Improved cooling system of bowl mill and improved cooling method

A cooling method and cooling system technology, which is applied in the direction of coolers, household refrigeration devices, lighting and heating equipment, etc., can solve the problems of unfavorable mixed material quality stability, reduced alloy performance, and large slurry viscosity, etc., to achieve process stability and Enhanced controllability, improved related performance quality, and the effect of preventing paraffin segregation

Inactive Publication Date: 2013-07-24
CHENGDU BANGPU CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the temperature of tap water cannot be kept constant, it is not conducive to the stability of the quality of the mixture between different batches.
[0006] The main disadvantages of the existing ball mill cooling method: the paraffin wax in the mixture is prone to melting and segregation, the particles are easy to agglomerate, the viscosity of the slurry is high, and it is difficult to unload and sieve; Difficult to control; easy to cause fouling during ball milling and reduce alloy properties

Method used

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  • Improved cooling system of bowl mill and improved cooling method
  • Improved cooling system of bowl mill and improved cooling method
  • Improved cooling system of bowl mill and improved cooling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Using circulating chilled water cooling method to prepare ball mill for multiple times with the same grade of mixture, record the relevant performance values ​​of different batches for comparison and calculate the average value. K10 brand prepared according to the ISO standard: the raw materials are mixed according to a certain proportion and then added to a rolling ball mill with cemented carbide as the grinding body (the purity of the raw materials is greater than 99.5%, and the average particle size is less than 1.5 μm), and the cooling water temperature is set at 8.6°C , the rotating speed of the ball mill is: 36 rpm, the ball-to-material ratio of the ball mill is 4:1, the ball mill medium is absolute ethanol, and the liquid-solid ratio is 250ml / kg. At the same time, 2% paraffin and 0.15% oleic acid are added to the total mass of raw materials. The cumulative ball milling time is: 48 hours. The slurry after ball milling to the point can pass through the 32...

Embodiment 2

[0024] Using the cooling method of circulating chilled water, the mixture of the same brand is prepared for ball milling for many times, and the average value of related properties is calculated. According to the ISO standard, the P30 brand is prepared, and the raw materials are mixed according to a certain proportion, and then added to the rolling ball mill with cemented carbide as the grinding body (the purity of the raw materials is greater than 99.5%, and the average particle size is less than 3.0μm), and the cooling water temperature is set at 9.3° C, the rotating speed of ball mill is: 36 revs / min, and the ball material ratio of ball mill is 4:1, and ball mill medium is dehydrated alcohol, and liquid-solid ratio is 280ml / kg. At the same time, 2% paraffin and 0.2% oleic acid were added to the total mass of raw materials. The cumulative ball milling time was 70 hours. After the ball milled to the point, the slurry was sieved through a 320-mesh sieve, and the statistical ave...

Embodiment 3

[0028]Using the cooling method of circulating chilled water, the mixture of the same brand was prepared for ball milling for many times, and the relevant performance values ​​of different batches were recorded for comparison and the average value was calculated. Cermet prepared according to the ISO standard: mix the raw materials in a certain proportion and add them to a rolling ball mill with cemented carbide as the grinding body (the purity of the raw materials is greater than 99.5%, and the average particle size is less than 1.5 μm), and the cooling water temperature is set at 11.2 °C, the speed of the ball mill is 36 rpm, the ball-to-material ratio of the ball mill is 4:1, the ball mill medium is absolute ethanol, and the liquid-solid ratio is 250ml / kg. At the same time, 2% paraffin and 2% oleic acid are added to the total mass of the raw materials. The cumulative ball milling time is: 96 hours. After the ball milling to the point, the slurry can pass through the 320 mesh s...

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Abstract

The invention discloses an improved cooling system of a bowl mill and an improved cooling method, wherein the cooling system comprises a bowl mill body and a water tank. A freezer system is connected between the bowl mill body and the water tank. A cooling water temperature of the freezer system is set at 8.6-11.2 DEG C, a rotating speed of the bowl mill is 36r/min, a ball-to-material ratio of ball milling is 4:1, a ball milling medium is absolute ethyl alcohol, a liquid-solid ratio is 250ml/kg-280ml/kg, simultaneously 2% of paraffin and 1.5%-2% of oleic acid by weight of the total mass of raw materials are added, and a cumulative ball milling time reaches 48-96h. The cooling system and the cooling method of the invention have beneficial technology effects of that: the cooling system and the cooling method can ensure the temperature of the ball milling cooling water lower and more stabile, thereby maintaining the temperature in a running ball mill at a relative stabile low temperature state, raising relative properties and quality of a mixture, providing better guarantee for preparing a high-quality mixture.

Description

technical field [0001] The invention relates to an improved cooling system and cooling method of a ball mill, and belongs to the technical field of cemented carbide mixture preparation technology and equipment. Background technique [0002] Cemented carbide is known as the tooth of modern industry. Due to its high strength, high hardness, high wear resistance and good chemical stability, it has a wide range of applications. With the wide application of cemented carbide in processing tools for electronic industry (such as micro-drills), processing tools for high-precision grinding centers and micro-engraving tools, cutting tools for mining and metal cutting tools, the quality requirements for them are increasing. higher. High-quality raw materials are one of the key conditions for producing high-quality cemented carbide. The quality of the mixture is directly related to the internal material and appearance quality of cemented carbide products. Even state-of-the-art equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/18F25D15/00
Inventor 李克林张洪
Owner CHENGDU BANGPU CUTTING TOOLS CO LTD
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