Pretreatment of Bauxite With Oxygen or Air At Elevated Temperature.
MacDonald DJ; Zamzow MJ; Shanks DE
For Reference Only At Bureau Libraries :8 pages
A typical Jamaican bauxite was subjected to treatments at tempertures up to 440 deg c in oxygen or air; its leachability under Bayer process conditions was measured, and properties of its leached residue were observed. The objective was to decrease the amount of organic matter in bauxite or in leach liquor derived from it without impairing leachability. Techniques employed included heating bauxite under pressure in an autoclave (a closed system, in which water vapor and other gaseous products were confined and remained in contact with the bauxite) with oxygen or air, and in flowing oxygen at ambient pressure in a tube furnace (an open system). Leaching tests were done in a 600-ml stirred reactor. Results showed that treatment at temperatures above 160 deg c progressively diminished the bauxite's content of organic carbon. The bauxite's leachability was not impaired by high-temperature treatments except at temperatures higher than 300 deg c.
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.