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%, 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 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. Wherein: stibnite a density of 4.62 g / cm 3, while the gangue density between 2.6 and 2.65 g / cm 3, which like sink (down) ratio of 2.19 - 2.26, is easily ores; Huang antimony Chinese density of 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 2.55~2.63, 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, 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 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.
Heavy medium ore dressing is often used as a pre-selection operation for strontium ore. The practice proves that in addition to the strontium ore containing the crystal structure, heavy medium beneficiation 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 of the magnetic substance content of 70 to 98%, the chemical composition is mainly silicon and iron, preparation of the medium through the concentrator system and ground to less than 74 microns was made after 98% of the weighting agent, the density of the medium is maintained at about 2.65 g / cm 3 It is completely 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. [next]
Single flotation ore uses a single flotation process; vulcanization-oxidation mixed strontium ore is re-elected for coarse granules, and granules are combined by flotation or re-election-flotation. Flotation treatment of oxidized ore is more difficult. When the cerium oxide content exceeds 10~20%, the bismuth metal is often directly subjected to reduction smelting without beneficiation; and the fine granule embedded oxidized ore or refractory oxidized ore can be reduced to metal ruthenium and then floated. Selection process. The method comprises the steps of: adding a chlorinating agent in the presence of a solid reducing agent, heating to generate a complex chlorination reduction, and causing the volatile chlorinated chloride in the ore to precipitate from the mineral lattice and adsorbing to the reducing agent coal. On the grain. Hydrogen produced by the separation reaction reduces ruthenium chloride to metal ruthenium. Such metal crucibles are easy to float, can be ground and floated by conventional flotation methods, such as the tin mine north selection plant.
For antimony-containing complex multi-metallic minerals, frequently with heavy non-ferrous sulfide o'clock: arsenopyrite FeAsS, realgar AsS, As2S3 Orpiment arsenic-containing sulfide minerals; galena lead sulfide minerals and the like; zinc sulfide minerals such as sphalerite ; cinnabar mercury-containing sulfide minerals and the like. Oxidized minerals with significant economic value, such as cassiterite, scheelite , etc., are also associated with precious metal minerals such as natural gold. Therefore, it is necessary to test the comprehensive recovery problem during mineral processing. The description is as follows:
(1) Recycling of cassiterite oxidized ore, which can be recovered by re-election-flotation-re-election process: first use re-election (or heavy medium selection) to lose part of tailings, to obtain coarse concentrate, and then grind The whole flotation has a mixed concentrate containing cassiterite and stibnite. After classification, the coarse particles are re-selected to recover cassiterite. The fine granules are then separated by flotation to separate bismuth and tin (first floatation and then cassiterite), and the whole flotation tail The mine also contains cassiterite, which is also recycled by re-election, such as the Guangxi Changchang Changpo Plant.
(2) Recovery of scheelite The scheelite is also an oxidized ore, and a combined process of re-election flotation can be employed. The coarse-grained inlaid part of the ore is recovered by re-election, and the fine-grained inlay is partially ground and floated (gold), then the scheelite is floated. It is also possible to recover tungsten from the raft (gold) tailings by re-election. Such as Hunan Xiangxi Woxi 锑 selection plant. The flotation scheelite of the plant adopts alkaline pulp, the temperature is 20~25°C, and sodium carbonate, water glass and oleic acid are used as flotation reagents, and the dosages are 1800-2200, 600-800 and 140-180 g/ton respectively.
(3) Recovery of arsenic (gold) minerals The arsenic (gold) minerals are roughly similar to the sulphide ore. There are two technical solutions for recovering associated arsenic (gold) minerals from stibnite:
First, at pH=6.5, copper sulfate and lead nitrate are used as activators, black medicine and xanthate are used as collectors, and cesium and arsenic (gold) mixed flotation are carried out. The mixed concentrate is adjusted with sodium carbonate and sodium sulfide. The pulp pH is 11, and the arsenic (gold) is suppressed, which achieves the separation of bismuth and arsenic (gold). Such as Hunan Xinshao Longshanyu Plant and Guizhou Sandu Miaolongtun Plant.
Secondly, the use of butylammonium black drug as a collector can achieve the separation of arsenic and arsenic, because the drug has weak absorption performance for arsenopyrite, and has strong absorption performance for stibnite, which can be used as a collector. The effect of arsenic (gold) floating rafts. Such as Hunan Taojiang Banxijing Plant and Taojiang Yulihe River Selection Plant.
(4) recovering cinnabar method is to use Pb 2+ ion activation, antimony minerals mixed concentrate and flotation of minerals mercury, chromium, potassium and added weight to suppress floating cinnabar stibnite, because potassium dichromate capable of stibnite Hydrophilic PhCrO 4 film is formed on the surface of the mineral, so that the fluorene mineral can be floated and deteriorated, and the flotation is blocked, so as to achieve the separation of mercury. China Mining and Metallurgy Research Institute as white silver Wangxiu Yao and others on a large antimony mercuric sulfide deposits in China's Shaanxi Province.
With higher automation and intelligence, stationary Concrete Batching Plant belongs to compulsory concrete Batching Plant. The Concrete Mixing Plant can adopt combined feeding according to customers` need to produce dry-hard, plastic and any ratio concrete, it also can realize secondary mixing, which can greatly improving the concrete quality. The cement concrete batch plant enjoys the advantages of great exterior, friendly environment protection, high productivity and so on. It mainly applies to medium-large construction site, hydroelectric, highway, port, bridge, airport and commodity concrete, pipe,precast and so on. The concrete batching plant adopt double horizontal shaft compulsory mixer,it can improve the mixing efficiency highly. With advanced concrete batching plant control system, the control system can be designed as semi-automatic or fully automatic models, which can meet different requirements from different customers.
Concrete Batching Plant
Concrete Batching Plant,Concrete Plant,Batching Plant,Concrete Mixing Plant
Shandong Shenghuai Trading Co., Ltd. , https://www.shinebatchplant.com