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steel ball in the use of some of the reasons

steel ball in the use of some of the reasons for the loss of analysis and solutions

steel ball In the process of the emergence of a round situation, our company immediately organize technology, quality control and related experts to the scene view, and bring back your company out of the round ball ball check back to the factory composition, hardness, mirror and low times System analysis, analysis of the reasons as follows:

1, the analysis of the causes of steel ball out of round

(1) chemical composition analysis: Each batch of our production and factory have a rigorous testing process, after the return of the steel ball chemical composition and image analysis, the results of which five steel ball does not meet the chemical composition of our products Range requirements, confirmed that non-my company's products. And analyze it at a low magnification. The analysis results show that the center is loose and there are many inclusions. After the comparison of the spectra is above grade 3,

(2) Hardness distribution: Through the testing of our steel ball hardness distribution. Steel ball surface hardness is high, and easy to slide the ball when matching with the impact of the ball hit the ball probability of ball hit, so the next step is recommended to use the hardness of about 50HRC steel ball is appropriate;

(3) surface defects: surface defects can also lead to some steel ball circle phenomenon. All the finished steel balls of our company have strict pumping tests in the production process and before storage, which are in line with the industry standard deviation, there is no surface defects;

(4) The impact of working conditions: Through observation in the field, ore feed size is large, is a limonite, magnetic, high hardness f = 17-20; critical speed and grading on the hit the ball and the ball hit the ball probability Larger; spit out the steel ball mill and ore large volume, spit out through the gap when the gap caused by impacted steel ball deformation or broken; according to mill diameter and finished fineness analysis of steel ball used in diameter wear to 40mm or less All belong to the useless, but in the mill will affect the stand-alone capacity and unit consumption; (Useless steel ball did not remove the equipment, resulting in a vicious circle within the mill; mill temperature and the outside temperature gap, hot and cold reflect easy to crack , Out of the block caused by the loss of steel ball ball) This is the mill found steel ball diameter less than 40-50mm below the main reason for the loss of more than normal loss.

2, conclusion:

Through careful testing and field analysis, forging the biggest advantage of steel ball is not broken, without losing the circle, can cause this phenomenon because:

① material selection;

② the impact of working conditions;

③ different materials mixed steel ball.

Mainly the choice of materials and working conditions and steel ball mixed caused.

3, solution:

① We adjust the chemical composition based on the original material;

② hope your company to consider whether the process can be adjusted, the best spit out of the steel ball can be selected and then used in the ball mill.

After making the above adjustments, the situation in all aspects may be better.

• Ore hardness and wear-resistant steel ball hardness of a reasonable match
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