A kind of water-retaining brick and preparation method thereof
A technology of water bricks and grades, which is applied in the field of water-retaining bricks and its preparation, can solve the problems of iron tailings stockpiling and low utilization rate, and achieve the effects of reducing the phenomenon of heat island cities, reducing usage, and reducing mold
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[0032] The invention proposes a method for preparing water-retaining bricks. The raw materials used include iron tailings, waste glass, auxiliary materials, dispersants, foam stabilizers and foaming agents, and the raw materials are composed of 40-60% iron tailings by mass percentage , 30-50% waste glass, 1-10% auxiliary material, 0.1-0.5% dispersant, 1-7% foam stabilizer, 0.1-0.7% foaming agent, comprising the following steps:
[0033] S1. Crushing and mixing: crush iron tailings and waste glass to obtain mineral powder with a particle size of less than or equal to 200 meshes, add auxiliary materials, dispersants, foam stabilizers and foaming agents to the mineral powder to obtain a mixed material, and mix the mixed material The mass percentage of mineral powder is 80-95%.
[0034] S2. Wet milling the mixed material: After adding water to the mixed material, ball mill it in a ball mill to make a slurry, and then pour it into a spray dryer for spray drying to obtain a powder w...
Embodiment 1
[0059] The present embodiment provides a kind of preparation method of water-retaining brick, comprises the steps:
[0060] S1. Crush iron tailings and waste glass to obtain mineral powder with a particle size of 200 meshes. Add kaolin, triammonium citrate, sodium phosphate and carbon powder to the mineral powder to obtain a mixed material. Among them, the mass percent of each raw material in the mixed material is: 44% iron tailings, 50% waste glass, 2% kaolin, 0.5% triammonium citrate, 3% sodium phosphate, and 0.5% carbon powder.
[0061] S2. After adding water to the mixed material, mill it in a ball mill for 1 hour to make a slurry, wherein the mass percentage of water in the slurry is 45%, take the slurry out of the ball mill and continue to stir evenly, and then inject it into a spray dryer for further mixing. Spray drying to obtain a powder with a particle size of 150 μm. Preferably, in the process of preparing the slurry, the mass ratio of water, mixed material and bal...
Embodiment 2
[0065] The present embodiment provides a kind of preparation method of water-retaining brick, comprises the steps:
[0066] S1. Crush iron tailings and waste glass to obtain mineral powder with a particle size of 190 meshes. Add kaolin, triammonium citrate, sodium phosphate and coal powder to the mineral powder to obtain a mixed material. Among them, the mass percentage of each raw material in the mixed material is: iron tailings 55%, waste glass 32%, kaolin 7%, triammonium citrate 0.3%, sodium phosphate 5%, coal powder 0.7%.
[0067] S2. After adding water to the mixed material, ball mill it in a ball mill for 2 hours to make a slurry, wherein the mass percentage of water in the slurry is 45%, take the slurry out of the ball mill and continue to stir evenly, and then inject it into a spray dryer for further mixing. Spray drying to obtain a powder with a particle size of 200 μm. Preferably, in the process of preparing the slurry, the mass ratio of water, mixed material and ba...
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Abstract
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