Antimony ore dressing technology

Hand selection

The picking process of strontium ore is carried out by using the difference in color, gloss and shape of strontium-containing minerals and gangue in 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 ore, antimony suited to the technical requirements of metallurgical plant vertical roaster; hand-selected to reduce energy consumption and mineral production costs, 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%, including 4 single-sulphide antimony ore dressing plants and 4 vulcanization-oxidation mixed antimony ore dressing plants. 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 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.

Re-election

The re-election process of strontium ore is suitable for most strontium ore selection plants, because strontium minerals are minerals with high density and coarse grain size, which are easy to separate from gangue by re-election method. Among them: the density of stibnite is 4.62 g/cm3, and the density of gangue is between 2.6~2.65 g/cm3, and the ratio of equal sinking (falling) is 2.19~2.26, which is an easy-selected ore; the density of Huanghuahua is 5.2.克/cm3, red enamel density is 7.5 g/cm3, 锑华为5.57 g/cm3, and their equal sinking (falling) ratios are 2.55~2.63, 3.93~4.06 and 2.76~2.86, 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, which is difficult to sort by density, but it is not the main component in the ore, it 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 re-election cost 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.

Flotation

Flotation is the most important extraction method for strontium 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.

Rotary Switch Food Blenders

Rotary Switch Food Blenders