Ball grinder accurate ball loading method

A technology of precise ball filling and ball milling, applied in grain processing, etc., can solve the problems of large errors and inconvenience, and achieve the effect of improving concentrate grade, reducing power consumption, and simple method

Inactive Publication Date: 2006-10-11
KUNMING UNIV OF SCI & TECH +2
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is inconvenient to use these two empirical ball diameter formulas to calculate the ball diameter of the mill in my country's mineral processing plant, and the second is that the error is still relatively large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ball grinder accurate ball loading method
  • Ball grinder accurate ball loading method
  • Ball grinder accurate ball loading method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1. A copper-nickel concentrator in Yunnan, with a scale of 300 tons per day, used two grid-type ball mills with a diameter×length of 1.5×3.0 meters to conduct one-stage grinding in two series. The filling of balls in production is unreasonable, and the diameter of the balls is too large, resulting in insufficient fineness of grinding products, low sorting index, and high ball consumption. Carry out precise installation and replacement of balls in the mill of this factory, the specific procedure is as follows:

[0040] (1) Measure the uniaxial compressive strength of ore standard mechanical test piece σ=502.9kg / cm with the lump ore sample of the plant 2 , the compressive strength σ of the irregular ore block 0 =206.1kg / cm 2 , ore elastic modulus 7.36×10 5 kg / cm 2 , Poisson's ratio 0.341. The mechanical properties of the ore show that the ore is a soft ore (f=5.03), which has certain toughness and deformability. When grinding this kind of ore, both impact and...

Embodiment 2

[0053] Embodiment 2. A copper beneficiation plant in Yunnan, with a scale of 3000 tons per day, adopts two large ball mills with a diameter × length of 3.6 × 4.5 meters in parallel for one-stage grinding. The filling of balls in the production is unreasonable, and the diameter of the balls is seriously too large, resulting in low mill capacity, low grinding fineness, and low sorting index. For this purpose, the factory organizes to meet production and standard problems, and adopts the method of precise loading and filling balls to improve the grinding effect. The specific procedures are as follows:

[0054] (1) Determine the mechanical properties of the ore for the ore in the plant: the uniaxial compressive strength of the standard mechanical test piece σ = 871.775kg / cm 2 , the compressive strength σ of the irregular ore block 0 =398.75kg / cm 2 , Poisson's ratio μ=0.28. The mechanical properties of the ore show that the ore is a medium-hard ore (f=8.7), with moderate brittle...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for accurately loading and replenishing balls in a ball mill, which belongs to the technical field of ore crushing and fine grinding. According to the purpose of ore grinding, this accurate and convenient method of filling balls is proposed, including: measuring the mechanical parameters of the ore to be ground; screening and analyzing the new feed ore and sand return of the mill, and calculating the full feed The ore particle size is composed and grouped; the ball diameter value required by each group of ore particles is calculated using the ball diameter semi-theoretical formula; the ball ratio of the balls initially loaded in the mill is determined according to the ore particles of each group and the required ball diameter to be ground; Draw the positive cumulative characteristic curve of the particle size of the ball charge, and then obtain the ball diameter and the proportion of the ball to be added accurately from the graph. Applying this method to replenish balls, due to the precise ball diameter, reasonable proportion and simple method, increases the output per hour of the mill, improves the quality of the grinding product, reduces the power consumption of the ball, and increases the dissociation degree of the grinding product monomer. The beneficiation recovery rate and concentrate grade have also been improved.

Description

[0001] 1. Technical field: ore crushing and grinding technical field 2. Background technology [0002] The grinding process of the ball mill is one of the most complicated operations in the mineral processing plant. There are many variable influencing factors and are intricate, making it difficult to solve many problems in the grinding process. The determination of the ball diameter is difficult to be precise, and the existing ball diameter formulas are all empirical formulas, and the error of the calculated ball diameter is large. There is no good way for the proportioning of various size balls. Therefore, it is difficult to achieve precision in both the single-level ball diameter and the average diameter of the overall ball load in the mill, and it is also difficult to obtain a good grinding effect. [0003] Mineral dressing circles both at home and abroad attach great importance to the research on the method of loading balls in ball mills. A lot of research has been done ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/00
Inventor 段希祥周平赵高举王春
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap