RESEARCH enrichment OF COAL THE TORGOY-DOBO OF HYDRAULIC CLASSIFICATION

FUNDAMENTALS OF THE LUMP CRUSHING THEORY. WORKING PROCESSES OF CRUSHING AND SCREENING EQUIPMENT. LECTURE 8

Spravochnik Inzhenernyi zhurnal ◽

10.14489/hb.2021.10.pp.025-032 ◽

2021 ◽

pp. 25-32

Author(s):

A. I. Nizhegorodov

Keyword(s):

Technological Process ◽

Rock Properties ◽

Road Vehicles ◽

Roll Crusher ◽

Screening Equipment ◽

Hydraulic Classification ◽

Working Processes

The article presents materials of Lecture 8 in Theory of carrying and lifting, construction and road vehicles and equipment, which describes the following issues: the rock properties, the rock crushing degree, the basics of the lump crushing theory and types of crushing machines. The technological process of crushing with a roll crusher is described; the values of forces acting in roll crushers are calculated.Along with the process of crushing, the article deals with the processes of segregation and concentration, the basic of the screening (fractionation) theory and features of the hydraulic classification of nonmetallic materials.

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Suspension flow in crystallizers with and without hydraulic classification

Chemical Engineering Research and Design ◽

10.1016/j.cherd.2009.08.008 ◽

2010 ◽

Vol 88 (9) ◽

pp. 1194-1199 ◽

Cited By ~ 6

Author(s):

Roch Plewik ◽

Piotr Synowiec ◽

Janusz Wójcik ◽

Agata Kuś

Keyword(s):

Suspension Flow ◽

Hydraulic Classification

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Flotation classification in closed-circuit grinding as a way of reducing sulphide ore overgrinding

Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal ◽

10.21440/0536-1028-2021-1-85-96 ◽

2021 ◽

pp. 85-96

Author(s):

Iurii Morozov ◽

◽

Tatiana Intogarova ◽

Olga Valieva ◽

Iuliia Donets ◽

...

Keyword(s):

Mass Fraction ◽

Froth Flotation ◽

Closed Circuit ◽

Laboratory Studies ◽

Copper Ore ◽

Cycle Simulation ◽

Sulphide Ore ◽

Problem Laboratory ◽

Hydraulic Classification

Research object and aim. Flotation classification in closed-circuit grinding is a way of improving copper ore flotation indicators by reducing minerals overgrinding. Due to valuable components froth recovery with their uncovering in the process of grinding, loss of copper in flotation tailings with secondary slime are reduced significantly. The research aims to study the possibility to improve the flotation of copper ore based on the use of flotation classification in the closed-circuit grinding. Methodology. In order to solve the problem, laboratory studies on closed-circuit grinding experimental modeling were carried out in a mode with and without flotation classification of hydraulic classification discharge. In each grinding mode, five stages of closed-cycle simulation have been implemented. Flotation classification was carried out in froth flotation modes with froth treatment with and without the tapered chute. According to experimental results, the loss of copper has been determined with slime in hydraulic classification discharge and flotation classification, and flotation classification end-product balance was calculated when operating in the closed-circuit grinding. Summary. The obtained experimental data prove the possibility of improving copper ore flotation by reducing minerals overgrinding in the course of flotation classification in closed-circuit grinding. The technology of flotation classification with froth treatment in tapered chutes make it possible to obtain prime concentrate with 18% copper mass fraction when extracting 37.7% copper into it, and final tailings in flotation classification discharge with 0.13% copper mass fraction under 2% loss.

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The application of a new type of hydraulic classification equipment: swirl continuous centrifugal separator

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/207/1/012055 ◽

2017 ◽

Vol 207 ◽

pp. 012055

Author(s):

Haiyun Xie ◽

Rongxin Liu ◽

Yuanhong Li ◽

Pengfei Zhang ◽

Chao Ding ◽

...

Keyword(s):

Centrifugal Separator ◽

New Type ◽

Hydraulic Classification

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Sedimentation Hydraulic Classification.

Industrial & Engineering Chemistry ◽

10.1021/ie50433a017 ◽

1946 ◽

Vol 38 (1) ◽

pp. 16-17

Author(s):

R. P. Kite ◽

A. J. Fischer

Keyword(s):

Hydraulic Classification

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Effect of Hydraulic Classification on Iron Ore Tailings Preparing High Strength Construction Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.800.330 ◽

2013 ◽

Vol 800 ◽

pp. 330-335 ◽

Cited By ~ 1

Author(s):

Hui Wu ◽

Wen Ni ◽

Chang Long Wang

Keyword(s):

Iron Ore ◽

Construction Materials ◽

High Strength ◽

Sieve Analysis ◽

Iron Ore Tailings ◽

Complete Chemical Analysis ◽

Particles Size Distribution ◽

Cementitious Activity ◽

Hydraulic Classification

The aim of this study is to understand the effect of hydraulic classification on the iron ore tailings, and develop the cementitious activity of tailings to prepare construction materials. It was indicated that hydraulic classification can effectively divide the particulates of tailings into coarse and fine powders. The compression strength of the prepared construction materials are 87.83 MPa at 28 days, which have higher strength than the construction materials using original tailing, The variation in the tailings samples after hydraulic classification and the cementitious material after step-milling was characterized by sieve analysis, complete chemical analysis, scanning electron microscopy (SEM), and the particles size distribution. By mechanical properties testing and microstructure analysis shows that after hydraulic classification of tailings under the same conditions, the strength of the 3 days, 7 days, 28 days are higher than that of the original tailings. The main phases in the system are the rod of ettringite and low crystallinity or the amorphous C-S-H gel, and residual Ca(OH)2.

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