Study on the New Combined Technology of Tungsten Dressing and Metallurgy and its Economic Feasibility Analysis

2014 ◽  
Vol 694 ◽  
pp. 321-326
Author(s):  
Hai Ling Zhu ◽  
Hai Bo Deng ◽  
Chen Chen
Keyword(s):  
New Technology ◽  
Economic Feasibility ◽  
Feasibility Analysis ◽  
Original Process ◽  
Autoclave Leaching ◽  
Existing Problems ◽  
High Alkali ◽  
Break Even Point ◽  
Polymetallic Ore ◽  
Analysis Point

Based on the existing problems in the tungsten beneficiation of Shizhuyuan polymetallic ore, we present a new combined technology of “iron removal by magnetic separation—desliming by flotation—scheelite and wolframite bulk flotation—high alkali autoclave leaching of tungsten rough concentrate” to increase the comprehensive utilization of tungsten resource. The results show that the tungsten flotation operation obtains the better indexes than the original process at the same point, and the WO3 recovery increases to 73% when the WO3 grade of rough concentrate is 30%. In hydrometallurgical operation, the leaching rate of WO3 is above 94%, decomposing tungsten mineralsa effectively and realizing the recycle of sodium hydroxide in the high alkali tungsten solution. The economic feasibility analysis point out this technology is recommended to be adopted when the WO3 grade of bulk concentrate is 30%, and the economic benefit of the new technology will reach the break-even point when the price of metallurgical products WO3 reaches 95,000 RMB/t.

Waste management studies in a Brazilian microregion: GHG emissions balance and LFG energy project economic feasibility analysis

2018 ◽  
Vol 19 ◽  
pp. 31-43 ◽  
Author(s):  
Bruno Vasconcelos Rosa Pin ◽  
Regina Mambeli Barros ◽  
Electo Eduardo Silva Lora ◽  
Ivan Felipe Silva dos Santos
Keyword(s):  
Waste Management ◽  
Ghg Emissions ◽  
Economic Feasibility ◽  
Feasibility Analysis

Technical and economic feasibility analysis of an anaerobic digestion plant fed with canteen food waste

2019 ◽  
Vol 180 ◽  
pp. 938-948 ◽  
Author(s):  
Zeng Huiru ◽  
Yan Yunjun ◽  
Federica Liberti ◽  
Bartocci Pietro ◽  
Francesco Fantozzi
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Economic Feasibility ◽  
Feasibility Analysis

scholarly journals Economic Feasibility Analysis of the Metropolitan Area Green Heat Project

2015 ◽  
Vol 24 (1) ◽  
pp. 32-41 ◽  
Author(s):  
Sang-Kee Kim ◽  
Lae Hyun Kim ◽  
Seung-Hoon Yoo
Keyword(s):  
Metropolitan Area ◽  
Economic Feasibility ◽  
Feasibility Analysis

scholarly journals Gas Injection Optimization to Increase Oil Production at MRA PT. PHE ONWJ

2021 ◽  
Vol 2 (2) ◽  
pp. 75
Author(s):  
Harry Budiharjo Sulistyarso ◽  
KRT Nur Suhascaryo ◽  
Mochamad Jalal Abdul Goni
Keyword(s):  
Gas Injection ◽  
Economic Feasibility ◽  
Feasibility Analysis ◽  
Offshore Platforms ◽  
Total Production ◽  
The North ◽  
Artificial Lift ◽  
Production Wells ◽  
Java Sea ◽  
Gas Lift

The MRA platform is one of the offshore platforms located in the north of the Java Sea. The MRA platform has 4 production wells, namely MRA-2ST, MRA-4ST, MRA-5, and MRA-6 wells. The 4 production wells are produced using an artificial lift in the form of a gas lift. The limited gas lift at the MRA Platform at 3.1 MMSCFD makes the production of wells at the MRA Platform not optimal because the wells in the MRA Platform are experiencing insufficient gas lift. Optimization of gas lift injection is obtained by redistribution of gas lift injection for each. The results of the analysis in this study indicate that the optimum gas lift injection for the MRA-2ST well is 0.5552 MMSCFD, the MRA-6 well is 1.0445 MMSCFD, the MRA-5 well is 0.7657 MMSCFD, finally the MRA-4ST well with gas injection. lift is 0.7346 MMSCFD. The manual gas lift in the MRA-4ST is also replaced based on an economic feasibility analysis to ensure that the gas lift injection for each well can be kept constant. The redistribution of gas lift carried out by the author has increased the total production rate of the MRA Platform by 11,160 BO/year or approximately USD 781,200/year. Keywords: Gas lift; Insufficient; Optimization

scholarly journals Economic feasibility of obtaining wood phytomass through accelerated cultivation of pine wood on postagrogenic lands

2021 ◽  
Vol 941 (1) ◽  
pp. 012003
Author(s):  
Sergey Yanush ◽  
Dmitry Danilov ◽  
Aleksei Kharlanov
Keyword(s):  
Economic Efficiency ◽  
Stand Density ◽  
Economic Feasibility ◽  
Wood Chips ◽  
Leningrad Region ◽  
Wood Biomass ◽  
Pine Wood ◽  
Stem Wood ◽  
Short Period ◽  
Break Even Point

Abstract The paper examines economic efficiency of obtaining wood biomass through accelerated cultivation of pine on postagrogenic lands of the Leningrad Region of Northwest Russia. In experimental pine plantations, we selected model trees and calculated the stem wood biomass of 11-year old stands with different stem densities. Assessments of the economic efficiency of the production of wood chips from pine wood grown on postagrogenic lands were based on a set of machines and mechanisms, consumables and wages. A break-even point was determined for the production of wood chips in plantations with different stem densities. In the variant with a stand density of 2900 trees per hectare, it is possible to make a profit, because a break-even point was obtained for the investments made. Pine stands of such density can be taken as a prototype, when creating and growing short rotation plantations. Based on the results of the study, it is possible to predict a further increase in pine wood biomass in a plantation on post-agrogenic soils. On postagrogenic lands, marketable wood pulp can be obtained within a short period of time; thus such lands will be involved in an economic turnover.

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