First, commonly used collector Industrial use of cassiterite collectors are mainly fatty acids, swollen acid, alkyl hydroxamic acid, alkyl sulfosuccinic acid, phosphonic acid 5, oleic acid, benzyl sulphonic acid, A-22, salicylox Acid is a commonly used collector. (1) Fatty acid collectors This is a common collector flotation agent for oxidized ore, titanium oxide ore recovered in the iron ore, diamond ore zinc has been widely used. Oleic acid is the most common fatty acids in a collector, which collector received strong ability, the amount is small, non-toxic, but poor selectivity for Fe 3 +, Ca 2 + sensitive to iron minerals, fluorite, calcite It has a strong ability to collect and is generally used for flotation of cassiterite- quartz type slime under neutral or alkaline conditions. Aliphatic phosphoric acid collector suitable for free Fe 3 + and Pb 2 + ore flotation, generally in an amount of 1000 ~ 1500 g / t, pH optimum value is between 2.55 to 3.50. (2) Tannic acid collector Tannic acid is classified into aromatic tannic acid and aliphatic tannic acid, and is a more effective collector. Arsenic is preferably an aromatic acid flotation in acid medium, but toxic, harmful. The order of the ability to collect fine-grained cassiterite is: mixed tolonic acid > p-toluene acid > benzyl decanoic acid > o-toluene citrate; in weakly acidic and neutral pulp, mixed toluene citrate flotation tin Stone works best. Use it flotation gold mud containing tin sulfide minerals, to avoid the influence of sludge, desliming be pre-processed, and to avoid the influence of tin sulphide concentrates on the quality, to be pre-desulfurization. The use of Y89 xanthate desulfurization to the bismuth polymetallic sulfide ore is better, and the sulfur removal effect is better, which creates conditions for the flotation of cassiterite. Aliphatic citric acid is a good collector, which can react with metal ions such as Sn 2 + , Sn 4 + and Fe 3 + to form poorly soluble compounds. When the concentration is high, it can react with Ca 2 + and Mg 2 + to form salt. The ore processed by the Barry Plant is a cassiterite polymetallic sulfide ore. The sulfide minerals include iron sphalerite, pyrrhotite, arsenopyrite, etc., and the gangue minerals are quartz and calcite. The flotation of cassiterite is sulfuric acid, benzyl arsenate, P86, sodium carboxymethylcellulose and No. 2 oil, which can increase the concentrate grade by 4.68% before the improvement of the pharmaceutical system. (c) alkyl hydroxamic acid These collectors are more selective than fatty acids and less toxic than arsenic acids, but their ability to capture is relatively weak, large in dosage, and high in price. Under the premise of achieving the same effect, they are generally used to replace arsenic acid. Collecting agent. The most commonly used alkyl hydroxamic acid is salicyl hydroxamic acid. In the weakly alkaline medium, TBP has a strong trapping effect when used as an auxiliary collector. In 1999, when the Chehe Concentrator improved the collector, the new combination of salicyl hydroxamic acid and P86 was used instead of the swelling acid collector. As a result, the recovery rate of the cassiterite operation was increased by 2.24%, and the enrichment ratio was improved. It is 0.5 times and the dosage is half of the original collector, which greatly reduces the production cost. In 2003, Zhu Jianguang experimented with the ore samples from Chehe, and proved that 1-hydroxy-2-naphthoquinone (H 203 ) and its isomer 2-hydroxy-3-naphthoquinone (H 205 ) is a good collector of cassiterite. Among them, H 205 can obtain tin saponin with a grade of 18.29% and a recovery rate of 92.68% from the closed-circuit test of ore feeding with particle size less than 11μm and 76% and tin grade of 1.16%. mine. (4) Alkylsulfonated succinic acid collectors These medicinal agents have strong harvesting capacity, low dosage, low price, non-toxicity and short duration of action with minerals. They are widely used in cassiterite flotation plants in Bolivia, the United Kingdom, the former Soviet Union and Peru. Sulfonated carbamide acid has a better flotation effect on coarse-grained cassiterite and is the most widely used. Flotation of cassiterite with sodium sulfosuccinate, the amount is generally 500-800g / t, pH is 3.5-4.3, adding Aqua-mollin BC (ethylenediaminetetraacetic acid tetrasodium salt) complex high-iron ion and water glass dispersion Fine-grained gangue particles can obtain better flotation indicators. Sulfobinic acid has good collection performance for fine-grained cassiterite, low dosage, fast flotation speed, but poor selectivity, and is suitable for use in acidic medium. The same kind of agent also has sulfosuccinic acid (N-octadecylsulfonated succinamide disodium salt, domestic code A-18), A-22,209 detergent and the