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A method for eliminating molybdenum dioxide dripping material

A molybdenum dioxide and molybdenum trioxide technology, applied in the direction of molybdenum oxide/molybdenum hydroxide, etc., can solve the problems of affecting the quality of molybdenum powder products, reducing the rate of first-class products, increasing water vapor, etc., and achieving the elimination of molybdenum dioxide. The effect of dripping water, improving the first-grade product rate and reducing the oversize

Active Publication Date: 2017-11-10
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the large amount of boat loading in the low-temperature furnace, the amount of water vapor itself is large. If the temperature of the circulating water is too high, the water vapor in the furnace tube will be further increased, and water droplets will enter the molybdenum dioxide (MoO 2 ) forming agglomeration
Dripping material not only increases the molybdenum dioxide sieve, but also affects the quality of subsequent molybdenum powder products, while reducing the first-grade product rate of the product

Method used

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  • A method for eliminating molybdenum dioxide dripping material
  • A method for eliminating molybdenum dioxide dripping material
  • A method for eliminating molybdenum dioxide dripping material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Select molybdenum trioxide (MoO 3 ) as the preparation raw material; the selected molybdenum trioxide (MoO 3 ) color is off-white, and the control index is: Fisher particle size is 9.2μm, bulk density is 1.52g / cm 3 , K content is 96ppm, other chemical components are uniform and qualified, and the morphology is relatively regular and non-agglomerated;

[0045] Choose molybdenum trioxide (MoO 3 ), first wrap the standpipe part of the hydrogen return pipeline with thermal insulation material, and the thickness of the thermal insulation material is 5cm; then fix it with a stainless steel screen, and fasten the edge of the screen with fine iron wire to facilitate the fixation; finally Then wrap a thin aluminum-plastic plate on the outside of the screen, and fix the interface of the aluminum-plastic plate with rivets; among them, the thermal insulation material is a high-aluminum ceramic fiber blanket produced by Shandong Luyang Co., Ltd., model LYGX-422; the stainless stee...

Embodiment 2

[0050] Select molybdenum trioxide (MoO 3 ) as the preparation raw material; the selected molybdenum trioxide (MoO 3 ) color is off-white, the control index is: Fibonacci particle size is 6μm, bulk density is 1.4g / cm 3 , K content is 92ppm, other chemical components are uniform and qualified, and the morphology is relatively regular and non-agglomerated;

[0051] Choose molybdenum trioxide (MoO 3 ), first use insulation material to wrap the standpipe of the hydrogen return pipeline, and the thickness of the insulation material is 4cm; then fix it with a stainless steel screen, and the edge of the screen should be fastened with fine iron wires to facilitate the fixation; finally; Then wrap a thin aluminum-plastic plate on the outside of the screen, and fix the interface of the aluminum-plastic plate with rivets; among them, the thermal insulation material is a high-aluminum ceramic fiber blanket produced by Shandong Luyang Co., Ltd., model LYGX-422; the stainless steel screen ...

Embodiment 3

[0056] Select molybdenum trioxide (MoO 3 ) as the preparation raw material; the selected molybdenum trioxide (MoO 3 ) color is off-white, and the control index is: Fisher particle size is 15μm, bulk density is 1.6g / cm 3 , K content is 130ppm, other chemical components are uniform and qualified, and the morphology is relatively regular and non-agglomerated;

[0057] Choose molybdenum trioxide (MoO 3 ), first wrap the standpipe of the hydrogen return pipeline with thermal insulation material, and the thickness of the thermal insulation material is 6cm; then fix it with a stainless steel screen, and the edge of the screen should be fastened with fine iron wire, so as to be fixed firmly; finally Then wrap a thin aluminum-plastic plate on the outside of the screen, and fix the interface of the aluminum-plastic plate with rivets; among them, the thermal insulation material is a high-aluminum ceramic fiber blanket produced by Shandong Luyang Co., Ltd., model LYGX-422; the stainless...

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Abstract

A method for eliminating molybdenum dioxide dripping material disclosed by the invention is specifically implemented according to the following methods: 1) select molybdenum trioxide as the raw material for preparation; The screen should be fixed, and the edges of the screen should be tied tightly with thin iron wires. Finally, a thin aluminum-plastic plate should be wrapped on the outside of the screen, and the interface of the aluminum-plastic plate should be fixed with rivets; Measure, then make a thermal insulation cap with a thin aluminum-plastic plate according to the measured size, and attach a layer of thermal insulation material layer on the inner wall of the thermal insulation cap, and finally put the prepared thermal insulation cap on the head of the hydrogen return pipeline; 4) pair the flat The five temperature zones in the four-tube low-temperature reduction furnace are adjusted respectively; 5) The selected molybdenum trioxide is placed in the adjusted flat four-tube low-temperature reduction furnace for inverse hydrogen reduction treatment, and finally molybdenum dioxide is obtained. The molybdenum dioxide obtained by the method of the invention is relatively loose, and at the same time, the molybdenum dioxide oversize is reduced.

Description

technical field [0001] The invention belongs to the technical field of molybdenum dioxide production technology, in particular to a method for eliminating molybdenum dioxide dripping material. Background technique [0002] At present, for the first-stage reduction of molybdenum dioxide in a flat-four-tube reduction furnace, all hydrogen is recovered, and the cooling end adopts natural cooling. The hydrogen recovery equipment in front of the flat-four-tube reduction furnace adopts a water seal. The branch plant conducts circulation, the temperature of circulating water is generally 40 ℃ ~ 60 ℃, and the maximum water temperature is about 65 ℃. However, the water vapor in the recovered gas cannot be cooled in time, which affects the drying capacity of the hydrogen recovery system. Due to the temperature difference, condensed water is formed at the mouth of the hydrogen return pipe. Under the action of the push boat cylinder, the thrust generates vibration and the water droplet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/02
CPCC01G39/02C01P2004/03
Inventor 刘秋萍安鹏飞牛鹏白阳张岁虎付小俊肖江涛曾毅王仙琴
Owner JINDUICHENG MOLYBDENUM CO LTD
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