2013年10月31日星期四
2013年8月7日星期三
choose to suit coal iron Magnetic Separator in sorting the technical advantages
In the separator, because you can use U effects thrust and adaptation range is very wide, so the sorting iron has a very impressive gold processing equipment technical advantages. Such as Central Asia, large machinery CTDG type magnetic separator iron mines, and its excellent performance and manufacturing are called, has been in many large and small magnetite selected field has been applied. Mine broke the iron magnetic separator iron mines original drum magnetic separator design principle, the use of open-rocking complex magnetic system enhances the sorting process intensity and speed of the magnetic flip, improved separation efficiency in recent years, magnetic separation equipment developed new products, and its truly no water, no pollution, no aggregation, sorting net, less tailing, high grade, lo w cost, excellent results, has won three national patents.
Magnetic separator iron mines used in today s high-performance NdFeB material as the best magnetic source. NdFeB material has a high magnetic field strength, magnetic blocks single block of up to 5000 gauss magnetic field strength, high magnetic field strength to ensure the recovery of the first channel, a strong and stable magnetic source and high-performance circuit design, the iron In the dressing over 95% of the recovery process; magnetic stability in harsh working environments can maintain lasting stability.
magnetic drum separator
Magnetic separation principle is to be elected into the mines to other materials in addition to iron magnetic separator sorting space, by force and other mechanical forces (such as gravity, centrifugal force, friction, medium resistance, etc.) of the joint action. Suffered magnetic mineral particles s ize and mineral magnetism magnetism itself relevant; non-magnetic mineral particles mainly by mechanical force. Consequent, each movement along different paths, to get separation. Generally suffered magnetic particles in a magnetic field than the size of the magnetic force is proportional to the field strength and gradient.
In recent years the state protection of water resources has intensified, so I plant mainly iron magnetic separator in mine development down the foot work, and constantly develop the latest developments to meet market demand type magnetic iron ore mines machine, the device once the user has made considerable economic benefits, and by the new and old users alike, with coal iron magnetic separator continues to develop, Yu sent mine will conform to the trend of the times, and constantly develop the most advanced coal iron magnetic separator for iron ore selection of recovery operations to provide strong support, and for the steel mills, ironworks, power plants, cement, metallurgy and mineral sand, Sand Hill mine, sand mining, and many other industry s most energy-efficient magnetic iron removal equipment.
suspension magnet
Magnetic separator iron mines used in today s high-performance NdFeB material as the best magnetic source. NdFeB material has a high magnetic field strength, magnetic blocks single block of up to 5000 gauss magnetic field strength, high magnetic field strength to ensure the recovery of the first channel, a strong and stable magnetic source and high-performance circuit design, the iron In the dressing over 95% of the recovery process; magnetic stability in harsh working environments can maintain lasting stability.
Coal iron magnetic separator can be applied early in the lean iron ore broken or subsequent roughing, excluding waste rock; iron in iron smelting for sorting before; hematite reduction roastin g operations will not fully closed reduction ore for re-election; foundry industry in the old sand iron work. Porcelain clay for ceramics in the mixed iron removal; used for the removal of iron mixed in coal. Coal iron magnetic separator can be applied early in the lean iron ore broken or subsequent roughing, excluding waste rock; iron in iron smelting for sorting before; hematite reduction roasting operations will not fully closed reduction ore for re-election; foundry industry in the old sand iron work.
Magnetic Head Pulley
Of China s iron ore resources, 80% of the ore needs to be applied magnetic separation. How to improve the magnetic efficiency and achieve the maximum recovery of iron, the magnetic sector is an important issue to be solved. The coal mine magnetic iron separator as the main equipment and the carrier, its performance determines the efficiency of magnetic separation. Th erefore, many domestic machinery research departments have to look into mine iron magnetic separator in the development and improvement. At present, the domestic coal iron magnetic separator more categories, according to their field strength and the strength of the magnetic field strength, generally can be divided into iron mine field separator (magnetic field strength H = 80 ~ 120kA / m) and strong magnetic fields coal iron magnetic separator (magnetic field strength H = 800 ~ 1600kA / m)
PVC compound stabilizer
Pure PVC resin is extremely sensitive to heat, when the heating temperature reaches 90Y: more, the thermal decomposition occurs slight reaction when the reaction temperature rose to 120C after decomposition intensified in 150C, 10 分钟, PVC resin, the original white gradually turns yellow - red
- Brown - black. PVC resin decomposition process is due to de-HCL reaction caused a chain reaction leading to macromolecules strand breaks. Prevent the thermal stability of PVC thermal decomposition mechanism is through the following aspects to achieve.
