Preparation method of sintering body with principal crystalline phase of cordierite by using coal gangue and nickel slag

A coal gangue and cordierite technology, applied in the field of material science, can solve the problem of coal gangue not being effectively used, and achieve the effect of reducing firing temperature and cost

Inactive Publication Date: 2016-03-02
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

At present, coal gangue has been used for power generation and building materials in my country, but a large amount of coal gangue has not been effectively utilized.

Method used

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  • Preparation method of sintering body with principal crystalline phase of cordierite by using coal gangue and nickel slag

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Embodiment Construction

[0016] The coal gangue is crushed and ball-milled by a crocodile crusher and a ball mill, and the nickel slag is ball-milled by a ball mill and passed through a 200-mesh square sieve to obtain coal gangue and nickel slag powder; Mix with 5g nickel slag into a sealed bag, and mix by hand for 15min.

[0017] Put the uniformly mixed dry powder into a stirring vessel, add 10ml of water and stir; after stirring evenly, put it into a cylindrical mold with a diameter of 25mm and a height of 30mm for molding, and then put it in a 45°C oven to dry to constant weight and demould.

[0018] Put the demolded cylindrical body into a high-temperature furnace at 1250°C for 15min, and finally obtain a volume shrinkage rate of 20.1% and an apparent density of 1960kg / m2. 3 , a sintered body with a compressive strength of 42 MPa and cordierite as the main crystal phase.

[0019] like figure 1 Shown: coal gangue: nickel slag = 80%: 20%, the sintered body XRD pattern of the sintered body at a fir...

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Abstract

The invention discloses a preparation method of a sintering body with a principal crystalline phase of cordierite by using coal gangue and nickel slag. The method is characterized by comprising the following steps: evenly mixing coal gangue and nickel slag subjected to ball milling and sieving, adding water to form a Bingham slurry, molding, drying, and calcining the mixture in a high temperature furnace. SiO2 and Al2O3 produced from decomposition of the main mineral composition kaolinite in coal gangue and MgO produced from decomposition of the main mineral composition forsterite in nickel slag at certain temperature are subjected to physical-chemical reaction at more than 1200 DEG C to generate a cordierite phase, so as to prepare the sintering body with principal crystalline phase of cordierite. At the same time, the other impurity mineral components in coal gangue can play a role of fluxing action in the sintering process to reduce the sintering temperature.

Description

technical field [0001] The invention relates to the field of material science, in particular to a method for preparing a sintered body with cordierite as the main crystal phase by utilizing coal gangue and nickel slag. Background technique [0002] Coal gangue is a secondary product produced in the coal mining process. It is a dark gray rock with lower carbon content and harder than coal associated with the coal seam during the coal formation process. The main component of coal gangue is silicon aluminum oxide, and contains a small amount of CaO, MgO, Fe 2 O 3 , FeO, SO 3 , K 2 O, Na 2 O et al. At present, coal gangue has been used for power generation and building materials in my country, but a large amount of coal gangue has not been effectively utilized. [0003] Nickel slag is the solid waste slag produced by smelting nickel-iron alloys. Improper handling will cause pollution to the environment. At present, nickel slag is used as raw materials and additives for new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/622
Inventor 孙道胜王爱国桑迪徐海燕刘开伟李燕李萍
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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