SU1546154A1 - Method of dressing feldspars - Google Patents

Abstract

The invention relates to the enrichment of quartz-feldspar raw material of complex composition and can be used in the enrichment of ceramic pegmatite ores. The goal is to improve the quality of feldspar concentrates / PShK /, increase the recovery of potassium oxide in potassium PShK and the recovery of sodium PShK. The ore is crushed in the presence of reagents. Then, screening and isolation of the biotite product and the rough concentrate are carried out. After that, the ore is subjected to drying, screening, grinding and re-extraction of the biotite product. Then, preheating electrification (PE) is carried out and the feldspar product (FHP) is separated from the quartz by electroseparation. The resulting PNP is subjected to magnetic separation in order to isolate iron and magnesium-containing minerals, which reduce the quality of the concentrates. The non-magnetic product is ground to a particle size of 0.5 mm to expose the intergrowth. Then re-PE and re-electro-separation is carried out for more complete extraction of quartz. The obtained PNP is subjected to PE in the presence of a reagent. Conducted PE at 80-100 ° C. Salicylic acid is used as a reagent at a concentration of 0.2 ^. 10 ^-3 to 0.45 ^. 10 ^-3 kg / m. When this happens, selective adsorption of salicylic acid sublimation products on the microplate occurs. This results in contrasting charging of the minerals to be separated. Thereafter, electro-separation is carried out to produce potassium and sodium feldspar. Electrical separation

Description

This invention relates to the enrichment of quartz-feldspar raw material of complex composition, in particular, the enrichment of ceramic pegmatite ores.

The aim of the invention is to improve the quality of feldspar concentrates, increase the extraction of oxide

potassium to potassium feldspar concentrate and extraction of sodium feldspar concentrate.

In the process of enrichment of feldspar, consisting in their crushing in the presence of reagents, pre-screening, biotite product separation, drying, screening, grinding, re-separation of a bite-titanium product, preheating electrification, electrical separation with separation of quartz, the resulting feldspathic product is subjected to magnetic separation with In order to isolate iron and magnesium containing minerals that reduce the quality of concentrates, a nonmagnetic product is reduced to a particle size of minus 0.5 mm in order to reveal intergrowth, t water re podogrev- electrification to increase the contrast in the charge rows on quartz and feldspars to efficiently performing retransmission for producing feldspathic elektroseparatsii product containing less than 12% free quartz. The feldspar product obtained is subjected to preheating-electrification at 80-100 ° C with simultaneous treatment with salicylic acid from 0.2-10 to 0.45-10 kg / kg, during which selective adsorption of the sublimation products of salicylic acid on the microcline occurs, which leads to a contrast charge separation of minerals. Then, the electrified material is subjected to electroseparation at a field strength of 2.7–10 to 4–10 B / m, as a result of which the negatively charged microcline particles are concentrated in the potassium polespat concentrate, the positively charged particles of plagioclase in the sodium poleshpat concentrate, and uncharged particles are in the form of a quartz – feldspath concentrate (industrial product).

Salicylic acid is used as a reagent, adsorption of its sublimation products leads to inversion of the sign of triboelectricity charge on the surface of potassium feldspar, while the sign of charge on the surface of sodium feldspar remains unchanged.

Primer p. The resulting feldspar product is subjected to magnetic separation with a magnetic field strength of 1350 kA / m and the non-magnetic fraction is reduced to a particle size less than 0.5 mm. Then reheat electrification is performed at 100-120 for 2-3 minutes, re-electroseparation at an electric field strength of 2.740 V / m.

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With this electric field strength, a high-concentration concentrate with a module of 3.0 is obtained. In this case, a minimum yield of the intermediate product is also obtained, and the maximum value is extracted and potassium oxide in a high potassium concentrate.

Separating up to 95% of free quartz from ceramic pegmatites improves the quality of the separation of potassium and sodium feldspars, thereby obtaining high-quality concentrates.

Preliminary electroseparation of more than half of free quartz allows to reduce the cost of a more energy-intensive grinding operation, to realize the principle: do not crush the excess.

This set of operations makes it possible to remove restrictions on the degree of dilution by the host rocks, to improve the quality of feldspar concentrates, to increase the recovery of potassium oxide, and to obtain a new product — sodium feldspar concentrate — from virtually any composition of ceramic pegmatites.

The proposed method allows increasing the extraction of potassium oxide into high potassium feldspar up to 50% and obtaining sodium feldspar and quartz concentrates from the main types of ceramic pegmatites, regardless of the degree of dilution of the latter by host rocks. The efficiency of the method is increased due to the fact that less than 80% of the original ore is fed to the grinding up to 0.5 mm, and after quartz is extracted, 1.6-1.8 times less ore is fed to the reagent processing.

Claims (4)

1. A method of enriching feldspar, including crushing in the presence of reagents, pre-screening, isolation of a biotite product and a rough concentrate, drying, screening, grinding a rough concentrate, re-separating a biotite product, heating electrification, electroplating the remaining product to produce a feldspar product and quartz , characterized in that, with a view to raising quality of feldspar concentrates, increase of extraction of potassium oxide into potassium feldspar concentrate and extraction of sodium feldspar concentrate, the resulting feldspar product is subjected to magnetic separation with obtaining magnetic and non-magnetic fractions with subsequent grinding of non-magnetic fraction to 0.5 mm size, its reheating- electrification, re-electroseparation, with the production of feldspar product and quartz, heating-electrification of the feldspar product obtained by after re-electroseparation with simultaneous treatment with a reagent and electrical distribution of feldspar products J5 461546 after its last preheating-electrification with separate production of potassium and sodium feldspathic concentrates. 2. Method by software. 1, about tl and h a rout and so that heating-electrification with simultaneous treatment with a reagent is carried out at 80-100 ° C. 3. A method according to claim, characterized in that salicylic acid is used as a reagent at a concentration of from 0.2 -10 to 0.45 x 10 kg / kg. 4. A method according to claim. Characterized in that the last electro-separation is carried out at a field strength of 2.7-10 to 4-10 V / m.