Method for preparing hedenbergite glass ceramics by using lead slag

A technology of glass-ceramic and calcium iron pyroxene, which is applied in the fields of preparing glass-ceramic products from solid waste, environmental protection and resource reuse, can solve the problems of secondary pollution, lead slag cannot be added to cement kiln, etc., and achieve Good environmental and social benefits, excellent performance, uniform composition effect

Active Publication Date: 2015-07-15
山东龙宇玻璃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) Recycling of copper, gold, silver and other precious metals: Since copper and precious metals such as gold and silver are not volatile and remain in the slag, some lead slag has a certain recovery value, and chemical leaching is generally used for copper, gold, silver and other precious metals Recycling, the recycled waste residue is treated in a simple stacking method, which cannot solve the secondary pollution
After the formal implementation of these two standards on March 1, 2014, lead slag cannot continue to be added to the cement kiln for co-processing

Method used

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  • Method for preparing hedenbergite glass ceramics by using lead slag
  • Method for preparing hedenbergite glass ceramics by using lead slag
  • Method for preparing hedenbergite glass ceramics by using lead slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The high-iron lead slag and fly ash are dried and crushed to -100 mesh respectively; the ingredients are tested separately, and the amount of high-iron lead slag, fly ash and pyrolusite is calculated according to the stoichiometric ratio in the table below, and mixed; The final material is heated to 1450°C in the melting furnace at a rate of 7°C / min for melting to a molten state, and is kept for 2 hours to obtain a uniform glass liquid, which is cast into a mold at 580°C to obtain a basic glass; the basic glass is kept at 600°C Annealed for 30 minutes; the annealed base glass was held at 700°C for 50 minutes for nucleation; the base glass after nucleation was held for 2 hours at 900°C for crystallization to obtain glass-ceramics.

[0025] In this embodiment, the glass-ceramic main element content is as follows:

[0026] the element

Fe 2 o 3

SiO 2

CaO

Al 2 o 3

Na 2 o

MgO

ZnO

RO

content

26

40

12

5...

Embodiment 2

[0031] The lead-zinc rotary kiln slag and waste glass are dried and crushed to -100 mesh respectively; the ingredients of the materials are tested respectively, and the amount of lead-zinc rotary kiln slag, waste glass and chromium oxide is calculated according to the stoichiometric ratio in the table below, and mixed ;The mixed material is heated to 1500°C at a rate of 10°C / min in the melting furnace to be smelted to a molten state, kept warm for 2 hours to obtain a uniform glass liquid, and cast into a mold at 600°C to obtain a basic glass; the basic glass is heated at 600°C Annealing was carried out at lower temperature for 30 minutes; the annealed base glass was incubated at 700°C for 60 minutes for nucleation; the nucleated base glass was crystallized at 900°C for 2 hours to obtain glass-ceramics.

[0032] In this embodiment, the glass-ceramic main element content is as follows:

[0033] the element

Fe 2 o 3

SiO 2

CaO

Al 2 o 3

Na 2 ...

Embodiment 3

[0038]The lead fume slag, high iron lead slag and waste glass are dried and crushed to -100 mesh respectively; the components of the materials are tested respectively, and the lead fume slag, high iron lead slag, waste glass and nickel oxide are calculated according to the stoichiometric ratio in the following table The mixed material is heated to 1550°C at a rate of 10°C / min in the melting furnace to be melted to a molten state, kept for 2.5 hours to obtain a uniform molten glass, and cast into a mold at 550°C to obtain a base Glass; the basic glass is annealed at 600°C for 40 minutes; the annealed basic glass is held at 750°C for 60 minutes for nucleation; the nucleated basic glass is crystallized at 900°C for 2 hours to obtain glass ceramics.

[0039] In this embodiment, the glass-ceramic main element content is as follows:

[0040] the element

Fe 2 o 3

SiO 2

CaO

Al 2 o 3

Na 2 o

MgO

ZnO

RO

content

22

44

...

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Abstract

The invention provides a method for preparing hedenbergite glass ceramics by using lead slag, and belongs to the fields of environmental protection and resource recycling. According to the method, the lead slag is used as a main raw material, waste glass and coal ash are added and serve as composition adjustment raw materials, chromic oxide, nickel oxide and pyrolusite are added and serve as coloring agents, the main raw materials and the composition adjustment raw materials are respectively dried, broken and subjected to composition detection, and the main raw materials, the composition adjustment raw materials and the coloring agent are added according to a stoichiometric ratio, mixed, melted, cast, annealed, nucleated and crystallized so as to obtain the hedenbergite glass ceramics with different colors. The prepared glass ceramics meet the standards of industrial glass ceramics and building glass ceramics; and the concentration of heavy metal ions in the prepared glass ceramics is far lower than the limiting value of the leaching concentration of heavy metals, which is stated in Identification standards for hazardous wastes-Identification for extraction toxicity (GB5085.3-2007) of National Standard of the People's Republic of China. The method turns waste into wealth, is simple in technology and low in cost and solves the problem of stockpiling of industrial waste residues such as lead slag and coal ash.

Description

technical field [0001] The invention relates to the field of preparing glass-ceramic products from solid waste, in particular to a method for preparing calcium-ferropyroxene glass-ceramics from lead slag, which belongs to the field of environmental protection and resource reuse. It is suitable for the treatment of lead fuming slag, lead smelting slag, lead-zinc rotary kiln slag and other lead slags involved in the lead smelting process. The invention can prepare glass-ceramics of various colors, meeting the standards of industrial glass-ceramics (JC / T 2097-2011) and architectural glass-ceramics standards (JC / T 872-2000). Background technique [0002] Lead slag is composed of oxides of various metals and nonmetals, and the main chemical composition of slag is SiO 2 , FeO, Fe 2 o 3 , CaO and ZnO, accounting for 90% of the total lead slag. At present, the utilization of lead slag mainly has the following methods: [0003] (1) Production of high-grade cement clinker: lead s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C6/10
Inventor 潘德安张深根保海彬郭斌刘波
Owner 山东龙宇玻璃有限公司
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