Method for preparing jade type microcrystalline glass with high-temperature furnace slag

A technology of glass-ceramic and slag, which is applied in the field of preparation of glass-ceramic, can solve the problems of thermal energy waste, low product added value, slag does not meet the industrial policy and requirements of industrial waste in large quantities, high added value and comprehensive utilization, etc. Achieve the effect of reducing production cost, avoiding heat loss and low product cost

Inactive Publication Date: 2010-04-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the discharge of these high-temperature slags is carried out by water quenching process, that is, the molten high-temperature slag is water-quenched into slag pellets. This treatment method has two disadvantages: (1) a large amount of slag contained in the molten high-temperature slag Heat energy is wasted; (2) A large amount of corrosive hot steam is generated during water quenching, causing air and water pollution
There is also a small amount of slag as the preparation of CaO-Al 2 o 3 -SiO 2 The raw material of glass-ceramic system, but CaO-Al 2 o 3 -SiO 2 The CaO content in the glass-ceramic system is about 15%, while the CaO content in the slag is as high as 40%. If CaO-Al 2 o 3 -SiO 2 For glass-ceramics, not only the utilization rate of slag in glass-ceramics is low, generally only 30-40%, but also the main crystal phase of glass-ceramics in this system is wollastonite, and the permeability of glass-ceramics is poor. Without the beautiful and elegant jade texture, the added value of the product is low
To sum up, the current utilization of slag does not meet the industrial policies and requirements of comprehensive utilization of industrial waste with large quantities and high added value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation process of the present embodiment comprises the following steps:

[0021] (1) Weighing the additives accounting for 27.0wt% of the total weight, accounting for the flux clarifying agent of 8.0wt% of the total weight, wherein the additives are Na 2 CO 3 , ZnO, NaNO 3 , CaF 2 and SiO 2 The composition of the mixture, its weight ratio is 8:2:1:1:3, flux clarifying agent is CeO 2 、Na 2 O, NH 4 NO 3 、Al 2 o 3 and Na 2 SO 4 The mixture formed, its weight ratio is 1: 7: 4: 3: 3, the additive and the flux clarifying agent are mixed and pulverized, and then passed through a 40-mesh sieve to obtain the auxiliary material to be prepared;

[0022] (2) Add auxiliary materials and molten slag accounting for 65.0wt% of the total weight into a glass melting furnace, melt at 1520°C for 3.0h to make molten glass, and then keep it at 1400°C for 1.0h to homogenize and clarify the molten glass to obtain a suitable Amorphous melts for direct molding;

[0023] (3)...

Embodiment 2

[0027] The preparation process of the present embodiment comprises the following steps:

[0028] (1) Weigh the additive that accounts for 20.0wt% of total weight, account for the flux clarifier of 5.0wt% of total weight, wherein additive is Na 2 CO 3 , ZnO, MgO, NaNO 3 , CaF 2 and SiO 2 The composition of the mixture, its weight ratio is 7:2:1:1:2:6, flux clarifying agent is CeO 2 、Na 2 O, NH 4 NO 3 、Al 2 o 3 and Na 2 SO 4 The mixture formed, the weight ratio of which is 1:6:5:4:7, is mixed with the additive and the flux clarifier, then pulverized, and then passed through a 40-mesh sieve to obtain the auxiliary material to be prepared;

[0029] (2) Add auxiliary materials and molten slag accounting for 75.0wt% of the total weight into a glass melting furnace, melt at 1550°C for 3.0h to make a glass melt, then keep it at 1400°C for 1.0h, homogenize and clarify the glass melt, and obtain a suitable Amorphous melts for direct molding;

[0030] (3) The amorphous melt ...

Embodiment 3

[0034] The preparation process of the present embodiment comprises the following steps:

[0035] (1) Weigh the additive that accounts for 24.0wt% of total weight, and account for the flux clarifier of 6.0wt% of total weight, wherein additive is Na 2 CO 3 , ZnO mixture, its weight ratio is 7:1, flux clarifying agent is CeO 2 , NH4 NO 3 and Na 2 SO 4 The mixture formed, the weight ratio of which is 1:6:13, is mixed with the additive and the flux clarifier, pulverized, and then passed through a 40-mesh sieve to obtain the auxiliary material to be prepared;

[0036] (2) Add auxiliary materials and molten slag accounting for 70.0wt% of the total weight into a glass melting furnace, melt at 1530°C for 3.0h to make molten glass, and then keep it warm at 1400°C for 1.0h to homogenize and clarify the molten glass. Obtain an amorphous melt suitable for direct molding;

[0037] (3) The amorphous melt is rolled or poured into a mold to form a glass plate or block;

[0038] (4) The ...

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Abstract

The invention discloses a method for preparing jade type microcrystalline glass with high-temperature furnace slag, which comprises the steps of: taking molten furnace slag as main materials; adding auxiliary materials such as fluxing clarifying agent and additive, and the like; further melting and clarifying in a high-temperature furnace to form glass liquid; pouring or calendaring the glass liquid to form basic glass; heat processing the basic glass by means of crystallization to obtain the rough product of the jade type microcrystalline glass; and finish machining to obtain the finished product of the jade type microcrystalline glass. The method not only effectively utilizes the molten high-temperature furnace slag, but also sufficiently utilizes heat energy stored in the high-temperature furnace slag, and prevents the high-temperature furnace slag from generating huge amounts of corrosive hot steam in the process of discharging. The jade type microcrystalline glass prepared by the method is in the status of semitransparent wax, exactly looks like natural jade, has good cutting performance, high intensity and good tenacity, can be used for replacing natural stones in construction industry, and can be used for replacing natural rare jades in machining artware.

Description

technical field [0001] The invention relates to a preparation method of glass-ceramics, in particular to a method for preparing jade-type glass-ceramics by utilizing high-temperature slag. Background technique [0002] A large amount of waste slag is produced in the process of blast furnace ironmaking and yellow phosphorus production. Usually, the discharge of these high-temperature slags is carried out by water quenching process, that is, the molten high-temperature slag is water-quenched into slag pellets. This treatment method has two disadvantages: (1) a large amount of slag contained in the molten high-temperature slag Heat energy is wasted; (2) A large amount of corrosive hot steam is produced in the water quenching process, causing air and water pollution. [0003] At present, the vast majority of slag is used as raw materials for the manufacture of cement, bricks and tiles, etc., and made into low value-added products. There is also a small amount of slag as the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C6/10
Inventor 梁开明曹建尉李要辉梁力
Owner TSINGHUA UNIV
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