like. A-18 is both a cassiterite collector and a slime dispersant. It has foaming properties and has a catching effect on sulphide ore. A-22 is suitable for application in weakly acidic medium, with strong harvesting ability, low dosage, fast action, no toxicity, and the best effect when pH is around 6. (5) Linnic acid collector Phosphonic acids are classified into aromatic phosphonic acids and aliphatic phosphonic acids. The aromatic phosphonic acid has strong ability to capture and select good cassiterite. Styrylphosphonic acid is more commonly used, its harvesting capacity and selectivity are better than oleic acid. It can be used in weak acid and neutral pulp. It has good index and low price. It can be used for flotation of cassiterite, wolframite , rutile, etc. . The industrial test of styrene-phosphonic acid flotation of Huangmaoshan tin-containing fine mud has achieved good results. The grade of tin concentrate is 24.26%-26.4%, and the recovery rate is 44.79%~52.14%. Aliphatic phosphonic acids (C 6 ~ C 8) strong collecting capability, with less weak selectivity for Ca 2 +, Fe 3 + sensitive, not sticky and froth concentrate is easily dispersed, it can be weakly acidic and neutral Flotation in the slurry. Second, other types of catching Alkyl phosphate collectors are less toxic, generally have good collection and selectivity, and have good resistance to hard water in weakly alkaline media and at room temperature. A tin ore selection plant in India uses alkylphosphonate as a collector, sodium silicate as an inhibitor, sulfuric acid and citric acid as a pH adjuster. After a coarse and two fine flotation, the tin mass fraction is 0.24%. A tin concentrate with a grade of 7% and a recovery rate of 55% was obtained from the re-selected tailings. Alkyl sulfate sodium salt (C 12 ~ C 20 "for collecting capability than oleic cassiterite weak, selective collecting capability of brass ore, pyrite collectors weak, calcium-containing minerals The selectivity is good, and the general dosage is 20-30 g/t. Amine collectors are preferred collectors for sulphur flotation, which include primary amine salts, secondary amine salts, tertiary amine salts, quaternary ammonium salts and alkyl pyridinium salts, of which primary amine salts are widely used. Tongtieling has better ability to capture cassiterite than methotrexate. The use of copper iron spirit floatation of cassiterite fine mud can obtain better indicators, but because of the large amount, it is often mixed with benzoic acid, and the synergistic effect of the two agents can be used to reduce the dosage and obtain a good float. Selected indicators. Third, the new type of capture Although there are many kinds of existing traps, there are still some problems, such as high cost, polluted environment, and difficult processing of fine-grained grades. Therefore, in recent years, many new collectors have been developed at home and abroad, such as ZJ-3, BY. -9, CF, SR, etc. ZJ-3 is a successful new collector for Zhu Yimin and other research constitutions. The agent is highly toxic and low-toxic, and is suitable for treating fine-grained cassiterite having a degree of less than 19 μm. ZJ-3, auxiliary collector TBP and inhibitor CMC were selected by Chehe Plant for a coarse, two-precision and one-sweep flotation. The grades were selected from the ore with a mass fraction of 1.16%, and the grades were recovered by l8, 29%. Rate 92. 68% tin concentrate. BY-9 is a chelating collector of cassiterite, Ren Jizhen, etc., and recovers tin from flotation of cassiterite polymetallic sulphide ore tailings. By comparing the flotation effects of BY-9, C9 hydroxamic acid and Sun 2#, BY-9 has the best collection effect, and the dosage is 1000g/t. Adding 100 g/t of the effective promoter P86 for collecting cassiterite and 50-100 g/t inhibitor BY-5 and 50 g/t2 # oil, finally obtaining a concentrate with a grade of 48.76% and a recovery rate of 49.88%. The floatability of cassiterite and silicate is equivalent. When Mengzi Mining & Metallurgy Co., Ltd. handles tailings, BY-9 is used as collector, P86 is auxiliary collector, sodium carbonate and BY-5 are inhibitors ( The main component is the essence), and a tin concentrate with a tin grade of 53.58% and a recovery rate of 50.12% is obtained. CF is a new type of chelating collector developed by Beijing Research Institute of Mining and Metallurgy. It is suitable for flotation of cassiterite and strontium minerals. It has strong ability to capture cassiterite and has good selectivity, and has good application prospects. SR is a new type of high-efficiency collector for fine-grained cassiterite. For the ore of No. 100 (105) ore body, the agent is used to assist the collector P86, which can achieve the concentrate grade and operation recovery rate of 11.43 respectively. % and 88.72%.
