Slag thistle board and preparation method thereof
A light-weight board and steel slag technology, which is applied in cement production, etc., can solve the problems of high cost, low addition amount, and difficult application in production practice, etc., and achieve the effect of low bulk density, simple ingredients, and stable reaction results
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Embodiment 1
[0018] Steel slag tailings are used as calcareous raw materials, and analytically pure silica is used as siliceous raw materials. The main component content of the steel slag tailings is 6.04% Al 2 o 3 , 18.89% SiO 2 , 18.72% Fe 2 o 3 , 33.7% CaO, 7.69% MgO, 0.66% Na 2 O. The steel slag is ground and passed through a 100-mesh sieve, and then mixed with analytical pure silica at a mass ratio of 6:1. The mixed fine material is mixed with Na 2 O concentration is 10g / L dilute lye is mixed with the ratio of mass ratio 1: 7, adds appropriate amount of NaCl as reaction aid, and the mass ratio of described NaCl and fine material after mixing is 1: 100; Put the slurry in a closed reactor and heat it up to 200°C. During the reaction process, continue to stir fully. After 7 hours of heat preservation reaction, cool down to normal pressure, release the slurry, and then filter; press the obtained wet residue with a selected mold, and the molding pressure is 0.5MPa; Finally, dry the m...
Embodiment 2
[0020] Select the same raw materials as in Example 1, make a slurry according to the same proportion, and react under the same conditions. The obtained wet slag is pressed and molded under the condition of 6MPa with the same mold, and then placed in a drying oven at 90 ° C. After drying for 5 hours, the obtained material has a bulk density of 1475Kg / m3 and a compressive strength of 34.04MPa.
Embodiment 3
[0022] The steel slag tailings different from the above two examples are selected as the calcareous raw material, and its composition content is 4.58% Al 2 o 3 , 17.35% SiO 2 , 18.67% Fe 2 o 3 , 33.5% CaO, 0.26% MgO, 5.56% Na 2 O; The siliceous raw material is still analytically pure silica. Grind steel slag through a 100-mesh sieve, then mix it with analytically pure silica at a mass ratio of 9:1, mix the mixed fine material with Na 2 O concentration is that the dilute lye of 20g / L mixes according to the mass ratio of 1: 10, and puts into the Na of 5% of fine material quality after mixing. 2 SO 4 As a reaction aid; put the prepared slurry into a closed reactor and heat up to 180°C, continue to stir fully during the reaction, keep warm for 8 hours, cool down to normal pressure, release the slurry, and then filter; The fixed mold is pressed and formed with a forming pressure of 2MPa; the formed product is dried in a drying oven at 110°C for 2 hours, and the obtained mate...
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