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Sintering-free phosphor gypsum ceramsite and preparation method thereof

A technology of phosphogypsum and ceramsite, which is applied in the field of building materials, can solve problems such as not being able to be used as building materials, insufficient strength, and polluting the environment, and achieve the effects of increasing cement utilization, improving cohesiveness, and improving the environment

Inactive Publication Date: 2017-09-26
福建中凯环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Phosphogypsum is a kind of solid waste, which seriously pollutes the environment. The existing ceramsite containing phosphogypsum is mainly used in plant nutrient soil. Due to insufficient strength, it cannot be used as a building material.
There is currently no ceramsite containing phosphogypsum that can be used as a building material

Method used

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  • Sintering-free phosphor gypsum ceramsite and preparation method thereof
  • Sintering-free phosphor gypsum ceramsite and preparation method thereof
  • Sintering-free phosphor gypsum ceramsite and preparation method thereof

Examples

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Embodiment 1

[0034] A non-fired phosphogypsum ceramsite, comprising raw materials and proportions by weight are:

[0035]

[0036]

Embodiment 2

[0038] A non-fired phosphogypsum ceramsite, comprising raw materials and proportions by weight are:

[0039]

Embodiment 3

[0041] A non-fired phosphogypsum ceramsite, comprising raw materials and proportions by weight are:

[0042]

[0043] Specifically, the cement is Portland cement, preferably, the grade of Portland cement is 42.5R; the phosphogypsum hemihydrate is double-calcined from phosphogypsum, and is a cementitious material.

[0044] A kind of preparation method of non-fired phosphogypsum ceramsite, described method is:

[0045] S1 Add any one of the above-mentioned non-fired phosphogypsum ceramsite into the forced mixer and stir evenly;

[0046] After the S2 raw materials are evenly stirred, add water into the forced mixer and continue stirring for 8 to 10 minutes to obtain a mixture;

[0047] S3 sends the mixture obtained after being stirred by the forced mixer to the digestion chamber for catalytic treatment, and the time is 1 to 2 hours;

[0048] S4 sends the mixture processed in the digestion chamber to a double-roller granulator for granulation to obtain ceramsite;

[0049] S5...

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Abstract

The invention provides a sintering-free phosphor gypsum ceramsite and a preparation method thereof. The sintering-free phosphor gypsum ceramsite is prepared from the following raw materials in parts by weight: 450 to 650 parts of phosphor gypsum, 30 to 60 parts of semi-hydrated phosphor gypsum, 100 to 200 parts of cement, 2 to 5 parts of expanded perlite powder or vitrified micro-balls, 50 to 160 parts of catalyst, 10 to 30 parts of glue powder, 50 to 100 parts of activator, and 15 to 170 parts of water. The preparation method comprises the following steps of adding the raw materials into a forced type stirrer to stir, adding into a digestion chamber to catalyze, and finally sending into a double-roller granulating machine to granulate. The sintering-free phosphor gypsum ceramsite has the advantages that by using the solid waste of the phosphor gypsum, the low-density and high-strength ceramsite is obtained without sintering, and is used as a coarse aggregate of buildings; the energy-saving effect is realized in raw materials and processing.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an unfired phosphogypsum ceramsite and a preparation method thereof. Background technique [0002] Coarse aggregate refers to the aggregate or aggregate in which sand and stone act as a skeleton in concrete, and the particle size is greater than 5mm. There are two kinds of coarse aggregates commonly used in existing concrete: free time and pebbles. Crushed stone is made of natural rock, pebble or mine waste rock by mechanical crushing and screening. Pebbles are formed by natural weathering, water handling, sorting and accumulation. The national standard requires that the cylinder compressive strength of coarse aggregate be greater than or equal to 3.5 NPa. [0003] Phosphogypsum is a solid waste that seriously pollutes the environment. The existing ceramsite containing phosphogypsum is mainly used in plant nutrient soil, but cannot be used as a building material due...

Claims

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Application Information

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IPC IPC(8): C04B18/02C04B18/04
CPCY02W30/91C04B18/027C04B18/021C04B7/02C04B18/0445C04B14/185C04B22/12C04B2103/0057C04B22/10C04B22/00
Inventor 邓根保刘春兰
Owner 福建中凯环保科技有限公司
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