Preparation method of nanometer-sized filler and fire-retardant magnesium aluminum hydroxide
A technology of nano-magnesium hydroxide and flame retardant, which is applied in the direction of magnesium hydroxide, aluminum oxide/aluminum hydroxide, etc., can solve the problems of lower production rate and lower solid content, and achieve low production cost, solve pollution, and improve process flow short effect
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Embodiment 1
[0026] Selection: 40 g of converter slag with a particle size of 0.04 mm is used as raw material (the components of converter slag are shown in Table 1) and 240 g of 10% sulfuric acid are reacted, the reaction temperature is 50 ° C, and the reaction time is 40 min; after filtration and separation, the solid phase contains silica Calcium sulfate can be used to prepare calcium sulfate whiskers; the pH value of the liquid phase is adjusted to 6 with magnesium oxide, the reaction temperature is controlled at 180 ° C, the holding time is 40 min, and the filter residue can be used to prepare iron oxide red; add alumina to the filtrate Sodium, to control the content of magnesium and aluminum ions in the solution after iron removal: Mg 2+ Content is 15%, Al 3+ The content is 10%, and the pH value is controlled to be 10; the mixture of polyethylene glycol and polyacrylamide ammonium is added to the reconciled solution, and the addition amount is 1%, and the solution is put into the rea...
Embodiment 2
[0031] Selection: use 40g of converter slag with a particle size of 0.074mm as raw material (the composition of converter slag is shown in Table 2) and react with 240g of 10% sulfuric acid, the reaction temperature is 90°C, and the reaction time is 60min; after filtration and separation, the solid phase contains silica Calcium sulfate can be used to prepare calcium sulfate whiskers; the pH of the solution is adjusted to 6 with magnesium carbonate in the liquid phase, the reaction temperature is controlled at 160 ° C, the holding time is 40 min, and the filter residue can be used to prepare iron oxide red; add alumina to the filtrate Sodium, to control the content of magnesium and aluminum ions in the solution after iron removal: Mg 2+ Content is 15%, Al 3+ The content is 10%, and the pH value is controlled to be 10; 1% polyacrylamide ammonium is added to the reconciled solution, and the solution is put into the reaction kettle, the temperature is controlled at 100°C, the press...
Embodiment 3
[0036] Selection: 40g of converter slag with a particle size of 0.09mm is used as raw material (the composition of converter slag is shown in Table 1) and 160g of 20% sulfuric acid is reacted, the reaction temperature is 80°C, and the reaction time is 45min; after filtration and separation, the solid phase contains silica Calcium sulfate can be used to prepare calcium sulfate whiskers; the pH value of the liquid phase is adjusted to 6 with magnesium oxide, the reaction temperature is controlled to 150 ° C, the holding time is 60 min, and the filter residue can be used to prepare iron oxide red; add alumina to the filtrate Sodium, to control the content of magnesium and aluminum ions in the solution after iron removal: Mg 2+ Content is 15%, Al 3+The content is 10%, and the pH value is controlled to be 9; polyacrylamide ammonium is added to the reconciled solution, the addition amount is 2%, and the solution is put into the reaction kettle, the temperature is controlled at 90°C,...
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