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Abstract

Content

Introduction

With the increasing mechanization of mining, taking into account the large number of operations during unloading, transport, training processes and basic processes of enrichment, influence the aquatic environment at different material properties (mechanical and quality), there is a tendency of uneven distribution of the practical balance the enriched varieties of anthracite.

1. The purpose and objectives of the study

Purpose - to determine the coefficients of mutual transition of size classes and extract concentrate on varieties with appropriate efficiency of the main objects of technological and water-slurry circuit.

The aim of the work is the definition of dependency output varieties of products in the distribution of quality indicators based on practical observation and testing of the characteristic points of the logistic transport chain circuit diagram object devices of PJSC GOF "Red Star".

2. Technological process

Passage of raw materials for manufacturing operations points enrichment process is accompanied by a modification of size and quality.

The mechanical action on the particles causes a change in size distribution (largely due to the destruction processes shocks and mechanical abrasion during transportation) and acts on the redistribution of size fractions in the size distribution range.

Daylight quality of the components in the concentrate stream, waste, losses with slurry and middlings operation by operation leads to a change in the predicted results. Practical observation of the modification of the raw material at all points of the technological process allows to calculate and define the generalized coefficients by which it is possible to carry out the forecast output of processed products GOF "Red Star".

3. Factors redistribution

Factors redistribution should be classified:

  1. Changing the particle size distribution due to impact loads on the material.
  2. Changing the particle size distribution due to the impact of destructive mechanical friction forces during transportation of the material.
  3. Changes in yield varieties of quality characteristics (extract kontcentratnyh fractions).
  4. Redistribution balance of incoming raw materials due to the loss from the slurry, and the imperfection of separation processes.

4. The basic idea

The basic idea is practical enterprise surveys, sampling of all points rerouting logistic material moving. On the basis of the particle size distribution and subsequent factional characteristics of the products at the point of separation and calculate the average of previous observations and statistical factors generalize to the total rates for all size classes and by-products.

Findings

  1. Studies (practical based on sampling, particle size distribution, the fractional modeling enrichment processes for the separation density work units) allowed to determine the average dynamic coefficients of redistribution varieties size of incoming raw materials during processing to GOF "Red Star". Raw materials were tested the most powerful resource bases-mines: they. Lutugino, Dawn, Progress.
  2. Odds are mean dynamic total value of which depends on the distribution coefficients for each specific sampling points and the impact of the project on the material.
  3. Practical use of predictive factors for the trade balance of the practical end product.
  4. Analysis of mechanical means (belt conveyor devices, devices interspersing material accumulation, concentration, dehydration, etc.) gives the idea of the effectiveness of GOF "Red Star" as an object in a holistic sense and is not dependent upon factors commonly accepted standards in terms of design concentrators enterprises.
  5. The company has a peculiar workflow mode "on wheels". Cumulative volumes in tanks is not provided (at the time of the survey company). This affects negatively on the dimensions of the coefficients (without filling the material hopper, so the height of differences - the maximum, shock load - maximum).
  6. To mitigate the performance coefficient is necessary to provide the use of lining surfaces guide peresypnyh devices with elastic and durable properties (sliding material in places) and vertical combination of chain entanglements with the wall of the baffle plate type conveyor belt (place of the vertical drop of the material and the impact of the vertical fence).

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