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Phosphogypsum fly coal ash ceramsite and preparation method thereof

A technology of fly ash ceramsite and phosphogypsum, applied in ceramic products, clay products, other household appliances, etc., can solve the problems of high cost, high energy consumption, low utilization rate of phosphogypsum and fly ash, etc. Improved, strength-enhancing effects

Inactive Publication Date: 2018-02-13
GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, there are relatively many research technologies for preparing ceramsite by using phosphogypsum and fly ash as raw materials, but most of them add phosphogypsum and fly ash to the main raw materials in the form of additives, and then The preparation of ceramsite makes the utilization rate of phosphogypsum and fly ash lower; even if there is a technical plan to use phosphogypsum to prepare ceramsite and obtain other products, the purpose is not to directly use phosphogypsum as a raw material to prepare ceramics. granules, which in turn results in higher costs and greater energy consumption for preparing ceramsite from phosphogypsum

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  • Phosphogypsum fly coal ash ceramsite and preparation method thereof

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Embodiment 1

[0023] Phosphogypsum fly ash ceramsite, raw material composition by weight is 50kg of phosphogypsum, 5kg of clay, 8kg of fly ash, wherein the clay is a powder mixed with urea phosphate at a mass ratio of 1:0.1.

[0024] The preparation method of phosphogypsum fly ash ceramsite comprises the following steps:

[0025] (1) Dry the phosphogypsum to constant weight, add fly ash and grind to 40 mesh, add clay powder, stir evenly, adjust the moisture content to 20%, and obtain a mixed powder;

[0026] (2) Put the mixed powder in a granulator to granulate, and make the diameter of the particles 2mm, then place it at 40°C, preheat for 30 minutes, and then heat up to 1200°C for 180 minutes in 10 minutes. Cool naturally to get ceramsite.

Embodiment 2

[0028] Phosphogypsum fly ash ceramsite, raw material composition by weight is phosphogypsum 80kg, clay 10kg, fly ash 12kg, among which clay is powder mixed with urea phosphate at a mass ratio of 1:0.4. Described fly ash, component content is calculated as SiO in mass percent 2 40%, Al 2 o 3 20%, FeO2%, Fe 2 o 3 15%, CaO7%, MgO8%, TiO 2 8%.

[0029] The preparation method of phosphogypsum fly ash ceramsite comprises the following steps:

[0030] (1) Dry the phosphogypsum to constant weight, add fly ash and grind it to 100 mesh, add clay powder, stir evenly, adjust the moisture content to 25%, and obtain a mixed powder;

[0031] (2) Put the mixed powder in a granulator to granulate, and make the diameter of the particles 8mm, and then place it at 100°C, preheat for 30 minutes, and then heat up to 1200°C for 180 minutes in 10 minutes. Cool naturally to get ceramsite.

Embodiment 3

[0033] Phosphogypsum fly ash ceramsite, the raw material composition is 60kg of phosphogypsum by weight, 8kg of clay, and 10kg of fly ash, wherein the clay is a powder mixed with urea phosphate at a mass ratio of 1:0.3. During the grinding process, water accounting for 14% of the clay mass was added, and after the grinding was completed, it was placed at a temperature of 70°C for 15 minutes, passed through an 80-mesh sieve, and dried to a constant weight. Described fly ash, component content is calculated as SiO in mass percent 2 50%, Al 2 o 3 15%, FeO1%, Fe 2 o 3 12%, CaO6%, MgO8%, TiO 2 8%.

[0034] The preparation method of phosphogypsum fly ash ceramsite comprises the following steps:

[0035] (1) Dry the phosphogypsum to constant weight, add fly ash and grind it to 200 mesh, add clay powder, stir evenly, adjust the moisture content to 30%, and obtain a mixed powder;

[0036] (2) Put the mixed powder in a granulator to granulate, and make the diameter of the particl...

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Abstract

The invention relates to the technical field of phosphogypsum ceramsite and particularly relates to phosphogypsum fly coal ash ceramsite and a preparation method thereof. According to the preparationmethod, large amount of phosphogypsum is utilized as a raw material, then clay and fly coal ash are added, and the clay is mixed with urea phosphate to be ground into powder; thus, the density and thestrength of the prepared ceramsite are effectively improved, ceramsite quality is improved, the application range of the phosphogypsum is expanded, and the utilization rate of the phosphogypsum is improved.

Description

technical field [0001] The invention relates to the technical field of phosphogypsum ceramsite, in particular to phosphogypsum fly ash ceramsite and a preparation method thereof. Background technique [0002] Phosphogypsum is the main solid waste in my country's phosphate fertilizer industry, and its main components are dihydrate gypsum and hemihydrate gypsum. According to incomplete statistics, the total annual discharge of phosphogypsum in my country exceeds 55 million tons on a dry basis, and the cumulative stockpiles are 250 million tons. With the development of high-concentration phosphate fertilizers in China, the discharge of phosphogypsum will increase, which not only causes serious environmental pollution, but also becomes a major problem facing the sustainable development of the phosphorus chemical industry. Therefore, it is urgent to effectively deal with phosphogypsum. [0003] Fly ash is the fine ash collected from the flue gas after coal combustion. Fly ash i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B33/04C04B38/00
CPCC04B33/04C04B33/132C04B33/1352C04B38/009C04B2235/77C04B2235/96C04B38/0067Y02P40/60
Inventor 杨永彬杨步雷邹国军向前勇李泽钢宋维相项军罗进峰焦树友
Owner GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION