摘要:
An assembly for providing a saggar for use in high temperature applications, may include a rectangular base element and first and second sets of two rectangular wall elements, wherein the rectangular base element includes connectors on two opposite sides for connecting with the two rectangular wall elements of the first set of the rectangular wall elements at the two opposite sides. The two rectangular wall elements of the first set may each include a connector at a first edge for connecting with the rectangular base element at the two opposite sides, and the two rectangular wall elements of the first set each may include two recesses in a second edge opposite to the first edge and in the vicinity of each end of the second edge of the rectangular wall elements of the first set. The two rectangular wall elements may each include two ears for connecting with the recesses.
摘要:
A system for curing concrete products resident in a kiln, in particularly for producing high strength building blocks from relatively dry green concrete, controls temperature and humidity in the kiln as a function of time in the curing cycle from a water pool heated by underwater grates near the upper water surface. Heated air and air/CO.sub.2 mixture also is circulated in the kiln during relevant portions of the curing cycle. Accelerated evaporation from the water well is induced by ruffling the water surface with the circulated air with enough intensity that the grates are uncovered to quickly evaporate water films wetting the grate surfaces. A baffle structure thus directs circulating air into the water surface. Individual grates are heated at critical times during the heating cycle in a manner to control temperature of different zones within the kiln by means of circulating hot liquids, such as oil. For example the temperatures at each grate may respond to thermostats controlling liquid flow valves for the respective grates. The comprehensive system may be automatically controlled by a computerized control system during curing cycles as a function of time to provide critical curing conditions including: (1) early cooling during exothermic reactions in the green concrete, (2) intermediate humidification to prevent drying of the partly cured concrete, (3) providing CO.sub.2 rich heated circulating air for curing the concrete and (4) heating with dry air near the end of the curing cycle for drying out the concrete.
摘要:
Appropriately spaced aligning pins are engaged with respectively corresponding portions of each of plural saggers disposed on a pallet. The pallet and aligning pins are then moved relative to one another so as to accurately and substantially simultaneously space apart the plural saggers on the pallet prior to firing.
摘要:
An apparatus for loading tiles into firing ovens comprises, in combination with each firing oven chamber, a device for feeding the tiles, means for forming on such device a file of tiles which must be loaded concurrently, and means for taking up from such device the tile file and forwarding it in the direction of the oven and transferring the tiles onto a terminal conveyor which conveys the tiles to the oven inlet. Preferably the tile take-up means are constituted by a support device which vertically displaceable between a lowermost and an uppermost position and adapted to lift up the tiles as it passes from the first to the second positions. Preferably also the tiles are forwarded in the direction of the oven by a thruster actuatable by suitable means in the desired direction and adapted to engage and to forward the tile file which has formed on the feeding device. An auxiliary static support organ is preferably provided to support the tiles in an intermediate phase of the forward progress.
摘要:
For separating green bricks arranged in a compact array of abutting rows, a separating device is operable to engage the leading row of the compact array and to hold the individual row between the separating device and a base as the remainder of the array is moved away, whereby the engaged individual rows are sequentially separated at spaced distances on the base.
摘要:
In the vertical heating furnace of the bottom charge type having a lift to go up for charging a piece of to be-heated material, an apparatus for charging a piece of such material into the furnace, provided, for free vertical movement, with a cap for supporting the so charged piece of material by the engagement of the groove made on the bottom surface thereof with the tip of said piece of material.
摘要:
An automatic plant is provided for the continuous drying, firing and stacking of bricks and the like. The plant includes a tunnel. The drying of the material takes place in a first section of the plant in several stages with the bricks to be dried being spaced apart and subsequently reassembled. Then the bricks are moved through a next section in which they are superimposed and may be reassembled again. This movement takes place at a variable speed to compensate for any temporary stoppages in the working cycle. When the drying is completed the bricks enter into a firing kiln. From there, they move to a discharge surface upon which stacks of bricks are formed.
摘要:
A method including preheating a set of N shell molds for lost-wax casting, where the method can comprise: individually charging shell molds into n unit electric furnaces, each of which has previously been preheated to an initial loading temperature; starting a predefined preheating cycle for each shell mold charged in the unit electric furnaces, with a preheating cycle comprising raising the temperature of the furnace in compliance with a predefined ramp up to a predetermined setpoint temperature, and holding the furnace at the setpoint temperature for a predetermined duration; and at the end of each preheating cycle, unloading the shell mold in question and repeating the two preceding operations for another non-preheated shell mold.
摘要:
Apparatus for loading and unloading a firing table arrangement with product for firing, wherein the firing table arrangement comprises on at least one horizontal plane a plurality of rollers having ends disposed at a distance from one another for picking up the product for firing, comprises a supporting structure (20), aligned relative to the firing table arrangement, with two horizontally projecting supporting arms (24) each of them running traversely relative to the rollers, laterally outside the firing table arrangement which are accommodated on the supporting structure (20) so as to be adjustable in height, said supporting arms having inner sides facing one another and a front end, a drive member (26) disposed on the inner side of one supporting arm (24) which, after coupling to the rollers of the firing table arrangement, set them in a rotating movement, and a device disposed on the inner side of the other supporting arm for the rotatable guiding of the rollers of the firing table arrangement. The apparatus may also include a drive member on both supporting arms for coupling to the rollers of the firing table arrangement to set them in rotating motion. The apparatus may also include a plurality of driveable rollers which are adjustable in height perpendicular to the supporting arms.