Castable and method for manufacturing coke tank lining

A castable and lining technology, used in coke cooling, coke oven, petroleum industry, etc., can solve problems such as low service life, reduce unit cost, reduce tank wall temperature, and have good thermal shock resistance.

Active Publication Date: 2019-05-03
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the service life of the coke tank with this new structure is relatively low, only more than half a year; while the tra

Method used

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  • Castable and method for manufacturing coke tank lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] In Example 1, a castable for manufacturing coke tank lining is provided, and the coke tank lining is a refractory coke tank lining, and its raw material formula is shown in Table 1. Specifically, the castable may include the following chemical components by weight percentage:

[0098] High alumina bauxite with a particle size ranging from 5mm to 8mm: 10%;

[0099] Calcium hexaaluminate with a particle size ranging from 3mm to 5mm: 38%;

[0100] Calcined quartz with a particle size ranging from 1mm to 3mm: 8%;

[0101] Forsterite with particle size less than or equal to 1mm: 15%;

[0102] Magnesia-aluminum spinel with a particle size of 180 mesh: 10%;

[0103] Ethyl silicate: 7%;

[0104] Hydrated alumina with particle size less than 0.088mm: 8%;

[0105] Dextrin: 2%;

[0106] Water reducer: 2%.

[0107] Weigh various materials except ethyl silicate according to the proportions stated in Table 1, then put the above materials into a mixer and mix and stir for 5-8 m...

Embodiment 2

[0116] In Example 2, a castable for manufacturing a coke tank lining is provided. The coke tank lining is a refractory coke tank lining, and its raw material formula is shown in Table 1.

[0117] The method for manufacturing coke tank lining with above-mentioned casting material is the same as embodiment 1, and its main physical and chemical index is as follows:

[0118] Refractory temperature > 1500°C;

[0119] The bulk density after 24 hours at 110°C is 2.2g / cm 3 , and the bulk density after 24 hours at 1200°C is 2.6g / cm 3 ;

[0120] The compressive strength after holding at 110°C for 24 hours is 65MPa, and after holding at 1200°C for 3 hours, the compressive strength is 75MPa;

[0121] The flexural strength after holding at 110°C for 24 hours is 14MPa, and after holding at 1200°C for 3 hours, the flexural strength is 19MPa;

[0122] The thermal conductivity at 350°C is 0.25W / (m·k);

[0123] The change of the burnt line after holding at 1550°C for 24 hours is ±0.3%.

Embodiment 3

[0125] In Example 3, a castable for manufacturing the coke tank lining is provided. The coke tank lining is a refractory coke tank lining, and its raw material formula is shown in Table 1.

[0126] The method for manufacturing coke tank lining with above-mentioned casting material is the same as embodiment 1, and its main physical and chemical index is as follows:

[0127] Refractory temperature > 1500°C;

[0128] The bulk density after 24 hours at 110°C is 2.1g / cm 3 , and the bulk density after 24 hours at 1200°C is 2.6g / cm 3 ;

[0129] The compressive strength after holding at 110°C for 24 hours is 65MPa, and after holding at 1200°C for 3 hours, the compressive strength is 73MPa;

[0130] The flexural strength after holding at 110°C for 24 hours is 13MPa, and after holding at 1200°C for 3 hours, the flexural strength is 18MPa;

[0131] The thermal conductivity at 350°C is 0.26W / (m·k);

[0132] The change of the burnt line after holding at 1550°C for 24 hours is ±0.3%. ...

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Abstract

The invention discloses a castable for manufacturing a coke tank lining. The castable comprises, by weight, 10-22% of high-alumina bauxite having a particle size of 5-8 mm, 20-38% of calcium hexaaluminate having a particle size of 3-5 mm, 6-10% of calcined quartz having a particle size of 1-3 mm, 11-21% of forsterite having a particle size of 1 mm or less, 9-19% of magnesium aluminate spinel having a particle size of 180 meshes, 2-7% of ethyl silicate, 2-10% of hydrated alumina having a particle size of below 0.088 mm, 1-4% of dextrin and 1-3% of a water reducer. The present invention also discloses a method for manufacturing the coke tank lining. The castable of the invention can meet the internal use conditions of the coke tank, and the coke tank lining made from the castable has the advantages of good resistance to the high temperature, wear and thermal shock, low thermal conduction coefficient, long service life, low price and energy saving; and the method has the advantages of simplicity, and easiness in industrialize production.

Description

technical field [0001] The invention relates to the technical field of refractory materials for coke tanks in the coking industry, in particular to a castable for manufacturing coke tank linings and a method for manufacturing coke tank linings. Background technique [0002] The coke tank is one of the important equipments in the CDQ production line. It is used to transport the red coke pushed out from the carbonization chamber. Cooperating with the traction device and the lifting device, the red coke is loaded into the CDQ oven. [0003] At present, the coke tanks of major steel mills in China are mainly composed of welded structural skeletons and alloy linings. The role of the alloy linings is mainly to seal the coke and protect the coke tank structure from being burned out. However, due to the long-term contact of the coke tank alloy lining with red coke at a temperature of about 1000 °C, the alloy lining with high thermal conductivity caused a great loss of red coke heat....

Claims

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Application Information

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IPC IPC(8): C04B35/66C10B39/02
Inventor 王长宝王宏伟王延平胡宁郑晓明王小强王俊
Owner SHANDONG IRON & STEEL CO LTD
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