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Long-service-life steel flowing groove and manufacturing die and manufacturing method of long-service-life steel flowing groove

A manufacturing method and long-life technology, applied in the manufacture of tools, molds, mold auxiliary parts, etc., can solve the problems of difficulty in controlling the uniformity of mixing steel fibers and refractory materials, fluctuations in the service life of refractory materials, and affecting the integrity of the overall structure, etc. , to achieve the effects of controlling manufacturing costs, strengthening the bonding force in the vertical direction, and long service life

Active Publication Date: 2020-06-12
JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, while showing good mechanical properties, the addition of steel fibers also has some disadvantages: for example, the use temperature should be controlled below the softening point of steel fibers; at the same time, it is difficult to control the uniformity of steel fibers mixed with refractory materials. During segregation, the structural stress at high temperature will concentrate on the part with few steel fibers, causing stress cracking during long-term use. This stress cracking directly affects the integrity of the overall structure, resulting in fluctuations in the service life of steel fiber reinforced refractories.
[0010] However, the content of how to realize the orientation and reasonable distribution of steel fibers is not involved in the patents and documents of using steel fibers (stainless steel fibers) to strengthen refractory castables.

Method used

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  • Long-service-life steel flowing groove and manufacturing die and manufacturing method of long-service-life steel flowing groove
  • Long-service-life steel flowing groove and manufacturing die and manufacturing method of long-service-life steel flowing groove
  • Long-service-life steel flowing groove and manufacturing die and manufacturing method of long-service-life steel flowing groove

Examples

Experimental program
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Effect test

Embodiment 1

[0071] (1) Mixing step, pellets (quartz pellets, the silicon oxide content is not less than 98wt%, particle size is 2-6mm), high temperature binder (magnesia fine powder, particle size is ≤0.5mm) and fine powder refractory material (silica fine powder, its silicon oxide content is not less than 99.5wt%, particle size is ≤0.5mm) total weight is about 150kg, wherein, the silicon refractory material consumption used is 148.5kg, Magnesia fine powder consumption is 1.5kg. Among the siliceous refractories, the amount of quartz pellets is 118.8kg, and the amount of siliceous fine powder is 29.7kg. In the mixer, pre-mix the silica fine powder and magnesium oxide fine powder evenly, and then mix with the quartz pellets. After mixing, add 12kg of water, continue mixing for about 8 minutes, and then add 6kg of pre-mixed Stainless steel fiber (stainless steel grade: 446#), of which, the dosage of the first specification (20~25)×(0.4~0.7)mm of stainless steel fiber is 4.8kg; the second sp...

Embodiment 2-11 and comparative example 1

[0077] Compared with Example 1, Examples 2-11 and Comparative Example 1 are the same as Example 1 except that the composition of the stainless steel fibers and the amount thereof are different (see Table 1 for details), and the dimensions of the flow channels obtained are all the same. The performance of the laundering channel manufactured in Examples 2-11 and Comparative Example 1 (accumulated amount of steel passed in the service life) is shown in Table 1 below. The judgment standard of the service life is that there are obvious cracks in the flow steel channel, and its depth extends to the runner shell, making it impossible to continue to use.

[0078] Stainless steel fiber situation and product performance added in table 1 embodiment 1-11 and comparative example 1

[0079]

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Abstract

The invention discloses a manufacturing method of a long-service-life steel flowing groove. The manufacturing method comprises the following steps: mixing 95-99wt% of siliceous castable and 1-5wt% ofa high-temperature binder in a mixer; then adding water which accounts for 6-10wt% of the mass of the refractory castable raw materials, and continuously mixing for about 5-10min; and finally, addinga mixture of stainless steel fibers (accounting for 80-90wt% of the weight of the stainless steel fibers) with the specification of (20-25) mm * (0.4-0.7) mm and stainless steel fibers with the specification of (25-35) mm * (0.8-1.2) mm, mixing for about 5-10 minutes, stopping mixing, and discharging for later use; and then forming and sequentially carrying out normal-temperature drying treatmentand heating drying treatment to obtain a finished product of the steel flowing groove. The invention further discloses thelong-service-life steel flowing groove and a die for preparing the long-service-life steel flowing groove.

Description

technical field [0001] The invention belongs to the technical field of smelting and metal manufacturing equipment, and relates to a small and medium-sized ladle, in particular to a long-life ladle, a manufacturing mold and a manufacturing method thereof. Background technique [0002] In the iron and steel metallurgy, non-ferrous metal and foundry industrial processes, laundering troughs (or pouring steel troughs, runners, etc.) are used. The function of the laundering troughs is to transport molten steel (black or colored). When in use, the molten steel is poured from the upper container (such as a smelting furnace or a ladle) to the steel receiving end (or the designed steel receiving port) of the flow steel channel, and the molten steel flows along the flow steel channel to the lower steel port at the tail end. Leak into the next-level container (such as ladle, tundish, cast ingot mold or mold, etc.). The steel flow channel is a component that is used many times, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/14C04B35/76B28B7/28B28B7/16B28B7/00B28B1/54B28B1/52B28B1/087B22D41/54
CPCC04B35/66C04B35/14C04B35/76B28B1/523B28B1/54B28B1/087B28B7/16B28B7/0002B28B7/28B22D41/54C04B2235/3206C04B2235/5427C04B2235/526C04B2235/5264C04B2235/602C04B2235/606
Inventor 王建周少雄张广强邢彦兴李宗臻
Owner JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD
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