The Bureau of Mines investigated the potential for recovering rutile and associated valuable heavy minerals from the Central Florida Pebble Phosphate District flotation circuits. Studies were made to determine (1) the type and quantity of valuable heavy minerals present at various points in the flotation circuits and (2) the technical feasibility of producing marketable grade concentrates of the valuable heavy minerals. Results of these studies indicate that the feed to the fine fatty acid flotation circuits contained an average of 0.39 percent heavy minerals. Based on available tonnage estimates the following average quantities of valuable heavy minerals should be passing through the district flotation plants annually; rutile, 4.5 Thousand short tons; zircon, 14 thousand short tons; opaque (ilmenite), 41.5 Thousand short tons; and monazite, 6 hundred short tons. However, heavy mineral recovery was extremely low, ranging from 18 to 23 percent of the rutile, 52 to 63 percent of the zircon, 17 to 29 percent of the ilmenite, and 50 to 56 percent of the monazite. The principal difficulty in achieving high recovery of the valuable heavy minerals was determined to be the fineness of size, which affected both the wet and dry separation techniques used for recovery.
Publication Date
19680101
Document Type
CP;
Fiscal Year
1968
NTIS Accession No.
PB-211328
NTIS Price
A04
Identifying No.
OFR 26-72
NIOSH Division
TURC;
Source Name
NTIS: PB 211 328; Available for Reference At Central Library, Us Dept. of Interior, Wash., DC
Links with this icon indicate that you are leaving the CDC website.
The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
You will be subject to the destination website's privacy policy when you follow the link.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.
For more information on CDC's web notification policies, see Website Disclaimers.
CDC.gov Privacy Settings
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.
Thank you for taking the time to confirm your preferences. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page.