Description
After filtering and heating, the air enters into the hot air distributor at the top of the centrifugal spray dryer, and the hot air will spirally and evenly goes into the drying chamber. The material liquid via high-speed centrifugal atomizer rotates into extremely thin vaporific liquid globule and parallelly flows with the hot air, and then the liquid will be dried into powdery products in a very short time (5-10 seconds). The waste gas after filtering will be expelled through the fan. For the wet organic solvent materials, the spray drying machine can be designed with closed cycle process. It can utilize cyclic nitrogen to dry the materials.
Application
LPG high-speed centrifugal spray dryer is a kind of dedicated equipment for drying emulsion, suspension, paste and solution. This spray drying machine is particularly prominent in drying polymers, resins, dyes, pigments, ceramics, glass, rust remover, pesticides, carbohydrate, dairy products, detergents, fertilizer, organic compounds and inorganic compound liquids. Specifically, this centrifugal spray dryer is applied to the following fields:
Features of Spray Drying Machine
Process Flows of Centrifugal Spray Dryer
Technical Parameter of Centrifugal Spray Dryer
Item/Model
LPG
5
25
50
100
150
200-2000
Inlet Temperature (℃)
≤ 350
Outlet
Temperature (℃)
80
to 90
Maximum
Moisture Evaporation (kg/h)*
5
25
50
100
150
200-2000
Drive
type of Centrifugal Spray Nozzle
Compressed
air drive
Mechanical
drive
Rotating
Speed
25000
22000
21500
18000
18000
15000
Diameter
of Spray Disk (mm)
50
102
108
108
150
180-340
Heat
Source
Electricity
Electricity
Electricity+
steam, fuel oil, gas
Electricity+
steam
Electricity+
steam, fuel oil, gas
Depending
on users
Maximum
Power of Electric Heating (kw)
8
31.5
60
81
99
Overall
Dimensions (L × W × H)
1.8
× 0.93 × 2.2
3 ×
2.7 × 4.26
3.7
× 3.2 × 5.1
4.6
× 4.2 × 6
5.5
× 4.5 × 7
According
to the actual situation
Dry
Powder Recovery (%)
≥ 95
≥ 95
≥ 95
≥ 95
≥ 95
≥ 95
Yutong Company specializes in designing and manufacturing spray drying machine in China. Besides centrifugal spray dryer, we also provide belt dryer, hot air oven, Vacuum Drying Machine, Mixing Machine and Granulating Machine. Our products have obtained several national patents and we have powerful research and development as well as innovation capacity. Additionally, Centrifugal Spray Dryers must undergo a trial run in the workshop, and only those qualified products are allowed to leave the factory.
LPG Centrifugal Spray Dryer Spray Dryer for Chemical Industry, Food and Plant Spray Dryer, Pharmaceutical Spray Dryer, Plastic Resin Centrifugal Spray Dryer, Carbohydrate Spray Drying Machine Jiangsu Yutong Drying Engineering Co.,Ltd , http://www.ytdryer.com
1. Chemical Industry
Potassium chloride (sodium chloride), alkaline dye and pigment, dye intermediate, compound fertilizer, formaldehyde silicic acid, catalyst, sulfuric acid agent, amino acid and white carbon black.
2. Plastic Resin
AB, ABS emulsion, urea resin, phenolic resin, polyethylene, polyvinyl chloride, etc.
3. Food Industry
Rich fat milk, cocoa milk powder, milk replacer, pig blood powder and egg white (yolk)
4. Food and Plant
Oat, chicken liquid, coffee, instant tea, flavoring meat, protein, soybean, peanut protein and hydrolysate
5. Carbohydrate
Corn steep liquor, corn starch, glucose, pectin, malt sugar, potassium sorbate and so on
1.LPG Centrifugal Spray Dryer with fast drying speed can constantly evaporate 95%-98% moisture. The drying time is about 5 seconds to 15 seconds. This drying equipment is especially suitable for thermosensitive substance.
2.This spray dryer has excellent uniformity, liquidity and solubility as well as high purity.
3.This spray drying machine has simple production process and easy operation. After drying, it does not need to grind and screen, which can reduce production procedure and enhance the purity.
