Method for measuring expansion times of continuous casting tundish covering agent
A technology of continuous casting tundish and expansion ratio, which is applied to the configuration of indicating equipment/measuring equipment, casting equipment, manufacturing tools, etc., can solve problems such as the detection method of expansion ratio of tundish covering agent that has not been tested, and achieve a clear melting structure. , good reproducibility, low cost of measurement
Inactive Publication Date: 2013-10-02
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology
[0005] There is no report on the detection method of the expansion multiple of the tundish covering agent in China
Method used
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Embodiment 1
[0017] Embodiment 1, embodiment 2 place of origin is China, number is BG1 # , BG2 # Tundish covering agent, expansion multiple after 40 minutes after putting the sample into the tester, testing steps and results:
[0018] (a) Before testing the expansion ratio of the tundish covering agent, the moisture contained in the sample must be determined. If the moisture content is >1 wt%, the sample must be dried in a box-type drying oven to make the moisture content # The water content is 0.60wt%, sample BG1 # The moisture content of the coating is 0.56 wt%, and the moisture content is less than 1 wt%, and the expansion multiple test of the covering agent is directly used as it is;
[0019] (b) Use a sample measuring device to measure the volume to be 230×230×25mm 3 The original covering agent, sealed in the sample bag;
[0020] (c) RTB-1 thermal characteristic tester is selected as the sample tester. The tester is composed of heating system, temperature control and recording sy...
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The invention relates to a method for measuring the expansion times of a continuous casting tundish covering agent. The method is characterized by comprising the following steps: (a), a covering agent sample is measured through a sample measuring device and sealed in a sample bag; (b), a thermal property tester is selected as a sample tester, a furnace body of the tester is heated to 1400 DEG C, and the temperature is kept constant for 30-40 min; (c), the covering agent sample is placed in a hearth quickly, the covering agent sample is placed flat, and a heat supply system of the tester is switched off after the constant temperature of 1400 DEG C is kept for 40 minutes; (d), when the temperature of the tester falls to 600 DEG C, a test system is closed; (e), the height of the covering agent sample is measured at the positions 50mm away from four diagonal corners of the hearth and at the center of the hearth, namely, five positions are chosen for obtaining test data all together, the average value of the test data is obtained, the height of the original sample is divided by the average value, and the obtained result is the expansion times of the covering agent. The method for measuring the expansion times of the continuous casting tundish covering agent has the advantages of being rapid, simple, convenient, good in data reliability and reproducibility, and capable of truly reflecting the expansion conditions of the tundish covering agent on a molten steel surface, thereby providing guidance for producers and users of the continuous casting tundish covering agent.
Description
technical field [0001] The invention relates to a method for measuring the expansion multiple of a continuous casting tundish covering agent, belonging to the technical field of steelmaking. Background technique [0002] The continuous casting tundish covering agent is an auxiliary material for continuous casting. It is added on the surface of molten steel in the tundish during the steelmaking and casting process, and gradually melts on the hot molten steel surface to form a slag pool. The slag pool is composed of a layered structure of powder-melt-liquid slag. The powder layer has low density and good thermal conductivity. The slow mainly plays the role of heat insulation and heat preservation to prevent heat dissipation; the liquid slag layer absorbs and dissolves the inclusions floating from the molten steel to the steel slag interface, purifies the molten steel, and forms a solid-liquid composite slag film during the melting stage to prevent oxygen in the air from enteri...
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IPC IPC(8): B22D2/00B22D11/111B22D1/00
Inventor 王敏张怀军
Owner INNER MONGOLIA BAOTOU STEEL UNION