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Composite manufacturing method of acid leaching stirrer

A manufacturing method and agitator technology, which are applied in metal material coating process, fusion spraying, coating, etc., can solve the problems of reduced service life, achieve the best corrosion resistance and erosion resistance, uniform structure, The effect of high hardness

Active Publication Date: 2019-07-19
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problem that the acid leaching stirring shaft and paddles are damaged by corrosion of chlorine and fluoride ions in the acidic system and abrasion of the ore pulp during the leaching process, resulting in reduced service life, the present invention proposes a composite manufacturing method of the stirring shaft and paddles, namely A layer of iron-based amorphous coating is deposited on the surface of carbon steel or stainless steel substrate by supersonic flame spraying technology, which combines the excellent mechanical properties of the substrate material with the high corrosion resistance and high wear resistance of the amorphous coating to form a composite Material stirring shaft and paddle

Method used

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  • Composite manufacturing method of acid leaching stirrer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A compound manufacturing method for acid leaching stirring shaft and blade, the steps are as follows:

[0027] (1) Select 45 steel as the base material, after quenching at 840±10℃×2h and then tempering at 600±10℃×2h, process a cylindrical stirring shaft with a length of 4.8m and a diameter of 0.17m;

[0028] (2) After alcohol degreasing and cleaning, use a special sandblasting machine to roughen the surface of the substrate with 20-40 mesh white corundum sand particles and a blasting pressure of 0.5MPa, with a roughness of Ra5;

[0029] (3) The chemical ratio (mass percentage) of iron-based amorphous powder is: chromium 18%, molybdenum 5%, tungsten 10%, niobium 12%, lutetium 2%, boron 4%, manganese 5%, carbon 2% , 3% silicon, 1% dysprosium, and the balance is iron.

[0030] (4) The supersonic flame spraying technique is used to prepare an amorphous coating on the surface of the pretreated substrate, and the average thickness of the coating is 150 μm. Spraying paramete...

Embodiment 2

[0033] A compound manufacturing method for acid leaching stirring shaft and blade, the steps are as follows:

[0034] (1) Select 304 steel as the base material, after quenching at 1000±10℃×2h and then tempering at 650±10℃×2h, it is processed into figure 1 The stirring blade shown;

[0035] (2) After alcohol degreasing and cleaning, use a special sandblasting machine to use 20-40 mesh white corundum sand particles and a blasting pressure of 0.5MPa to roughen the surface of the substrate with a roughness of Ra6;

[0036] (3) The chemical ratio (mass percentage) of iron-based amorphous powder is: chromium 18%, molybdenum 5%, tungsten 10%, niobium 12%, lutetium 2%, boron 4%, manganese 5%, carbon 2% , 3% silicon, 1% dysprosium, and the balance is iron.

[0037] (4) The supersonic flame spraying technique is used to prepare an amorphous coating on the surface of the pretreated substrate, and the average thickness of the coating is 150 μm. Spraying parameters are: kerosene flow ra...

Embodiment 3

[0040] (1) Select 45 steel as the base material, after quenching at 840±10℃×2h and then tempering at 600±10℃×2h, process a cylindrical stirring shaft with a length of 4.8m and a diameter of 0.17m;

[0041] (2) After alcohol degreasing and cleaning, use a special sandblasting machine to roughen the surface of the substrate with 20-40 mesh white corundum sand particles and a blasting pressure of 0.5MPa, with a roughness of Ra5;

[0042] (3) The formula of iron-based amorphous mass percentage is: chromium 18%, molybdenum 5%, tungsten 10%, boron 4%, manganese 5%, carbon 2%, silicon 3%, dysprosium 1%, and the balance is iron. (not adding niobium, lutetium) all the other are the same as embodiment 1.

[0043] (4) The supersonic flame spraying technique was used to prepare an amorphous coating on the surface of the pretreated substrate (the spraying process was the same as in Example 1), and the average thickness of the coating was 150 μm. Spraying parameters are: kerosene flow rate...

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Abstract

The invention relates to a composite manufacturing method of an acid leaching stirrer. Iron-based amorphous powder is taken as a spraying material, the supersonic flame spraying technology is adoptedto accelerate the heating of the powder, and an iron-based amorphous coating with the thickness of 150-250 [mu]m is prepared on the surface of a stirring shaft or a paddle. The iron-based amorphous powder is prepared from the following components in percentage by mass: 0-25% of chromium, 0-10% of molybdenum, 0-5% of tungsten, 0-12% of niobium, 0-4% of lutetium, 0-7% of manganese, 0-5% of boron, 0-4% of carbon, 0-3% of silicon, 0-2% of rare earth element and the balance of iron. The service life of the prepared composite material stirring shaft and paddle is several times longer than that of traditional stainless steel products.

Description

technical field [0001] The invention relates to a compound manufacturing method for depositing an amorphous coating on the surface of an acid leaching stirring shaft and a paddle blade by using a supersonic flame spraying technology, and belongs to the field of material surface engineering. Background technique [0002] At present, hydrocopper-lead-zinc smelting is the most important smelting method in the world, and its output accounts for more than 80% of the total output. In order to completely dissolve, separate and remove copper, lead and zinc, and at the same time fully enrich and recover valuable metals such as cadmium, cobalt, and nickel, stirring plays an important role. Therefore, the agitator becomes the key point to realize the above functions equipment. [0003] The stirrer consists of two parts: a stirring paddle and a stirring shaft. Since hydrometallurgy basically achieves solid-liquid mixing, dissolution, and impurity removal in a high-acid, high-corrosion...

Claims

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Application Information

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IPC IPC(8): C23C4/129C22C45/02C23C4/067
CPCC22C45/02C23C4/067C23C4/129
Inventor 张林伟周玉林王日昕余玖明郝长夷王佳伟杨学兵曾卫军
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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