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Steel slag high-strength microcrystalline glass and preparation method thereof

A technology of glass-ceramics and steel slag, which is applied in glass manufacturing equipment, glass furnace equipment, glass molding, etc., can solve the problems of low strength of glass-ceramics, achieve good flexural strength, reduce production costs, and avoid pollution.

Active Publication Date: 2020-12-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the present invention provides a high-strength glass-ceramic with steel slag and its preparation method to solve the technical problem of low strength of glass-ceramics prepared with steel slag

Method used

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preparation example Construction

[0031] The present invention also provides a method for preparing steel slag high-strength glass-ceramic, comprising the following steps:

[0032] Step 1. Mix the raw materials evenly according to the designed ratio to obtain the mixture.

[0033] Step 2. Send the mixture into the high-temperature furnace, and continuously feed weakly oxidizing gas from the bottom of the high-temperature furnace into the high-temperature furnace at a rate of 0.6-1.2m / min, forming a weakly oxidizing atmosphere in the high-temperature furnace; wherein, the weakly oxidizing gas Using CO 2 and N 2 The mixed gas, the CO in the mixed gas2 The volume fraction is 35%-75%; heat up to 1450-1500°C and hold for 80-100min for melting and clarification to obtain molten and clarified glass; then pour the molten and clarified glass into preheated to 550-600°C In the mould, cast and form, and keep warm for 100-120min, after annealing, cool to room temperature with the furnace to obtain the basic glass;

[0...

Embodiment 1

[0037] Provided in this embodiment 1 is a steel slag high-strength glass-ceramic and a preparation method thereof, comprising the following steps:

[0038] Step 1. Weigh 40% of electric furnace slag, SiO 2 35%, Al 2 o 3 15.5%, MgO 7%, flux 0.5%, and stabilizer 1.0% are mixed evenly to obtain a mixture; wherein, the flux is one or both of borax and borax, and the stabilizer is tin chloride and tin nitrate one or both of them.

[0039] Step 2. Send the mixture into the high-temperature furnace, and continuously feed weak oxidizing gas into the high-temperature furnace from the bottom of the high-temperature furnace at a rate of 0.6m / min to form a weakly oxidizing atmosphere in the high-temperature furnace; wherein, the CO in the mixed gas 2 The volume fraction is 35%; then heat up to 1450-1500°C and keep it warm for 80-1000min to melt and clarify to obtain molten and clarified qualified glass; then pour the melted and clarified qualified glass into a preheated glass Castin...

Embodiment 2

[0043] Provided in this embodiment 2 is a steel slag high-strength glass-ceramic and a preparation method thereof, comprising the following steps:

[0044] Step 1. Weigh 55% of electric furnace slag, SiO 2 30%, Al 2 o 3 9.4%, MgO 4%, flux 1%, and stabilizer 0.6% are mixed evenly to obtain a mixture; wherein, the flux is one or both of borax and borax, and the stabilizer is tin chloride and nitric acid One or both in tin.

[0045] Step 2. Send the mixture into the high-temperature furnace, and continuously feed weak oxidizing gas into the high-temperature furnace from the bottom of the high-temperature furnace at a rate of 0.9m / min to form a weakly oxidizing atmosphere in the high-temperature furnace; wherein, the CO in the mixed gas 2 The volume fraction is 55%; then heat up to 1450-1500°C and keep it warm for 80-1000min to melt and clarify to obtain molten and clarified qualified molten glass; then pour the molten and clarified qualified molten glass into a Casting in t...

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Abstract

The invention discloses steel slag high-strength microcrystalline glass and a preparation method thereof, and the steel slag high-strength microcrystalline glass is prepared from the following raw materials in percentage by mass: 40%-70% of steel slag, 24.3%-35% of silicon dioxide, 4%-15.5% of aluminum oxide, 1%-7% of magnesium oxide, 0.5%-1.5% of fluxing agent and 0.2%-1.0% of stabilizer, whereinthe fluxing agent is one or two of borax and boron mud, and the stabilizer is one or two of tin chloride and tin nitrate; the steel slag is used as a main raw material, the silicon dioxide, the aluminum oxide and the magnesium oxide are used as auxiliary materials, melting and clarification are performed under a weak oxidizing atmosphere condition, and the fluxing agent and the stabilizer are added, so that the controllability of a main crystalline phase in the steel slag high-strength microcrystalline glass is ensured, and the high strength and low water absorption performance of the steel slag high-strength microcrystalline glass are effectively improved; the high-value utilization of the steel slag is realized, the pollution of the steel slag to the environment is avoided, the production cost of the microcrystalline glass is effectively reduced, and the additional value of the product is improved; and in the preparation process, melting clarification is conducted under the weak oxidizing atmosphere condition, and the oxygen potential in a high-temperature furnace is effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of glass-ceramic materials, in particular to a steel slag high-strength glass-ceramic and a preparation method thereof. Background technique [0002] As a new type of inorganic non-metallic material, glass-ceramics has the characteristics of cheap and easy-to-obtain raw materials, simple preparation process and excellent performance. It is a material with high performance, low cost and broad application market. Using industrial waste residue as the main raw material to prepare glass-ceramics is of great significance to the comprehensive utilization of solid waste. It can not only greatly reduce the production cost of products, but also effectively protect the ecological environment. [0003] Steel slag is solid waste discharged during the steelmaking process. With the increase of steel production, the discharge of steel slag is also increasing. Today, 70% of steel slag is still in landfill and stockpiling, ...

Claims

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Application Information

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IPC IPC(8): C03C10/06C03C6/10C03C6/04C03C6/06C03B5/235C03B19/02C03B32/02
CPCC03C10/0063C03C10/0036C03C1/00C03C1/002C03B5/235C03B19/02C03B32/02
Inventor 李小明臧旭媛郑建潞张馨艺庞焯刚邢相栋贺芸席浩栋
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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