
Inventor(s) Name: Kenneth William Bates
Attorney & Agent: XIAO ERGANG
Abstract:
    For injecting substances into a liquid e.g. molten metal, a nozzle block is mounted in the wall of a vessel containing the liquid. Initially, an injection passage extending through the block is closed by a plug to prevent ingress of liquid, and only when injection is to commence, is the plug thrust aside by a delivery pipe movable in the passage, the pipe forming part of an injection lance assembly. The positions of the lance assembly before and after injection are determined by a safety stop arrangement for example comprising a detent in the form of a spring-loaded plunger housed in a fixed part of the apparatus; the plunger coacts with front and rear ramps of an abutment which is fast with part of the lance assembly, to govern the positions of the lance assembly before and after injection.
Time: 3