(1) by thermal decomposition of PVC capture HCl, to prevent degradation of the catalytic HCl. Click mechanisms lead salt major role, in addition to metal soap, organic tin, pho sphorous and other lipids and epoxy.
(2) replacement of reactive allylic chlorine atom. Metal soap, phosphorous lipids and organic tin can click here Mechanism effect.
(3) react with free radicals to terminate radical reactions. Organic tin and phosphorous mechanism of lipid Click role.
(4) and conjugated double bond, inhibiting the growth of conjugated chain. Organotin mechanism with epoxy Click role.
(5) peroxide decomposition, reducing the number of free radicals. Organic tin and phosphite Click Mechanism effect.
(6) de HCl passivating effect of a catalytic metal ions.
With a stabilizer according to several different mechanisms for thermal stability purposes.
Heat stabilizers Varieties - composite stabilizer
Composite stabilizer can be divided into the following categories:
1 Liquid Ba-Zn composite stabilizer are generally pale yellow to yellow-brown oily liquid, specific gravity of 1.0-1. 1 at room temperature, good heat resistance, pollution from sulfur, with an epoxy plasticizer and used to increase the stabilizing effect, it activation of the blowing agent.
2 liquid calcium zinc composite stabilizer nontoxic liquid calcium zinc stabilizers main ingredients are calcium stearate, castor oil, calcium, zinc stearate, castor oil, zinc and epoxy soybean oil, ultraviolet absorber. Hugh liquid calcium zinc stabilizers are generally used more soluble in organic
Solvent is an aliphatic carbon number of less fat calcium and zinc. Because of different compositions, varied in nature, usually pale yellow to yellow clear oily liquid at room temperature under a specific gravity of 1.0 to 1.05. It is non-toxic PVC stabilizer , mainly used for food packaging films, containers bubble people
Artificial leather stabilizer.
3. Liquid and liquid barium cadmium, barium cadmium zinc composite stabilizer, such composite stabilizer is mainly used for the processing of soft PVC products, the basic components include: (a) barium salt - can be alkylphenols barium, 2 - ethylhexanoic acid, barium, barium laurate (powder lamination), benzoic acid and substituted
Benzoic acid, barium and barium neodecanoate. Barium salt complexes accounted for 6-7%, ie cadmium salts ratio is around 2:1-32 (with metal in mind that weight percent, the same below). (2) cadmium salts - can be 2 - ethylhexanoic acid cadmium, cadmium lauric acid, oleic acid cadmium, phenyl and substituted benzoic acid
Cadmium, cadmium naphthenate, neodecanoate, and cadmium. Cadmium salt complexes about 3-4%. (3) zinc - can be 2 - ethylhexyl zinc, zinc laurate (powder lamination), zinc naphthenate, zinc neodecanoate, benzoic acid and substituted benzoic acid and zinc. Accounts for the composite zinc
0.5-1%. (4) phosphite - may be triphenyl phosphite, diphenyl phosphite, an octyl diphenyl phosphite, a decyl phosphite, tris (nonylphenyl), etc. In the phosphite complexes about 15-20% (by weight), as a chelating agent. (5) Other - including a small amount of
2,6 - t-butyl-p-cresol, bisphenol A, nonylphenol and other phenolic antioxidants and ultraviolet absorbers, and a liquid paraffin, white oil, diesel oil, mineral oil, spindle oil as solvent, and the need Add a small amount of antifoaming agent such as higher alcohols.
Liquid barium cadmium zinc composite stabilizer because different composition, properties are also different. But is generally pale yellow to yellow clear liquid, specific gravity 0.95-1.02 at room temperature, the viscosity of less than 100 cps, freezing point at -15 ℃ or so. Liquid barium cadmium and liquid barium cadmium zinc are similar to each
Excellent thermal, light stability, initial coloration is small, good transparency and color stability. Their stabilizing effect than solid composit e soaps, therefore, may reduce the amount of, usually 2-3 parts, the dust does not occur poisoning, and completely dissolved in the plasticizer generally have
Good dispersion, the precipitation tendency of small. Wherein the liquid barium cadmium zinc early color than the liquid barium cadmium smaller.
