Pre-feasibility and Feasibility on Chinese uranium … and Feasibility on Chinese uranium production...
Transcript of Pre-feasibility and Feasibility on Chinese uranium … and Feasibility on Chinese uranium production...
Pre-feasibility and Feasibility on Chinese
uranium production
Beijing Research Institute of Chemical Engineering
and Metallurgy, CNNC, Beijing 101149, China
Niu Yu-qing
1、Introduction
2、Mining procedure of Chinese Uranium Mine
3、Pre-Feasibility and Feasibility
Conten
ts
1、Introduction
At the beginning of 21 century, under dual promotion
by Chinese newly nuclear power development layout and
great increase of national uranium demand, China has
increased steps to develop domestic uranium resource. A
number of uranium mine base is under plan and
construction or under development with reliable uranium
resource reserve or technical and economic feasibility
Sand stone,21% volcanic rock,22%
granite,33% others,8%
carbonate silicate mud ,16%
In China we found all type of uranium ore around the world
which can be divided into eight types with 22 sub-types. This
is disbennifit to selecte the mining and process method, and
increase difficulty of mining and metallurgy techniques.
<In-situ, 33%
>Open pit 7%Under ground,
60%
Conventional mining method is adopted in all hard rock of
Chinese mines. in-situ blasting leaching is already in industrial
application stage. In-situ leaching mining grows rapidly and
will be a mainly development mining method in China in 20’s
years.
Yi Li Site
under plan and construction Erlian,Dongsheng Site experiment and prefeasibility
Xiangshan Site under plan and construction
Guyuan, Tongliao Site technical and economic
feasibility
Because of special environment
pollution and radiation risk in uranium
mining process, there is a strict mining
permission system in China for uranium
deposit mining, and a strict project
allowance procedure. The Chinese uranium
mining franchise has been commissioned
into the China National Nuclear Corporation
(CNNC).
2 Mining procedure of Chinese Uranium Mine
The procedure of Chinese uranium ore mining
Prospect Permission
Mining deposit Permission
Project establishment
Report of feasibility
Engineering design
Construction Project
Uranium production
decommission and rehabilitations
A reliable geological materials is very
important in the development of mine, so that
the report of geological prospecting results will
be approved by the national mineral reserves
examination and approval authority.
Conceptual feasibility is required to be
attachment.
1) Geological information
Corporation of uranium mine submits
the concrete project to Government
according to national economic
development. It includes :
• mineral type, resource reserve,
• deposit condition, mine geology location,
• mining method, production scale, quality of
the product,
2) Project proposal
• market forecast, capital financing method,
• economic and social benefit of mine mining ,
• radiation defending and environment protection
method etc.
Project proposing will be evaluated and
censored by Government. The development of
uranium mine will be decided after official
approval.
• mining district and resource reserve in the mine area,
• mining main design scheme of the mine( technology, technique and equipment),
• technique and economy condition of production,
• safety and environment protection, financing etc.
The feasibility report will be not pass through until approval of environment and safety evaluation of the construction project.
3) Feasibility
At this stage by the basic design
requirement, it is needed additionally:
• special design of safety
• special design professional sanitation
• land recultivating plan
• power supply agreement etc
all above should be approved by relative
authority department.
4) Basic design and constructing
In the uranium mine production
process, it is always supervised under
relative charge department of safety,
environment, fire protection and
professional sanitation etc. in order to
meet with present Chinese law and
regulations demands.
5) Mining production of uranium
At the end of the mining, the owner submits
decommission program of the project.
decommission treatment and land remediation is
carried out. Cost comes from national special
decommission treatment fund. After
decommission, the owner general supervises it
2 to 5 years, and evaluate the final
environmental status, then submits it to local
government management .
6) Decommission
Pre-feasibility is based on detail survey and prospecting report.
• uranium resources, reserve data,
• uranium mining and metallurgy,
• mining technical conditions as other material and information of mine area transportation,
• power supply and water supply etc.
3 Pre-Feasibility report
Industrial index of uranium mines
Type
Hard rock(Conventional mining)
General
industrial
demands
Index Parameter
Cut-off grade(ωB,) 300×10-6
Lowest industrial grade 500×10-6
Minimum mining thickness 0.7 m
Rock eliminating thickness 0.7 m
Ore grade
High (rich) ≥3 000×10-6
Mid (ordinary) 1 000×10-6~3 000×10-6
Low (poor) <1 000×10-6
• The contents of feasibility study include:
• C1 General introduction
• C2 Demand forecast and proposal construction scale
• C3 Resource, raw and processed materials, fuel and public infrastructure
• C4 Mill construction condition and scheme of mill site selection
• C5 Design scheme
• C6 Environment protection and decommission treatment
• C7 Organization of enterprise, work force and staff training(estimate)
• C8 Schedule suggestion for implement
• C9 Evaluation of capital investment and financing
• C10 Evaluation of social and economic benefit
4 Feasibility report