Antimony ore beneficiation methods, in addition should be based on the type of ore, mineral composition, minerals, etc. Pot insert configured and physical and chemical properties as the basic conditions to select, it should consider the content of valuable components and adapt to metallurgical technology, and antimony Final economic benefits and other factors.
The ore beneficiation method includes hand selection, re-election, heavy medium selection, and flotation.
The hand selection is carried out by using the difference in color, gloss and shape of the strontium-containing minerals and gangue in the strontium ore. Although the method is original and labor intensive, it is still of special significance for the beneficiation ore dressing: because the niobium minerals are often produced by coarse monomer crystals or massive aggregate crystals, the hand can often obtain blocks with higher grades. Antimony concentrate is suitable for the technical requirements of the vertical roaster in the metallurgical plant. Hand selection can reduce the cost of ore dressing and energy consumption, so it is widely used in China. According to statistics: Among the 18 major miners selected in China, there are 15 hand-selected operations, accounting for 83.3%, of which 4 are single sulphide ore sulphide or 4 sulphide-oxidized mixed bismuth ore. There are 7 complex polymetallic ore mining plants.
The selected block bismuth concentrate can be directly volatilized and calcined in a vertical roaster to contain bismuth trioxide. The hand-selected massive strontium sulfide concentrate containing more than 45% bismuth can be obtained by the melting method to obtain pure bismuth trisulfide (commonly known as oyster) for use in arms production.
In addition to picking up high-grade block-shaped antimony concentrates, it is also possible to directly discard a large amount of waste rock to improve the grade of selected ore.
The ore size suitable for hand selection is mostly between 28 and 150 mm. Most of the selection plants use wide-ranging hand selection, and only a few selected factories, such as the tin mine north selection plant, use a narrow-level hand selection. Because the ore is often muddy, the washing operation is often an indispensable preparatory work before the selection. The selected ore is washed and then hand-selected, which is better than direct washing without washing.
Hand-selection is usually done on the hand-selected belt in the concentrator, but there are also many 锑 mines that are completed in the pit or in the pit.
Re-election is applicable to most niobium ore dressing plants because niobium minerals are minerals with high density and coarse grain size and are easily separated from the gangue by re-election methods. Among them: the density of stibnite is 4.62 g/cm 3 , and the density of gangue is between 2.6 and 2.65 g/cm 3 , and the ratio of equal sinking (falling) is 2.19 to 2.26, which is an easy ore; the density of Huanghuahua is 5.2.克/cm 3 , the density of red sorghum is 7.5 g/cm 3 , and the thickness of 锑 为 is 5.57 g/cm 3 , and their equal sinking (falling) ratios to gangue are 2.55 to 2.63, 3.93 to 4.06 and 2.76 to 2.86, respectively. The three types of antimony ore belong to the highly selectable ore sorted by density. Only mink calcium, the stone density is 3.14 g/cm 3 , and the ratio of sinking (falling) to gangue is only 1.29. It is classified as difficult to ore by density, but it is not the main component in the ore, and does not affect the weight. Selected use. In short, whether a single sulphide ore or sulphide (oxidized mixed yttrium ore) has good re-election conditions, and the cost of re-election is low, and a large number of qualified coarse-grain concentrates can be sorted in a relatively coarse particle size range, and Discarding a large number of gangues, therefore, re-election is still the method of beneficiation that today's smelting workers are willing to adopt. Sometimes, even if it cannot directly select qualified bismuth concentrates, it is often accepted as a pre-selection operation for sputum flotation operations. In particular, flotation is difficult to deal with cerium oxide ore at this stage, and thus it has been re-elected as the main beneficiation method for cerium oxide ore.
Heavy medium ore dressing is often used as a pre-selection operation for strontium ore. Practice has proved that in addition to strontium ore containing crystal structure, heavy medium dressing can be used.
Difficulties in heavy media beneficiation are the selection of weighting agents, the preparation and recovery of media. A substance used as weighting agents, practice shows that: Grinding Wheel Yu scrap steel (iron silicon) is ideal. The material has a magnetic content of 70-98%, and the chemical composition is mainly silicon and iron. After being finely ground to less than 74 micrometers and 98% after the mineralizer preparation system, the weighting agent is kept at a density of 2.65 g/cm3. It is entirely possible and easy to recycle.
Flotation is the most important beneficiation method for selecting minerals. Barium sulfide minerals are easy-floating minerals, and most of them use flotation methods to increase the ore crystal position. Wherein: the first stibnite often used as the activator of lead salts, copper salts or lead salts are also useful to use either of a copper salt, followed by flotation collector. Commonly used collectors are diphtheria or shale oil and ethyl sulphide, the foaming agent is pine oil or No. 2 oil; cerium oxide ore is a difficult ore.
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