4 lead salt composite stabilizer good thermal stability, has been widely used, but small lead salt powder, ingredients and mixed in its dust is inhaled can cause lead poisoning, for which they have developed a new type of scientific and technical personnel The composite lead salt heat stabilizer. This compound additive
Reaction technique using a symbiosis of the three salts, di-salt and the metal soap in the reaction system in the nascent grain size and various lubricants be mixed to ensure the PVC heat stabilizer system in the fully dispersed, and because of the lubricating agent of melting gr anular, but also to avoid
A result of lead poisoning caused by dust. Inclusive of lead salt stabilizer compound required processing heat stabilizer component and a lubricant component, known as a full package heat stabilizer. It has the following advantages: (1) compound heat stabilizer various components can be obtained in the course of production
Sufficiently mixed with the resins greatly improved the uniformity of dispersion. (2) mixing formula, simplified measurement frequency, to reduce the probability and the resulting measurement error caused by the loss. (3) a simple supply and reserve materials, is conducive to production and quality management.
(4) provides the possibility of clean production of products, improving production conditions.
Composite stabilizer security issues
PVC compound stabilizer security issue has been more and more people s attention. PVC compound stabilizer securit y should be three aspects to consider, first, the safety of using the processing of raw materials, the second is the user s security and the third is the safety of waste on the environment. Plus
Workers safety protection may be liquefied by stabilizing agent, paste technology, granulation and other measures to solve them. , Security protection for the user, can be prepared by a stabilizer or a reactive high molecular weight stabilizers to improve its resistance to pumping, but taking into account the effect of stabilizing the molecule
Class of chemical reactions, the above method is not the most appropriate method, the best method is still used high-security stabilizers. Stabilizer is selected, the stabilization process must also be considered in the resin and stabilizing agent, or stabilizers react with each other chemicals generated
Security.
From a variety of security stabilizers see, cadmium stabilizers in the near future will be di scontinued. But a slow process, one of the reasons is that most in the use of cadmium stabilizers when costs are increased by 10% -20%, and cadmium-based stabilizers can not be common to a wide range
The PVC compound. Such as processing a narrow range, but also often need to use auxiliary stabilizer compensate for its performance deficiencies. Now cadmium stabilizers performance has reached a performance of cadmium stabilizers. Calcium zinc stabilizers have been developed rapidly. And in powder, paste and liquid, and
Standard and non-toxic level for sale, second-generation calcium zinc stabilizer in food and pharmaceutical packaging has been replaced by methyl tin tin and zinc base.
Lead stabilizers set its extraction resistance is small, so the use of security when not a problem, but there are security issues harm the environment. Because lead-based stabilizers, low cost, high efficiency, many companies are using this, along with non-lead PVC comp ound stabilizer development, lead salts being no
Environmental toxicity replaced stabilizer. As many countries ban lead, lead-based stabilizers are withdrawn from the market
In short, the composite heat stabilizer help scale production, lead salt heat stabilizer for the development of a new direction. Lead salt stabilizer compound is an important indicator of lead content, current production of lead lead salt stabilizer compound is generally 20% -60%; in PVC plastic door
Window profile production on the amount of 3.5-6 parts
Oxidized polyethylene wax emulsion
oxidized PE WAX First, oxidized polyethylene wax emulsion technical indicators: 1, solid content: 30% -40%; 2, Appearance: light yellow homogeneous liquid; 3, PH value :8-9; 4 Stability: non-hierarchical, not broken milk, no caking.
Second, oxidized polyethylene wax emulsion Applications: oxidized polyethylene wax emulsion used in water-based ink, water-based varnish, agriculture, leather, shoe polish, forestry, wood, garden industry, water-based paint, water-based paint, paper products, adhesives, textile fabric softener and water throughout
Management and other fields.
Third, oxidized polyethylene wax emulsion characteristics: oxidized polyethylene wax emul sion diluted with water in any proportion not hierarchical, not breaking, no caking, acid, alkali, resistance to hard water, soluble strong, emulsion stability, long shelf life, solid content, good dispersion, oxidized polyethylene wax
The emulsion has good scratch resistance, water resistance, stain stick, wear, soft, surface lubrication performance.
Fourth, oxidized polyethylene wax emulsion to use: Spray uniformly oxidized polyethylene wax emulsion for leather, fabric surface, recommended dosage of 5% -10%, the specific dosage may be adjusted according to your product against the system as appropriate.
