Precast

Keramicalia makes fine pourable ceramics called refracramics, which are used to make a wide range of products that could only be made previously by pressing. We have over 600 moulds along with Gee Kay Industrials and Scottley Ceramics, which also precast with refractoramics.

Crucibles

We make a range of crucibles from tiny to around 50kg at present, however few are stocked. Chemical qualities are Zircon for flux resistance, silicon carbide for good heat transfer and alumina for high temperature.

MOULD VOLUME CAPACITY I.D. O.D. H T MASS SHAPE PRICE 2023
no. litres kg brass mm mm mm mm kg excl VAT
31 0.5 3.5 98 116 140 9 1150 round R324.00
175 0.42 3 92 110 110 9   conical R233.00
176 0.4 2.8 80 166 150 13 1060 conical R301.00
181 0.042 0.3 63 76 40 7 290   R72.00
203 0.125 0.8 54 71 80 7 400 straight R157.00
229 1.7 12 128 164 180 18 3000 typical + lip R735.00
254 0.082 0.6 52 57 48 205 54 typical R92.00
283 0.16 1 55 70 90 7 320 round R136.00
284 0,028 0.2 40 48 58 4 80 conical R72.00
285 0.02 0.14 34 45 60 4 83 conical R100.00
285 0.04 0.3 38 45 60 3.5 50 C L R72.00
286 0.7 5 93 117 155 12 1300 conical R449.00
313 0.006 0.042 32 39 11 3 15 solid R72.00
322 0.07 0.5 85 100 43 10 288 flat R49.00
326 0.036 0.25 40 51 50 7 130 straight R54.00
333 0.062 0.4 71 77 27 5 80 flat R72.00
371 0.09 0.6 75 85 40 7 350 solid R111.00
372 0.074 0.5 57 75 35 2.5 102 round R94.00
373 0.102 0.7 53 78 40 5 175 round R111.00
379 0.082 0.6 60 80 43 7 435 solid R164.00
418 0.014 0.1 40 58 13 5 80 flat R72.00
432 1.1 7.5 95 112 200 8 930 typical R273.00
477 0.56 4 87 100 145 15 1500 conical R403.00
478 0.2 1.4 70 92 98 12 510 conical R184.00
479 0.255 1.8 68 88 116 10 600 conical R202.00
480 0.69 4.8 91 107 133 7 680   R226.00
481 0.345 2.4 72 82 122 5 370 straight R151.00
482 1.05 7 90 125 155 12 1915 typical R483.00
494 1.62 10 95 123 157 13 2770 round R667.00
495 0.9 6 95 123 157 13 1770 round R453.00
496 0.8 6 94 122 155 15 1800 round, hole R478.00
520 0.3 2 62 73 127 6 320 dr.glass R150.00
539 1.47 10.2 120 150 105 14 2530 typical R569.00
540 0.5 3.5 116 150 80 16 1340 flat R345.00
541 0.12 0.8 52 72 78 10 310 spout R135.00
559 1.5 10 123 152 165 15 2725 typical R594.00
566 0.5 3.5 77 118 150 20 2300 straight R299.00
645 0.34 2.3 63 72 135 4 290 drinking glass R179.00
646 0.325 2 64 185 130 4 370 spout R179.00
675 0.1 0.7 62 67 47 3 55 round R89.00
854 0.8 0.64 110 130 153 10 1040 conical R486.00
922 0.044 3 43 47 37 3 26 round R76.00
923 0.82 5.7 102 120 120 9 780 straight R395.00
926 0.11 0.77 44 53 88 6 230 straight R59.00
958 0.45 3.2 76 85 155 4 565 drinking glass R119.00
988 0.028 0.2 25 32 65 3 5 typical R89.00
1023 0.115 0.8 45 52 75 3 100 straight R119.00
1024 0.035 0.24 31 35 50 2 30 straight R65.00
1025 0.053 0.37 39 43 54 2 36 typical R76.00
Porcelain 0.02 0.14 35 39 32 2 14 typical R232.00

Spin Casting crucibles

Sintering trays

Can be made to your size quite easily.

MOULD VOLUME EXTERNAL INTERNAL MASS PRICE 2023 NOTES
No. Litres Length Width Height Length Width Height Kg Excl VAT  
443 10 340 290 125 320 275 115 5.6 R 1620 Square
935 6,3 405 325 88 370 328 71 6,3 R 1750 Rounded
899 4,87 300 300 73 285 285 60 3,8 R 920 rounded
768 3,3 210 210 100 195 195 87 2,7 R 655 rounded
303 3,26 323 323 53 297 297 377 5,0 R 810 Castellated
223 2,0 298 200 65 270 175 50 2,3 R 820 rounded
198 2,0 298 200 65 270 175 50 2,5 R 930 With feet
224 2,0 298 200 65 270 175 50 4,8 R 1035 Solid
769 2,0 235 175 70 220 162 58 1,6 R 390 rounded
226 1,8 210 160 77 194 140 70 2,1 R 668 straight
770 0,87 275 135 41 260 120 28 1,5 R 365 rounded
225 0,55 234 135 40 207 108 30 1,2 R 445 tapered
514 0,33 170 130 40 145 105 28 0,9 R 220 tapered
180 0,14 306 158 26 290 144 7 2,0 R 485 flat

Automatic ladles

Most of these are cloned from steel ones and are therefore poorly designed

Pipes

We stock various thermocouple tubes etc. in fully dense mullite and alumina in small diameters, up to 30mm, and can supply larger diameters in refractoramics, up to 1 metre diameter. The refractoramics are somewhat porous and permeable, but have good thermal shock resistance. Dense sintered ceramic has very poor thermal shock resistance.

