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Ceramic-metal composite liner plate for large semi-autogenous mill and casting method of ceramic-metal composite liner plate

A metal composite and semi-autogenous grinding machine technology, applied in the field of mechanical parts manufacturing, can solve the problems of low hardness, poor wear resistance, short service life, etc., to improve density, facilitate exhaust and feeding, and prevent blowback and splash effect

Active Publication Date: 2016-04-13
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its hardness is low, its wear resistance is poor, and its service life is short

Method used

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  • Ceramic-metal composite liner plate for large semi-autogenous mill and casting method of ceramic-metal composite liner plate
  • Ceramic-metal composite liner plate for large semi-autogenous mill and casting method of ceramic-metal composite liner plate
  • Ceramic-metal composite liner plate for large semi-autogenous mill and casting method of ceramic-metal composite liner plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A ceramic-metal composite liner for a large semi-autogenous mill. A ceramic composite layer is arranged on a metal substrate. The chemical composition of the metal substrate and the weight percentages of each component are: C: 0.6%, Mn: 1.0%, Si: 1.0%, Cr: 2.2%, Mo: 0.8%, Ni: 1.0%, Cu: 0.15%, La: 0.01%, P2 o 3 Powder, 4% borax and 4% phenolic resin, the trough thickness of the liner is 160mm, and the weight is 1650kg.

[0032]The casting method of the ceramic-metal composite liner for a large semi-autogenous mill includes a casting process and a heat treatment process:

[0033] (1) Casting process

[0034] The process adopts the lost foam negative pressure casting process, including the following steps:

[0035] Making the liner model: First, prepare the matrix model with EPS and pre-open multiple dovetail grooves on its upper surface, place it in the mold frame after drying, and then, according to the weight percentage, use mechanical powder mixing equipment to mix 2...

Embodiment 2

[0042] A ceramic-metal composite liner for a large semi-autogenous mill. A ceramic composite layer is arranged on a metal substrate. The chemical composition of the metal substrate and the weight percentages of each component are: C: 0.55%, Mn: 1.2%, Si: 0.9%, Cr: 2.0%, Mo: 0.7%, Ni: 0.7%, Cu: 0.1%, La: 0.02%, P2 o 3 Powder, 6% borax and 4% phenolic resin, the trough thickness of the liner is 165mm, and the weight is 1760kg.

[0043] The casting method of the ceramic-metal composite liner for a large semi-autogenous mill includes a casting process and a heat treatment process:

[0044] (1) Casting process

[0045] The process adopts the lost foam negative pressure casting process, including the following steps:

[0046] Making the liner model: first, prepare the matrix model with EPS and pre-open multiple dovetail grooves on its upper surface, place it in the mold frame after drying, and then, according to the weight percentage, use mechanical powder mixing equipment to mix ...

Embodiment 3

[0053] A ceramic-metal composite liner for a large semi-autogenous mill. A ceramic composite layer is arranged on a metal substrate. The chemical composition of the metal substrate and the weight percentages of each component are: C: 0.65%, Mn: 0.8%, Si: 0.7%, Cr: 2.5%, Mo: 0.6%, Ni: 0.8%, Cu: 0.2%, La: 0.02%, P2 o 3 Powder, 5% borax and 4% phenolic resin, the trough thickness of the liner is 150mm, and the weight is 1580kg.

[0054] The casting method of the ceramic-metal composite liner for a large semi-autogenous mill includes a casting process and a heat treatment process:

[0055] (1) Casting process

[0056] The process adopts the lost foam negative pressure casting process, including the following steps:

[0057] Making the liner model: first, prepare the matrix model with EPS and pre-open multiple dovetail grooves on its upper surface, place it in the mold frame after drying, and then, according to the weight percentage, use mechanical powder mixing equipment to mix ...

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Abstract

The invention provides a ceramic-metal composite liner plate for a large semi-autogenous mill and a casting method of the ceramic-metal composite liner plate. The liner plate is formed by arranging a ceramic composite layer on a metal matrix. A trace amount of molybdenum powder and a trace amount of nickel powder are added to the ceramic composite layer to improve the toughness of the ceramic composite layer, a trace amount of La2O3 powder is added to refine crystal particles of the ceramic composite layer, and the bonding strength of the ceramic composite layer and the metal matrix is improved. The casting method includes the casting technology process and the thermal treatment technology process. In the casting technology process, the ceramic composite layer and the metal matrix are metallurgically bound through negative pressure casting of an evanescent mode, and after pouring is completed, a casting is cooled by maintaining the vacuum degree of a sand box and horizontal two-dimensional vibration of a workbench of the sand box. The wave trough thickness of the manufactured ceramic-metal composite liner plate for the large semi-autogenous mill is larger than 140 mm, and the weight is 1.5 tons or above; the hardness of the ceramic composite layer is HBW600 or above, and the hardness of the metal matrix is larger than HRC40; the impact toughness is larger than or equal to 40 J / cm<2>, and the yield strength is larger than 1,100 MPa; and the beneficial effects of being resistant to shock, flowing deformation and abrasion are achieved.

Description

technical field [0001] The invention belongs to the technical field of mechanical parts manufacturing, and in particular relates to a ceramic-metal composite liner for a large semi-autogenous mill and a casting method thereof. Background technique [0002] Mills are commonly used grinding equipment in metallurgical mines, building materials, power generation and other industries. The semi-autogenous mill uses grinding balls and materials as the medium, and the grinding balls and materials are lifted to a certain height by the rotation of the cylinder, and then thrown down to produce strong impact, grinding and grinding to grind the ore. Grinding balls and ore produce strong impact and friction on the wall of the mill, and the liner is an important part in the mill to protect the mill and drive the grinding balls to grind and crush materials. The working environment of the ball mill liner is harsh, and the main failure modes of the semi-autogenous mill liner with a diameter ...

Claims

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Application Information

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IPC IPC(8): C22C38/18C22C38/04C22C38/02C22C38/12C22C38/08C22C38/16B22C9/04B22D19/16C22C30/00C22C32/00B02C17/22
CPCB02C17/22B22C9/04B22D19/16C22C30/00C22C32/0005C22C38/005C22C38/02C22C38/04C22C38/08C22C38/12C22C38/16C22C38/18
Inventor 谢敬佩梁婷婷郭惠丹吕世敬马窦琴王爱琴王文焱李继文李洛利
Owner HENAN UNIV OF SCI & TECH
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