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Method for preparing cordierite ceramics by using serpentine tailings

A technology of serpentine tailings and cordierite, which is applied to the removal of solid waste, etc.

Inactive Publication Date: 2014-05-14
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the lack of existing technologies for comprehensive utilization of serpentine, which has led to the inability to realize industrialized production of serpentine resource mining so far

Method used

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  • Method for preparing cordierite ceramics by using serpentine tailings
  • Method for preparing cordierite ceramics by using serpentine tailings
  • Method for preparing cordierite ceramics by using serpentine tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: The dried serpentine tailings and kaolin tailings are then turned in a ball mill at 300r / min for 1 hour according to the ratio of serpentine tailings 35% kaolin tailings 60% alumina 5%. Then take out the powder, grind it with a ball mill and a mortar and pass it through 100 mesh. Take the sieved powder, add 10% PVA solution (5% concentration), mix again, and pass through a 30-mesh sieve. Put the above-mentioned mixed powder into a stainless steel mold, and apply a pressure of 10MPa to shape the material. Then put it into a high-temperature furnace, and the heating rate is controlled at 60 oC / h; at 800 oC Keep warm for 0.5h, then control the heating rate at 200 oC / h, raised to 1300°C for 2h. Cool naturally to obtain cordierite ceramics. The SEM and XRD figures of the sample obtained in this embodiment are shown in figure 1 with figure 2 .

Embodiment 2

[0042] Example 2: The dried serpentine tailings and kaolin tailings are then turned in a ball mill at 200r / min for 2 hours according to the ratio of serpentine tailings 30% kaolin tailings 60% alumina 10%. Then take out the powder, grind it with a ball mill and a mortar and pass it through 100 mesh. Take the sieved powder, add 8% PVA solution (5% concentration), mix evenly again, and pass through a 30-mesh sieve. Put the above-mentioned mixed powder into a stainless steel mold, and apply a pressure of 8MPa to shape the material. Then put it into a high-temperature furnace, and the heating rate is controlled at 100 oC / h; at 800 oC Keep warm for 1h, then control the heating rate at 200 oC / h, raised to 1200°C for 2h. Cool naturally to obtain cordierite ceramics. The SEM and XRD figures of the sample obtained in this embodiment are shown in image 3 with Figure 4 .

Embodiment 3

[0043] Example 3:The dried serpentine tailings and kaolin tailings are then turned in a ball mill at 300r / min for 1 hour according to the ratio of serpentine tailings 25% kaolin tailings 70% alumina 5%. Then take out the powder, grind it with a ball mill and a mortar and pass it through 100 mesh. Take the sieved powder, add 9% PVA solution (5% concentration), mix evenly again, and pass through a 30-mesh sieve. Put the above-mentioned mixed powder into a stainless steel mold, and apply a pressure of 10MPa to shape the material. Then put it into a high-temperature furnace, and the heating rate is controlled at 80 oC / h; at 800 oC Keep warm for 1h, then control the heating rate at 250 oC / h, raised to 1300°C for 2h. Cool naturally to obtain cordierite ceramics. The SEM and XRD figures of the sample obtained in this embodiment are shown in Figure 5 with Image 6 .

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Abstract

The invention relates to a process method for preparing cordierite ceramics by using serpentine tailings, and belongs to the technical field of building material and tailings resource recycling and environmental protection. The serpentine tailings and kaolin tailings are taken as main raw materials and are added with a small amount of technological alumina, and the mixture is subjected to ball milling, compression moulding, drying and sintering processes to form a cordierite ceramic material. By the method, the environment pollution problem caused by stacking of the tailings is solved, the raw material cost of the product can be reduced, the preparation process is simple and is easy to control, the sintering temperature is low, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to a process method for preparing cordierite ceramics by using serpentine tailings and kaolin tailings, and belongs to the technical field of environmental protection for regeneration and utilization of building materials and tailings resources. Background technique [0002] The molecular composition of the serpentine mineral is Mg 6 [Si 4 o 10 ](OH) 8 , of which MgO accounts for 43%, SiO 2 Accounting for 44.1%, H 2 O accounted for 12.9%. Serpentine ore in nature often contains Fe, Mn, Ni, F, Cu, Cr and other elements. Except for F replacing OH, these elements are mainly mixed in the same type and isomorphism. The serpentine mineral belongs to the monoclinic crystal system, the crystal lattice is a layered structure, the layer is an ionic bond, and the layer is a molecular bond, and the output form is often aphanitic dense massive ring complex. It has snakeskin-like black-green, gray-green, and yellow-green markings. Ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/195C04B35/622B09B3/00
Inventor 朱萍洪岱王良有周鸣
Owner SHANGHAI UNIV
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