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A method for preparing glass-ceramic by using calcium carbide slag

A technology of glass-ceramic and calcium carbide slag, which is applied in the field of glass-ceramic preparation, can solve problems such as complex process, low added value of products, and small amount of slag that is not fully utilized, so as to achieve the goal of improving economic value and simple process Effect

Active Publication Date: 2019-11-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At present, in the disclosed resource utilization methods of carbide slag, the added value of the product obtained is low; and in the invention patent CN102795772A disclosed a method for preparing glass-ceramic by using kaolin-type coal gangue or fly ash and carbide slag The utilization rate of slag is only 8-24%, and the amount of slag eaten is small and has not been fully utilized; when extracting chemicals such as nano-calcium carbonate through calcium carbide slag, it is necessary to treat a small amount of SiO 2 、Al 2 o 3 , Fe 2 o 3 and other components to remove impurities, making the process more complicated

Method used

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  • A method for preparing glass-ceramic by using calcium carbide slag

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Heat carbide slag in a high-temperature muffle furnace at a rate of 5 °C / min to 800 °C, then at a rate of 3 °C / min to 1000 °C and hold for 90 min, then cool to room temperature with the furnace to obtain rich CaO-containing raw materials, wherein the CaO content is 90.02wt%;

[0024] (2) The CaO-rich raw material obtained in step (1) and the SiO-rich 2 excipients, rich in Al 2 o 3 Excipients and Na-rich 2 CO 3 The auxiliary materials are mixed in the mixer for 90min, the raw materials rich in CaO account for 40wt% of the total raw materials, and the rich SiO 2 The auxiliary materials account for 54.22wt% of the total raw materials (quartz sand, of which SiO 2 content is 75wt%), rich in Al 2 o 3 The auxiliary materials account for 2.53wt% of the total amount of raw materials (bauxite, where Al 2 o 3 content is 80wt%), rich in Na 2 CO 3 The auxiliary materials account for 3.25wt% of the total amount of raw materials (soda, of which Na 2 CO 3 The content i...

Embodiment 2

[0028] (1) Heat carbide slag in a high-temperature muffle furnace at a rate of 7 °C / min to 700 °C, then at a rate of 2 °C / min to 1050 °C and keep it for 120 min, then cool to room temperature with the furnace to obtain rich CaO-containing raw materials, wherein the CaO content is 88.03wt%;

[0029] (2) The CaO-rich raw material obtained in step (1) and the SiO-rich 2 excipients, rich in Al 2 o 3 Excipients and Na-rich 2 CO 3 After the auxiliary materials are mixed in a mixer for 100 minutes, they are placed in an alumina crucible and melted in a high-temperature muffle furnace. CaO-rich raw materials accounted for 48wt% of the total raw materials, rich in SiO 2 The auxiliary materials account for 44.07wt% of the total raw materials (quartz sand, of which SiO 2 content is 80wt%), rich in Al 2 o 3 The auxiliary materials account for 3.72wt% of the total amount of raw materials (bauxite, where Al 2 o 3 content is 85wt%), rich in Na 2 CO 3 The auxiliary materials accou...

Embodiment 3

[0032] (1) Heat carbide slag in a high-temperature muffle furnace at a rate of 6 °C / min to 750 °C, then at a rate of 1 °C / min to 1100 °C and keep it for 100 min, then cool to room temperature with the furnace to obtain rich CaO-containing raw materials, wherein the CaO content is 88.67wt%;

[0033] (2) The CaO-rich raw material obtained in step (1) and the SiO-rich 2 excipients, rich in Al 2 o 3 Excipients and Na-rich 2 CO 3 After the auxiliary materials were mixed in a mixer for 110 minutes, they were placed in an alumina crucible and melted in a high-temperature muffle furnace. CaO-rich raw materials accounted for 53wt% of the total raw materials, rich in SiO 2 The auxiliary materials account for 40.21wt% of the total raw materials (quartz sand, of which SiO 2 content is 95wt%), rich in Al 2 o 3 The auxiliary materials account for 2.13wt% of the total amount of raw materials (bauxite, where Al 2 o 3 content is 90wt%), rich in Na 2 CO 3 The auxiliary materials acc...

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Abstract

The invention discloses a method for preparing glass-ceramic by using carbide slag, and belongs to the field of resource utilization of carbide slag. The method comprises: pre-treating carbide slag at a high temperature, mixing with an auxiliary material, melting at a high temperature, and carrying out base glass annealing, microcrystalline treatment and other processes to prepare the high added value glass-ceramic. According to the present invention, the prepared glass-ceramic has characteristics of high utilization value, simple process and the like, the raw material is the solid waste produced in the industrial production process, the produced glass-ceramic can be widely used in the building materials and other industries, and the harmless and resource utilization of the carbide slag is achieved.

Description

technical field [0001] The invention relates to a method for preparing glass-ceramic by using calcium carbide slag, which belongs to the technical field of industrial solid waste disposal, that is, the field of waste slag resource utilization. Background technique [0002] Carbide slag is a hydrolysis by-product produced during the hydrolysis of calcium carbide to produce acetylene. The main reaction formula is shown in the following formula; [0003] CaC 2 +2H 2 O→C 2 h 2 +Ca(OH) 2 [0004] The main components are calcium hydroxide and calcium carbonate, and the formation of component calcium carbonate is caused by the absorption of carbon dioxide in the air by calcium hydroxide. In addition, there is a small amount of SiO 2 、Al 2 o 3 , Fe 2 o 3 Such components belong to high calcium alkali slag. At present, there are mainly two ways to deal with calcium carbide slag at home and abroad: stockpiling and comprehensive utilization. The stockpiling of a large amount...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C3/062
CPCC03C3/062C03C10/0063
Inventor 黄小凤刘红盼马丽萍宁平陈丹莉尚志标李国标
Owner KUNMING UNIV OF SCI & TECH