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a grinding method

A technology of ore grinding and grinding media, which is applied in the direction of grain processing, etc., to achieve the effect of increasing the degree of dissociation

Active Publication Date: 2015-12-02
WENGFU (GRP) CO LTD
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Embodiment

[0018] For the grinding operation in the mineral processing project of the medium and low-grade project of a phosphate ore concentrator of a limited liability company, the specification of the ball mill used is ф4.575m×6.1m, and its processing capacity is 160 tons / hour. Install and add steel balls and steel columns, the addition ratio is steel ball: steel column is 5:1.5, to ensure that the filling rate of the mill medium is 40%-45%, and the addition amount is 1.8-2.2 tons;

[0019] The specifications of the steel balls are ф80mm, ф50mm, and ф30mm respectively, and the addition ratio is 5:3:1;

[0020] The steel column has a diameter of 50mm and a length of 200mm and 300mm, and the addition ratio is 1:1;

[0021] The second step is to crush the phosphate rock in three stages of coarse, medium and fine, and then enter the mill. The grain size of the phosphate rock is as follows: ① 92% of the phosphate rock is less than -15mm, and 95% of the phosphate rock is less than -20mm;

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Abstract

The invention discloses an ore grinding method. According to the ore grinding method, the specification Phi of a ball grinding mill is phi 4.575m*6.1m and the treatment capacity is 160 tons / hour. The method comprises the following steps: 1. adding steel balls and steel columns into the ball grinding mill; 2. carrying out feed-grinding to enable ores with particle size of below -15mm to achieve 92% and ores with particle size of below -20mm to achieve 95%; 3. carrying out wet grinding, wherein the ore grinding concentration is controlled to be 65%-70%; 4. periodically adding ore grinding mediums. The method has the characteristic of selective grinding, thereby being conductive to enhancing the degree of ore monomer separation; dolomite evenly mixed in phosphate ores can be separated out and ore pulp is not subjected to argillization; a good condition is created for the ore dressing work in downstream procedure and a foundation is laid for production of high grade phosphate concentrate. The method is applicable to the procedure of ore grinding in mineral processing.

Description

technical field [0001] The present invention relates to ore dressing technology, and furthermore, relates to an ore grinding method. Background technique [0002] The grinding process is the core of the mineral processing plant, which not only determines the production scale of the mineral processing plant, but also directly affects the mineral processing indicators. With the development of industry, mine resources are becoming more and more tense. How to adapt the beneficiation and grinding process to the change of mine resources is a technical problem that needs to be solved urgently. [0003] The high-quality and enriched phosphate rock resources of a large phosphate mine have been exhausted, and the ore grade of the second-phase replacement project is between 22% and 24%, which is medium and low-grade phosphate rock; the MgO content is as high as 5% to 10%. SiO 2 The content is 10% to 12%, mainly composed of calcium-magnesium phosphorite and silicon-calcium phosphorite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/00
Inventor 曹江洪何德飞庹宇翔宋友龙杨安淬万义坤田仕军
Owner WENGFU (GRP) CO LTD
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