Preparation method of low-cost glass ceramic

A glass-ceramic, low-cost technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of affecting the structural stability of crystal glass, increasing the viscosity of glass liquid at high temperature, and difficult operation of water quenching process, etc. Achieve the effects of increasing economic added value, enhancing solubility performance, and improving nucleation performance

Active Publication Date: 2021-12-28
WUHAN UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

Commonly used additives are Na 2 O, BaO or SrO, etc., but Na 2 O has adverse effects on the crystallization, internal structure and performance of glass-ceramics. When BaO is added too much, it will make it difficult to clarify the glass liquid, and the amount of crystallization will increase, and the crystals will grow too much, which will affect the structural stability of crystal glass. The addition of SrO will increase the high-temperature viscosity of the molten glass, making the water quenching process difficult to operate
[0004] Copper slag is a by-product of the copper smelting process. The output is huge, but the metal resources are abundant and have a high recovery value. However, a large amount of secondary tailings will be generated in the recycling process; the main utilization methods of these secondary tailings It is mostly used for the production of cement or roadbed materials, and the added value of these utilization methods is low

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  • Preparation method of low-cost glass ceramic
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  • Preparation method of low-cost glass ceramic

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preparation example Construction

[0031] A method for preparing low-cost glass-ceramics, which uses high-temperature smelting reduction tailings and zinc-containing dust produced in the process of reducing and recovering iron after adding copper slag to high-temperature molten converter slag as low-cost glass-ceramic base materials. Low-cost glass-ceramic is produced after heat treatment process. The preparation process of low-cost glass-ceramics can be set near the high-temperature converter furnace, and the high-temperature molten converter slag after slag extraction can be directly added as raw materials to the copper slag reduction and recovery process. In this way, not only can the high-efficiency utilization of converter slag slag and high-temperature smelting reduction tailings waste heat be achieved, low-cost reuse of high-temperature slag heat can be achieved, but also copper slag and iron in converter slag can be recovered at the same time.

[0032] Among them, SiO in copper slag 2 The mass fraction...

Embodiment 1

[0041] see figure 1 As shown, the present embodiment provides a method for preparing low-cost glass-ceramic, comprising the following steps:

[0042] S1. According to the mass ratio of copper slag, industrial grade alumina and coke as 1:0.07:0.12, mix the samples evenly and grind them until the particle size is less than 0.074mm to obtain a mixture. Pour the mixture directly into the high-temperature molten converter slag and heat up to 1500°C and hold for 1 hour to obtain reduced iron, high-temperature melting reduction tailings and zinc-containing dust; the mass ratio of copper slag to high-temperature melting converter slag is 1:0.4;

[0043] S2. Spray the zinc-containing dust generated during the copper slag reduction and recovery process into the high-temperature slag under high pressure to obtain a basic glass melt; the mass fraction of the zinc-containing dust in the low-cost glass-ceramic base material is 6 wt %;

[0044] S3. Pouring the low-cost glass-ceramic melt ob...

Embodiment 2-3

[0052] Embodiment 2-3 provides a method for preparing a low-cost glass-ceramic. Compared with Example 1, the difference is that the mass fraction of zinc-containing dust added during the preparation of glass-ceramics in Example 2-3 is 2wt. %, 4wt%, and the rest are roughly the same as in Example 1, and will not be repeated here.

[0053] Performance tests were performed on the low-cost glass-ceramics prepared in Examples 2-3, and the test results are shown in the table below.

[0054] Table 2 Example 2-3 and the performance test results of glass-ceramics prepared by comparative examples

[0055]

[0056] It can be seen from Table 2 that the glass-ceramic colors in Examples 2 and 3 are dark yellow and beige respectively, and the glass-ceramic in the comparative example is brown, indicating that different additions of zinc-containing dust can change the color of the glass-ceramic. The microhardness of the glass-ceramics prepared after adding zinc-containing dust in Examples ...

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Abstract

The invention provides a preparation method of low-cost glass ceramic. Copper slag and high-temperature molten converter slag are mixed, molten reduction tailings generated after iron is reduced and recovered and zinc-containing dust serve as base materials of the low-cost glass ceramic, and a one-step heat treatment process is carried out to prepare the low-cost glass ceramic. The process can be arranged near a high-temperature converter, the solid copper slag and the reducing agent are poured into the liquid converter slag after deslagging and are heated to be completely molten, glass ceramic is prepared from generated secondary tailings, and iron in the glass ceramic is recycled. According to the method, waste of the recovery process can be completely utilized, the economic additional value of the waste is improved, solid waste is reduced, the effect of protecting the environment is achieved, and the purpose of efficiently utilizing the waste heat of the molten converter slag is achieved; and meanwhile, the technological process is simplified. The secondary tailings obtained after reduction of the copper slag and the molten converter slag are used as the base material of the glass ceramic, the preparation cost is low, the price advantage is great, the economic benefit is good, the performance of the prepared glass ceramic is superior to that of natural stone, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of glass-ceramics preparation, in particular to a method for preparing low-cost glass-ceramics. Background technique [0002] Glass-ceramic refers to the basic glass with a specific composition with or without a crystal nucleating agent. After heat treatment under a certain temperature system, a large number of tiny crystals are uniformly precipitated in the glass to form a dense microcrystalline phase and glass. multiphase complexes. By controlling the type, quantity and size of crystallites, transparent glass-ceramics, glass-ceramics with low expansion coefficient, surface-strengthened glass-ceramics, glass-ceramics of different colors or machinable glass-ceramics can be obtained. As an inorganic non-metallic material, glass-ceramic is a new type of building material, which has the dual characteristics of glass and ceramics. The arrangement of atoms inside ordinary glass is irregular, which is one of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C6/10C03C1/00C03C4/02C03B19/02C03B32/02C21B13/00
CPCC03C10/0063C03C1/002C03C4/02C03B19/02C03B32/02C21B13/0006Y02P10/20
Inventor 马国军李志郑顶立张翔徐菊李治桥海远浩
Owner WUHAN UNIV OF SCI & TECH
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