Unfired ceramsite with sodium silicate-bonded sand dust and carbide slag as excitants and preparation of unfired ceramsite

A water glass sand and calcium carbide slag technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of high manufacturing cost, high price, and incapability of large-scale application of non-fired ceramsite, and achieve good results and high performance. Economical, performance green and environmental protection

Pending Publication Date: 2022-03-22
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current unfired ceramsite needs to add a certain amount of alkaline activator, such as NaOH, KOH, water glass, etc

Method used

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  • Unfired ceramsite with sodium silicate-bonded sand dust and carbide slag as excitants and preparation of unfired ceramsite
  • Unfired ceramsite with sodium silicate-bonded sand dust and carbide slag as excitants and preparation of unfired ceramsite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First put about 4.5kg of wet-based carbide slag into an oven and dry at 105°C for 12 hours to constant weight, then cool down to room temperature, then take 3.0kg of dry calcium carbide slag and 10.0kg of sodium silicate sand dust, mix them and put them into a ball mill for ball milling 12min, pre-activated for later use; weigh 3.0kg of fly ash, 5.0kg of mineral powder, 2.0kg of red mud and mix them with the ball-milled powder, and stir at a speed of 500r / min for 5min to mix evenly; take 200g of the mixed powder to the ceramsite In the machine, use a sprayer to spray intermittently 10-15 times to roll into microspheres, continue to spray a small amount of water to make the surface of the microspheres just wet but not stick together, then add a small amount of powder to wrap the surface of the microspheres, and spray repeatedly The process of water, adding materials, and rolling the ball is prepared into a ceramsite embryo body with a water content of 20% and a diameter o...

Embodiment 2

[0043] First put about 3.5kg of calcium carbide slag on a wet basis into an oven and dry at 105°C for 12 hours to constant weight, then cool to room temperature, then take 2.0kg of dry calcium carbide slag and 10.0kg of water glass sand dust, mix them and put them into a ball mill for ball milling 10min, pre-activated for later use; weigh 5.0kg of fly ash, 3.0kg of mineral powder, 2.0kg of red mud and mix them with the ball-milled powder, and stir at a speed of 500r / min for 5min to mix evenly; take 200g of the mixed powder to the ceramsite In the machine, use a sprayer to spray intermittently 10-15 times to roll into microspheres, continue to spray a small amount of water to make the surface of the microspheres just wet but not stick together, then add a small amount of powder to wrap the surface of the microspheres, and spray repeatedly The process of water, adding materials, and rolling the ball is prepared into a ceramsite embryo body with a water content of 20% and a diamet...

Embodiment 3

[0045]First put about 2.5kg of calcium carbide slag on a wet basis into an oven and dry at 105°C for 12 hours to constant weight, then cool to room temperature, then take 1.0kg of dry calcium carbide slag and 10.0kg of water glass sand dust, mix them and put them into a ball mill for ball milling 8min, pre-activated for later use; weigh 5.0kg of fly ash, 2.0kg of mineral powder, 3.0kg of red mud and mix them with the ball-milled powder, and stir at a speed of 500r / min for 5min to mix evenly; take 200g of the mixed powder to the ceramsite In the machine, use a sprayer to spray intermittently 10-15 times to roll into microspheres, continue to spray a small amount of water to make the surface of the microspheres just wet but not stick together, then add a small amount of powder to wrap the surface of the microspheres, and spray repeatedly The process of water, adding materials, and rolling the ball is prepared into a ceramsite embryo body with a water content of 20% and a diameter...

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Abstract

The invention discloses unfired ceramsite with sodium silicate-bonded sand dust and carbide slag as excitants and preparation of the unfired ceramsite, and belongs to the technical field of solid waste and hazardous waste resource recycling. The unfired ceramsite disclosed by the invention comprises the following components: 10%-50% of sodium silicate sand dust, 4%-15% of carbide slag and the balance of a material with volcanic ash activity. The preparation method comprises the following steps: ball-milling the sodium silicate sand dust and the dried carbide slag together, mixing the ball-milled powder with the fly ash, the mineral powder, the red mud and other materials with volcanic ash activity, uniformly stirring to obtain mixed powder, then carrying out ball rolling molding by using a ball rolling machine to prepare a ceramsite blank, and standing and curing to obtain the medium-high strength unfired ceramsite with good performance. According to the invention, the sodium silicate sand dust and the carbide slag are used as excitants to replace an alkali activator which is high in price and used in the traditional unfired ceramsite, so that the preparation cost of the unfired ceramsite is greatly reduced, and the unfired ceramsite with relatively high economic benefits is obtained.

Description

technical field [0001] The invention belongs to the technical field of recovery and utilization of solid waste and hazardous waste resources, and relates to the recovery and utilization of dust produced by crushing and regeneration of water glass sand, in particular to unfired ceramsite using water glass sand dust and carbide slag as activators and its preparation. Background technique [0002] Sodium silicate sand has to go through crushing, screening and other processes in the process of dry and wet regeneration, and a large amount of dust will be generated in this process. Dry regeneration is to heat and burn the water glass sand to make the hardened water glass film on the surface brittle, and then the water glass film on the surface will fall off under the action of mechanical friction. This process will produce a large amount of alkaline powder. As a big foundry country, China produces as much as one million tons of water glass sand dust every year. These powders are s...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B28/02
CPCC04B38/009C04B28/021C04B18/08C04B18/0409C04B18/14C04B18/0481C04B22/062
Inventor 赵庆新邱永祥石雨轩郭维超
Owner YANSHAN UNIV
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