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Short technological process of preparing metal grains

A metal particle and short-process technology, which is applied in the field of short-process preparation of metal tin particles, can solve the problems of pollution of finished metal particles, low yield of metal particles, high investment in equipment construction, and achieve no slag inclusion size, simple equipment, The effect of reducing energy consumption

Inactive Publication Date: 2006-10-18
XI AN JIAOTONG UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

Its process is mature and can produce qualified products. The main problems are: ①The process is complicated and there are many processing procedures; ②The yield of metal particles is low, less than 78%; ③The energy consumption is high, and more than 22% of the scraps need to be returned to remelt , more than 22% more energy consumption; ④ Huge stamping equipment, large maintenance, low labor productivity; ⑤ High investment in equipment construction; ⑥ Pollution to finished metal particles
Although the size uniformity of metal particles prepared by this technology is high, the energy consumption is high and the efficiency is low, so it cannot be widely used in the preparation of tin (zinc) particles

Method used

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  • Short technological process of preparing metal grains

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Experimental program
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Effect test

Embodiment 1

[0033] Firstly, the metal zinc ingot 1 is placed on the roller table 3 of the preheating chamber 2 for preheating treatment. After the preheating treatment, the temperature of the metal zinc ingot 1 reaches 118° C., and the zinc ingot is preheated by an electric furnace. After the zinc ingot is preheated, it directly enters the melting furnace 4. The melting furnace 4 uses resistance heating, and the temperature in the melting furnace is controlled at 22° C. above the melting point of the metal. After the zinc ingot is melted into molten zinc 5, the molten metal 5 is transported to the holding furnace 7 by using a Φ120mm ceramic tube 6, and the ceramic tube 6 is made of Si 3 N 4 Add 22% ZrO to the ceramic 2 and 14% columnar β-Si 3 N 4 phase and then sintered. The holding furnace 7 uses a ceramic inner heating sleeve 8 for heating, uses a thermocouple with an accuracy greater than 1.5°C to measure the temperature of the molten metal in the holding furnace 7, and uses a temp...

Embodiment 2

[0035] Firstly, the metal tin ingot 1 is placed on the roller table 3 of the preheating chamber 2 for preheating treatment. After the preheating treatment, the temperature of the metal tin ingot 1 reaches 107° C., and the tin ingot is preheated by an electric furnace. After the tin ingot is preheated, it directly enters the melting furnace 4. The melting furnace 4 uses resistance heating, and the temperature in the melting furnace is controlled at 18° C. above the melting point of the metal. After the tin ingot is melted into molten tin 5, the molten metal 5 is transported to the holding furnace 7 by using a Φ100mm ceramic tube 6, and the ceramic tube 6 is made of Si 3 N 4 Add 19% ZrO to the ceramic 2 and 15% columnar β-Si 3 N 4 phase and then sintered. A ceramic heating sleeve 8 is used for heating in the holding furnace 7, and a thermocouple with an accuracy greater than 1.5°C is used to measure the temperature of the molten metal 5 in the holding furnace 7, and a temper...

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Abstract

The short technological process of preparing metal grains includes the first preheating treatment of ingot at 100-120 deg.c; smelting ingot at temperature 15-25 deg.c over the melting point of the metal inside one melting furnace, conveying metal liquid via ceramic pipe to a holding furnace, maintaining the temperature of the holding furnace at 25-28 deg.c over the melting point of the metal, dropping metal liquid through quantitative dropping spouts in the bottom of the holding furnace to cooling water at 15-40 deg.c inside the cooling box below the holding furnace to form metal grains with the retention time of metal grains in water being 10-18 sec, and conveying the metal grains with a bucket elevator to the packing box. Compared with available technology, the present invention has the advantages of short production period, 15-20 % lower power consumption, high efficiency, and high metal grain quality.

Description

technical field [0001] The invention belongs to the technical field of metal particle preparation, and relates to a method for preparing metal particles, in particular to a short-flow process for preparing metal tin (zinc) particles. Background technique [0002] The development of modern industry has higher and higher requirements on the performance of metal steel plates, not only good mechanical properties, but also good corrosion resistance. From the perspective of the material itself, any material with good corrosion resistance and mechanical properties is expensive and difficult to be widely used. The biggest advantage of coated steel is that it has good corrosion resistance, which is generally several to dozens of times higher than ordinary cold-rolled carbon steel in atmospheric corrosion resistance. In addition, it also has good formability and paintability. Therefore, all countries in the world are vigorously developing coated steel sheets,...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 符寒光邢建东陈群蒋志强
Owner XI AN JIAOTONG UNIV
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