The determination of cutoff grade involves complicated analysis and calculations, and it has close relations with the knowledge of geology, mining, mineral processing, applied mathematics, economics and management.
Achievements in ore beneficiation,energy saving,quality improvement,enlargament of product variety,environmental protection,comprehensive utilization,process technology development and theoretical research are reviewed. Future development direction of Chinese alumina production technology is discussed.
The recovery rates of mining and ore dressing and ore impoverishment rate,taken together,are called“three rates”. “Three rates”in the mine production are synthetic index of mine enterprise management and exploitation of mine resources. In this paper,the definition and calculating method of “three rates” are briefly introduced and a few points on strengthening management of the indexes of “three rates”are given.
In this paper,the present situation of copper ore dressing industry of China is generally introduced including the proportion of copper concentrate in raw materials for copper smelting and the gap between China and world in ore dressing technology The comprehensive effect met by copper ore dressing industry of China, the countermeasures which have to be taken by copper enterprises and the historical task of personnel engaged in copper ore dressing industry after entering into WTO are expounded
The result shows clearly that a production management was controlled thus the indexes of ore loss and dilution ratio were reduced and the ore dressing recovery percentage was raised and economic profits were achieved.
Since the ore dressing and mining capacity reached 750t/d in 1998,Gaoyao Gold Mine has enhanced the application of new technology and scientific management in production. In this mine,the exprimental study in the fields of geology,mining,mineral processing and smelting are often made; the investment of advanced science and technology is increased;
The recovery rates of mining and ore dressing and ore impoverishment rate,taken together,are called“three rates”. “Three rates”in the mine production are synthetic index of mine enterprise management and exploitation of mine resources. In this paper,the definition and calculating method of “three rates” are briefly introduced and a few points on strengthening management of the indexes of “three rates”are given.
In this paper,the present situation of copper ore dressing industry of China is generally introduced including the proportion of copper concentrate in raw materials for copper smelting and the gap between China and world in ore dressing technology The comprehensive effect met by copper ore dressing industry of China, the countermeasures which have to be taken by copper enterprises and the historical task of personnel engaged in copper ore dressing industry after entering into WTO are expounded
The result shows clearly that a production management was controlled thus the indexes of ore loss and dilution ratio were reduced and the ore dressing recovery percentage was raised and economic profits were achieved.
Since the ore dressing and mining capacity reached 750t/d in 1998,Gaoyao Gold Mine has enhanced the application of new technology and scientific management in production. In this mine,the exprimental study in the fields of geology,mining,mineral processing and smelting are often made; the investment of advanced science and technology is increased;
It has wide application in the field of mining and mineral processing where it can be used as a design and diagnostic tool for industrial size tumbling mills.
To implement data calculating, relative matrix is used to express the flotation flowsheet, special mineral processing models and optimizing mathematical models have been used.
Appropriate sample preparation and mineral processing methods were selected which utilised contrasts in texture, particle-size, hardness, specific gravity and magnetic susceptibility between gangue and target constituents to achieve beneficiation.
The experimental results in 2000 mm×80 mm×200 mm model apparatus show that the vibration fluidized bed can efficiently separate fine coal of size 6-0.5 mm, the beneficiation lower limit is 0.5 mm, the Ep value is 0.07.
Faujasite is more abundant in these zeolitic tuffs than at any other locality in the world that has yet been described, and the tuffs are considered to have excellent potential for beneficiation.
Immobilization of 90Sr and 137Cs in geoceramic matrices synthesized on the basis of phosphatized calcinate of simulated radioactive wastes and apatite ore dressing tailings is studied.
Quantitative examination of fine-grained ore dressing products depends on good quality of the sections and on whether very small particles and areas of grains can be determined.
A method is proposed for ICP and AAS analysis of geological samples and samples from ore dressing after fusion with lithium borates and dissolution with acids.
Abstract The present situation of the applicationof the popular type of computers in the min-ing enterprises in our country were anal-ysed. The importance of the computers inthe management of production data in themineral processing was set forth. The de-sign and programming of the managing sys-tem of production data in the mineral pro-cessing were diseussed.
From law and practical aspects,the ap-plication aspects for MineraI ResourcesCompensating Fee are discussed.Severalproblems about the charge for mineral prod-ucts for mineral processing products,brickand file clay,cement are included.
An open iron mine constructed at the time of″cultural revolution″encountered troubles due to poor oresource,incomplete design and construction and dressingtechnological process not being taken. The mine was al-most cut off the second time due to high cost and seriousdeficit.In such condition the associated policies weredraw,and a series of technical reforms were carried.Theoutput of the mine was so increased year by year.In 1989it joined the ten largest open mines in China.
选矿
mineral processing 
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