# US 4,400,334 A · Apparatus for making hearth of kiln under vibration

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- Number: US 4,400,334 A
- Document ID: US4400334A
- Status: Granted
- Kind: A
- Application number: 06/311,767
- Filed: 1981-10-15
- Granted: 1983-08-23
- Earliest claimed: 1979-08-22
- Assignees: Shinagawa Refractories Co., Ltd.
- Inventors: Shigeru Okuda; Masashi Mori; Masahiro Hayase
- Web page: https://patentgrep.com/patent/US4400334A

## CPC

- F27D 1/16: Making or repairing linings {; Increasing the durability of linings; Breaking away linings}
- F27B 2003/125: {Hearths}
- F27D 2003/0038: {comprising shakers}
- F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27B: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS

## Abstract

An apparatus and method for making a hearth of kiln under vibration comprising mounting vibrating mechanisms to a pressurizing plate in which the area of the pressurizing surface is in the range 0.5-5 m.sup.2, and said vibrating mechanisms are mounted to the pressurizing plate directly or through a frame.

## Claims

### Claim 1

A method of compacting a layer of dry particulate refractory material over a lining of refractory bricks on a circular hearth of a kiln having an upstanding peripheral wall, comprising the steps of:
providing vibrating-compacting apparatus comprising a sector-shaped pressurizing plate said plate having a surface area of 0.5 to 5 m.sup.2 and having an arcuate end, and means for vibrating said plate;
providing a layer of dry, compactable particulate refractory material over said lining of refractory bricks on said circular hearth;
positioning said vibrating-compacting apparatus on said layer, the arcuate end of said sector-shaped pressurizing plate having a radius of curvature substantially the same as that of the peripheral wall of said kiln such that the arcuate end of the sector-shaped pressurizing plate can be positioned in adjacency along its length with said peripheral wall, said pressurizing plate being sized to cover only a minor portion of said circular hearth;
actuating said vibrating means to compact the dry particulate refractory material under said pressurizing plate; and
moving said vibrating-compacting apparatus to a new position on said hearth to compact the dry particulate refractory material thereunder to provide a compacted layer of said dry particulate refractory material on said kiln hearth.

### Claim 2 (depends on 1)

A method according to claim 1 wherein additional dry particulate refractory material is provided on the compacted layer and wherein the vibrating compacting apparatus is positioned to compact the additional dry particulate refractory material to build up the thickness of said compacted layer.

### Claim 3 (depends on 1)

A method according to claim 1 wherein said sector-shaped pressurizing plate has sides having a lenght approximately equal to the radius of said kiln hearth and wherein the vibrating-compacting apparatus is positioned on such layer such that its arcuate end is in adjacency along its length with said peripheral wall.

### Claim 4 (depends on 1)

A method according to claim 1 wherein said apparatus further comprises a frame and wherein said vibrating means are mounted on said frame.

### Claim 5 (depends on 1)

A method according to claim 1 wherein said vibrating means are mounted directly on said pressurizing plate.