Potential Use of Pomalaa Nickel Slag as A Substitute for Sand in Brick Making

The latest variance of nickel slag from PT.Antam Pomalaa hasmaterial gradation size equivalent to sand has, so it has potentially as a sandsubstitute material. The study aims to determine the use of fine nickel slag asa substitute for sand in brick making. Nickel slag used is variation of 0%,25%, 50%, 75% and 100% against of total weight of sand. The brick isdesigned with a cement – sand ratio of 1 : 7. The experimental is a hollow brickwith dimension of 40 cm×18 cm×10 cm. Compressive test is done after brickcuring along 28 days. The maximum result of compressive test is obtained inthe use of 50 % nickel slag of 19.58 kg/cm2 compared to the brick withoutnickel slag of 12.92 kg/cm2. The conclusion that by using a fine nickel slagtype of fenil iv up to 50 % on production, it can reduce sand use and improvethe strength up to 51%.

Retention of anions in cobalt hydroxide with Ni substitution to emphasize the role of anions and cations for high current density in oxygen evolution reactions

Herein, we report the fabrication of remarkably fine nickel-substituted α-Co(OH)2 sheets using an ingenious co-precipitation method at a lower pH value.

Branched ultra-fine nickel oxide/manganese dioxide core–shell nanosheet arrays for electrochemical capacitors

Hierarchically core–shell structure composed of two dimensional NiO and MnO2 nanosheets demonstrate good electrochemical performance in supercapacitor.

Exploiting the Influence of Oxidization on Ultra-Fine Copper and Nickel Sulfide Containing Pt-Pd in Yunnan Mine

It is known that oxidation is one of the most common ways for penlandite to be introducted into tailing during traditional coarse-particle sulfide flotation. However, it could become much more complicated and challenging problems for the low-grade, fine-disseminated Cu-Ni sulfides containing Pt and Pd in Yunnan Mine, accompanied with more than 75% of the content of MgO in the ore sample is. Direct flotation tests had been conducted to extract the metallic values as much as possible by adding traditional depressants and collectors, such as carboxylmethyl cellulose, starch, sodium silicate, butyl xanthate, (BX), butyl ammonium dithophosphate (BA) and etc., the relatively satisfied recoveries of Cu, Ni, Pt and Pd in the concentrate from bench flotation tests were obtained, however, more than 30% of metallic values still lost in the slime. In this study, bench flotation tests for the ore sample fromYunnan Mine, micro-flotation tests of serpentines and pentlandite from Jinchuan Mine and their settling rate tests were conducted to figure out how the oxidation influence the recovery of the ultra-fine nickel sulfide. All the tests results pointed to the presence of over-oxidation on the ultra-fine nickel sulfide surface and lead to the loss of Ni containing Pt and Pd in the slime tailing. Some methods which tried to slow the speed of oxidation on mineral surface during grinding and flotation were introduced in order to recover the values before over-oxidation of sulfides; however, the slime coating of serpentines also may play an important role in disturbing the floatability of ultra-fine sulfide.

The Preparation of CaZrO3 Coating Ultra-Fine Nickel Powders via Chemical Deposition

Aiming at flexible oxidation in the MLCC production, the surface modification of the ultrafine nickel powders has been carried out to coat Ni powders with CaZrO3 by using chemical precipitation method. CaZrO3-coated composite ultrafine nickel powders have been synthesized in methanol-water solvent by both precipitation agents solution and zirconium-calcium solution dripped into the Ni-particle-dispersed methanol solution at the meantime. Composite nickel powders obtained under the optimum conditions were characterized, It was approved that those composite nickel powders still possessed good dispersion, the resistance to oxidation and shrinkage were improved greatly.