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Method for preparing outer wall furring brick by utilizing ardealite as raw material

A technology of exterior wall veneer bricks and a process method, which is applied in the fields of industrial waste utilization and building decoration materials, can solve the problems of high process cost, unreported research, inability to effectively consume phosphogypsum, etc., and achieves low sintering temperature and energy consumption. low effect

Inactive Publication Date: 2016-02-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is the most ideal way of resource utilization of phosphogypsum, but the current process cost is still high, and the economic value is not large; (5) the weak acidity of its soluble phosphorus impurities is used as an alkaline soil conditioner, but the scope of application is limited. Very limited; (6) Used as a sulfur and phosphorus fertilizer, the utility is limited
[0004] It can be seen from the above that the existing phosphogypsum utilization methods cannot effectively consume a large amount of industrial waste phosphogypsum
At present, there is no report on the research on the use of phosphogypsum to make ceramic veneer bricks for exterior walls

Method used

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  • Method for preparing outer wall furring brick by utilizing ardealite as raw material
  • Method for preparing outer wall furring brick by utilizing ardealite as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take the phosphogypsum produced by an enterprise in Guizhou, after drying, grinding, 80-mesh sieving, and dehydration at 450°C for 30min, add 5% formula to get 31.51% B 2 o 3 , 2.73% ZnO, 4.19% MgO, 6.36% CaO, 42.29% potassium feldspar, 10.24% ZrO 2 sintering aid, mixed, molded at 20MPa, sintered at 1000°C for 3h, glazed at 950°C for 30min. The flexural strength (breaking strength) of the obtained glazed phosphogypsum ceramic veneer brick sample is 34.09 ± 0.22MPa, and the water absorption rate<2%, has reached the national standard for fine stoneware bricks in dry-pressed ceramics; The 10 samples in the practical form were intact after 100 freeze-thaw cycles; in the thermal shock resistance test, the 10 samples in the test were also intact after 10 thermal shock cycles, which can fully meet the external requirements. Requirements for the use of wall veneer bricks.

Embodiment 2

[0026] Take the phosphogypsum produced by an enterprise in Anhui, after drying, grinding, 80-mesh sieving, dehydration at 450℃×30min, add 5% formula to make 62.5% SiO 2 , 2.5%Al 2 o 3 , 5.0% B 2 o 3 , 7.0% CaO, 7.0% ZnO, 14.0% Na 2 O, 5.0% Na 2 SiF 6 sintering aids, mixed well, molded at 20MPa, and the obtained compact was sintered at 950°C for 1h, and glazed at 950°C for 30min. The flexural strength of the obtained glazed phosphogypsum ceramic veneer brick sample was 30.73±0.49MPa, and the water absorption rate was less than 2%, which reached the national standard for fine stoneware dry-pressed ceramic tiles; After 100 freeze-thaw cycles of 10 samples, only one sample cracked, and the rest of the samples were undamaged; in the thermal shock resistance test, the 10 samples tested were intact after 10 thermal shock cycles .

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Abstract

The invention discloses a method for preparing an outer wall furring brick by utilizing ardealite as a raw material. Industrial waste ardealite is utilized as a main raw material for manufacturing the outer wall furring brick. After the ardealite is dried, ground and screened and dehydrated at 350-450 DEG C, 2-6% of sintering agents are added, the ardealite is evenly mixed and undergoes compression molding, and pressed blank is sintered at 950-1100 DEG C and undergoes glaze firing at 950 DEG C to obtain a glaze ardealite ceramic product serving as the outer wall furring brick. According to the method, except the dehydration treatment on the ardealite, the remaining processes are the same as ordinary clay dry pressing ceramic preparation processes, the product performance can meet the outer wall brick use requirements, and the sintering temperature is also lower than that of ordinary dry pressing ceramics. The outer wall furring brick can be produced through an existing wall and floor tile process device, the energy consumption is low, the ardealite rate is as high as over 90%, and the method is a novel approach for effectively utilizing ardealite.

Description

technical field [0001] The invention belongs to the field of industrial waste utilization and building decoration materials, and in particular relates to a process method for making external wall ceramic veneer bricks with industrial waste phosphogypsum. Background technique [0002] Phosphogypsum is a by-product of phosphoric acid and various phosphates produced by the wet method of phosphate rock (the main component is dihydrate gypsum, and it also contains impurities such as phosphorus, fluorine, iron, aluminum and a small amount of heavy metals), and the emission is huge (per 1 About 5 tons of phosphogypsum are produced per ton of phosphogypsum), but the current utilization rate is very low, and no effective utilization method has been found so far. A large amount of unused phosphogypsum is still piled up like a mountain, which not only occupies land, increases the burden on enterprises, but also pollutes the environment. [0003] The current utilization ways of phosphog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/057C04B35/63
Inventor 李伯刚罗洪波
Owner SICHUAN UNIV