Adhesive of carbon brick of blast-furnace crucible and thermocouple and filling method thereof

Abstract

The invention discloses an adhesive of a carbon brick of a blast-furnace crucible and a thermocouple. The adhesive comprises the following components by percent volume: 70-80% of electrically calcined anthracite, 1.5-2.5% of quartz, 7-9% of a p-toluenesulfonic acid reagent, 10-12% of thermosetting phenol resin or anhydrous resin and 5.5-8.5% of an ethanol or methylbenzene diluent. The invention further discloses a filling method of the carbon brick of the blast-furnace crucible and the thermocouple. The adhesive is made of an anhydrous carbon adhesive material, has the characteristic of high self-bonding strength, can be cured at normal temperature, is good in heat resistance, and has certain adhesion strength at low and high temperatures. In addition, the adhesive does not rust and corrode metal materials such as copper and cast iron, and can satisfy the installation and operation demands of the thermocouple.

Description

technical field [0001] The invention relates to a refractory filling material, in particular to an adhesive for blast furnace hearth carbon bricks and thermocouples and a filling method thereof. Background technique [0002] When the blast furnace is newly built and overhauled, it is necessary to pre-embed the hearth carbon brick thermocouple to detect the hearth erosion. Among them, the long one of the two galvanic couples tops the top of the carbon brick groove, and the short one is attached to the side of the upper layer of carbon bricks, and then filled with carbonaceous ramming material and compacted, the purpose is to make The close contact between the galvanic couple and the carbon brick can transmit the temperature to the galvanic couple in a timely and true manner. In this way, it can be ensured that the two galvanic couples measure the temperature difference between the 100mm carbon bricks, and the residual thickness of the hearth can be calculated and deduced to ...

AI Technical Summary

Problems solved by technology

However, when the thermocouple is installed, although the gap left in the middle is filled with refractory materials, it cannot be completely dense, which seriously affects the temperature display of the thermocouple.

Moreover, in the normal production of the blast furnace, the air gap between the cooling wall, the refractory material and the furnace skin is formed due to the gasification caused by the stress change and the water leakage at the tuyeres, which will cause the production displacement of the pre-installed thermocouples.

[0003] At present, the traditionally used CC-3B carbon material or Megmet and other refractory materials, either because they cannot be cured or have poor compatibility, cannot solve the above problems caused by the installation of the galvanic couple, and the temperature measured by the galvanic couple after filling Can not truly reflect the carbon brick temperature

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