Unlock instant, AI-driven research and patent intelligence for your innovation.

Compound modified gypsum block and preparation method thereof

A technology for compound modification of gypsum blocks, applied in the field of gypsum blocks and modified phosphogypsum blocks, can solve the problems of unfavorable large-scale production, surrounding environmental pollution, long processing cycle, etc., to increase environmental protection capabilities, shorten The effect of low construction period and production cost

Inactive Publication Date: 2017-02-01
王远国
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of accumulation of phosphogypsum not only occupies land, but also wastes resources. The acidic components and other harmful substances contained in it are easy to cause serious pollution to the surrounding environment. , the urgent need to reduce environmental pollution
[0005] In the prior art, the application of phosphogypsum as a wall material is mostly through the process of adding complex auxiliary components to phosphogypsum to achieve deacidification and coagulation acceleration, and then aging or recrystallizing the mixed material , the ingredients added are usually more complex, the processing cycle is longer, and the control is more difficult, which is not conducive to large-scale industrial production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Burn 360kg of phosphogypsum at 500°C until the material temperature reaches 150°C;

[0042] (2) Grinding the burnt phosphogypsum to 300 mesh;

[0043] (3) Add 78kg of water, ground phosphogypsum, 54kg of cement, and 108kg of water slag to the mixing equipment in sequence at 15°C for mechanical stirring. The stirring frequency is 2800r / min, the stirring time is 1min, and the power of the stirring motor is 5.5kW , the cement used is general-purpose cement with a label of 52.5, and the water slag used is the waste water slag purchased from Dagang Rebar;

[0044] (4) Pour the mixture obtained in step (3) into a mold coated with a film coating agent within 60 seconds and mold it for 9 minutes. The release agent is 95wt% boiling saturated soapy water and 5wt% engine oil dissolved in it, and then Demoulding, drying at 60°C until the water content is 5%, the composite modified gypsum block is obtained;

[0045] A number of samples of composite modified gypsum blocks were ...

Embodiment 2

[0048] (1) Burn 480kg of phosphogypsum at 750°C until the material temperature reaches 300°C;

[0049] (2) Grinding the burnt phosphogypsum to 500 mesh;

[0050] (3) Add 6kg of water, ground phosphogypsum, 54kg of cement, and 60kg of water slag to the stirring equipment in sequence at 50°C for mechanical stirring. The stirring frequency is 2700r / min, the stirring time is 3min, and the power of the stirring motor is 6kW. The cement used is general-purpose cement with a label of 42.5, and the water slag used is the waste water slag purchased from Dagang Rebar;

[0051](4) Pour the mixture obtained in step (3) into a mold coated with a coating agent within 30s and mold it for 6 minutes. The release agent is 95wt% boiling saturated soapy water and 5wt% machine oil dissolved in it, and then Demoulding, drying at 50°C until the water content is 2%, the composite modified gypsum block is obtained;

[0052] A number of samples of composite modified gypsum blocks were randomly select...

Embodiment 3

[0055] (1) Burn 360kg of phosphogypsum at 600°C until the material temperature reaches 250°C;

[0056] (2) Grinding the burnt phosphogypsum to 400 mesh;

[0057] (3) Add 54kg of water, ground phosphogypsum, 126kg of cement, and 60kg of water slag to the mixing equipment in sequence at 30°C for mechanical stirring. The stirring frequency is 2500r / min, the stirring time is 2min, and the power of the stirring motor is 5kW. The cement used is general-purpose cement with a label of 42.5, and the water slag used is the waste water slag purchased from Dagang Rebar;

[0058] (4) Pour the mixture obtained in step (3) into a mold coated with a film coating agent within 40 seconds and form it for 8 minutes. The release agent is 90wt% boiling saturated soapy water and 10wt% machine oil dissolved in it, and then Demoulding, drying at 65°C until the moisture content is 3%, the composite modified gypsum block is obtained;

[0059] A number of samples of composite modified gypsum blocks wer...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Flatnessaaaaaaaaaa
Apparent densityaaaaaaaaaa
Apparent densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a compound modified gypsum block and a preparation method thereof. The preparation method comprises the following steps: firing phosphogypsum at a temperature of 500-750 DEG C until the temperature of the phosphogypsum is within 150-300 DEG C, and then grinding the fired phosphogypsum; further mixing the phosphogypsum powder with cement, water granulated slags and water, thereby obtaining a mixture; and finally mould-pressing, demoulding and drying the mixture, thereby obtaining the compound modified gypsum block. According to the preparation method, industrial waste can be effectively utilized, health and environmental friendliness are achieved, and large-scale industrial production can be performed; the obtained product is good in processability, low in production cost and excellent in use performance.

Description

technical field [0001] The invention relates to the technical field of gypsum blocks, in particular to the technical field of modified phosphogypsum blocks. Background technique [0002] my country is the largest developing country in the world, with 7% of the world's arable land raising about 20% of the world's population, land resources are very precious, and a large number of wall materials used in the rapid development of urban and rural construction, such as solid clay bricks However, a large amount of land is required, which creates a significant contradiction with the shortage of land resources. [0003] In order to solve this problem, new wall materials have been extensively researched and promoted. By 2015, the proportion of new wall materials in the country will increase to more than 65%, and the proportion of construction applications will reach more than 75%. The production capacity of new wall materials Consumption is reduced by 20%, and further promoting the in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B28/14C04B11/02C04B11/26C04B11/00B28C5/00B28B3/00
CPCB28B3/00B28C5/003C04B11/005C04B11/02C04B11/26C04B28/143C04B2201/20C04B2201/50C04B18/142C04B22/002C04B7/00
Inventor 王远国
Owner 王远国