influence of sodium silicate in nonmetallic flotation

Soluble sodium silicates, also known as 'water glass', are probably one of the oldest and most widely used industrial chemicals [2]. Among a wide variety of applications, sodium silicate is used as a deflocculation agent in clay mining processes and ore flotation because of its surface charge modifying ability. In ore flotation, sodium ...

Jul 13, 2016· "Ammo-phos," a crude monoammonium phosphate, is sometimes used in the flotation of oxidized gold ores. It has the effect of flocculating iron oxide slime, thus improving the grade of concentrate. Sodium silicate, a dispersing agent, is also useful for overcoming gangue-slime interference. Promoters or Collectors.

Jun 01, 1989· Influence of sodium silicate concentration Flotation tests at pH 10 in the presence of sodium silicate, predicted to give selective flotation of apatite (Mishra, 1982; Hanumantha Rao et al., 1988a,b ), did not show any significant selectivity, Consequently, tests were performed 133 6 O [C0z ] w103M O [C(lZ.] xl0=R ~u 1 0 [Mg= x10*M [ P ] xl04M ...

The sodium oleate and sodium stearate concentrations were 3.93 mmolll (1.196 g/I and 1 .204 g/l). The added calcium concentrations were0, 0.357, 0.893 and 1 .786 mmol/l, correspondingto 0, 2, 5 and 10Odl-l, respectiely. Theionicstrength wasadjusted to 0.02Mwith sodiumchloride. Sodium silicate concentrations were 0.2, 1 and3 gll. In all ...

May 01, 2009· Dolomite impurities are increasing in the currently mined phosphate deposits in Florida. Several research efforts have been conducted in various laboratories around the globe to find methods to economically removing the dolomite. However, a universal and cost-effective process is not now in commercial use. In this paper, a new process for dolomite/apatite separation is presented. The ...

The dosages of 1500, 1567 and 100 g/Mg of sodium silicate, sodium sulfide and potassium amyl xanthate, respectively, the conditioning time of 5 min for sulphidisation and pH=9.72 were chosen as ...

Fig. 1 .1Lead flotation in the presence of sodium polyacrylate 3223. Fig. 2 .2Lead flotation in the presence of sodium hexametaphosphate. Fig. 5 .Fig. 6 .56Zinc flotation in the presence of sodium hexametaphosphate. Zinc flotation in the presence of sodium silicate and metasilicate blend. ) .)0892-6875/$ -see front matter Ó 2009 Elsevier Ltd.

A conventional flotation method well known to the art is to float the economic nonmetallic minerals from the siliceous gangue materials employing oleic acid, sodium oleate, or similar anionic collecting agents in conjunction with various addition agents in acid, neutral, or …

Apr 01, 2016· Sodium silicate, as depressant or dispersant, is widely used as regulating reagent in the flotation of minerals [5,6]. In iron ore flotation, sodium silicate is used to disperse the kaolinite in a wide range of pH value [7]. Regarding the flotation mechanism of sodium silicate, there are few publications available.

Apr 09, 2016· Sodium silicate is sometimes added to liberate slimes; while the collector is usually a refined tall oil acid or similar product. It can be added to conditioner or in stages. An 8-cell No. 21 "Sub-A" Flotation Machine, non-metallic flotation type, equipped with multi-bladed moulded rubber or neoprene impeller and diffuser wearing plates ...

The influence of sodium silicate in nonmetallic flotation systems ... A study has been carried out on the action of the depressants quebracho and sodium silicate on the flotation of the mineral ...

The analysis of variance (ANOVA) statistical tool was used for evaluation of the influence of operating parameters, viz. the modulus and dosage of sodium silicate, on the flotation.

Nov 02, 2016· Pugh R, Stenius P (1985) Solution chemistry studies and flotation behavior of apatite, calcite and fluorite minerals with sodium oleate collector. Int J Miner Process 15:193–218. CAS Article Google Scholar 6. Fuerstenau MC, Gutierrez G, Elgillani DA (1968) The influence of sodium silicate in nonmetallic flotation system.

Dec 10, 2013· This paper presents the influence of sodium silicate modulus on iron ore flotation with sodium oleate collector. Bench flotation tests were performed at pH 7 with actual iron ore from Quadrilátero Ferrífero, Brazil, with 42.8% Fe and 37.2% SiO 2.Iron recovery averaged above 90% and the Fe contents in the concentrate were above 55%.

