Compound early strength antifreezing agent of unshaped refractory for aluminate cement

A technology of aluminate cement and refractory materials, which is applied in the field of composite early-strength antifreeze, and can solve problems such as skin bursting and poor lining quality

Active Publication Date: 2010-09-15
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test also found that after adding antifreeze, due to the saturation of salts, the phenomenon of "salting out" appeared, and a large amount of "white hair" grew on the surface of the test block, and the skin burst after heat treatment, which was not good for the quality of the lining.
[0009] Therefore, the method of adding antifreeze commonly used in ordinary concrete to cement refractory castables for winter construction cannot meet the requirements.

Method used

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  • Compound early strength antifreezing agent of unshaped refractory for aluminate cement
  • Compound early strength antifreezing agent of unshaped refractory for aluminate cement
  • Compound early strength antifreezing agent of unshaped refractory for aluminate cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The composition ratio of each component of antifreeze is: ethylene glycol: urea: lithium hydroxide: sodium dodecylsulfonate: FS20: water = 159: 68: 27: 3: 30: 313.

[0030] Concrete preparation steps are as follows:

[0031] In a flask in a water bath at 40°C, add urea to 200g of water and stir thoroughly for 5 to 10 minutes. After the urea is fully dissolved, add lithium hydroxide and FS20 water reducer, stir for 10 minutes to fully dissolve, and then add ethylene glycol in sequence. Alcohol and sodium lauryl sulfate, and finally add the remaining water, stir well to make it uniform, that is, complete the preparation of this antifreeze, and obtain a slightly turbid light brown solution. The whole process takes 20 to 30 minutes.

[0032] The test process and results of using the antifreeze:

[0033] The test materials were prepared according to the actual production of bauxite low cement castable formula. In order to simulate the actual construction environment, the ...

Embodiment 2

[0041] The composition ratio of each component of antifreeze is: ethylene glycol: urea: lithium hydroxide: sodium dodecylsulfonate: sodium tripolyphosphate: water = 175.5: 88.5: 30: 2: 28: 276. It is used in the construction of castables under the ambient conditions of -10°C. Antifreeze preparation process is the same as embodiment 1. The castable test process is the same as in Example 1 except that the test operating environment is -10°C and the 48-hour curing environment after molding is -10°C. The test data records are shown in Table 3:

[0042]Table 3 The test data after adding this antifreeze and standard curing under the test condition of -10°C

[0043]

[0044] As can be seen:

[0045] (1) Under the test condition of -10°C, the castable uses the antifreeze agent of this example, and reaches a certain safe demoulding strength after 2 days of curing, indicating that this product meets the requirements of antifreeze and early strength, and can shorten the constructio...

Embodiment 3

[0049] The weight composition ratio of each component of the antifreeze agent is: ethylene glycol: urea: sodium aluminate: emulsifier OP-10: FS20: water = 202.5: 90: 45: 3: 30: 229.5. It is used in the construction of castables under the environmental conditions of -15°C. Antifreeze preparation process is the same as embodiment 1. The castable test process is the same as in Example 1 except that the test operating environment is -15°C and the 48-hour curing environment after molding is -15°C. The test data records are shown in Table 4:

[0050] Table 4 The test data after adding this antifreeze and standard curing under the test condition of -15°C

[0051]

[0052] As can be seen:

[0053] (1) Under the test condition of -15°C, the castable uses the antifreeze agent of this example, and reaches a certain safe demoulding strength after 2 days of curing, indicating that this product meets the requirements of antifreeze and early strength, and can shorten the construction p...

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Abstract

The invention relates to a compound antifreezing agent for an unshaped refractory, mainly relating to a compound early strength antifreezing agent of an unshaped refractory for aluminate cement. The compound early strength antifreezing agent comprises the following components of ethanediol, urea, one of lithium hydroxide or sodium aluminate, one of sodium dodecyl sulfate or OP-10 emulsifier or triterpenoidal saponin, one of organic water reducing agent FS20 or inorganic water reducing agent sodium tripolyphosphate or inorganic water reducing agent sodium hexametaphosphate and water according to the weight constituent ratio of 135-202.5:68-100:27-45:1-3:25-30:229.5-314. The compound early strength antifreezing agent has the characteristics of good effects of freeze protection and early strength, good construction performance and small influence on the high temperature property of the refactroy, and is suitable for the winter construction of the castable refractory and the gunning refractory at the temperature not lower than 15 DEG C below zero.

Description

technical field [0001] The invention relates to an antifreeze agent for unshaped refractory materials, and mainly relates to a composite early-strength antifreeze agent for unshaped refractory materials combined with aluminate cement. Background technique [0002] Construction in winter has a greater impact on monolithic refractories. Taking castables as an example, low ambient temperature will first lead to unsatisfactory fluidity of castables, which directly affects its actual construction, and is related to the compactness, uniformity and construction effectiveness of castables; secondly, it will reduce the water content of cement. The hardening rate of the castable is slow, which affects the construction speed. [0003] At present, the winter construction of refractory castables mainly adopts measures such as heating raw materials, heat storage and heat preservation methods, greenhouse methods and external heating methods to maintain a certain curing temperature for the...

Claims

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Application Information

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IPC IPC(8): C04B24/16C04B22/16C04B24/12
Inventor 王守业张新曹喜营张军王战民张晔张三华
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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