Central shaft feeding for rotary hearth furnace
阅读：39发布：2022-05-06
专利汇可以提供Central shaft feeding for rotary hearth furnace专利检索，专利查询，专利分析的服务。并且A method and apparatus for the thermal decomposition of limestone or other mineral substance wherein the apparatus employed for carrying out the method combines a vertical shaft for the feed therethrough of the materials to be treated and a rotary hearth positioned therebeneath. The rotary hearth is contained within a substantially airtight enclosure and receives the downward flow of the materials from the central shaft and further processes the same to produce the desired resultant product.，下面是Central shaft feeding for rotary hearth furnace专利的具体信息内容。
1. An apparatus for subjecting mineral substances to thermal decomposition comprising a rotary hearth mounted for rotation within the confines of a substantially airtight enclosure, a unitary, vertically extending feed column for the feed of materials to the said hearth, said materials in direct contact with the inner walls of the column, with said feed columns being positioned centrally of said hearth, said enclosure comprising a stationary roof and side walls with burner means mounted therein to direct a stream of hot gases within the enclosure and upwardly in direct contact with the mineral substances, rabbles mounted in said roof, said rabble means engaging wIth said materials on said hearth to effect a turnover thereof during its travel thereon, and a material outlet for the said materials.
2. The structure recited in claim 1 wherein a pressure differential is maintained between the outlet end of the enclosure and the feed end for the raw materials whereby the hot gases will exit through the said vertically extending shaft to heat the materials in said shaft.
3. The structure recited in claim 1 wherein said shaft is maintained substantially filled with materials to be processed on the rotary hearth.
4. The structure recited in claim 1 wherein air is admitted at the outlet end for cooling the said processed materials and then directed to the burner means to supply preheated air thereto.
5. The method of subjecting a mineral substance to a thermal decomposition consisting of feeding such materials downwardly through a unitary, vertically extending feed column which is centrally located over a horizontally extending rotary hearth mounted within a substantially airtight enclosure, directing streams of hot gases within the enclosure and causing said hot gases to exit from within the enclosure through said vertically extending column to heat the materials downwardly flowing towards the hearth through the column, by direct contact with the substance.
6. The method set forth in claim 5 wherein the enclosure is provided with an exit for the processed materials and wherein a pressure differential is maintained between the feed shaft and the exit of the enclosure to induce the hot gases to exit through the vertically extending shaft to heat process the materials flowing downwardly therethrough.
7. The method set forth in claim 5 wherein said rotary hearth is associated with a plurality of rabbles to cause a turnover of the materials undergoing treatment thereon.
8. The method set forth in claim 7 wherein the enclosure is provided with an exit for the processed materials and wherein a pressure differential is maintained between the feed shaft and the exit of the enclosure to induce the hot gases to exit through the vertically extending shaft to heat process the materials flowing downwardly therethrough.
9. The method set forth in claim 8 wherein said rotary hearth is associated with a plurality of rabbles to cause a turnover of the materials undergoing treatment thereon.
10. The method set forth in claim 8 wherein air is admitted at the exit end for cooling the processed materials and such air is then directed to burners mounted in the walls of the enclosure.
11. The method set forth in claim 5 wherein air is admitted at the exit end for cooling the processed materials and such air is then directed to burners mounted in the walls of the enclosure.
12. The method of subjecting mineral substances to thermal decomposition consisting in feeding said substances to a unitary hollow column in such manner as to fill substantially the inner walls of the column, said column being positioned vertically over a horizontally extending rotary hearth in an air tight enclosure, directing streams of hot gases within the enclosure and causing said hot gases to exit from the enclosure upwardly through the column to directly contact and pre-heat the entire mass of the substances within the column.
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