Results 61 to 70 of about 24,073 (302)

Henrietta group, San Juan County, Colorado

open access: yes, 2022
Mine report no. 1399.Includes prospectuses and map.Typescript (carbon copy).Henrietta group, San Juan County, Colorado / B. Sadtler -- Henrietta Copper Mining Company -- The San Juan Smelting & Refining Company -- Provisional report upon the Henrietta ...
Pridham, Harvey, Sadtler, B.
core  

Green and sustainable synthesis of magnetite from copper slag via citrate complexation for methylene blue dye removal from water

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study proposes a novel, green, and sustainable method for synthesizing magnetic iron oxides from metallurgical copper slag (CS), leveraging its iron content as a valuable resource. Iron was extracted via acid leaching using edible citric acid (ECA), forming a citrate–iron complex (CSL), which was subsequently thermally decomposed at 300°C
Melisa Portilla‐Sangabriel   +4 more
wiley   +1 more source

Bullion production in imperial China and its significance for sulphide ore smelting world-wide

open access: yes, 2015
Gold and silver production was of major importance for almost all ancient societies but has been rarely studied archaeologically. Here we present a reconstruction of a previously undocumented technology used to recover gold, silver and lead at the site ...
Martinón-Torres, M   +6 more
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ASPEK HUKUM SIMPANAN ANGGOTA KOPERASI PADA KOPERASI KARYAWAN SMELTING (Studi kasus Koperasi Karyawan PT Smelting- Gresik) [PDF]

open access: yes, 2022
Penelitian ini bertujuan untuk mengetahui aspek hukum yang ada pada simpanan anggota koperasi PT Smelting. Sebagaimana diketahui koperasi PT Smelting ini merupakan koperasi yang didirikan oleh karyawan PT Smelting – Gresik sejak tahun 1999.
UNGGUL SATOTO, 02118105
core  

Crystallization of Cathode Active Material Precursors from Tartaric Acid Solution

open access: yesChemSusChem, Volume 18, Issue 6, March 15, 2025.
This work investigates a novel approach for closing the gap between recycling and production of lithium‐ion battery cathode material. The new concept is based on antisolvent crystallization of metal carboxylates, which can be directly used as precursors in production of cathode material.
Chunyan Ma   +5 more
wiley   +1 more source

Review and prospects of shear test of bolted rock joints

open access: yesDeep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren   +4 more
wiley   +1 more source

About the system of social and economic development of Vladikavkaz city / О системе социально-экономического развития города Владикавказа [PDF]

open access: yesСоциология города, 2014
The author examines the efficiency indicators of the activity of the local governments in Vladikavkaz, analyzes the efficiency of its activity in the implementation of certain programs / В статье рассматриваются показатели эффективности деятельности ...
Romanova Natalya Grigorevna / Романова Наталья Григорьевна
doaj  

Nickel Laterite Smelting Processes and Some Examples of Recent Possible Modifications to the Conventional Route

open access: yesMetals, 2019
The treatment of laterites has been a research hotspot in extractive metallurgy over the past decades. Industrially, the pyrometallurgical treatment of laterites is mostly accomplished with a well-established method, namely, the rotary kiln− ...
Ender Keskinkilic
doaj   +1 more source

Mechanistic insights across curing regimes for enzymatic and biopolymer‐optimized reinforcement in rock masses

open access: yesDeep Underground Science and Engineering, EarlyView.
This study examines the effects of curing temperature on the mechanical behavior of underground rock masses treated with enzyme‐induced calcite precipitation (EICP) and an innovative biopolymer‐modified EICP (BP‐EICP). Abstract Biocementation is an innovative and sustainable technique for reinforcing weak and weathered rock masses in natural and ...
Mary C. Ngoma, Oladoyin Kolawole
wiley   +1 more source

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