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Refractory ball and preparation method thereof
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A technology of refractory balls and firing temperature, applied in the field of refractory materials, can solve the problems of short service life, high cost of use, and easy breakage of silicon balls
Inactive Publication Date: 2012-06-27
赵仲生
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Problems solved by technology
The above two refractory balls have certain shortcomings, among which the silicon ball is easy to break, and the high alumina ball is easy to bond at high temperature.
Therefore, the above two refractory balls have the disadvantages of short service life and high cost of use.
Method used
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Embodiment 1
[0012] Embodiment 1: The refractory ball adopts the following raw materials to make: bauxite 66kg, silica 33kg, calcium lignosulfonate (wood calcium) 1kg.
[0013] Preparation method: pulverize bauxite and silica, mix uniformly with a total weight of 1wt% refractory agent, and then use a press to form a semi-finished product; then burn at 1350°C for 30 hours to obtain the refractory ball.
[0014] After testing, the obtained refractory balls contain Al 2 o 3 66wt%, SiO 2 33wt%; softening temperature under load (100N*0.6) is 1509°C, refractoriness is 1960°C. The softening temperature under load is tested according to YB / T 370-1995 test method for softening temperature under load of refractory products (non-differential-temperature rising method), and the refractoriness is tested according to GB / T7322-2007 test method for refractoriness of refractory materials.
Embodiment 2
[0015] Embodiment 2: The refractory ball is made of the following raw materials: bauxite 58kg, silica 41kg, calcium lignosulfonate 1kg.
[0016] Preparation method: pulverize bauxite and silica, and then use a press to form a semi-finished product; then burn at 1300°C for 24 hours to obtain the refractory ball.
[0017] After testing, the obtained refractory balls contain Al 2 o 3 57wt%, SiO 2 41wt%; softening temperature under load (100N*0.6) is 1478°C, refractoriness is 1930°C.
Embodiment 3
[0018] Embodiment 3: The refractory ball is made of the following raw materials: bauxite 71kg, silica 28kg, calcium lignosulfonate 1kg.
[0019] Preparation method: pulverize bauxite and silica, and then use a press to form a semi-finished product; then burn at 1400 ° C for 36 hours to obtain the refractory ball.
[0020] After testing, the obtained refractory balls contain Al 2 o 3 71wt%, SiO 2 28wt%; softening temperature under load (100N*0.6) is 1469°C, refractoriness is 1880°C.
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Abstract
The invention discloses a refractory ball and a preparation method thereof. The refractory ball is prepared from the following raw materials in percentage by weight: 58 to 71 percent of bauxite, 28 to 41 percent of silica and 0.5 to 1.5 percent of binding agent. Al2O3 and SiO2 in the refractory ball are fired together, the refractoriness under load of the refractory ball is more than 1,450 DEG C, the refractoriness of the refractory ball is more than 1,800 DEG C, and other indexes of the refractory ball meet the requirement of GB / T 23294-2009 abrasion resistant refractory materials.
Description
technical field [0001] The invention relates to a refractory material, in particular to a refractory ball used in the iron and steel industry and a preparation method thereof. Background technique [0002] Refractory balls are used as refractory materials in hot blast stoves in the steel industry. The existing refractory balls are divided into silicon balls and high alumina balls. The two above-mentioned refractory balls all have certain deficiencies, among which silicon balls are easily broken, and high-alumina balls are easy to bond at high temperatures. Therefore, the above two refractory balls have the disadvantages of short service life and high cost of use. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a refractory ball that is not easy to be broken and bonded at high temperature and its preparation method, so as to increase its service life. [0004] In order to solve the above-mentioned technical prob...
Claims
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Application Information
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