Desulfurized gypsum and iron tailings ceramsite and preparation method thereof

A technology for desulfurizing gypsum and iron tailings, which is applied to ceramic products, clay products, other household appliances, etc., to achieve the effects of improving bonding performance, low production cost and simple process

Inactive Publication Date: 2016-06-15
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a kind of ceramsite with desulfurized gypsum and iron tailings as main raw materials and its preparation method in view of the problems existing in the recycling of desulfurized gypsum and iron tailings produced in the existing industrial production process

Method used

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  • Desulfurized gypsum and iron tailings ceramsite and preparation method thereof
  • Desulfurized gypsum and iron tailings ceramsite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the raw materials for the preparation of the ceramsite include 13 parts of desulfurized gypsum, 59 parts of iron tailings, 24 parts of fly ash and 4 parts of coal powder by weight percentage. The characteristic steps of the preparation method of ceramsite using desulfurized gypsum and iron tailings as main raw materials are:

[0041] (1) Material pretreatment, desulfurization gypsum, iron tailings, fly ash and coal powder are respectively ground, dried, and passed through a 125-mesh sieve, and the raw materials for the ingredients are obtained from the part under the sieve;

[0042] (2) The ingredients are mixed evenly, each component is weighed according to the weight ratio, and the mixed material is obtained after mixing evenly;

[0043] (3) Pelletizing, adding the mixed material to the disc pelletizing machine to pelletize, the supplementary water in the pelletizing process is added in the form of mist water, and the raw pellets of 5~15mm ...

Embodiment 2

[0050] Such as figure 1 As shown, the raw materials for the preparation of the ceramsite include 15 parts of desulfurized gypsum, 60 parts of iron tailings, 21 parts of fly ash and 4 parts of coal powder by weight percentage. The steps of the preparation method of ceramsite using desulfurized gypsum and iron tailings as main raw materials are:

[0051] (1) Material pretreatment, desulfurization gypsum, iron tailings, fly ash and coal powder are respectively ground, dried, and passed through a 125-mesh sieve, and the raw materials for the ingredients are obtained from the part under the sieve;

[0052] (2) The ingredients are mixed evenly, each component is weighed according to the weight ratio, and the mixed material is obtained after mixing evenly;

[0053] (3) Pelletizing, adding the mixed material to the disc pelletizing machine to pelletize, the supplementary water in the pelletizing process is added in the form of mist water, and the raw pellets of 5~15mm are screened to...

Embodiment 3

[0060] Such as figure 1 As shown, the raw materials for the preparation of the ceramsite include 20 parts of desulfurized gypsum, 55 parts of iron tailings, 21 parts of fly ash and 4 parts of coal powder by weight percentage. The steps of the preparation method of ceramsite using desulfurized gypsum and iron tailings as main raw materials are:

[0061] (1) Material pretreatment, desulfurization gypsum, iron tailings, fly ash and coal powder are respectively ground, dried, and passed through a 125-mesh sieve, and the raw materials for the ingredients are obtained from the part under the sieve;

[0062] (2) The ingredients are mixed evenly, each component is weighed according to the weight ratio, and the mixed material is obtained after mixing evenly;

[0063] (3) Pelletizing, adding the mixed material to the disc pelletizing machine to pelletize, the supplementary water in the pelletizing process is added in the form of mist water, and the raw pellets of 5~15mm are screened to...

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Abstract

The invention relates to desulfurized gypsum and iron tailings ceramsite and a preparation method thereof. The preparation method comprises the following steps: pretreatment of raw materials, uniform mixing of burdens, pelletizing, drying, preheating, calcination, and cooling. The raw materials comprise 10-20 parts of desulfurized gypsum, 50-60 parts of iron tailings, 20-30 parts of fly ash, and 0-6 parts of coal dust; the main phases of the prepared ceramsite are diopside (CaMgSi2O6), aluminum calcium silicate (CaAl2Si2O8), anorthite (CaMgSi2O6) and pyroxene (Ca4Mg3FeSi8O24); and the diopside and anorthite crystals are in a plate shape or a plate cylindrical shape. According to the invention, burden proportion of the desulfurized gypsum is increased, resource utilization rate is increased; at the same time, the ceramsite intensity is increased, the ceramsite water absorption rate is reduced, the preparation method is simple, operation is convenient, and production cost is low.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of industrial waste resources, and in particular relates to ceramsite with desulfurized gypsum and iron tailings as main raw materials and a preparation method thereof. Background technique [0002] my country's iron ore resources are poor, fine, and miscellaneous, and 2.5-3.0 tons of tailings are discharged for every 1 ton of iron ore concentrate produced. The stockpiling of tailings not only occupies land, but also poses a potential hazard to the surrounding area of ​​the reservoir area, especially the downstream environment of the reservoir area. By the end of 2011, my country's iron tailings stockpile was as high as 12 billion tons, and it was growing at a rate of about 1.5 billion tons every year. Correspondingly, the current utilization rate of tailings in my country was less than 17% of the tailings produced in the year. Therefore, the development and utilization of tailin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/132C04B33/135
CPCC04B33/132C04B33/1328C04B33/1352C04B35/195C04B35/22C04B38/009C04B2201/50C04B2235/96C04B38/068Y02P40/60
Inventor 周文波张威操斌李艾强黄业豪
Owner WUHAN UNIV OF SCI & TECH
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