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Reclamation of Aluminum Finishing Sludges
| Author | : F. Michael Saunders |
| Publisher | : |
| Total Pages | : 282 |
| Release | : 1987 |
| Genre | : Aluminum |
| ISBN | : |
The reclamation of aluminum-anodizing sludges produced as a result of finishing extruded architectural aluminum using etching and anodizing processes was studied by Georgia Tech Research Corporation. Two sequential phases focused on (1) enhanced dewatering of aluminum-anodizing sludges with recessed-chamber filter presses and (2) acidic extraction of dewatered aluminum-anodizing sludges to produce commercial-strength solutions of aluminum sulfate, i.e., liquid alum. A high-pressure (14 to 15 bar) and a diaphragm filter press were effective in dewatering aluminum anodizing sludges to cake solids contents of 27% to 29% and 25% to 31%, respectively. These values were well above the 21 % value required to justify pursuit of direct acidic extraction of aluminum. Commercial-strength solutions of aluminum sulfate with concentrations of 8% as AI2Oa were produced using conventional-neutralization, segregated-neutralization, etch-recovery sludge cakes. The trace metal contents of the alum products were, in general, typical of commercial products.
536 Puzzles and Curious Problems
| Author | : Henry E. Dudeney |
| Publisher | : Courier Dover Publications |
| Total Pages | : 449 |
| Release | : 2016-08-17 |
| Genre | : Mathematics |
| ISBN | : 0486796868 |
This compilation of long-inaccessible puzzles by a famous puzzle master offers challenges ranging from arithmetical and algebraical problems to those involving geometry, combinatorics, and topology, plus game, domino, and match puzzles. Includes answers.
Decisions and Orders of the National Labor Relations Board
| Author | : United States. National Labor Relations Board |
| Publisher | : |
| Total Pages | : 1150 |
| Release | : 1969 |
| Genre | : Labor laws and legislation |
| ISBN | : |
PHP Tutorials - Herong's Tutorial Examples
| Author | : Herong Yang |
| Publisher | : Lulu.com |
| Total Pages | : 300 |
| Release | : 2019-02-09 |
| Genre | : Computers |
| ISBN | : 0359417671 |
This PHP tutorial book is a collection of notes and sample codes written by the author while he was learning PHP himself. It can be used as a tutorial guide for beginners or a reference book for experienced developers. Topics include PHP script file syntax; data types and iterals; variables, operations and expressions; flow control statements: 'if' and 'switch'; loop statements: 'while', 'for', and 'do ... while'; function declaration, arguments, and return values; array and ordered maps; sending out emails; integrating with HTTP Web servers; accessing HTTP requests and responses; managing sessions and cookies; controlling HTTP response headers; accessing MySQL database server; accessing files and directories; using SOAP extension; managing non-ASCII characters; using classes and objects. For latest update, visit http://www.herongyang.com/PHP.
