CN103990540B

CN103990540B - Differential beneficiation quality-improving method for feldspar mineral

Info

Publication number: CN103990540B
Application number: CN201410163405.7A
Authority: CN
Inventors: 张成强; 冯安生; 郝小非; 胡宏杰; 李珍
Original assignee: Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS
Current assignee: Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CAGS
Priority date: 2014-04-23
Filing date: 2014-04-23
Publication date: 2016-05-25
Anticipated expiration: 2034-04-23
Also published as: CN103990540A

Abstract

The invention provides a sorting method for differentially sorting and purifying feldspar mineral, which is characterized in that according to the natural characteristic of uneven embedded particle size of the feldspar mineral, raw feldspar mineral is divided into two grades in a coarse grinding state, the quality difference exists between the two grain grades, the iron content of the coarse grain grade is low, the iron content of the fine grain grade is high, the high-quality ore concentrate is sorted from the raw feldspar mineral with higher quality grade by adopting a simple and practical method, and after the ore mud is removed from the raw feldspar mineral with relatively lower quality grade, the raw feldspar mineral with relatively lower quality grade is sorted by adopting a flotation method suitable for removing impurities from fine grains, so that the feldspar mineral concentrate with relatively lower quality is obtained. The method fully utilizes the characteristic of natural heterogeneity of the minerals, has the characteristics of simple process, good product quality, high product value, high recovery rate, small environmental pollution, energy conservation, consumption reduction and the like, and is suitable for purifying feldspar ore with high iron content and slightly coarse embedded particle size of the feldspar ore.

Description

A kind of differential ore dressing method for upgrading of spectra

Technical field

The invention belongs to and belong to comprehensive utilization of resources field, relate to a kind of differential ore dressing method for upgrading of spectra.

Background technology

Feldspar is a kind of potassium frame shape structure silicate mineral that contains, and melting is long interval time, and chemical stability is good, the raw material of the industry such as making glass, pottery, chemical industry, grinding materials and grinding tool, glass fibre, welding rod that is widely used; Feldspar raw material has accounted for ceramic glaze, polished bricks, the more than 50% of the whole composition of raw materials of sanitary china, and feldspar material quality directly affects the credit rating of pottery and glass product. The technical indicator of evaluating feldspar product quality is mainly Fe content and K₂O、Na₂The content of O. In the production of white glass, the iron in raw material can produce harmful effect to the light transmittance of glass and color; In Production of Ceramics, iron easily makes product surface produce stain, molten scar and fusion hole.

China's feldspar resource is extremely abundant, is mainly distributed in 23 provinces and regions such as Anhui, the Inner Mongol, Heilungkiang, Xinjiang, Sichuan, be widely distributed, but mainly taking middle quality ore deposit as main. The at present utilization of China's feldspar is mainly adopted richness and is abandoned poorly, and to exploit, iron-holder is low, K₂O、Na₂The high high-quality potash feldspar ore of content of O is main, and the rational exploitation and utilization of the low-quality feldspar ore that iron-holder is high does not cause enough attention, and major part is untapped utilization all, becomes " dull " resource. Therefore, feldspar iron-removing purification is the problem that everybody studies for a long period of time.

At present, the method for feldspar iron-removing upgrading roughly has washup, magnetic separation and flotation. Washup is applicable to originate from the feldspar of weathered granite or feldspathic placer, is mainly to remove the ironys such as clay, thin mud and sericite to pollute; Be the feldspar ore of fine-grained disseminated grain for iron-bearing mineral, flotation is topmost method for removing iron, and it is normally 3～4 o'clock in pH value, first uses amine collector floatation on mica, is then 4～5 use Sulfonates collecting agent flotation iron-bearing minerals at pH; Magnetic separation is a kind of method that feldspar iron-removing is conventional, due to the iron mineral magnetic in feldspar a little less than, only have the high intensity magnetic separation of employing equipment just can obtain good separating effect, feldspar iron removal by magnetic separation technique has dry type and two kinds of flow processs of wet type. Dry type magnetic separation deironing is mainly used in coarse granule and throws tail and coarse fraction feldspar powder (more than 150 orders), and product specification is lower, and equipment for removing ferric ion has permanent magnetic roll type magnetic separator, permanent-magnet drum type magnetic separator and various dry type tramp iron separator. Wet magnetic separation is mainly used in fine fraction feldspar iron-removing, good iron removal effect, and product specification is high, and wet magnetic separation equipment mainly contains permanent magnet high gradient magnetic separator and electromagnetism high gradient magnetic separator at present.

Above-mentioned traditional feldspar iron-removing process for upgrading is all the dissociation degree of emphasizing between mineral, the carrying out processing that feldspar ore itself is not added to differentiation is processed, emphasize broken all ore deposits being milled under same granularity state to carry out sorting purification, and ignored the natural inhomogeneities between spectra itself. A large amount of research discoveries, spectra is under corase grind state, and through classification, between the feldspar ore of size fractionated, quality differential is larger, and the quality of feldspar exists granularity poor.

