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Nowadays they are called heavy and dense Firebricks but old masters still call them fire clay bricks just because they are made of simple fireclay (which actually is the most ordinary mud.) Fire clay can be easily located out in the nature but it must containing the right refractory properties, suitable content ratio of silica and alumina. Some shops call these bricks fireplace bricks. They are used for instance for building cooking chamber in wood fired ovens, for creating fireplaces, all sorts of fire boxes and wood heaters’ lining, linings in a small or the hugest industrial furnaces, you name it. Fire clay bricks are very heavy/dense having low porosity and even on various re-heating, and under continuous heat, they will last for very/very long time
Some may confuse them with insulating lightweight firebricks, those are used in different applications. Dense firebricks can be cut only with diamond wheel attached to high speed handheld angle grinders, on an ordinary building brick saw or sliding drop saw for cutting bricks. Fire bricks can be chopped in half easily by using brick chisel and a couple of hits with a heavier hammer. It is fun and quick but may you want to achieve precise nice cuts hire a trade machine or buy yourself at least small size grinder. Before cutting soak the brick in water by dipping it in a bucket of water or in a wheelbarrow if you had too many. Leave the bricks in that water for 5 minutes minimum. The cutting diamond wheel will last you for a long time if the firebricks are cut wet plus you won’t breath in any dust, and of course cutting gets a lot easier and faster!
When it comes to fire-bricks and dense refractory products composition content often Alumina (AL) ingredient is looked at which ranges ordinarily between 18% to 40% of alumina in modern product’s body. The percentage range is important for choosing the right product for the right temperature or Orton Cone but mainly if a high temps are applied. Alumina influences bulk density a lot and therefore also porosity, or if you like the weight of fire bricks. No need to apply above 26% in wood fired oven temperatures range but you can in case a low grade isn’t available to buy. Absolutely safely 18% AL amount firebricks can be used in wood ovens (you can melt and cast color metals in it too.) Furnace’s chamber build out of 18% will perform and last the same way as 30% alumina product
Apart higher co$t, additionally, higher Alumina content grades make these bricks harder and brittle (more glossy if you like) making them absorb less steam e.g. from under pizza dough bases being cooked or bread dough. However one can get used to cooking in such oven fast
Even though you can hear other words from a few suppliers who sell not locally manufactured product, conductivity and heat absorbing capacity is not influenced much at all by higher or lower alumina content. Higher grades won’t create magic temperature difference in cooking environment and vise verse. Main reasons for this are modern imports, one high alumina range suits all business and applications, less varieties to stock, higher markup and margin, those are the reasons if 18% to 26% brick isn’t sold by a store. Look for locally manufactured product, lower grades cost less to produce and they sell them for less. Where I buy refractory 26% AL firebricks costs $1.98 per one brick
BTW mineral Graphite does not contain Aluminium oxide (Alumina, formula Al2O3 – density: 3.95 g/cm3) and it is lighter in weight by half if compared with Alumina mineral or refractory bricks. And even so, the Graphite absorbs much more heat than firebricks do – more reading about firebricks’ thermal conductivity
Who is your fire brick or refractory supplier, do you have contact-s on them and where are you located? Have you noticed chipped or seconds fire bricks being sold for better price somewhere? Please leave your comments for others below…
Out of my head right now: fire brick = fire-clay brick = refractory brick = chamotte brick = fireplace brick = heat resistant brick = chimney brick = dense/heavy kiln brick (for building kilns) = industrial ceramic brick (heavy)
My refractory supplier is ClayPave Pty. Ltd. located in Dinmore, Brisbane, Qld., on the way to Ipswich. They have distributors all around the country and Internationally. It is large Australian manufacturer of refractory and clay products. ClayPave produces all grades of firebricks. Heat resistant mortars, ready mixed air-set in bucket, or fire clay in bags to mix your own refractory mortar at home – one bag is plenty for building 2 ovens. Best prices, delivered if needed
Standard firebricks or splits: AUD$2 to $2.20 each Fireclay: $25 per bag (large bag enough for 3 ovens) Pre-mixed heat resistand mortar: $33 per bucket (1 needed) Packed on the top of the palette with firebricks
Ian is a nice bloke quite knowledgeable about ovens, very helpful, won’t mind to open the warehouse at odd hours when someone really needs when ran out of fire bricks. He hires brick saw -standing idle
Look around in demolition yards. Read advertisements in papers, people very often sell for fraction of price or giveaway exactly this type of old bricks, and other great building material left over from other projects or from cleaning up. There are always few firebrick replacements to be seen here you just have to watch it. You can buy 200 of them even for 20 or 30 bucks in total and have lucky day. By the way these old bricks can be easily cleaned with hammer and brush because in the past brickies didn’t add much cement into mortar if any. Tables with firebricks physical properties
Hi Colin, Firebricks in WA are a hard thing to source but I do know of a place that does supply them, The Potters Market 56 Stockdale Rd O’Connor,Tel No 93376888.I cant tell you how much they charge per brick but I do know in comparrison to prices paid in other states from refractory suppliers direct they are a bit more expensive.When I built my oven 3 years ago I used normal solid bricks ” Austral Collie ” which is a cream solid .My oven is as good today as when I built it, Hope that helps Mark
Hi Colin, Yes the midland clay bricks Mark mentioned that he used for building his oven in Western Australia are almost identical to clay firebricks from Ipswich, they contain grog in the body as well. You can use them. Then there are solid clay bricks from Midlands somewhere, they are the same, can get the contact details if you needed. Maybe far from York?
supplies in USA ; if you live in or near Maryland, you can get Mt. Savage “Medium Duty” fireclay bricks (43.1% alumina content) at Potomac Valley Brick and Supply Company. They come in yellow or red. I got mine at the Rockville, MD location (3 Derwood Circle), for $1.33/brick. They also sell the fireclay mortar in pre-mixed tubs. The bricks I bought there differ in dimensions (height) from the Australian ones (2.5 inches vs. 3 inches).
