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Preparation method for slurry pump impeller

A technology for slurry pumps and impellers, which is applied to pumps, parts of pumping devices for elastic fluids, pump components, etc., can solve problems such as corrosion, insufficient strength, etc., to prolong service life, improve bonding rate, and improve The effect of strength and toughness

Active Publication Date: 2018-10-12
ANHUI SANHUAN PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art, the purpose of the present invention is to provide a preparation method of a slurry pump impeller, which overcomes the disadvantages of insufficient strength and easy corrosion of the existing slurry pump impeller, prolongs the service life of the slurry pump impeller, and improves Slurry pump impeller replacement cycle

Method used

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Examples

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preparation example Construction

[0025] The invention provides a preparation method of a slurry pump impeller, comprising the following steps:

[0026] (1) Ingredients are prepared according to the following formula: 25% of returned charge, 15% of high-carbon ferrochrome, 15% of low-carbon ferrochrome, 40% of scrap steel, and 5% of pig iron;

[0027] Put the above raw materials into the induction furnace for smelting, after the furnace materials are melted, take samples for testing, adjust the molten iron to the required composition according to the testing results, raise the temperature of the molten iron to 1480-1500 ° C, then add ferromanganese and ferrosilicon for deoxidation, Slag, finally add ferro-titanium, ferro-vanadium, rare earth for modification treatment, and use aluminum for final deoxidation;

[0028] (2) Use resin to make sand molds, place cold iron at the tongue of the sheath wood mold, and fill sand for molding; after the mold is finished, the mold is painted with zircon powder alcohol paint...

Embodiment 1

[0049] A kind of slurry pump impeller, its preparation method comprises the following steps:

[0050] (1) Ingredients are prepared according to the following formula: 25% of returned charge, 15% of high-carbon ferrochrome, 15% of low-carbon ferrochrome, 40% of scrap steel, and 5% of pig iron;

[0051] Add the above raw materials into the induction furnace for smelting, after the furnace material is melted, take samples and test, adjust the molten iron to the required composition according to the test results, raise the temperature of the molten iron to 1480 ° C, then add ferromanganese and ferrosilicon for deoxidation, slag removal, Finally, ferro-titanium, ferro-vanadium, and rare earth are added for modification, and aluminum is used for final deoxidation;

[0052] (2) Use resin to make sand molds, place cold iron at the tongue of the sheath wood mold, and fill sand for molding; after the mold is finished, the mold is painted with zircon powder alcohol paint, cored, and boxe...

Embodiment 2

[0064] A kind of slurry pump impeller, its preparation method comprises the following steps:

[0065] (1) Ingredients are prepared according to the following formula: 25% of returned charge, 15% of high-carbon ferrochrome, 15% of low-carbon ferrochrome, 40% of scrap steel, and 5% of pig iron;

[0066] Add the above raw materials into the induction furnace for smelting, after the furnace material is melted, take samples and test, adjust the molten iron to the required composition according to the test results, raise the temperature of the molten iron to 1480 ° C, then add ferromanganese and ferrosilicon for deoxidation, slag removal, Finally, ferro-titanium, ferro-vanadium, and rare earth are added for modification, and aluminum is used for final deoxidation;

[0067] (2) Use resin to make sand molds, place cold iron at the tongue of the sheath wood mold, and fill sand for molding; after the mold is finished, the mold is painted with zircon powder alcohol paint, cored, and boxe...

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Abstract

The invention belongs to the technical field of slurry pumps, and particularly relates to a preparation method for a slurry pump impeller. The preparation method comprises the steps that (1) burdeningand smelting are conducted; (2) sand mold making through resin; (3) casting is conducted; (4) a quenching and tempering treatment technique is adopted; (5) slurry for forming an anti-corrosion layeris brushed on the surface of the impeller after the impeller is formed, and drying treatment is conducted; and (6) the surface of the impeller is subjected to calcining treatment through mixed gas ofhydrogen and methane, calcining time is 10-15 s, and the slurry pump impeller is obtained. The surface of the slurry pump impeller is brushed in a micron-scale aluminum oxide and nano-scale aluminum oxide composite mode, and the compactness of particle packing in the anti-corrosion layer surface is ensured through the large-particle and small-particle aluminum oxide; and through high-temperature calcining of the mixed gas of hydrogen and methane, the combination state of a packing particle interface of the anti-corrosion layer surface is improved, the corrosion resistance and impact strength of the slurry pump impeller is ensured, and the service life of the slurry pump impeller is prolonged.

Description

technical field [0001] The invention belongs to the technical field of slurry pumps, and in particular relates to a preparation method of an impeller of a slurry pump. Background technique [0002] A slurry pump usually refers to a machine that increases the energy of a solid-liquid mixed medium through the rotation of the impeller of the pump. It is mainly used in mines, power plants, dredging, metallurgy, chemicals, building materials and petroleum industries. The operating principle of the slurry pump is that under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and gains energy, leaving the edge of the impeller at high speed and entering the volute pump casing. In the volute pump casing, the liquid decelerates due to the gradual expansion of the flow channel, and converts part of the kinetic energy into static pressure energy, and finally flows into the discharge pipe at a higher pressure and is sent to the required...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C9/28B22C9/02B22D27/18C21B11/10F04D29/22F04D29/02
CPCB22C3/00B22C9/02B22C9/28B22D27/18C21B11/10F04D29/026F04D29/2294Y02P10/143Y02P10/20
Inventor 杨小民
Owner ANHUI SANHUAN PUMP
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