Magnesium-chromium composite spinelle brick
A magnesia-chromium spinel and spinel brick technology, which is applied in the field of magnesia-chromium composite spinel bricks, can solve problems such as increased production costs, and achieve improved spalling resistance, larger grain size, and strong corrosion resistance. Effect
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Embodiment 1
[0037] The magnesia-chrome composite spinel brick of the present invention is prepared from materials magnesia-chrome spinel sand, magnesia, chrome concentrate and chromium oxide according to the following steps:
[0038] The first step is to select the material by weight percentage as:
[0039] a. 1# Synthetic magnesia chrome spinel sand material:
[0040] Take MgO: 65; Cr 2 o 3 : 25; SiO 2 : 0.8; Fe 2 o 3 : 6; Al 2 o 3 : 2; CaO: 1.2;
[0041] b. 2# Synthetic magnesia chrome spinel sand material:
[0042] Take MgO: 55; Cr 2 o 3 : 35; SiO 2 : 0.8; Fe 2 o 3 : 6; Al 2 o 3 : 2; CaO: 1.2;
[0043] c. 3# Synthetic magnesia chrome spinel sand material:
[0044] Take MgO: 70; Cr 2 o 3 : 19; SiO 2 : 1.2; Fe 2 o 3 : 6; Al 2 o 3 : 3; CaO: 0.8;
[0045] d. Magnesia material:
[0046] Take MgO: 98; SiO 2 : 0.9; CaO: 0.9; Fe 2 o 3 : 0.2;
[0047] e. Chromium concentrate materials:
[0048] Take Cr 2 o 3 : 50; MgO: 15; SiO 2 : 1.5; CaO: 0.5; Fe 2 o 3 : 25...
Embodiment 2
[0065] The magnesia-chrome composite spinel brick of the present invention is prepared from materials magnesia-chrome spinel sand, magnesia, chrome concentrate and chromium oxide according to the following steps:
[0066] The first step is to select the material by weight percentage as:
[0067] a. 1# Synthetic magnesia chrome spinel sand material:
[0068] Take MgO: 70; Cr 2 o 3 : 20; SiO 2 : 1.2; Fe 2 o 3 : 4;AL 2 o 3 : 4; CaO: 0.8;
[0069] b. 2# Synthetic magnesia chrome spinel sand material:
[0070] Take MgO: 60; Cr 2 o 3 : 30; SiO 2 : 1.2; Fe 2 o 3 : 4;AL 2 o 3 : 4; CaO: 0.8;
[0071] c. 3# Synthetic magnesia chrome spinel sand material:
[0072] Take MgO: 75; Cr 2 o 3 : 14; SiO 2 : 1; Fe 2 o 3 : 4.5; AL 2 o 3 : 4; CaO: 1.5;
[0073] d. Magnesia material:
[0074] Take MgO: 97; SiO 2 : 1.3; CaO: 1.3; Fe 2 o 3 : 0.4;
[0075] e. Chromium concentrate materials:
[0076] Take Cr 2 o 3 : 60; MgO: 9; SiO 2 : 0.3; CaO: 0.7; Fe 2 o 3 : 15; ...
Embodiment 3
[0093] The magnesia-chrome composite spinel brick of the present invention is prepared from materials magnesia-chrome spinel sand, magnesia, chrome concentrate and chromium oxide according to the following steps:
[0094] The first step is to select the material by weight percentage as:
[0095] a. 1# Synthetic magnesia chrome spinel sand material:
[0096] Take MgO: 68; Cr 2 o 3 : 23; SiO 2 : 0.5; Fe 2 o 3 : 5; Al 2 o 3 : 3; CaO: 0.5;
[0097] b. 2# Synthetic magnesia chrome spinel sand material:
[0098] Take MgO: 58; Cr 2 o 3 : 33; SiO 2 : 0.5; Fe 2 o 3 :5;AL 2 o 3 : 3; CaO: 0.5;
[0099] c. 3# Synthetic magnesia chrome spinel sand material:
[0100] Take MgO: 72.5; Cr 2 o 3 : 16.5; SiO 2 : 0.8; Fe 2 o 3 :7;AL 2 o 3 : 2; CaO: 1.2;
[0101] d. Magnesia material:
[0102] Take MgO: 98.5; SiO 2 : 0.5; CaO: 0.5; Fe 2 o 3 : 0.5;
[0103] e. Chromium concentrate materials:
[0104] Take Cr 2 o 3 : 55; MgO: 12; SiO 2 : 1.0; CaO: 1.0; Fe 2 o 3 : ...
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