Chromium iron slag processing method and ceramic tiles

A technology for ferrochromium slag and ceramic bricks, which is applied in the production, application, household appliances and other directions of ceramic materials, can solve the problems of residents' life safety threats, the need for further development of ferrochromium slag, and environmental impact, and achieve significant economic and environmental benefits. , the effect of broadening resource utilization and reducing consumption

Pending Publication Date: 2018-05-01
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrochrome slag contains a relatively high content of Cr 2 o 3 , and some high-valence ions exist, long-term stockpiling treatment will not only bring a great impact on the environment, but also the water in the ferrochrome slag will seep into the groundwater, which will also pose a great threat to the life safety of residents
[0003] However, the existing means of treating ferrochromium slag still need to be further developed

Method used

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  • Chromium iron slag processing method and ceramic tiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Follow the steps below to prepare ceramic tiles from ferrochrome slag:

[0051] (1) Mix ferrochrome slag, clay and sandstone according to the mass ratio of 50:30:20.

[0052] The main components in ferrochrome slag are CaO 3%, SiO 2 30%, MgO 25%, Al 2 o 3 20%, Cr 2 o 3 8%, TiO 2 0.3%, TFe 3%, (K 2 O+Na 2 O) 0.4%,

[0053] The mass percentage of the main component in the clay is SiO 2 70%, Al 2 o 3 10%.

[0054] The mass percentage of the main component in sandstone is SiO 2 90%.

[0055] (2) Crushing and mixing the above-mentioned materials, transporting them into a ball mill for grinding treatment, so as to obtain powdery materials, and the mass percentage of powders with a particle size of not higher than 45 μm in the powdery materials is 90%.

[0056] (3) The finely ground powdery material is subjected to spray granulation, and the particle size of the obtained granular material is about 1mm.

[0057] (4) The granular material is pressed and for...

Embodiment 2

[0063] Follow the steps below to prepare ceramic tiles from ferrochrome slag:

[0064] (1) Mix ferrochrome slag and clay according to the mass ratio of 80:20.

[0065] The main components in ferrochrome slag are CaO 2%, SiO 2 25%, MgO 30%, Al 2 o 3 15%, Cr 2 o 3 10%, TiO 2 0.5%, TFe 4%, (K 2 O+Na 2 O) 0.2%,

[0066] The mass percentage of the main component in the clay is SiO 2 60%, Al 2 o 3 20%.

[0067] (2) The above materials are crushed and mixed, and transported into a ball mill for grinding treatment, so as to obtain powdery materials, in which the mass percentage of powder with a particle size not higher than 45 μm is 96%.

[0068] (3) The finely ground powdery material is subjected to spray granulation, and the particle size of the obtained granular material is about 0.5 mm.

[0069] (4) The granular material is pressed and formed to form a raw material board of a certain size, and the forming pressure is 15 MPa.

[0070] (5) Place the raw board in ...

Embodiment 3

[0075] Follow the steps below to prepare ceramic tiles from ferrochrome slag:

[0076] (1) Mix ferrochrome slag, clay and sandstone in a mass ratio of 65:25:10.

[0077] The main components in ferrochrome slag are CaO 2.5%, SiO 2 28%, MgO 27%, Al 2 o 3 18%, Cr 2 o 3 9%, TiO 2 0.4%, TFe 3.5%, (K 2 O+Na 2O) 0.3%,

[0078] The mass percentage of the main component in the clay is SiO 2 65%, Al 2 o 3 15%.

[0079] The mass percentage of the main component in sandstone is SiO 2 88%.

[0080] (2) crushing and mixing the above-mentioned materials, transporting them into a ball mill for grinding treatment, so as to obtain powdery materials, the mass percentage of powders with a particle size not higher than 45 μm in the powdery materials is 94%.

[0081] (3) Spray and granulate the pulverized material, and the particle size of the obtained granular material is about 0.7 mm.

[0082] (4) The granular material is pressed and formed to form a raw material board of a c...

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Abstract

The invention discloses a chromium iron slag processing method and ceramic tiles. The method comprises the following steps: (1) performing mixing on the chromium iron slag, clay and sandstone to obtain a mixture; (2) performing fine grinding treatment on the mixture to obtain a powdery material; (3) performing spraying granulation treatment on the powdery material to obtain a particle material; (4) performing molding treatment on the particle material to obtain raw material boards; and (5) performing drying treatment and firing on the raw material boards to obtain the ceramic tiles. Accordingto the method, high-quality ceramic tiles can be prepared by effectively using metallurgical scrap chromium iron slag, so that a new way for resource utilization of the chromium iron slag is opened up, therefore, the method has significant economic and environmental benefits.

Description

technical field [0001] The invention relates to the field of building materials, in particular, the invention relates to a method for treating ferrochrome slag and ceramic bricks. Background technique [0002] In my country, in the process of preparing ferrochrome alloys from chromite ore, about 4 to 5 million tons of ferrochrome slag, also known as ferrochrome slag, are produced every year. Ferrochromium slag contains a relatively high content of Cr 2 o 3 , and there are some high-valence ions, long-term stockpiling treatment will not only have a great impact on the environment, but also the moisture in the ferrochrome slag will seep into the groundwater, which will also pose a great threat to the life safety of residents . [0003] However, the existing means of treating ferrochromium slag still need to be further developed. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B33/138C04B35/626
CPCC04B33/13C04B33/138C04B35/6261C04B35/62695C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3232C04B2235/3241C04B2235/3272C04B2235/3418Y02P40/60
Inventor 孙辉边妙莲马冬阳陈士朝苏双青李亚奇吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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