In-situ synthesizing and compounding method of desilting tip

Abstract

The invention relates to an in-situ synthesizing and compounding method of a desilting tip. In the compounding method, titanium wires are weaved into a titanium wire net to be rolled or stacked into a plurality of layers, and a net-shaped three-dimensional framework structure is manufactured in accordance with the shape of the desilting tip; a casting mould is manufactured according to requirements of a casting technology, and the titanium wire three-dimensional net-shaped framework is preset in the cavity of the casting mould; cast iron is smelted to obtain molten cast iron to be poured into the casting mould; the molten cast iron fills the gaps of the net-shaped three-dimensional framework, and the titanium wire net-shaped three-dimensional framework is obtained after cooling and cleaning and is fixed on a titanium wire-cast iron binary material preform in a metal substrate; and the titanium wire-cast iron binary material prefabricated body is arranged in a thermal treatment furnace and heated to a temperature of forming carbides for preserving the temperature, titanium carbide granules with high micro-hardness are prepared to obtain a compounding desilting tip with a titanium carbide granule reinforced cast iron base. The in-situ synthesizing and compounding method of the desilting tip fully develops high wear-resisting property of a titanium carbide hard phase and good toughness of the cast iron, has the advantages of convenient regulation and control and reliable technology and can be widely applied to the field of mine mining and beneficiation.

Description

technical field [0001] The invention belongs to the technical field of mine mining and dressing equipment manufacturing, in particular to an in-situ synthesis and composite method of sand sinking nozzles. Background technique [0002] When the cyclone for classification and separation in the field of mine flotation is in operation, the solid-liquid two-phase flow makes a strong rotational movement. Due to the large size of the sinking ore material, there is a severe impact on the sedimentation nozzle at the bottom of the cyclone. Abrasion effect. This will not only shorten the service life of the sand sinking nozzle, increase the number of shutdowns for maintenance, and affect the continuous operation of the production line, but also change the bottom flow due to changes in the size of key parts, thereby deteriorating the operating effect. Therefore, the sand sinking nozzle at the bottom of the cyclone has high requirements on wear resistance and impact resistance, and high...

AI Technical Summary

Problems solved by technology

Alloy cast iron lined cyclone has poor wear resistance and short service life

The ceramic-lined cyclone is light in weight and has good abrasiveness. However, since ceramics are brittle materials, they are easily broken and scrapped due to impact during transportation, installation, and use. In the case of being impacted by large-sized materials during operation In this case, the ceramic lining will be broken and block the cyclone. In addition, the ceramic lining needs to be sintered at high temperature, the production process is complicated, and the quality is unstable.

Polyurethane lining has been used in recent years due to its light weight, good formability, high corrosion resistance and wear resistance. When there are large particles with sharp edges and corners in the material, due to the high velocity of the solid-liquid two-phase flow, they will be subjected to high stress impacts, which will easily cause the deformation of the polyurethane lining, or even tear it into pieces, which not only affects the classification and separation of the cyclone effect, and in severe cases, debris can also clog the cyclone, causing production stoppage

To sum up, the materials currently seen cannot meet the comprehensive performance requirements of the sand sinking nozzle in terms of strength, toughness, wear resistance, etc. It is necessary to develop new composite materials to produce composite sand sinking nozzles to meet the requirements of the mineral processing industry. The actual demand for the production of sand spit

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