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Molybdenum acid washing process

A process, molybdic acid technology, applied in the field of molybdenum pickling process, it can solve the problem that more than 100 kWh of electricity is required per hour, the temperature must rise to 400-500 degrees to wash, the surface quality is unstable, and the melting alkali is time-consuming and electricity-consuming, etc. problem, to achieve the effect of low cost, good cleaning effect and smooth cleaning surface

Inactive Publication Date: 2021-07-16
李敏密
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Disadvantages of the alkaline cleaning method: the power consumption is particularly large, the work efficiency is low, the surface quality is unstable, and it is good and bad
At present, all enterprises use alkali washing to remove the scale of molybdenum products. The molten alkali takes time and electricity. It takes more than ten hours to melt, and it takes more than 100 degrees of electricity per hour. Low, time-consuming and labor-intensive, each product needs to be washed several times to be basically clean

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A kind of molybdenum pickling process, specifically comprises the following steps:

[0012] 1) Weigh raw materials according to weight percentage: sulfuric acid: 85%, nitric acid: 9.8%, hydrochloric acid: 5%, rhodine: 0.2%;

[0013] 2) First add sulfuric acid to the acid tank, then add nitric acid, then add hydrochloric acid, and finally add rhodin, start to heat up with electricity, and use different temperatures according to materials of different thicknesses. For molybdenum sheet, wash at 80°C to 90°C for thick molybdenum sheet with a thickness greater than 10mm. Washing time: 1 minute for thin material and 5 minutes for thick material.

Embodiment 2

[0015] A kind of molybdenum pickling process, specifically comprises the following steps:

[0016] 1) Weigh raw materials according to weight percentage: sulfuric acid: 92.9%, nitric acid: 5%, hydrochloric acid: 2%, rhodine: 0.1%;

[0017] 2) First add sulfuric acid to the acid tank, then add nitric acid, then add hydrochloric acid, and finally add rhodin, start to heat up with electricity, and use different temperatures according to materials of different thicknesses. For molybdenum sheet, wash at 80°C to 90°C for thick molybdenum sheet with a thickness greater than 10mm. Washing time: 1 minute for thin material and 5 minutes for thick material.

Embodiment 3

[0019] A kind of molybdenum pickling process, specifically comprises the following steps:

[0020] 1) Weigh raw materials according to weight percentage: sulfuric acid: 89%, nitric acid: 7.5%, hydrochloric acid: 3.4%, rhodine: 0.1%;

[0021] 2) First add sulfuric acid to the acid tank, then add nitric acid, then add hydrochloric acid, and finally add rhodin, start to heat up with electricity, and use different temperatures according to materials of different thicknesses. For molybdenum sheet, wash at 80°C to 90°C for thick molybdenum sheet with a thickness greater than 10mm. Washing time: 1 minute for thin material and 5 minutes for thick material.

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PUM

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Abstract

The invention relates to a molybdenum acid washing process. The molybdenum acid washing process specifically comprises the following steps that (1) the following raw materials are weighed in percentage by weight: 85%-92.9% of sulfuric acid, 5%-10% of nitric acid, 2%-5% of hydrochloric acid and 0.1%-0.2% of rodine; and (2) sulfuric acid is added into an acid tank, then nitric acid, hydrochloric acid and rodine are added, energization and temperature rise are started, different temperatures are adopted according to materials with different thicknesses, thin molybdenum sheets with the thickness smaller than 10 mm are washed when the temperature rises to 50 DEG C to 60 DEG C, thick molybdenum sheets with the thickness larger than 10 mm are washed at 80 DEG C to 90 DEG C, and the material washing time is 1 minute for the thin molybdenum sheets and 5 minutes for the thick molybdenum sheets. The molybdenum acid washing process has the advantages of reasonable raw material ratio, high acid liquor practicability, capability of acid washing of molybdenum products, good cleaning effect, smooth cleaning surface, low cost, high efficiency, good quality, time saving and labor saving.

Description

technical field [0001] The invention relates to a molybdenum pickling process. Background technique [0002] There are more and more molybdenum products in China, which are widely used in a wide range of fields. There are hundreds of millions of tons of molybdenum products in China every year. Molybdenum oxidizes during processing to form molybdenum trioxide and molybdenum dioxide. Molybdenum will also oxidize after being left for a period of time. Alkaline washing has always been used to remove the scale on the surface of molybdenum products. [0003] Disadvantages of the alkaline cleaning method: the power consumption is particularly large, the work efficiency is low, the surface quality is unstable, and it is good and bad. At present, all enterprises use alkali washing to remove the scale of molybdenum products. The molten alkali takes time and electricity. It takes more than ten hours to melt, and it takes more than 100 degrees of electricity per hour, and the tempera...

Claims

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Application Information

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IPC IPC(8): C23G1/10
CPCC23G1/106
Inventor 李敏密
Owner 李敏密