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A heat-resistant and anti-corrosion metal magnesium refining pot and its preparation method

A technology of metal magnesium and refining pots, applied in heat treatment equipment, manufacturing tools, heat treatment furnaces, etc., can solve the problems of high thermal creep, poor corrosion resistance of refining pots, and cracking of pots, so as to improve heat resistance and prevent Corrosion, excellent comprehensive mechanical properties, and the effect of reducing casting porosity

Active Publication Date: 2021-01-15
府谷县旭丽机电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the integrated pot mainly adopts sand casting, which has the advantage of simple preparation process, but in the process of smelting and crystallization of heat-resistant steel, there are internal structure inhomogeneity, coarse grains, serious deterioration of plasticity and toughness, and there are difficulties in casting steel parts. Casting defects that are completely avoided, such as shrinkage porosity, pores, sand holes, etc., will inevitably lead to a decrease in the safety and reliability of the refining pot; at the same time, due to the unreasonable formula of alloying elements, the refining pot has poor corrosion resistance and large thermal creep. These reasons are all It is the leakage or deformation of the porosity in the refining pot, which seriously leads to the cracking of the pot, and then a catastrophic safety accident.
The actual use in Yulin Tianlong Magnesium Industry Co., Ltd., Fugu County Taida Coal Chemical Co., Ltd., and Fugu Jingfu Coal Chemical Co., Ltd. shows that the integrated sand casting pot has poor heat resistance, poor thermal creep resistance, and poor anti-corrosion performance. More serious, restricting the refining and production of magnesium metal

Method used

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  • A heat-resistant and anti-corrosion metal magnesium refining pot and its preparation method
  • A heat-resistant and anti-corrosion metal magnesium refining pot and its preparation method
  • A heat-resistant and anti-corrosion metal magnesium refining pot and its preparation method

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preparation example Construction

[0028] A method for preparing a metal magnesium refining pot, comprising the following steps:

[0029] Step 1, according to the material matching and design drawings of the integrated casting refining pot (such as Figure 1 to Figure 5 shown), formulate the corresponding casting process; use the lost foam model to prepare by vacuuming; the feeding sequence of the melting furnace: heat-resistant steel → high ferrochrome → low ferrochrome → ferromanganese → ferrosilicon → ferromolybdenum → rare earth for smelting, During the smelting process, the protective gas nitrogen is introduced, and the casting is performed after the smelting is completed; the casting temperature is 1620±5°C, the casting time is 30-50s, and the casting method is the side wall riser casting of the refining pot;

[0030] Step 2: After cleaning the cast body, put it into a heat treatment furnace for heating, the heating temperature is 1050-1100°C, and keep it warm for 1.8-2.5 hours; then put it into an oil po...

Embodiment 1

[0035] A heat-resistant and anti-corrosion metal magnesium refining pot. The mass percentage of the chemical composition of the metal magnesium refining pot is: 0.4%C, 16%Cr, 3%Mn, 1.6%Si, 0.1%Ni, 0.02%Mo, 0.6%N, 0.01% S, 0.01% P, 0.12% rare earth, the balance is Fe.

[0036] The above-mentioned refining pot preparation method adopts the lost foam vacuuming method, that is, the integrated refining pot is obtained by using the lost foam (expandable polystyrene resin beads) casting method.

[0037] A method for preparing a metal magnesium refining pot, comprising the following steps:

[0038] Step 1, according to the material matching and design drawings of the integrated casting refining pot (such as Figure 1 to Figure 5 shown), formulate the corresponding casting process; use the lost foam model to prepare by vacuuming; the feeding sequence of the melting furnace: heat-resistant steel → high ferrochrome → low ferrochrome → ferromanganese → ferrosilicon → ferromolybdenum → ra...

Embodiment 2

[0043] A heat-resistant and anti-corrosion metal magnesium refining pot. The mass percentage of the chemical composition of the metal magnesium refining pot is: 0.65%C, 21%Cr, 5%Mn, 2.0%Si, 0.2%Ni, 0.03%Mo, 1.2%N, 0.018% S, 0.018% P, 0.2% rare earth, the balance is Fe.

[0044] The above-mentioned refining pot preparation method adopts the lost foam vacuuming method, that is, the integrated refining pot is obtained by using the lost foam (expandable polystyrene resin beads) casting method.

[0045] A method for preparing a metal magnesium refining pot, comprising the following steps:

[0046] Step 1, according to the material matching and design drawings of the integrated casting refining pot (such as Figure 1 to Figure 5 shown), formulate the corresponding casting process; use the lost foam model to prepare by vacuuming; the feeding sequence of the melting furnace: heat-resistant steel → high ferrochrome → low ferrochrome → ferromanganese → ferrosilicon → ferromolybdenum → ...

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Abstract

The invention discloses a metallic magnesium refining kettle and a preparation method thereof. The metallic magnesium refining kettle is prepared through an evaporative pattern model in a vacuum pumping method. The charging sequence of a smelting furnace comprises heat-resistant steel, high-chromium iron, low-chromium iron, ferromanganese iron, silicon iron and ferro-molybdenum. The casting temperature is 1620+ / -5 DEG C. The casting time is 30-50 s. The casting method comprises the steps of conducting casting from a riser on the sidewall of the refining kettle; cleaning and putting a casting body into a heat treatment furnace to be heated at 1050-1100 DEG C and conducting heat preservation for 1.8-2.5 h; putting the casting body into an oil bath to be subjected to oil cooling; grinding theround edge of a kettle opening and removing the riser through machining; and finally detecting whether the refining kettle is qualified or not through ultrasonic waves and then conducting classification and warehousing. The refining kettle prepared through the method has the heat-resistant strength and good heat creep properties and corrosion resistance, and the using safety and reliability of the refining kettle can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metal magnesium refining equipment preparation, and in particular relates to a heat-resistant and anti-corrosion metal magnesium refining pot and a preparation method thereof. Background technique [0002] Refining pot is the smelting equipment in metal magnesium refining equipment. Its function is to smelt crude magnesium, improve the purity of magnesium, and provide metal magnesium with good performance and less impurities for the user of metal magnesium raw materials. It has the functions of smelting crude magnesium and transferring metal magnesium liquid, etc. Features. The refining pot is the key equipment for refining metal magnesium. It has the function of smelting crude magnesium. It is used under harsh conditions, and the working conditions are particularly harsh during smelting. In addition to the normal high temperature environment, it is also subjected to high temperature corrosion and thermal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/44C22C38/58C22C33/06C21D1/18C21D9/00
CPCC21D1/18C21D9/0068C22C33/06C22C38/001C22C38/005C22C38/02C22C38/44C22C38/58
Inventor 王旭东
Owner 府谷县旭丽机电技术有限公司
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