Tubular filter capable of automatically discharging slag for metal melt and working method of tubular filter

A technology of metal melt and working method, which is applied in the direction of fixed filter elements, chemical instruments and methods, and filtration circuits, can solve the problems of surface defects, poor mechanical properties of aluminum materials, and high filtration costs, so as to improve service life, The effect of reducing hydrogen content and reducing labor intensity

Pending Publication Date: 2021-09-03
FUJIAN METAL NEW ALU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the aluminum melt must be degassed and filtered before casting, otherwise it will lead to poor mechanical properties of the produced aluminum, surface defects, pores, cracks and other defects, which will restrict the development of high-performance aluminum alloy materials.
[0003] The filter devices currently on the market have high energy consumption of consumables, high filtration costs, and poor slag removal effect

Method used

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  • Tubular filter capable of automatically discharging slag for metal melt and working method of tubular filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] like figure 1 As shown, a self-slag-discharging tubular filter for metal melts includes a closed filter box 1; both ends of the filter box 1 are provided with flow channels along the flow direction of the metal melt from front to back and sequentially connected to the external launder. The molten metal inlet 2, the molten metal outlet 3; the inside of the filter box 1 is divided into a filter chamber 5 at the upper part and an underflow chamber 6 at the lower part by a partition 4; the molten metal inlet 2 is connected with the filter chamber 5 The metal melt outlet 3 communicates with the underflow chamber 6; the partition plate 4 is provided with a plurality of ceramic filter tubes 7 at intervals; the through hole 8 at the bottom of the ceramic filter tube 7 communicates with the underflow chamber 6; The through hole 8 is provided with a venting plug 9; the venting plug 9 communicates with the air intake pipe 10 connected to the outside; the top of the ceramic filter ...

experiment example 1

[0046] Casting 5052 aluminum alloy flat ingots, in which the online degassing purification equipment is a double-rotor online degasser + a self-discharging slag tube filter.

[0047] 5052 aluminum alloy in the melting furnace, Si0.102%, Fe0.290%, Cu0.024%, Mn0.059%, 2.5%, Cr0.18%, Zn0.02%, Ti 0.028%, the rest is aluminum and unavoidable of impurities.

[0048] On the converter process, the slag content is 0.68mm2 / kg and the hydrogen content is 0.262ml / 100gAl measured by the off-line slag measuring instrument; the off-line slag content is 0.52mm2 / kg, the hydrogen content is 0.11ml / 100gAl; the slag content is 0.011mm2 / kg, and the hydrogen content is 0.099ml / 100gAl measured by the off-line slag measuring instrument behind the self-slagging tubular filter;

experiment example 2

[0050] Casting 3003 aluminum alloy flat ingots, in which the online degassing purification equipment is a double-rotor online degasser + a self-discharging slag tube filter.

[0051] 3003 aluminum alloy in the melting furnace, Si0.102%, Fe0.450%, Cu0.074%, Mn1.06%, Mg0.02%, Cr0.003%, Zn0.02%, Ti 0.018%, the rest is aluminum and unavoidable impurities.

[0052] On the converter process, the slag content is 0.65mm2 / kg and the hydrogen content is 0.271ml / 100gAl measured by the off-line slag measuring instrument; the slag content is 0.51mm2 / off-line between the double-rotor degasser and the self-slagging tubular filter kg, the hydrogen content is 0.108ml / 100gAl; the slag content is 0.011mm2 / kg, and the hydrogen content is 0.095ml / 100gAl measured by the off-line slag measuring instrument behind the self-slagging tubular filter.

[0053] The invention removes the impurities adsorbed on the surface of the ceramic filter tube by blowing air during the filtering process and the end st...

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Abstract

The invention discloses a tubular filter capable of automatically discharging slag for a metal melt. The tubular filter comprises a closed filter box, wherein a metal melt inlet and a metal melt outlet which are sequentially communicated with an external runner from front to back in the flowing direction of the metal melt are formed in the two ends of the filter box; the interior of the filter box is divided into a filter chamber positioned at the upper part and an underflow chamber positioned at the lower part by a partition plate; the metal melt inlet is communicated with the filtering chamber; the metal melt outlet is communicated with the underflow chamber; a plurality of ceramic filter pipes are arranged on the partition plate at intervals; a through hole in the bottom of each ceramic filter pipe is communicated with the underflow chamber; a vent plug is arranged in each through hole; each vent plug is communicated with an air inlet pipe communicated with the outside; the top of each ceramic filter pipe is communicated with an exhaust pipe communicated with the outside through a valve; and a slagging-off opening is formed in the top of the filter box. In the filtering process and the ending stage, impurities adsorbed on the surface of the ceramic filter pipes are removed through gas blowing, hydrogen is taken away, and the purpose of degassing is achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum melt smelting, in particular to a self-discharging tubular filter for metal melt. Background technique [0002] Improving the purity of aluminum melt has become an extremely critical means to produce high-quality, high-performance advanced aluminum materials. Aluminum and its alloys are one of the alloys most polluted by inclusions and hydrogen, and their purity will greatly affect the quality of the metal. The purity of aluminum is mainly determined by dissolved hydrogen and non-metallic inclusions. Hydrogen is the only gas that dissolves in a large amount in aluminum melt. The solubility of hydrogen in aluminum liquid phase and solid phase is 0.65ml / 100gAl and 0.034ml / 100gAl, the difference is about 19.1 times. The inclusions in the aluminum melt are mainly formed by the reaction of aluminum and oxygen during the melting process, in addition to the water vapor reaction and the furnace charge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/33B01D29/52B01D29/68B01D36/00C22B9/02C22B9/05C22B21/06
CPCB01D29/33B01D29/52B01D29/68C22B21/066C22B9/05B01D36/001Y02P10/20
Inventor 柯东杰柯昱成陈群李宇航范敬盛游昌开林康董芳桦潘伟
Owner FUJIAN METAL NEW ALU TECH
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