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Bayer red mud cement accelerator and production method

A technology of quick-setting agent and Bayer red mud, applied in the field of Bayer red mud cement quick-setting agent, can solve the problems that have not been researched, and achieve the effects of protecting the environment, improving the later strength and reducing the production cost.

Active Publication Date: 2013-03-27
贵州亿维海逸环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no research on the method of using Bayer red mud to produce cement quick-setting agent in China.

Method used

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  • Bayer red mud cement accelerator and production method
  • Bayer red mud cement accelerator and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1, according to this accelerator proportioning: Bayer red mud sintered clinker: naphthalenesulfonic acid formaldehyde condensation polymer (FDN): triethanolamine (TEA): Bayer red mud: fly ash: hemihydrate gypsum=50 %: 10%: 1%: 20%: 14%: 5%.

[0068] Prepare 2 kg of sample, use 5 kg of ball mill to grind until 80% of 200 mesh sieve passes, take 20 g of quick-setting agent and add it to 400 g of cement, and add 168 ml of water according to the water-cement ratio of 0.4, stir rapidly for 25 seconds, immediately Put it into the round mold, manually vibrate several times, cut off the excess cement slurry, and smooth the surface with a clean scraper, use the cement slurry standard consistency and setting time tester to measure the initial setting time of the cement slurry for 4 minutes, and the final setting time for 8 minutes minute.

[0069] The compression test uses a 200kN compression testing machine and a 40mm (length) × 40mm (width) × 160mm (height) test mol...

Embodiment 2

[0070] Embodiment 2, according to this accelerator proportioning: Bayer red mud sintered clinker: naphthalenesulfonic acid formaldehyde condensation polymer (FDN): triethanolamine (TEA): Bayer red mud: fly ash: lime=55%: 8%:0.5%:15%:10%:11.5%. Prepare 2 kg of sample, use 5 kg of ball mill to grind until 80% of 200 mesh sieve passes, take 20 g of quick-setting agent and add it to 400 g of cement, and add 168 ml of water according to the water-cement ratio of 0.4, stir rapidly for 25 seconds, immediately Put it into the round mold, manually vibrate several times, cut off the excess cement slurry, and smooth the surface with a clean scraper, use the cement slurry standard consistency and setting time tester to measure the initial setting time of the cement slurry for 5 minutes, and the final setting time 7 minute.

[0071] The compression test uses a 200kN compression testing machine and a 40mm (length) × 40mm (width) × 160mm (height) test mold. The compressive strength ratio of...

Embodiment 3

[0072] Embodiment 3, according to this accelerator proportioning: Bayer red mud sintered clinker: naphthalenesulfonic acid formaldehyde condensation polymer (FDN): triethanolamine (TEA): Bayer red mud: fly ash: lime: hemihydrate gypsum =47%: 12%: 1%: 15%: 15%: 10%, prepare 2 kilograms of samples, adopt experimental 5 kilograms of ball mills to pass through 80% of 200 mesh sieves, get wherein 20g quick-setting agent and add in 400 grams of cement , and according to the water-cement ratio of 0.4, add 168 ml of water, stir rapidly for 25 seconds, immediately put it into the round mold, manually vibrate several times, cut off the excess cement slurry, and smooth the surface with a clean scraper. The setting time measuring instrument measures the initial setting time of the cement slurry for 3 minutes and the final setting time for 5 minutes.

[0073] The compression test uses a 200kN compression testing machine and a 40mm (length) × 40mm (width) × 160mm (height) test mold, and the...

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Abstract

The invention discloses a Bayer red mud cement accelerator, which comprises the following raw material by weight ratio, the ratio of Bayer red mud sintering clinker: naphthalene sulfonic acid formaldehyde condensation polymer (FDN): triethanolamine (TEA): Bayer red mud: fly ash: additive is 47-55% to 6-12% to 0.5-1.2% to 15-20% to 10-15% to 5-15%, and an additive is semi-hydrated gypsum and / or lime. The accelerator is prepared according to the following method, drying the Bayer red mud to prepare the Bayer red mud sintering clinker, weighting the components of each raw material according to weight, mixing the weighted raw materials, crushing and grinding, and sieving by a sieve with 200 meshes and packaging to prepare the Bayer red mud cement accelerator. According to the invention, the coagulation time can accord with a national building material current standard, and reduce the production cost of the cement accelerator, compared with a test piece 28d compressive strength with the Bayer red mud cement accelerator, the time intensity of the test piece 28d compressive strength without the Bayer red mud cement accelerator is increased by more than 85%, and the invention provides a feasible approach for comprehensive utilization of the Bayer red mud in an alumina industry.

Description

[technical field] [0001] The invention belongs to the technical field of comprehensive utilization of nonferrous metallurgy, environmental protection building materials and industrial waste residues, and relates to a method for comprehensive utilization of Bayer red mud waste discharged from the Bayer process alumina production process, in particular to the Bayer process alumina production process The formed industrial waste Bayer red mud is used as a raw material to prepare a Bayer red mud cement quick-setting agent and a production method thereof. [Background technique] [0002] At present, in the field of nonferrous metallurgy industry, the Bayer process and sintering process or the series (mixed connection) of the two processes are still used to produce alumina. In my country, 85% of alumina products come from the Bayer process, and the production of alumina by the Bayer process is still the mainstream production method in the world today. The Bayer red mud referred to ...

Claims

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Application Information

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IPC IPC(8): C04B24/22C04B103/12
Inventor 鄢金松杨家宽张泽林
Owner 贵州亿维海逸环保科技有限公司
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