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Method for preparing cementitious materials with high mixing amounts of solid waste from quartzite slurry modified ardealite

A technology for cementing materials and phosphogypsum, which is applied in the field of preparing cementitious materials with high content of industrial solid waste, can solve problems such as adverse effects on the surrounding environment, and achieve the effects of improving comprehensive utilization rate, simple operation and shortening production cycle.

Active Publication Date: 2019-04-05
湖北冶金地质研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the grinding and polishing process of quartz stone, a large amount of mud is produced. In addition to a large amount of water and quartz powder, this mud also contains a small amount of unsaturated resin, methyl ethyl ketone peroxide, silane coupling agent, kraft paper fiber and other components. Negative effects on the surrounding environment

Method used

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  • Method for preparing cementitious materials with high mixing amounts of solid waste from quartzite slurry modified ardealite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix the prepared phosphogypsum powder, mineral powder, fly ash and cement according to the total mass of 20%, 15%, 10% and 55% respectively, add water according to the mass ratio of water and ash of 0.385:1, and stir to make a thick slurry. Prepare matrix slurry A1; mix silica fume and artificial quartz mud at a mass ratio of 1:5 (dry basis) to prepare activator B1; mix A1 and B1 at a mass ratio of 19:1 (dry basis) and stir evenly , to obtain slurry C1; add polyaluminum sulfate according to 0.1% of the dry basis mass of slurry C1, add polycarboxylate superplasticizer mother liquor according to 0.1% of the dry basis mass of slurry C1, and stir evenly to obtain good fluidity The cementitious material P1. Relevant properties are determined according to "GB / T1346-2011 Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Method" to determine the setting time, and according to "GB / T17671-1999 Cement Mortar Strength Test Method (ISO Method)" to measu...

Embodiment 2

[0032] Mix the prepared phosphogypsum powder, mineral powder, and cement according to the total mass of 25%, 25%, and 50% respectively, add water according to the water-to-ash mass ratio of 0.394:1, stir to make a thick slurry, and prepare the matrix slurry A2; Silica fume and artificial quartz mud are mixed uniformly by mass 2:5 (dry basis) to prepare activator B2; A2 and B2 are mixed and stirred evenly by mass 12:1 (dry basis) to prepare slurry C2; Add polyaluminum chloride at 0.2% of the dry basis mass of slurry C2, add polycarboxylate superplasticizer mother liquor at 0.3% of the dry basis mass of slurry C2, and stir evenly to obtain gelling material P2 with better fluidity. Relevant performance inspection method is with embodiment 1.

Embodiment 3

[0034]Mix the prepared phosphogypsum powder, fly ash and cement according to the total mass of 25%, 25% and 55% respectively, add water according to the mass ratio of water and ash of 0.376:1, stir to make a thick slurry, and prepare the matrix slurry A3; Mix silica fume and artificial quartz stone mud at a mass ratio of 2:5 (dry basis) to prepare activator B3; mix and stir A3 and B3 at a mass ratio of 12:1 (dry basis) to prepare slurry C3 Add polyaluminum chloride according to 0.1% of the dry basis mass of the slurry C3, add polycarboxylate superplasticizer mother liquor according to 0.5% of the dry basis mass of the slurry C3, and stir evenly to obtain the gelling material P3 with better fluidity . Relevant performance inspection method is with embodiment 1.

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Abstract

The invention provides a method for preparing building cementitious materials from ardealite by means of artificial quartzite slurry modification. The ardealite is industrial solid waste and is used as a main raw material for the building cementitious materials. The method includes drying and grinding the ardealite which is the industrial byproduct waste, uniformly mixing the ardealite, cement andindustrial byproducts such as slag powder and fly ash with one another to obtain mixtures, adding the mixtures into water and blending the mixtures and the water to obtain thick slurry; mixing silicafume with artificial quartzite slurry under high-speed stirring conditions and activating the artificial quartzite slurry; sufficiently mixing and homogenizing the thick slurry and the artificial quartzite slurry with each other, then adding polymeric aluminum and / or other aluminum salt and polycarboxylic acid water reducing agents into the thick slurry and the artificial quartzite slurry and uniformly stirring the polymeric aluminum and / or the other aluminum salt, the polycarboxylic acid water reducing agents, the thick slurry and the artificial quartzite slurry to obtain the plastic cementitious materials with short coagulation time and high strength and ardealite dosage. The silica fume is an industrial byproduct. The polymeric aluminum and / or the other aluminum salt are used as admixtures. The method has the advantages that the ardealite can be directly used after being dried and ground without earlier-stage purification and ageing treatment, accordingly, the production cycle canbe shortened to a great extent, and the cost can be reduced; the building cementitious materials are high in industrial solid waste mixing amount, the optimal industrial solid waste mixing amount canreach 80%, in other words, 80% of the traditional silicate cement can be replaced, and the method has important significance in saving resources, increasing the industrial solid waste comprehensive utilization rate and protecting environments.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of industrial solid waste resources, in particular to a method for preparing a high-volume industrial solid waste gelling material by modifying phosphogypsum with artificial quartz stone grinding and polishing mud. technical background [0002] Phosphogypsum is the solid waste discharged when phosphate rock and sulfuric acid are used as raw materials for wet production of phosphate fertilizer and phosphoric acid. It is acidic and produces about 4.5-5 tons of phosphogypsum for every 1 ton of phosphoric acid produced. In addition to the main component of calcium sulfate hydrate, its composition also contains a small amount of silicon, magnesium, iron, aluminum, phosphorus, fluorine and organic matter. With the rapid development of my country's agriculture and phosphate fertilizer industry, the discharge of phosphogypsum has been increasing year by year. As of 2015, the stockpile of phosphogy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/143C04B18/141C04B18/08C04B7/00C04B18/146C04B18/16C04B22/148C04B2103/302C04B22/12
Inventor 郭茂生胡修权张晋尤大海贺爱平李国栋张立陈梁彭兴华
Owner 湖北冶金地质研究所
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