low temperature flotation agent for hematite and its preparation method

The present invention relates to a kind of hematite reverse flotation desilication methods, belong to mineral floating separation technology field.Other bloodstone sample ore to be selected and water are mixed evenly to obtain ore pulp, under ore pulp natural ph, the collecting agent are added by a kind of hematite reverse flotation desilication …

Abstract: Uniform acicular hematite particles were prepared by two steps hydrothermal method from Fe(OH) 3 gel. The effect of nucleating temperature, pH and Sn 4+ ions on the morphologies of hematite particles was studied. The experiments showed that uniform acicular particles can be obtained. First the suspension of Fe(OH) 3 aged at 50～80℃ …

Yang et al. [12] attempted to inhibit hematite floatability with corn starch, aiming to disclose the effect of starch solubility on the flocculation-flotation separation of quartz and hematite ...

When α-BLA was used as a collector, the recoveries of hematite and FAp decreased slightly but still achieved 91.01% and 91.47% at the flotation temperature 19 °C. When LA was used as a collector, the recoveries of the two minerals were significantly reduced to 79.05% and 68.22% at the same temperature.

In this context, a low-grade hematite ore with 56.5% Fe has been subjected to heat treatment followed by grinding and wet high intensity magnetic sepn. (WHIMS). …

Thus, several investigations have been conducted to explore a green approach for upgrading low-grade hematite ores by considering eco-friendly biodegradable depressants 1,[9][10][11][12][13][14 ...

The invention discloses a phosphorus ore flotation collecting agent, particularly relates to a low-temperature phosphorus ore flotation collecting agent and a preparation method thereof, and belongs to the technical field of flotation collecting agents. According to the low-temperature phosphorus ore flotation collecting agent, octadecenoic acid …

Medium-grained hematite refers to the ore with a particle size of 0.3-2mm embedded in the ore, and it is also a relatively easy-to-select hematite ore. The main …

There was an instance where the maximum hematite flotation using 2.5 × 10 −5 molar sodium oleate occurred at pH 4, but under a 45 min conditioning time (Laskowski and Nyamekye, 1994). Previous work by the author also recorded a hematite flotation maximum at pH 5 for an oleate addition of 2 × 10 −5 molar (Quast, 2012b). This …

Flotation recovery of hematite at pH 4 remained high under equilibrium oleate concentrations above the critical hemi-micelle concentration of oleate. Oleate …

Finally, the red iron pigment was produced via a high temperature hydrothermal method in order to increase the additional value of this ultra-low-grade limonite. The optimal parameters were 10.0 g/L of …

Porous ceramics were prepared with spodumene flotation talings (SFT), kaolin and low-melting point glass (LPG) powder, whose pores were formed by the chemical reaction of hydrogen peroxide (H2O2).

Flotation is one of the most common methods used to recover iron ore, which includes reverse flotation of gangue with cationic collector [6][7][8] and direct flotation of iron ore with anionic ...

The number of hydroxyethyl groups can be increased under low-temperature conditions. It is shown that phosphenox is a good collector for fluorite, …

Carbon content in GFC was 85.6%, and the main gangues were quartz, hematite, and silicate. The route contains the three-step purification of the low pulp density flotation, low-temperature alkali roasting, and acid leaching. The high-grade flotation concentrate with 95% carbon content was produced by low pulp density flotation.

The invention belongs to collophanite flotation technology, and relates to a collophanite normal-temperature direct flotation desilication collecting agent and a preparation method thereof, wherein the collecting agent comprises the following components in parts by weight: 95-100 parts of fatty acid, 10-15 parts of sodium hydroxide, 3-8 parts of …

The invention relates to a preparation method of a floatation depressing agent, in particular to a preparation method of a micro-fine particle hematite reverse flotation depressing agent. The micro-fine particle hematite reverse flotation depressing agent is prepared from cornstarch, ammonium ceric nitrate, acrylamide, sodium bisulfite, …

The invention discloses a preparation method of a low temperature resisting fluorite flotation collector. The method comprises the step of ensuring that acid oil produced in oleic acid and refined vegetable oil serves as a basic raw material, under the reaction condition of the temperature of 20-40 DEG C, and adding sulfuric acid which accounts …

Considering the better collectability of amide-amine for quartz flotation and lower adsorption affinity for hematite surface than etheramine, the amide-amine is a …

