The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2014
Filed:
Jun. 05, 2009
Pratik Swarup Dash, Jamshedpur, IN;
Pradip Kumar Banerjee, Jamshedpur, IN;
Debashish Bhattachargee, Jamshedpur, IN;
Tridibesh Mukherjee, Jamshedpur, IN;
Saibal Ganguly, Jamshedpur, IN;
Pratik Swarup Dash, Jamshedpur, IN;
Pradip Kumar Banerjee, Jamshedpur, IN;
Debashish Bhattachargee, Jamshedpur, IN;
Tridibesh Mukherjee, Jamshedpur, IN;
Saibal Ganguly, Jamshedpur, IN;
Tata Steel Limited, Jamshedpur, IN;
Abstract
A beneficiation process to produce low ash clean coal from high ash coals, including: preparing a coal slurry from fine coal and water and discharging it to a first reactor; preparing an alkali solution and discharging it to a first reactor; carrying-out a leaching reaction inside the first reactor; transferring the reaction mixture to a second reactor for filtration and washing to produce a filter cake; preparing a diluted acid solution and delivering it to a second reactor; preparing a diluted alkali solution and delivering it to a second reactor; feeding a coal slurry prepared from the filter cake into the second reactor for washing and transferring to a second filtration unit; transferring the product after filtration to a third reactor; carrying-out different leaching reaction sequences in the first, second, and third reactors; and transferring to a fifth tank the treated coal filter cake for drying.