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Dewaxing and pre-burning furnace waste gas treatment method

A technology for waste gas treatment and pre-sintering, which is applied in the field of powder metallurgy and can solve the problem that the gaseous forming agent cannot be completely recovered.

Active Publication Date: 2019-09-17
ZUNYI ZHONGBO CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for treating waste gas from a dewaxing pre-burning furnace to solve the problem that the gaseous forming agent cannot be completely recovered

Method used

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  • Dewaxing and pre-burning furnace waste gas treatment method

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Embodiment Construction

[0027] The present invention will be described in further detail below by means of specific embodiments:

[0028] The reference signs in the drawings of the description include: the first cooling pipe 1, the first heat exchange pipe 2, the gas storage tank 3, the first recovery pipe 4, the collection tank 5, the liquid outlet 6, the float 7, the first support rod 8. The second support rod 9 , the first plunger 10 , the second plunger 11 , the second cooling pipe 12 , the second heat exchange pipe 13 , the second recovery pipe 14 , and the air outlet pipe 15 .

[0029] In this embodiment, the dewaxing pre-burner waste gas treatment method comprises the following steps:

[0030] Step 1: Pass the waste gas into the first cooling pipe 1 . Such as figure 1 As shown, the first cooling pipe 1 is in a spiral shape, the first cooling pipe 1 is provided with a first heat exchange pipe 2 , and the first cooling pipe 1 is wound on the first heat exchange pipe 2 . Tap water is passed in...

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Abstract

The invention belongs to the technical field of powder metallurgy and particularly discloses a waste gas treatment method for a dewaxing presintering furnace. The waste gas treatment method comprisesthe following steps that 1, waste gas is subjected to heat exchange and cooling treatment through tap water, and evaporated water vapor is collected; 2, forming agents cooled to be in a liquid state are recovered; 3, the rest of waste gas is subjected to heat exchange and cooling treatment through air; 4, the heat-exchanged air is collected, the air pressure is 0.1-0.8 MPa, the air temperature is80-120 DEG C, and the air flow is 0.1-0.3 times of the water vapor flow; 5, the collected water vapor and the air are mixed and injected into the waste gas; and 6, the rest of the forming agents cooled to be in the liquid state are collected and subjected to high-temperature dehydration. The waste gas treatment method for the dewaxing presintering furnace aims at solving the problem that the gas-state forming agents cannot be completely recovered.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and specifically discloses a method for treating waste gas of a dewaxing pre-burning furnace. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. It has a series of properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. Excellent properties, especially its high hardness and wear resistance, remain basically unchanged even at a temperature of 500°C, and still have high hardness at 1000°C. [0003] The production process of cemented carbide includes pre-sintering stage, solid phase sintering stage, liquid phase sintering stage and cooling stage. Among them, a large amount of waste gas will be generated during the pre-burning stage. The waste gas includes the gasified molding agent and the carbon-containing gas genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/12B01D53/00
Inventor 嵇建斌胡筱胡光强赵伟
Owner ZUNYI ZHONGBO CEMENTED CARBIDE