Preparation method for slag cotton fiber board
A technology for fiberboard and slag wool, which is applied in the field of preparation of slag wool fiberboard, can solve the problems of rising raw material prices, restriction on the development of slag wool technology, reduction in production, etc., and achieves the effect of good cohesion and strength
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[0022] Preparation method of slag cotton fiber
[0023] Nitrogen jets are used to impact and crush liquid blast furnace slag. The liquid blast furnace slag flows out from the nozzle at a speed of 300-500g / min. The temperature of the liquid blast furnace slag is controlled at 1300°C. Air partial pressure is 5kg / cm 3 , the wind volume is 3m 3 / min, blast furnace slag is broken into blast furnace slag droplets by high-speed air flow, and then stretched into slag fibers. Under nitrogen cooling, the temperature is reduced to 100°C.
[0024] The cotton residue fiber that obtains comprises according to weight ratio:
[0025] SiO 2 32.2%; CaO 32.7%; MgO 9%; Al 2 o 3 14.5%;K 2 O 0.6%; Fe 2 o 3 7.4%; Na 2 O0.3%, the balance is S.
[0026] figure 1 Shown is the SEM photograph of the cotton residue fiber in the specific example of the present invention. It can be seen from the figure that the surface of the obtained fiber is smooth and cylindrical, and its diameter is 3-5 μ...
Embodiment 1
[0029] Preparation method of slag cotton fiberboard
[0030] (1), the slag cotton fiber obtained above is loosened, obtains loose cotton;
[0031] (2), the binding agent and water are stirred evenly, obtain viscous slurry, wherein binding agent is water glass, and the ratio of binding agent and water is 1 / 3;
[0032] (3), stirring and mixing the pine cotton and the viscous pulp, so that the viscous pulp is evenly distributed on the fiber surface to obtain a mixture;
[0033] (4) Add the mixture into the mold, apply a certain pressure to form, the forming pressure is 3500N, the forming time is 20 minutes, and the finished product is obtained after drying.
[0034] The components of water glass include:
[0035] Na 2 O 17.8%; SiO 2 42.3%; the balance is water.
[0036] The obtained fiberboard has good cohesiveness and strength.
Embodiment 2
[0038] Preparation method of slag cotton fiberboard
[0039] (1), the slag cotton fiber obtained above is loosened, obtains loose cotton;
[0040] (2), the binder and water are stirred evenly to obtain a viscous slurry, wherein the binder is water glass and sodium carboxymethyl cellulose solution, the ratio of the binder to water is 1 / 2, water glass and carboxymethyl cellulose The mass ratio of base cellulose sodium is 4:1;
[0041] (3), stirring and mixing the pine cotton and the viscous pulp, so that the viscous pulp is evenly distributed on the fiber surface to obtain a mixture;
[0042] (4) Add the mixture into the mold, apply a certain pressure to form, the forming pressure is 3500N, the forming time is 20 minutes, and the finished product is obtained after drying.
[0043] The mass fraction of sodium carboxymethyl cellulose solution is 3%.
[0044] The components of water glass include:
[0045] Na 2 O 17.8%; SiO 2 42.3%; the balance is water.
[0046] The obtain...
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Abstract
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