Apr 13, 2006· Flotation is the most efficient method in treating −0.5 mm coal, as coal is a low-value material and only frother and/or collector and/or sodium silicate are used as flotation reagent. The authors have studied the effect of sodium metasilicate in the presence of collector and frother and found that the former acted as a dispersant [ 15 ].

Dec 01, 2018· 1. Introduction. A typical reagent regime for scheelite flotation is called the "lime flotation process", which involves the addition of lime and sodium carbonate as co-pH modifiers, sodium silicate as a depressant and oleic acid (or sodium oleate) as the main collector (Vazquez et al., 1976, Yongxin and Changgen, 1983, Martins and Amarante, 2012).

Oct 01, 1993· Abstract. The mechanism of the action of sodium silicate in the flotation of phosphate was investigated by studying the nature of the silicate species both in solution and on the mineral surfaces and the influence of the silicate species on the flotation performances of the valuable mineral (apatite) and the gangue mineral (hematite).

Nov 01, 2019· Sodium oleate (NaOL) and sodium silicate (Na 2 SiO 3) were used as the collector and depressor, respectively.Al 2 (SO 4) 3 was used to enhance the depression performance of olivine, and sulfuric acid (H 2 SO 4) and sodium hydroxide (NaOH) were used for the pH adjustment of the solution.. 2.2. Single-mineral flotation tests. Flotation experiments were performed in a XFG-type flotation …

The action of sodium silicate on the flotation of salt-type minerals with oleic acid. Ph.D. thesis, University of London, 1980. Ph.D. thesis, University of London, 1980. Google Scholar

Sodium silicate is used in flotation to depress and/or disperse silicate minerals, as a result of. which CaO co ntent in the froth product is enriched. In the present case, however, increase o f ...

Apr 01, 1985· A study has been made of the adsorption of sodium silicate by calcite, fluorite and barite and the effect that this adsorption has on the flotation of these minerals with oleic acid. The results show that sodium silicate depresses these minerals by …

Aug 01, 1996· The results of bench-scale testing of five flotation processes for the separation of dolomite from phosphate are discussed. Each process is compared in terms of phosphate recovery, MgO content of the concentrate and reagent consumption. Water quality was found to play a major role in the performance of these processes. The effect of water hardness, in addition to other parameters, are …

US3295767A US308355A US30835563A US3295767A US 3295767 A US3295767 A US 3295767A US 308355 A US308355 A US 308355A US 30835563 A US30835563 A US 30835563A US 3295767 A US3295767 A US 3295767A Authority US United States Prior art keywords ore percent calcite pulp silicate Prior art date Legal status (The legal status is an assumption and is not a legal …

metallic values during flotation may have an important influence on the entrainment of serpentine. Although the mechanism of serpentine entrainment into ... Sodium silicate was employed as dispersant of gangue minerals, and pine oil as frother. All the tests …

The flotation separation of barite-calcite using sodium silicate as depressant in the presence of sodium dodecyl sulfate Xiong Chen 1, Guohua Gu 1, ... is a kind of important non-metallic mineral containing barium, which is widely used in ... The flotation results of calcite with NaOL were similar to those in the presence of SDS.

Apr 01, 1985· The term sodium silicate refers to a whole family of chemicals which con- sist mainly of sodium oxide and silicon dioxide in various proportions, and 0301-7516/85/$03.30 1985 Elsevier Science Publishers B.V. 178 whose composition can be represented by the general formula Na20 r SiO2, where r is called the "modulus" or ratio of the sodium silicate.

Sodium silicate is the most widely used modifi- er in non-sulphide minerals flotation. The reagent depresses silicate minerals significantly in flotation of different kinds of ores and can increase efficiency of calcium minerals separa- tion (Bogdanov et al., 1990). However the mech- anism of sodium silicate depression action is

sodium silicate, any one of several compounds containing sodium oxide, Na 2 O, and silica silica or silicon dioxide, chemical compound, SiO 2.It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid.

Feb 18, 2020· During the flotation of scheelite, the high temperature can improve the inhibition of sodium silicate to calcite and fluorite. In addition, before flotation, non-sulfide minerals usually need a more complex pulp preparation process, which includes scrubbing, desliming, heating and mixing slurry, high concentration stirring, etc.

Abstract The properties of sodium silicate and its influence on the floatability of muscovite before and after electrochemical modification were investigated, and the samples of muscovite were characterized by XPS and FITR. On this basis, the action mechanism of electrochemically modified sodium silicate and muscovite flotation behavior under sodium oleate system was discussed.