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N144946 · 2011-08-18 — The tariff classification of refractory ceramic bricks from China.
The merchandise under consideration are bricks which you state are made of magnesia alumina carbon and will be used in steel mills. A sample brick was submitted with your ruling request and was forwarded to the U.S. Customs and Border Protection Laboratory for analysis. Laboratory analysis determined that the sample brick was made of refractory ceramic composed of 65% magnesium oxide and lesser amounts of compounds of aluminum, silicon, calcium, iron, iron, and titanium. The brick also contained carbon in the form of graphite, but did not contain any resin or pitch. From the information you…
N137857 · 2011-08-18 — The tariff classification of refractory ceramic bricks from China.
The merchandise under consideration are bricks which you state are made of fired magnesia. A sample brick was submitted with your ruling request and was forwarded to the U.S. Customs and Border Protection Laboratory for analysis. Laboratory analysis determined that the sample brick was made of refractory ceramic composed of approximately 96 percent magnesia, but no evidence was found of carbon, resin or pitch. From the information you provided, these bricks will be used in steel mills in furnace hearths and ladle safety. They will normally be subject to average temperatures of 2000 degrees…
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