A copy of the ruling or the control number indicated above should be provided with the entry documents filed at the time this merchandise is imported. This ruling is being issued under the provisions of Part 177 of the Customs Regulations (19 C.F.R. The text of the most recent HTSUS and the accompanying duty rates are provided on the World Wide Web at.
#Tabular alumina code
Information on the TSCA can be obtained by contacting the EPA at 1200 Pennsylvania Avenue, N.W., Mail Code 70480, Washington, D.C., by telephone at (202) 554-1404, or by visiting their website at Duty rates are provided for your convenience and are subject to change. This merchandise may be subject to the requirements of the Toxic Substances Control Act (TSCA), which are administered by the U.S. The applicable subheading for “Tabular Alumina” will be 28, Harmonized Tariff Schedule of the United States (HTSUS), which provides for Artificial corundum, whether or not chemically defined aluminum oxide aluminum hydroxide: Aluminum oxide, other than artificial corundum. You further state that this product is sintered and not melted (fused) in electric arc furnaces as is the case with artificial corundum. After calcination, the spheres of sintered alumina can be used as they are for some applications, or they can be crushed, screened, and ground to produce a wide range of sizes. You explain that this product is produced by pelletizing, extruding, or pressing calcined alumina into shapes and then heating these shapes to a temperature just under their fusion point. McDonald: In your letter dated February 27, 2019, you requested a tariff classification ruling on “Tabular Alumina.” In your submission, you describe the product at issue as tabular aluminum oxide. RE: The tariff classification of “Tabular Alumina” from Russia Dear Ms.
Noreen McDonald 825 Third Avenue New York, NY 10022 Milling: Ball milling into different size on request: 0.5-1 mm/ 0-0.5 mm/ 0.2-0.6 mm/ 0-0.2 mm/ 200 mesh/ 325 mesh/ 400 mesh etc.Ĭontact me (Cell phone/ Whatsapp/ Wechat: 008618783862220) if you have other sizes requested. Sand making: Send the ready cooled raw balls to the Barmac sand making machine for crushing, sand making, magnetic separation (removal of iron filings from mechanical iron-equipment), sieving. Preparation for sand making: Use air-cooling treatment to cool the sintered raw ball below 100 degrees. Wind-cooled: Air-cooled below the fifth section, the temperature of the sintered cooked balls is 400 degrees when they are out of the oven. High temperature sintering: In the sixth section, the temperature quickly rose to 1950 degrees (the highest temperature). The roof of the kiln is preheated-the tenth section is 100 degrees, and then it falls freely (the falling speed is controlled by the system). Warm up: The shaft kiln is divided into ten sections from top to bottom according to the temperature range, 10-1 from top to bottom. Sintering characteristics: rapid heating and coolingįeed: Lift the dried raw balls to the top of the shaft kiln through the lifting device. Sintering equipment: natural gas shaft kiln The whole processing time needs about 3 hours.ĭrying equipment: natural gas drying tower Use 60# Industry Alumina Powder normally imported from Australia, grint it into 380# fine powder by ceramic ball bill.Īdding water into 380# fine powder, and put them into the ball tube to make the raw balls, its diameter is normally 2.4 cm min. Tabular Alumina Market Forecast to 2028 - COVID-19 Impact and Global Analysis by Application (Refractory, Abrasives, Oil and gas) and Geography Description. Production process and Flow chart of Tabular Alumina? Tabular Alumina has good thermal shock stability and bending strength after the production of high temperature treatment. With high purity, good volume stability, and minimal re-fire shrinkage, Tabular Alumina performs good as the refractory materials or castables. Crystal structure, with small pores and many closed pores, and the porosity is roughly equivalent to that of Fused Alumina. It has coarse crystals and a well-developed α-Al2O3 crystal structure. Tabular Alumina, sometimes called TWA, is a pure, sintered corundum that does not add any additives such as MgO, B2O3, and shrinks completely. ZIRCAR Ceramics Tabular Alumina Type TAB-99 Balls and Gravel are high-density, high-purity Alumina in the Alpha-Alumina crystal phase.
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