High strength phosphogypsum brick and manufacturing method thereof

A gypsum brick and high-strength technology, which is applied in the field of high-strength phosphogypsum brick and its production, can solve the problems of phosphogypsum brick strength, durability limitation, unsuitable for use in highway engineering and municipal engineering, etc., and achieves clear type composition and type composition Simple and durable results

Inactive Publication Date: 2014-03-19
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for making high-strength phosphogypsum bricks, which solves the problem that phosphogypsum bricks in the prior art are not suitable for highway engineering and municipal engineering due to limitations in strength and durability.

Method used

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  • High strength phosphogypsum brick and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare raw materials according to the batch test volume of 3000 pieces, 2000kg of phosphogypsum, 5300kg of yellow phosphorus slag, 150kg of quicklime, and 2550kg of fine aggregate.

[0037] First mix and grind the dried yellow phosphorus slag and quicklime; then uniformly measure and mix the mixed grinding material with phosphogypsum and fine aggregate; The brick body is made by a hydraulic vibration forming machine; the finished product is made by 1.35MPa saturated steam curing.

[0038] Test results:

[0039] Compressive strength: 45.3MPa;

[0040] Flexural strength: 12.1MPa;

[0041] Softening coefficient: 0.95;

[0042] Carbonization coefficient: 0.97;

[0043] Water Absorption: 13%.

Embodiment 2

[0045] Prepare raw materials according to the batch test volume of 3000 pieces, 3900kg of phosphogypsum, 4000kg of yellow phosphorus slag, 100kg of quicklime, and 2000kg of fine aggregate.

[0046] First mix and grind the dry yellow phosphorus slag and quicklime; then uniformly measure and mix the mixed grinding material with phosphogypsum and fine aggregate; The brick body is made by a hydraulic vibration forming machine; the finished product is made by 1.55MPa saturated steam curing.

[0047] Test results:

[0048] Compressive strength: 40.7MPa;

[0049] Flexural strength: 10.9MPa;

[0050] Softening coefficient: 0.88;

[0051] Carbonization coefficient: 0.97;

[0052] Water Absorption: 16%.

Embodiment 3

[0054] Prepare raw materials according to the batch test volume of 3000 pieces, 3000kg of phosphogypsum, 4000kg of yellow phosphorus slag, 100kg of quicklime, and 2900kg of fine aggregate.

[0055] First mix and grind the dry yellow phosphorus slag and quicklime; then uniformly measure and mix the mixed grinding material with phosphogypsum and fine aggregate; The brick body is made by a hydraulic vibration forming machine; the finished product is made by 1.45MPa saturated steam curing.

[0056] Test results:

[0057] Compressive strength: 43.3MPa;

[0058]Flexural strength: 6.9MPa;

[0059] Softening coefficient: 0.93;

[0060] Carbonization coefficient: 0.97;

[0061] Water Absorption: 13%.

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Abstract

The invention discloses a high strength phosphogypsum brick and manufacturing method thereof, and the product is made of phosphogypsum, yellow phosphorus slag, quicklime and fine aggregate; the manufacturing method comprises the following steps: mixing and grinding dry yellow phosphorus slag and quicklime; uniformly metering and mixing the mixedly grinded materials and phosphogypsum and fine aggregate; adding water into the mixed materials and stirring uniformly, controlling the water content content at 10%; manufacturing brick blanks by a hydraulic vibration forming machine; obtaining the finished product with saturated vapor at 1.35MPa. Compared with the prior art, the product is better than common high strength phosphogypsum brick, and the high strength phosphogypsum brick manufactured by the invention has the advantages of high intensity, good water resistance and good endurance; the compressive strength is between 30 and 45 MPa, and the flexural intensity is between 6.5 and 12.0 MPa, and the softening coefficient is between 0.85-0.95, and the carbonization coefficient is larger than 0.90, and the water absorption is less than 20%.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a high-strength phosphogypsum brick and a manufacturing method thereof. Background technique [0002] At present, domestic phosphorus chemical enterprises produce a large amount of phosphogypsum in the production process of wet-process phosphoric acid, which has caused adverse effects on the environment. According to incomplete statistics, the annual discharge of phosphogypsum waste residue in my country has reached more than 40 million tons, while the utilization rate is only 4.1%-4.5%. How to effectively deal with phosphogypsum residue has become a difficult problem for phosphorus chemical enterprises. [0003] Yellow phosphorus slag is the waste slag discharged from the following reactions during the production of yellow phosphorus by smelting apatite, quartz, and coke in an electric arc furnace at a high temperature of about 1600°C. At present, 8-10 tons of yellow phosphor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/04
CPCY02W30/91
Inventor 杨步雷杨永彬徐韦洪向前勇刘敏刘小成邹国军
Owner GUIZHOU KAILIN GRP CO LTD
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