A Metal/Ceramic Layered Composite Internal Heater

A composite material and inner heater technology, applied in the direction of the heating element shape and other directions, can solve the problems of reducing the brittleness of the ceramic inner heater, unable to make a large-sized outer casing, difficult to process and manufacture ceramics, etc., and achieve good resistance to zinc liquid corrosion. , Easy to install, not easy to zinc slag effect

Active Publication Date: 2016-09-07
TIANJIN GONGDA GALVANIZING EQUIP CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent (new application) with the application number of 2014106056655 discloses a liquid zinc corrosion resistant alloy inner heater. The outer sleeve of the inner heater is made of tungsten-molybdenum alloy. The technology cannot make a large size outer casing over one meter
Yang Wanli and others studied the preparation process and performance of SiC composite ceramic material as the outer casing of the inner heater (Yang Wanli, Shi Zhongqi, Jin Zhijie. Preparation and performance of SiC composite ceramic inner heater casing, Journal of Silicate Society , 2012,40(3):362-365), the brittleness of SiC ceramics was improved to a certain extent through the multi-phase composite process, but the sleeves made of ceramics and ceramic composite materials were prepared by this method. Complicated and costly, the application of the inner heater sleeve made of this composite material to industrial production still cannot fundamentally solve the brittleness problem of ceramics
[0003] In order to reduce the brittleness of the ceramic inner heater, the metal / ceramic layered composite inner heater can be applied to the inner heating of the pot body in the industrial range, with high heating efficiency and energy saving, especially suitable for heating some highly corrosive substances. In the occasions where the corrosion resistance of the outer casing of the heater is high, but as a structural material, ceramics are brittle materials and are very sensitive to defects. The inherent high strength and brittleness of ceramics make it difficult to process and manufacture

Method used

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  • A Metal/Ceramic Layered Composite Internal Heater
  • A Metal/Ceramic Layered Composite Internal Heater
  • A Metal/Ceramic Layered Composite Internal Heater

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This embodiment adopts the above-mentioned preparation method and assembly process. The outer casing 1 of the heater in this embodiment is cylindrical with the bottom end sealed and the upper end open; the ceramic layer 11 is made of silicon carbide, and its length is 1000mm, the inner diameter is 130mm, and the wall thickness is 20mm; the metal layer 13 is made of stainless steel pipe , the length of the stainless steel tube is 972mm, the inner diameter is 120mm, and the thickness is 4mm. The mass percent composition of the bonding alloy 12 is Al: 75%, Ti: 5%, Cu8%, Si: 12%; the bonding alloy 12 is a solid-liquid two-phase at the service temperature, and the thickness of the bonding alloy layer 12 is 2mm. The heating core 3 is composed of four sets of U-shaped electric heating tubes, 6 partitions are evenly distributed on the heating core, and the antioxidant 4 is in the form of nano-scale powder.

[0030] Add 7.5kg of pure aluminum to a crucible boiler in a nitrogen...

Embodiment 2

[0040] This embodiment adopts the above-mentioned preparation method and assembly process. In the present embodiment, the outer sleeve 1 of the heater is a cuboid whose bottom end seals the upper end opening (see image 3 ); the ceramic layer 11 is made of silicon nitride, its length is 1800mm, its inner diameter is 200mm, and its wall thickness is 20mm; the metal layer 13 is made of carbon steel, its length is 1772mm, its inner diameter is 182mm, and its thickness is 4mm. The mass percentage composition of the bonding alloy 12 is Al: 68%, Ti: 10%, Cu8%, Si: 14%; the thickness of the bonding alloy layer 12 is 10 mm. The antioxidant 4 is nano-scale powder, and the heating core 3 is composed of six sets of U-shaped electric heating tubes.

Embodiment 3

[0042] This embodiment adopts the above-mentioned preparation method and assembly process. The outer casing 1 of the heater in this embodiment is a cuboid whose bottom end is sealed and the upper end is open; the ceramic layer 11 is made of alumina ceramic material, and its length is 1500mm, the inner diameter is 160mm, and the wall thickness is 20mm; the metal layer 13 is made of carbon steel Made of carbon steel, the length is 1482mm, the inner diameter is 150mm, and the thickness is 4mm. The mass percentage composition of the bonding alloy 12 is Al: 83%, Ti: 5%, Cu3%, Si: 9%; the thickness of the bonding alloy layer 12 is 2.5 mm. The antioxidant 4 is a nanoscale powder, and the heating core 3 is composed of four sets of U-shaped electric heating tubes.

[0043] The bonding alloy 12 in embodiment 1, embodiment 2 and embodiment 3 are all solid-liquid two phases at the service temperature, the volume ratio of solid phase is 60-80%, the high melting point phase of bonding allo...

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Abstract

The invention relates to a metal / ceramic layered composite material inner heater. The metal / ceramic layered composite material inner heater comprises an outer casing pipe, thermal conductive alloy, a heating core, antioxidants, a press seal device and a suspension ring, and is characterized in that the outer casing pipe is made of multiple layers of materials and sequentially comprises a ceramic layer, an alloy bond layer and a metal layer in the direction from making contact with galvanizing zinc to being away from the galvanizing zinc; the ceramic layer and the metal layer are bonded together through the alloy bond layer; the alloy bond layer is Al-Ti-Cu-Si alloy which comprises, by mass, 5-10% of Ti, 3-8% of Cu, 9-14% of Si, and the balance Al; the outer casing pipe and the press seal device are connected through a flange and a sealing pad; the suspension ring is fixed on the press seal device; the upper end of the heating core is connected with the press seal device; the lower end of the heating core is arranged in the outer casing pipe; the heating core is composed of a U-shaped electric heating pipe; partition boards are evenly distributed on the part, in the outer casing pipe, of the heating core; the thermal conductive alloy is arranged in the outer casing pipe; the heating core is soaked in the thermal conductive alloy in the working process.

Description

technical field [0001] The invention relates to a heater, in particular to an inner heater of a metal / ceramic layered composite material. Background technique [0002] At present, most of the internal heaters used in industry are made of metal materials, and there are still corrosion problems for heating some highly corrosive substances. The patent (new application) with the application number of 2014106056655 discloses a liquid zinc corrosion resistant alloy inner heater. The outer sleeve of the inner heater is made of tungsten-molybdenum alloy. Technology cannot make large-scale outer casing more than one meter. In addition, the internal heater made of inorganic non-metallic materials such as quartz glass, silicon carbide, silicon nitride or graphite has the characteristics of high strength and high brittleness, and is only suitable for heating in specific substances or working environments. Small, high damage rate. Yang Wanli and others studied the preparation process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/42
Inventor 杜安乔腾波赵树鹏
Owner TIANJIN GONGDA GALVANIZING EQUIP CO LTD
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