The invention relates to a hematite dephosphorizing agent, a medicine is an aqueous solution of Thiobacillus ferooxidans and sodium aliphatate, wherein the weight ratio of the sodium aliphatate and Thiobacillus ferooxidans is 19:1, the concentration of each solute is 0.1mol/L, a preparation method comprises the following step: preparing a sodium …

The temperature increased rapidly to a constant value within 2 min for each of the samples (Fig. 12). The rate of the temperature rise of the hematite nanofluid with SDS-prepared nanoparticles was the highest, increasing by 3 °C/min from 28 to 35 °C. Fourier's field equation (Equation (2)) was used to model the results of these …

The fine fraction, as shown in Figure 18, is processed with low-intensity magnetic separation to achieve a magnetite concentrate and its tailings is processed with SLon pulsating high-gradient magnetic separators as shown in Figure 19 to achieve a hematite concentrate. These two concentrates are combined and upgraded in a reverse flotation ...

Up to now, various methods have been reported in the literatures on the preparation of hematite nanoparticles, such as the hydrolysis method [10,11], the hydrothermal treatment [12][13][14], the ...

Based on previous investigations, SPS is considered as a low-cost collector with great low-temperature flotation capacity. SPS is a sodium sulfonate of a mixture of alkanes with different chain length, with a structural formula of RSO 3 Na (R is alkyl, cycloalkyl, or alkyl aryl). One of a general production method is using sulfonating agent …

Commonly, magnetization roasting technology is applied to iron ores with weak magnetic properties (hematite, limonite, etc.), and these weak magnetic iron ores …

The purities of hematite, quartz, and magnetite were 97.3%, 99.4%, and 93.8%, respectively. Elemental compositions of minerals are shown in Table 1.Total iron and ferrous iron contents were determined with the standard titrimetric method using potassium dichromate as titrant after reduction of the iron (III) by tin (II) chloride and/or …

The de-NOx efficiency is improved. Therefore, properly doping Ce on the LaMnO3/hematite can further improve its low temperature catalytic activity, and the catalyst La0.8Ce0.2MnO3/hematite can ...

Now we know that hematite is a canted antiferromagnet7 with a spontaneous magnetization that is much lower than that of the more … See more

The results show that solid naphthalene (Nap) is easy to crystallize at low temperature and adhere to the surface of the flotation concentrate, resulting in a decrease of filtration velocity ...

A normal-temperature short-process collecting agent for hematite reverse flotation comprises, by mass, 0-60% of sodium lignin sulfonate, 35%-90% of acid oil and 5%-20% of polyoxyethylene-polyoxypropylene block polyether. The structural formula of the polyoxyethylene-polyoxypropylene block polyether is shown in the specification, wherein …

Materials. Pure quartz (> 99% SiO 2) and magnetite (> 96% Fe 3 O 4) samples (Fig. 1) were obtained from VWR, Sweden.The samples were ground using a laboratory-scale ball mill to produce flotation feed

Combined with the existing data, the most commonly found fluorite flotation collector is the fatty acid, in particular sodium oleate. Still, the low-temperature resistance and low water solubility limit its application. The modified oleic and its derives via halogenation, sulfonation, sulfate, etc., can improve fluorite flotation.

Hematite ore's magnetic characteristics were significantly impacted by magnetizing roasting. By selectively magnetizing roasting, hematite is transformed into magnetite. With an Fe grade of 65.25% at a recovery value of 72.5% in the concentrate, magnetic separation produced the greatest result for Fe.

The invention relates to a hematite reverse flotation inhibitor and a preparation and use method of the hematite reverse flotation inhibitor. The hematite reverse flotation inhibitor is prepared by waste residues generated in the beer brewing process, potassium permanganate, sodium hydroxide and water, and according to the weight ratio of all the …

Developing hematite collectors that are effective at normal and low temperatures is one of the pivotal approaches to optimizing the hematite flotation reagent system enhancing …

Article Recommendations. ABSTRACT: Present investigation includes the magnetizing roasting of low-grade iron ore fines followed by grinding and beneficiation using …

Therefore, the current high energy consumption in the beneficiation process of hematite has aroused the attention of scientific researchers, especially the high temperature requirement of the flotation pulp, generally 35 ° C ~ 45 ° C, heating the pulp needs to consume a lot of steam, according to calculations per ton The average heating cost of …

Reverse cationic flotation is currently the main processing technique for upgrading fine hematite from silicates. Flotation is known as an efficient method of …