Silicon-slag microcrystalline glass and preparation method thereof

A technology of glass-ceramics and silicon slag, which is applied in the field of glass-ceramics and its preparation, can solve the problems of land occupation and environmental pollution, and achieve the goals of reducing pollution, reducing production costs, excellent physical and mechanical properties and chemical stability Effect

Inactive Publication Date: 2014-01-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, only a small amount of silicon smelting waste is used to make low-value-added products such as insulation boards and silicate felts, and some are even stored naturally, occupying land and polluting the environment

Method used

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  • Silicon-slag microcrystalline glass and preparation method thereof
  • Silicon-slag microcrystalline glass and preparation method thereof
  • Silicon-slag microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The silicon smelting waste residue and various mineral auxiliary materials are crushed, and then passed through a 20-mesh sieve, and 72.0-76.0 kg silicon smelting waste residue, 13.0-15.0 kg limestone or calcite (CaCO 3 ), 9.0-11.0 kilograms of fluorite (CaF 2 ), 2.0-4.0 kg of zinc oxide (ZnO), 1.0-3.0 kg of aluminum oxide (Al 2 O 3 ), 0.5-2.0 kg of ammonium nitrate (NH 4 NO 3 ). The silicon smelting waste residue, auxiliary raw materials and flux clarifier are fully mixed, and 4.0% of the total weight of the raw materials is added during the mixing process, and stirred for 10 minutes to mix evenly to form a basic glass batch.

[0039] The basic glass batch is sent to the melting furnace via a conveyor belt or a unit tank, and the melting temperature is controlled at 1470-1500 ℃ and melted for 2.0-6.0h, homogenized and clarified to make a qualified glass liquid; the clarified glass liquid flows through the liquid The hole enters the working part of the melting furnace, the ...

Embodiment 2

[0044] Crush various mineral auxiliary materials, then pass through a 20-mesh sieve, and accurately weigh 14.0-15.5 kg of limestone or calcite (CaCO 3 ), 10.0-11.0 kg fluorite (CaF 2 ), 10.0-13.0 kg potassium carbonate (K 2 CO 3 ), 2.5-3.5 kg of zinc oxide (ZnO), 1.0-2.0 kg of aluminum oxide (Al 2 O 3 ), 0.5-2.0 kg of ammonium nitrate (NH 4 NO 3 ), 1.0-3.0 kg of ammonium nitrate (NH 4 NO 3 ). Mix the above-mentioned auxiliary raw materials and the flux clarifier thoroughly, add the auxiliary raw materials and the water of 3.0-4.0% of the total weight of the flux clarifier, stir for 10-15 minutes and mix uniformly to form a premix.

[0045] The premix is ​​added to 39.0-41.0 kg of high-temperature molten silicon slag, the melting temperature is controlled at 1460-1480℃, and the melting is 2.0-4.0h, homogenized and clarified to make a qualified glass liquid; the clarified glass liquid flows through the liquid The hole enters the working part of the melting furnace, and the temperatu...

Embodiment 3

[0050] Crush various mineral auxiliary materials, then pass through a 20-mesh sieve, and accurately weigh 11.0-13.0 kg of quartz sand (SiO 2 ), 14.0-16.0 kg of limestone or calcite (CaCO 3 ), 10.0-11.0 kg fluorite (CaF 2 ), 3.0-5.0 kg potassium carbonate (K 2 CO 3 ), 1.5-3.0 kg of zinc oxide (ZnO), 1.3-2.5 kg of aluminum oxide (Al 2 O 3 ), 0.5-0.8 kg of ammonium nitrate (NH 4 NO 3 ), 0.5-1.3 kg sodium nitrate (NaNO 3 ). Mix the above-mentioned auxiliary raw materials and the flux clarifier thoroughly, add 5.0-6.0% water of the total weight of the auxiliary raw materials and the flux clarifier, stir for 10-15 minutes and mix uniformly to form a premix.

[0051] The premix is ​​added to 60-62 kg of high-temperature molten silicon slag, the melting temperature is controlled at 1470-1530℃, and the melting is 2.0-6.0h, homogenized and clarified to make qualified glass liquid; the clarified glass liquid flows through the liquid The hole enters the working part of the furnace, and the te...

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Abstract

The invention relates to silicon-slag microcrystalline glass and a preparation method thereof. Silicon smelting waste slag is taken as a major raw material, and silicon dioxide or silica sand (SiO2), fluorite (CaF2), limestone or calcite (CaCO3), industrial sodium carbonate (Na2CO3), zinc oxide (ZnO) and potassium carbonate (K2CO3) are taken as auxiliary raw materials, wherein the dosage of the silicon smelting waste slag in the raw materials of the microcrystalline glass is 26.0-75.0wt%. The preparation method specifically comprises the following steps of: evenly mixing cold-state silicon slag with other auxiliary raw materials in a blender mixer to obtain a basic mixed batch, melting the basic mixed batch into qualified glass liquid in a melting furnace, and then performing calendering, casting or water quenching on the glass liquid to form a basic glass plate or granules; finally, subjecting the basic glass plate to crystallization heat treatment to obtain the microcrystalline glass. The density of the microcrystalline glass is 2.5-2.8 g/cm<3>, the rupture strength of the microcrystalline glass is 30.0-103.5 MPa, the compressive strength of the microcrystalline glass is 70.0-903.0 MPa, the Moh's hardness of the microcrystalline glass is 5-8 and the abrasive resistance of the microcrystalline glass is 0.063-0.15 g/cm<2>; the silicon-slag microcrystalline glass can be widely applied to the fields such as chemical engineering, metallurgy, architectural ornament, petroleum, mine and machinery.

Description

Technical field [0001] The invention relates to a glass-ceramic and a preparation method thereof, in particular to a glass-ceramic prepared from silicon slag produced in the process of industrial silicon smelting and refining, and a preparation method thereof. The purpose is to comprehensively utilize industrial solid waste slag and provide a With good physical and mechanical properties, strong chemical stability, and excellent processing performance, it can replace high-strength wear-resistant engineering glass-ceramics such as natural stone, ceramic tiles and other decorative materials or some engineering materials. Background technique [0002] In the process of metallurgical production of polysilicon, slagging oxidation refining has many advantages such as simple process, low cost, and low pollution. The slagging oxidation refining process is to add refining slag with a higher melting point than metallurgical grade silicon to metallurgical grade silicon, and perform oxidation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C10/16
Inventor 曹建尉王志赵庆朝
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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