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The method of accurate loading-and-filling ball of two sections of milling mine

A technology of precise ball filling and two-stage grinding, which is applied in grain processing and other directions, can solve the problems of extensive methods and poor effects, and achieve the effects of good product particle size characteristics, wide application range and remarkable effect

Inactive Publication Date: 2007-09-19
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To replace the experience ball filling method which is extensive and ineffective in the current production

Method used

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  • The method of accurate loading-and-filling ball of two sections of milling mine
  • The method of accurate loading-and-filling ball of two sections of milling mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1. Yunnan Daya Nonferrous Metals Company Shizishan Copper Mine Concentrator, the original production scale is 1850 tons / day. The beneficiation plant adopts three sections and one closed-circuit crushing, and the crushing particle size is ≤12mm. The concentrator is a two-stage grinding process, the first stage of the mill is a 3.2×3.1 meter grid ball mill, and the second stage of the mill is a 3.2×3.1 meter overflow ball mill. Due to the unreasonable loading of balls in the two-stage grinding of the dressing plant, the productivity of the mill is only 76.5 tons / hour, and the final fineness of the product -0.074mm reaches 74%. The applicant implements precise loading and ball replenishment for the two-stage grinding of the Shizishan Copper Mine Concentrator. The specific steps are as follows:

[0041] (1) The first stage of the two-stage grinding is realized according to the following steps

[0042] ① The measured uniaxial compressive strength of the ore σ = ...

Embodiment example 2

[0064] Implementation case 2. Series II of Dahongshan Copper Mine Concentrator of Yunnan Yuxi Mining Co., Ltd. The design scale is 1,200 tons per day. The concentrator has three stages of closed-circuit crushing, and the final particle size of crushing is 16mm. The grinding process adopts two stages of grinding. , Grinding particle size requirement -0.074mm up to 70%. Due to the unreasonable loading of balls during production, the productivity of the grinding system is 70 tons / hour. The procedure for implementing precision ball replenishment on the II series is as follows:

[0065] (1) The procedure for implementing precise ball replacement on the first stage of the mill:

[0066] ①Measured ore uniaxial compressive strength σ=871.775kg / cm 2 , the compressive strength σ of irregular ore blocks 0 =398.75kg / cm 2 , Poisson's ratio μ = 0.28, the ore is medium hard and soft, and the toughness is medium.

[0067] ②Sieve and analyze the new feed ore of the first stage of grindin...

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Abstract

The invention relates to a precise remedy method for two sections of grind, belonging to the ore crash, the mill technical field in the method of preparation. The newly feeding ore with the largest size 25-15 mm is ground to the size smaller than 0.15 mm for two sections, wherein the size smaller than 0.074 mm reaches 70 wt% or thinner product fineness. According to the requirement, the precise makeup remedy method in two sections of grinding suggested in the invention mills the newly feeding mineral grain to the largest size 2-3 mm, wherein the size smaller than 0.074 mm is 20-30wt%, in the second grinding, the size is then ground to smaller than 0.15 mm, wherein the size smaller than 0.074 reaches beyond 70%, to replace the experience remedy method with rude and bad effect in the existing production. The invention not only used in the two section grinding circuit, but also is fit for the three-section grinding circuit, which has good product size characteristic, high sizing index, and can be applied in the grinding technology of the different ore rigidity, different mill specification, different rotating speed mill and different character of ore.

Description

[0001] 1. Technical field: the ore crushing and grinding technical field in the mineral processing method. 2. Background technology [0002] Mineral dressing is to process the raw ore extracted from the mine, enrich useful minerals and discard useless gangues. The enriched useful minerals are called concentrates for metal smelting, and gangues are discarded as tailings. In mineral processing, crushing and grinding ore is the leading process and the prerequisite for mineral separation. Crushing and grinding the ore is to dissociate various minerals in the ore, and then use various beneficiation methods to select useful minerals and discard the tailings. Therefore, ore crushing and grinding is the leading process of mineral processing, and its working effect directly affects the technical and economic indicators of mineral processing. The crushing and grinding of ore, especially the grinding operation, is a low-efficiency and high-consumption operation. Improving the efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/00B02C25/00
Inventor 段希祥曹亦俊肖庆飞罗春梅石贵明
Owner KUNMING UNIV OF SCI & TECH
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