Artificial perlite and puffed products and preparation method of artificial perlite

A technology for artificial pearls and products, applied in ceramic products, other household appliances, household appliances, etc., can solve the problems of devitrification, large differences in natural perlite grades, and high production costs

Active Publication Date: 2015-01-28
宁波荣山新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] (1) Natural perlite is a natural silicate mineral, its glassy content and various physical and chemical properties are completely determined by the geological conditions and geological change process of the mineral formation area, and the grade of natural perlite produced in different mining areas varies greatly. Affected by the local environment, most natural perlite has serious devitrification and low expansion ratio, which cannot meet the production requirements of perlite;
[0018] (2) The puffing temperature of natural perlite is high, the energy consumption is large, and the production cost is high
[0019] (3) During the processing of natural perlite, the yield of ore sand that meets the production standards is relatively low
The use of natural perlite is limited to ore sand above 0.18mm, and the rest of the powder ore is discarded as tailings. Since natural perlite is processed by mechanical crushing, 30-40% of perlite ore powder is produced during the production process; The ...

Method used

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  • Artificial perlite and puffed products and preparation method of artificial perlite
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  • Artificial perlite and puffed products and preparation method of artificial perlite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] In the present embodiment, the calcium-based bentonite used has a chemical composition and content as shown in Table 1-1; the sodium silicate used has a modulus of m=2.8 and a solid content of 37%, and its parameters are shown in Table 1-2 shown. The experimental materials selected in the experiment are all qualified industrial-grade raw materials, and no optimization processing has been carried out before the experiment.

[0107] Table 1-1 Chemical composition and content of calcium-based bentonite

[0108] chemical composition

SiO 2

Al 2 o 3

Fe 2 o 3

FeO

TiO

CaO

MgO

MnO

K 2 o

Na 2 o

P 2 o 5

Content (wt%)

65.04

16.08

1.12

0.20

0.27

5.01

2.13

0.29

1.00

0.22

0.05

[0109] Table 1-2 Parameters of sodium water glass

[0110]

[0111] Compared with natural perlite, in the chemical composition of calcium-based bentonite, Al 2 o 3 Higher con...

Embodiment 2

[0129]The reason why natural perlite is widely used is that it can expand into a lightweight material with a honeycomb structure at high temperature, but the expansion temperature of natural perlite is relatively high, which is 1050-1350 °C; and the expansion multiple mainly depends on the natural perlite ore. grade. Artificial perlite not only has the same puffing characteristics as natural perlite, but also has a low puffing temperature. The preparation process does not require mechanical crushing, basically does not generate dust pollution, and the puffed products have excellent chemical stability. In the present embodiment, test the expansion ratio of artificial perlite in the following way:

[0130] 1. Use a 10ml graduated cylinder to take an appropriate amount of the sample to be tested, about 1ml, and record it as V 1 (Try to vibrate and compact until the volume no longer changes);

[0131] 2. Quickly pour the sample into the burning porcelain evaporating dish (the ac...

Embodiment 3

[0145] In this embodiment, the influence of the water glass modulus on the various properties of the artificial perlite and its puffed products described in the present invention will be explored. Choose 1# and 2# two kinds of sodium silicate with different modulus, and the parameters of the silicate are shown in Table 3-1:

[0146] 3-1 Two kinds of water glass parameters used in the experiment

[0147]

[0148]

[0149] With above-mentioned two kinds of water glass as raw material respectively, the artificial perlite that is raw material with 1# water glass is defined as 1#, and the artificial perlite that is raw material with 2# water glass is defined as 2#, according to Al 2 o 3 The content is from 14% to 4%, and the formulas of 1# and 2# artificial perlite are respectively defined as 3-1~3-11 and 3-12~3-22, and the above formulas are prepared by molding trapping method or mechanical shearing method artificial perlite. The experimental results show that the appeara...

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Abstract

The invention relates to artificial perlite and puffed products and a preparation method of artificial perlite. The artificial perlite is prepared by the following steps: by using calcium bentonite and an alkali metal silicate aqueous solution as raw materials, properly introducing an auxiliary function aid; and puffing at a certain temperature to obtain the artificial perlite puffed product. The preparation method is a moulding and mixture-ageing method and a mechanical shearing method. The artificial perlite is high in utilization ratio of raw materials and low in puffing temperature. The puffed products are numerous in variety, stable and controllable in physical and chemical properties, and good in mechanical strength and fireproof performance. The preparation method is simple in preparation process and basically free from dust pollution in the preparation process, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of perlite material and its preparation, in particular to an artificial perlite and puffed product and its preparation method. Background technique [0002] After the natural perlite magma is ejected from the surface, it is cooled by the atmosphere, and the magma condenses rapidly, and a large amount of water vapor fails to escape from the magma, forming a water-containing glassy lava; because of its pearly crack structure, it is named perlite. Perlite is mainly composed of volcanic glass, containing crystalline minerals such as quartz and plagioclase. Its XRD spectrum is as follows figure 1 shown. [0003] Natural perlite is a non-metallic mineral with pearly luster, mostly light gray, dark green, yellowish white or brown; including perlite, obsidian and pitch rock, the three have the same chemical composition, the main component is SiO 2 、Al 2 o 3 , CaO, R 2 O and a certain amount of combined crystal water, but...

Claims

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Application Information

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IPC IPC(8): C04B28/26C04B38/00C04B14/12
Inventor 王智宇刘琦屠浩驰王小山阮华李陆宝
Owner 宁波荣山新型材料有限公司
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