Method for using artificial agglomerated stone cuttings to prepare gypsum board

A technology of artificial granite and cutting chips, which is applied in the field of resource recycling, can solve problems such as land occupation, environmental pollution, and harm to human health, and achieve the effects of meeting social needs, generating economic benefits, and novel methods

Active Publication Date: 2018-08-10
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing artificial stone cuttings that occupy land, pollute the environment, and endanger human health, the embodiment of the present application provides a method for preparing gypsum board with artificial stone cuttings. Cutting chips are used as raw materials, and the gypsum powder whose strength can meet the industrial requirements is prepared by the method of acidification and oxidation reaction synthesis, which can not only generate economic benefits, but also dispose of artificial granite cutting chips, killing two birds with one stone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Screen artificial granite cuttings, remove impurities, and pulverize to obtain raw material particles with a particle size of 100 mesh; according to the mass ratio of raw material particles to concentrated sulfuric acid as 1:0.8, slowly add concentrated sulfuric acid with a concentration of 98% to the raw material particles and stir for 60 minutes, to obtain dry powder particles; according to the mass ratio of dry powder particles and dilute sulfuric acid as 1:0.4, slowly add concentration to dry powder particles and be 50% dilute sulfuric acid, stir for 30 minutes under the number of revolutions of 500r / min, leave standstill for 4 minutes after stirring hours, filter, collect the filter cake, dry for 10 hours, take out the dried filter cake and disperse it in a disperser, then put it in an oven at 130°C and dry it for 4 hours to prepare gypsum powder; in gypsum powder Add 0.5% gypsum powder citric acid retarder and 0.5% gypsum powder sodium lignosulfonate superplasticiz...

Embodiment 2

[0029] On the basis of Example 1, in this example, the concentration of concentrated sulfuric acid used is 92%, the concentration of dilute sulfuric acid is 60%, the mass ratio of raw material particles to concentrated sulfuric acid is 1:0.6, the mass ratio of dry powder particles to dilute sulfuric acid The ratio is 1:0.6, and the other parts are completely consistent with Example 1. The obtained gypsum board is tested, and the flexural strength is 3.20MPa, and the compressive strength is 13.20MPa.

Embodiment 3

[0031] On the basis of Example 1, in this example, the concentration of concentrated sulfuric acid used is 99%, the concentration of dilute sulfuric acid is 40%, the mass ratio of raw material particles to concentrated sulfuric acid is 1:1.5, the mass ratio of dry powder particles to dilute sulfuric acid The ratio is 1:0.1, and the other parts are exactly the same as in Example 1. The obtained gypsum board is tested, and the flexural strength is 3.15MPa, and the compressive strength is 13.00MPa.

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Abstract

The invention provides a method for using artificial agglomerated stone cuttings to prepare a gypsum board, and relates to the technical field of resource recycling. The method comprises the followingsteps of sifting the artificial agglomerated stone cuttings, removing impurities, and smashing to obtain raw material particles; slowing adding concentrated sulfuric acid into the raw material particles and uniformly stirring to obtain dry powder particles; slowly adding dilute sulphuric acid into the dry powder particles, stirring, filtering, collecting filtrate cake, and drying and smashing toobtain gypsum powder; adding retarder and water reducing agent into the gypsum powder, uniformly stirring, placing the mixture into a grinding apparatus to be formed, standing, demolding, and drying to obtain the gypsum board. The method is novel, and is feasible in operation in actual industrial production; therefore, the method has a positive promoting effect in development of the industry of artificial stone and other relevant industries; meanwhile, corresponding building materials are prepared, the social requirement is met, and the call of energy conservation, emission reduction, and environmental protection of our country is answered.

Description

technical field [0001] The invention belongs to the technical field of resource recovery and utilization, and in particular relates to a method for preparing gypsum boards from cutting chips of artificial granite. Background technique [0002] Artificial granite, also known as synthetic stone, reconstituted stone, engineering stone. It refers to the use of natural marble chips and stone powder as the main raw materials, organic resin (such as unsaturated polyester resin) as the binder, adding an appropriate amount of curing aids, pigments, etc., through vacuum high-pressure stirring, high-frequency oscillation molding, and then Synthetic stone made after curing at room temperature, demoulding, polishing and other processes. It has the advantages of light weight, pollution resistance, corrosion resistance and convenient construction. The main phase composition of artificial granite is calcite, containing a small amount of dolomite; the main chemical composition is calcium c...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C04B11/26C04B28/14
CPCC04B11/26C04B28/14C04B24/18C04B24/06
Inventor王丽娟杜高翔刘彦明邹雪群
OwnerCHINA UNIV OF GEOSCIENCES (BEIJING)