I have found someone who has a small quantity of leftover firebricks with 45% alumina content and is selling it for $0.50 per brick. I am a bit worried about the higher alumina content and its higher heat conductivity causing bread to burn at the bottom
Today I bought 7 bags of Vermiculite from “The Perlite & Vermiculite Factory” at address “Lot 802 Cutler Rd, Jandakot 6164, Western Australia” phone number 08 9417 8377. The price was $15 cash per 100L bag. This was very cheap compared to some Perth hydroponics shops who sell vermiculite in the 100L bag for $40
Building sand very large bag from Ridgeons £46.73 + vat Ballast very large bag from Ridgeons £36.76 + vat 25Kg cement from Ridgeons £ 3.49 + vat Fireclay 25Kg from Buildbase London £21.39 Lime 25KG from Ridgeons £ 7.86 + vat
We specialize in Alumina materials and products, Mganesia materials and products, such as Clay Brick, Bauxite Brick, Fused corundum brick, High Aluminum Block, Nozzle etc. shaped products and Calcined Clay, Bauxite materials, Gunning materials, Ramming mix, Refractory castable and mortar etd. Unshaped materials, which have enjoyed great popularity in the world market
Should you find intrest in our items , please kindly let us know. We shall be pleased to give you our lowest quotations upon receipt of your detailed requirements.In our trades with merchants of various countries, we always adhere to the principle of equality and mutual benefit
My Firebrick supplier is Vesuvius SA (professional (huge scale) refractory selling directly to the public, too), located off Porcelain Road in Clayville (Olifantsfontein), Midrand, Gauteng. A huge variety of shapes and sizes can be bought from them, as well as various grades and purpose oriented refractory mortar, etc
We are professional supplier for refractory brick & ceramic fiber product at competitive price, located in Zibo City, Shandong Province, China. For more information, please check our website ( zbxdnc.com , zbxd.en.alibaba.com ), and select the products that you’re interested in
If you are importing or plans to import fire bricks or high alumina bricks upto 70-80% contact us. We are India based manufacturing company, established 1978 indulge in manufacturing all kinds of fire and acid proof bricks along with allied material. ranchirefractories.com
Brikmakers located in South Guildford, Western Australia, make solid clay bricks and their Geologist advises that their Standard Face Cream Smooths are ideal for pizza ovens with their composition being about 25% Alumina and 68% Silica. At only $195 for a pack of 264 bricks, that works out to about 73 cents a brick (pick up)
Folks in and around Central & Western Arkansas (USA) can find good quality firedbrick (9″x4″x2.5″- really 2 & 1/8″) at ACME BRICK Company at Malvern, AR. ($1.40/each as of FALL2009). also good source for fireclay mix (100# sack), “everset” mortar (high temp mortar mix for hearth construction w/ firebrick). If looking for vermiculite for insulation. can buy large quantity at reasonable price from MIDSOUTH CONTROL & SUPPLY of Fort Smith, AR (really Van Buren, AR). can follow along our oven construction at:
Dear Friends: We are an ISO certified manufacturer of fireclay bricks in China’s fireclay brick base Zibo City. Our quality and price is way more competitive. If you are interested to buy from China directly, please email me at [email protected] or MSN ID:[email protected]
I live at Sauble Beach on the Bruce Peninsula, 220kms NW of Toronto, Ontario. I can purchase refractory bricks from Shouldice Designer Stone for about $2.10 / 2-1/2 inch brick (in Metric equals to 64mm thick firebrick). They also supply the cement, thru my local building supply dealer, Miller Home Building Centre in Sauble. I should be starting building my oven approximately April 15, depending on delivery. Doug
Thermal Conductivity (K-Factor) Btu/in At a mean temperature of ft2hr°F W/m°C 400°F (205°C) 8.2 1.18 800°F (425°C) 8.5 1.23 1200°F (650°C) 9.0 1.30 1600°F (870°C) 9.2 1.33 2000°F (1095°C) 9.5 1.37 2400°F (1315°C) 9.8 1.41
TYPICAL CHEMICAL ANALYSIS, Wt. % (calcined basis) Silica (SiO2)…………….. 56.02 Aluminum Oxide (Al2O3) ……. 37.50 Iron Oxide (Fe2O3) ……….. 2.09 Titanium Dioxide (TiO2) …… 1.99 Potassium Oxide (K20) …….. 1.47 Magnesium Oxide (MgO) …….. 0.36 Calcium Oxide (CaO) ………. 0.30 Sodium Oxide (Na2O) ………. 0.074 Zirconium Dioxide (ZrO2) ….. 0.068 Chromium(III) Oxide (Cr2O3) .. 0.039 Phosphorous Pentoxide (P2O5) . 0.036 Manganese Oxide (MnO) …….. 0.007 NiO …………………….. 0.012 Total …………………… 99.97 Loss on Ignition, 1000°C ….. 0.13 We certify that SMITHFIELD (Unbranded) Dry Press Firebrick manufactured at our Alsey, Illinois plant conforms to ASTM Specification C-27 – Class 4.1.4 and 4.1.5 for Medium Duty and Low Duty respectively and C-1261-98 (which includes C- 24 and C-67), as well as, C-16, C-20, C-24, C-38, C-113, C-133