Summary of the invention

For the defect of prior art, the present invention proposes a kind of differential ore dressing method for upgrading of spectra, be exactly according to the physical feature of spectra disseminated grain size inequality, feldspar ore is divided under corase grind state to two ranks, between each grade, there is the difference in quality, then adopt different sorting process, the feldspar raw ore of the higher grade of purity, adopt simple and practical way to sort out the concentrate of high-quality, the feldspar raw ore of the relatively low grade of purity is processed separately, sort out more inferior feldspar concentrate, the object developing to reach resource high-efficiency, improve to greatest extent resource utilization and economy, social benefit, in order to achieve the above object, the present invention is achieved by the following technical solutions: be crushed to after the feldspar raw ore corase grind of certain particle size, ore milling product is classified into two samples, the feldspar concentrate of the thick rank part high-quality that directly the simple high intensity magnetic separation process of employing obtains, and first carry out after desliming adopting traditional technique to sort for fine fraction part, it is characterized in that: for (1), by feldspar raw ore, the product after ball mill corase grind carries out classification to its processing step, obtains being greater than 150 orders and is less than two kinds of samples of 150 order, (2) adopt Wet-type strong magnetic separator to carry out iron removal by magnetic separation to being greater than 150 order samples, obtaining nonmagnetics is the feldspar concentrate product 1 of high-quality, and Magnetic Materials abandons as mine tailing, (3) to being less than after 150 order sample deslimings, adopt the method for flotation to remove the impure mineral such as mica, red (brown) iron ore, obtain the feldspar concentrate 2 of certain quality, thin mud and flotation tailing abandon as mine tailing, in described step (1), ore milling product is divided into the sample of two ranks of thickness, and the quality of these two samples has very large difference, be greater than 150 order sample iron-holder lower, and the iron-holder that is less than 150 order samples is very high, thereby character and product qualitative difference make the mineral of size fractionated adopt different technique to carry out sorting, in described step (2), being greater than 150 order coarse fraction samples adopts simple and practical single high intensity magnetic separation process to obtain the feldspar concentrate product of high-quality, in described step (3), carry out after desliming being less than 150 order samples, adopt the floatation process that is suitable for particulate removal of impurities to remove iron mineral, obtain meeting the concentrate product of certain feldspar quality requirement.

Beneficial effect

Beneficial effect of the present invention is, according to the natural quality of the natural uneven distribution of feldspar ore, under corase grind state, be divided into the sample of different qualities by simple hierarchical approaches, then adopt different ore dressing treating methods according to its characteristic, thereby make sorting mineral more reasonable. Can under the condition that does not increase Environmental costs and low production cost, effectively improve spectra added value, the potential greatest benefit of performance resource, have technique simple, good product quality, value of the product is high, the rate of recovery is high, environmental pollution is little, the feature such as energy-saving and cost-reducing.

Brief description of the drawings

Fig. 1 is process chart of the present invention.

Detailed description of the invention

Embodiment 1

Yiyang, Henan feldspar ore, the essential mineral in ore has microcline, plagioclase, albite, quartz and mica mineral, and metalliferous mineral is mainly limonite, bloodstone etc., di-iron trioxide (Fe in raw ore₂O₃) content 0.71%.

(1) get 300 grams of stone-2mm feldspar raw ores and carry out ore grinding, the fineness (200 order content) of ore milling product is 35% left and right, adopts 150 mesh standard sieves to sieve, and on sieve, productive rate is 48.27%, oversize Fe₂O₃Content is 0.32%, and the lower productive rate of sieve is 51.73%, undersize Fe₂O₃Content is 1.02%.

(2) right+150 order samples directly adopt slon pulsating high gradient intensity magnetic separator to carry out iron removal by magnetic separation, can obtain operation productive rate 96%, Fe₂O₃Content is 0.13% feldspar concentrate product.

(3) p-150 order samples remove thin mud by the mode of hydraulic classiciation, adopt 075L flotation cell to carry out flotation, under alkali condition, adopt 731 and petroleum sodium sulfonate hybrid collector carry out Removal of iron with flotation, can obtain operation productive rate 81%, Fe₂O₃Content is 0.17% feldspar concentrate product.

(4) finally can obtain productive rate is that 87.98%(is with respect to raw ore), Fe₂O₃Content is the feldspar concentrate product that is less than two kinds of different qualities of 0.2%.

Claims

1. a differential ore dressing method for upgrading for spectra, is characterized in that: for (1), by feldspar raw ore, the product after ball mill corase grind carries out classification to its processing step, obtains being greater than 150 orders and is less than two kinds of samples of 150 order; (2) adopt Wet-type strong magnetic separator to carry out iron removal by magnetic separation to being greater than 150 order samples, obtain nonmagnetics feldspar concentrate product 1, Magnetic Materials abandons as mine tailing; (3) to being less than after 150 order sample deslimings, adopt the method for flotation to remove mica, red (brown) iron ore impure mineral, obtain feldspar concentrate 2, thin mud and flotation tailing abandon as mine tailing.

2. the differential ore dressing method for upgrading of a kind of spectra according to claim 1, it is characterized in that: the sample that in step (1), ore milling product is divided into two ranks of thickness, and the quality of these two samples has very large difference, be greater than 150 order sample iron-holder lower, and the iron-holder that is less than 150 order samples is very high, thereby character and product qualitative difference make the mineral of size fractionated adopt different technique to carry out sorting.

3. the differential ore dressing method for upgrading of a kind of spectra according to claim 1, is characterized in that: in described step (2), be greater than 150 order coarse fraction samples and adopt simple and practical single high intensity magnetic separation process to obtain feldspar concentrate product 1.

4. the differential ore dressing method for upgrading of a kind of spectra according to claim 1, it is characterized in that: in described step (3), carry out after desliming being less than 150 order samples, employing is suitable for the floatation process of particulate removal of impurities and removes iron mineral, obtains meeting the concentrate product 2 of feldspar quality requirement.