Electrolytic manganese residue-red mud cement and preparation method thereof

[0015] The preparation method of electrolytic manganese slag-red mud cement of the present invention may include material preparation, first calcination, preparation of slurry, baking, second calcination, and third calcination.

[0016] In detail, the above-mentioned materials may include 30-60 parts by weight of manganese slag, 10-20 parts by weight of red mud, 3-5 parts by weight of slag powder, 3-8 parts by weight of alkaline modifier, 3-5 parts by weight of cement raw meal, 25-30 parts by weight of cement clinker and 1-3 parts by weight of water reducing agent.

[0017] The above-mentioned first calcination may include mixing manganese slag and slag powder, and calcination at a temperature of 400-500° C. to obtain the first calcination product. Preferably, the first calcination time can be 1-2h, and the particle size of manganese slag and slag powder can be 200-300 mesh.

[0018] The first calcined product and red mud obtained after the first calcining are added to water, and then

[0025] Example 1

[0026] Preparation: 30 parts by weight of manganese slag, 10 parts by weight of red mud, 5 parts by weight of slag powder, 3 parts by weight of alkaline modifier, 5 parts by weight of cement raw meal, 25 parts by weight of cement clinker and 1 Parts by weight of water reducing agent; among them, the alkaline modifier is CaO, and the water reducing agent is NaSiO 4 .

[0027] After mixing manganese slag (300 mesh) and slag powder (200 mesh), they are calcined at a temperature of 400° C. for 2 hours to obtain the first calcined product.

[0028] Add the first calcined product and red mud to water at a temperature of 90°C and stir at a stirring speed of 1000r / min. After stirring for 5 minutes, add an alkaline modifier and continue stirring. The total stirring time is 30min, and keep the temperature of the mixture at 90°C during the stirring process to obtain a slurry.

[0029] After the slurry is allowed to stand and settle, the water in the upper layer is removed, and

[0032] Example 2

[0033] Material preparation: 60 parts by weight of manganese slag, 20 parts by weight of red mud, 3 parts by weight of slag powder, 8 parts by weight of alkaline modifier, 3 parts by weight of cement raw meal, 30 parts by weight of cement clinker and 3 parts by weight Parts by weight of water reducing agent; among them, the alkaline modifier is MgO and the water reducing agent is NaSiO 4 And a mixture of sodium carboxylate.

[0034] After mixing manganese slag (200 mesh) and slag powder (300 mesh), they are calcined at a temperature of 500° C. for 1 h to obtain the first calcined product.

[0035] Add the first calcined product and red mud to water at a temperature of 120°C and stir at a stirring speed of 500r / min. After stirring for 10 minutes, add an alkaline modifier and continue stirring. The total stirring time is 60min, and keep the temperature of the mixture at 110°C during the stirring process to obtain a slurry.

[0036] After the slurry is allowed to stand