Funnels

Most of our funnels are for feeding high-pressure die casting machines. The foot is custom made to fit your shot hole.

Launders

Launders are most commonly made of Keratuff, fibre reinforced materials.

Thermal Cups

Protect flexible cables, hydraulic hoses and water cooling pipes around furnaces. They withstand intense radiant heat and molten metal splashing. The ceramic sleeves are threaded over the pipes or cables, and allow them to bend while still covering them. Steel springs cast into the ceramic thermal cups give them good resistance to abrasion and impact.
I.D. 22 40
O.D. 60 83
Length 48 60
Cups/ metre 21 17
Mass/ cup 185g 315g
Mass/ metre 3.9kg 5.4kg
Rad. of bend 350mm 600mm
Price 2016/ cup R 14 R 22
Price 2016/ metre R 959 R 1535

 

Moulds can be made for any I.D.
For I.D. 20 to 35mm, O.D. = 60mm
For I.D. 35 to 50mm, O.D. = 83mm

Curtain Bricks

This is a suspended wall design which needs lateral support, but can save a great deal of space in boilers and rotary hearth furnaces.

Glass Slumping Kilns

Permeable Parts

We have a range of different permeabilities in course or fine pore sizes, which can be used for; Fluidized beds, Porous plugs, Fluxing tubes, Liquid filtration, possibly hot gas filtration

Element Supports Ribbon Elements Roof Hangers & Sidewall

We have made various specials, such as high purity alumina and ultra lightweight…

We encourage furnace builders to make their own designs, which we can manufacture exclusively for them, competitively priced.

Comb Tiles

These are floor tiles for keeping ribbon elements raises off the floor, so that scale and rubbish can fall past them and accumulate harmlessly below the elements.

Wound Elements

We can supply tubes and large and small support blocks

Stove Type Elements

These are normally supported by metal parts, but we have some fancy roof bricks and some candle discs.

Globars

Globars are silicon carbide heating elements. We can supply various lead outs, sleeves and silicon carbide sheaths to protect them from furnace and fluxes

Coiled Elements Candle Discs

Perforated Plates

Muffles

We make two standards with element grooves. Special sizes without grooves can be made to order, with one end closed if desired.

Candle Spirals

Bobbins

Terminations

Leadouts

Elements Cages

These are Jay Lloyd’s invention. Best thing since sliced mouldable. Mostly custom made to fit some crucible of machine. Silicon carbide, with hugely efficient line of sight radiant transfer

Radiators

Favored by powder coaters and ostrich breeders!

Furnace Shells

Those arose from cage technology. They crack quite appreciably in the vertical plane. Don’t patch these cracks, they are healthy.

Flask Warmers

Curved Brick

Flat Bricks and Tiles Open Groove

These bricks are individually anchored through the shell. They can move sideways, up and down, even twist, without exerting undue pressure on their neighbors. Consequently, they almost never break. When chemically attacked or contaminated or otherwise melted down, single bricks can be replaced without damaging the wall structure. We make 3 groove 230 x 230 x 100mm, 4 groove 230 x 230 x 76mm and 3 groove 450 x 300 x 100mm bricks. Quality usually Keramite 4, with low thermal mass.

Embedded

These originated in Europe, but we believe our quality embedding is better, and our backing more insulating. The “boards” are popular in crucible furnaces, because an element can be replaced almost “on the run” without cooling down the furnace.

Elements Boards

Compared to imports , we offer the same electrical specs, but use larger diameter coils, to get larger pitch, better heat spread and superior anchoring in the board.

STANDARD LIGHT HEAVY
Furnace Kilowatts 46
Board Kilowatts @ 220V 4 2,4 6,5
Resistane ,  Ohms ambient  12 19,8 7,4
Kanthal Al wire total Length 27m 34,7m 42mm
Wire Diameter 2,4mm 1,8mm 3,2mm
Number of legs 6 6 6
Leg spacing 30mm 30mm 30mm
Turns per leg 106 101 110
I.D of coils  16mm 16mm
O.d. of coils 20mm 20mm 23mm
Stretched length of coils 530mm 530mm 530mm
Pitch 7,4mm
Tails, type double twist double twist double twist
            length 500mm 400mm 500mm
           termination 6mm lug 6mm lug

 

All our coils are more exposed than the imported boards, and our boards are mechanically stronger yet more insulating. We believe our boards to be superior to the imported ones.

Our boards have the tails coming out of the top.

We can make them come out of the back if your customer prefers it.

XVIER: note tails come out the end, not the back.

Semi Enclosed

We supply cones of the unaffordable Wild Barfield spares, and a huge size range of Arthur Kuhler’s technology from dental kilns to metre scale.