Abstract Gas stirring is an important process used in secondary metallurgy. It allows to homogenize the temperature and chemical composition of liquid steel remove inclusions which can be detrimental for end-product quality. In this process, argon gas injected from two nozzles at bottom vessel rises by buoyancy through thereby causing stirring, i.e., a mixing bath. The flow rates positions are ...

A simple manual micro-titration method is proposed for the potentiometric and conductometric titration of 200 to 800 µL liquid samples. The sample be titrated dispensed into chamber; bottom section a plastic test tube that glued center small stirring magnet. After inserting sensing probe tip titrant delivery chamber, chamber-stirring magnet assembly spun at low speed using conventional magnetic...

We analyze an example system of four coupled phase oscillators and discover a novel phenomenon that we call a “heteroclinic ratchet”; a particular type of robust heteroclinic network on a torus where connections wind in only one direction. The coupling structure has only one symmetry, but there are a number of invariant subspaces and degenerate bifurcations forced by the coupling structure, and...

This study investigates the use of bottom ash as an adsorbent with and without chemical activation treatment. also determines effect pH stirring speed on efficiency in adsorption color COD. Bottom was ground sieved by 100 mesh sieves activated hydrochloric acid 2%. The experiments were conducted at variations 6, 8, 10; contact time 30, 60, 90 minutes; speeds 30 60 rpm. most effective non-activa...

Hidenori Yamada, DDS, PhD (1), Ayako Okada, DDS, PhD (1), Takatoshi Murata, DDS, PhD (1), Kimiyuki Uetani, DDS (2), Mami Kotoh, DDS, PhD (2), Naoyuki Nishitsuji, DDS (2), Yoshihide Yabuki, DDS (2), Yoichi Fukuzawa, DDS, PhD (2), Hirokazu Yoshino, DDS (2), Koshi Kubo, DDS (2), Mitsuhiro Abe, DDS, PhD (2), Takatoshi One, DDS, PhD (2), Hiroaki Nagai, DDS, PhD (2), Masataka Yajima, DDS (2), Yoshiak...

Abstract In this article, the side-entry agitator commonly used in wet desulfurization absorption tower of a 300 MW thermal power unit was taken as research object, and gas–liquid two-phase flow field stirring tank numerically simulated by using two-fluid model based on Euler–Euler method. The vertical horizontal velocity distribution gas phase were studied. results showed that formed “fountain...