Five, oxidized polyethylene wax emulsion Packing: 50KG / barrel 200KG / barrel 1000KG / drum or tank
Sixth, the use of advanced production technology and top made ??of advanced materials polyethylene wax emulsion. Having a small particle size (transparent microemulsion), waterproof, coating hardness, sticky, is paint, leather, textiles, excellent i nk additives. It can also be used
Ink, polish, wax polish, liquid shoe polish, liquid car wax polish, liquid floor wax and liquid leather jacket oil fields. oxidized polyehtylene
Solenoid Valve Precautions
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solenoid control valve - China Manufacturer
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I. Security:
1 corrosive media: king should use plastic solenoid valves and stainless steel; For highly corrosive media must use isolation diaphragm. Neutral medium, it should use copper alloy m aterial solenoid valve casing, otherwise the housing desquamation often rust, especially the action infrequent
Occasions. Ammonia can not be used with the valve copper.
2 Explosive environment: to choose the appropriate proof grade products, outdoor installation or dusty places should use waterproof, dustproof varieties.
3 solenoid valve nominal pressure should exceed the maximum working pressure of the tube.
Two. Applicability:
1 media characteristics
1) The quality of gas, liquid or mixed states, which are used in different varieties of solenoid valves.
2) Medium temperature different specifications, otherwise the coil will burn, seals aging, seriously affecting the life of life.
3) medium viscosity, usually 50cSt less.
4) Media cleanliness is not high when the electromagnetic valve should be installed before the recoil filter valve, low pressure fashion can choose straight diaphragm s olenoid valve.
5) If the directional flow medium, and not allowed back.
6) medium temperature should be chosen within the allowable range solenoid valve.
2 pipe parameters
1) under medium flow pipe connection requirements and mode selection valve openings and models.
2) According to the selected flow and valve Kv value DN, also optional with pipe diameter.
3) Working pressure
Minimum working pressure at 0.04Mpa above is optional indirect Pilot; minimum working pressure close to or less than zero must be selected direct-acting or step direct type.
3 Environmental Conditions
1) Setting the maximum and minimum temperature should be selected within the allowable range.
2) the environment of high relative humidity and a drop of rain and so on, should be selected water solenoid valve
3) the environment, often vibration, bumps and shocks occasion should choose special varieties.
4) in a corrosive or explosive environment should be given priority in the use of safety requirements according to selected anti - hair loss
5) If the restricted environment of space, please use the multi-function valve, because eliminating the need for bypass and three manual valves and easy online service.
4 Power Conditions
1) According to the power supply types were selected to AC and DC solenoid valve . Generally AC power access convenient.
2) voltage specifications.
3) Power supply voltage fluctuations are usually used% 10% -15%, DC to allow ±% 10 or so.
4) should be based on the rated power capacity current and power consumption. VA should be noted that when starting the exchange value is higher, the lack of capacity should be preferred indirect electromagnetic valves.
5 control accuracy
A) ordinary solenoid valve only opening and closing two locations in the control of high precision and parameters for a smooth, please choose a number of solenoid valve; three normally open solenoid valve, with Weiqi, fully open and close three kinds of traffic;
Combination of multi-valve with open, wide open, small open, open four traffic.
2) Operating time: refers to connect or disconnect signal to the main valve action completion time.
Third, Reliability:
1, working life, this is not included factory pilot project, are type tests.
2, Operating mode: sub-long work, repeated short-time work and short-time work three.
3, Operating frequency: frequency of demanding action, the structure should be optimized direct acting solenoid valve, the power to listen to the exchange preferred.
4, operating reliability: rigorous professional standards solenoid valve.
Four. Economy:
It selects one of its scale, but it must be in a safe, suitable and reliable bas ed on the economy. Economy is not only the price of products, but also to give priority to their functionality and quality of installation and maintenance and other accessories required fees.
V. Environmental protection:
Environmental pollution and solenoid valves for corrosive fluids, external pilot valve diaphragm valve can be replaced in pollution and work under high viscosity fluids can also have a longer pot life and the body of the actuator diaphragm seal isolates the working fluid and the executing agency for
To pollution and corrosive fluids.
Solenoid valve
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solenoid control valve - China Manufacturer
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solenoid directional valve Action
Transformation heart valve in the valve body relative to the working position, the oil port of the valve body connected or disconnec ted, the actuator to control commutation or the start and stop.
Performance requirements
1 commutation performance within the specified operating conditions, the solenoid valve is energized can reliably commutation, can reliably reset after power failure. (2) the pressure loss by the solenoid valve pressure loss of fluid flow through the valve port solenoid valve flow generated when the throttling losses and loss
Missing components. 3 solenoid valve of the internal leakage amount is the amount of internal leakage in the specified operating conditions, in different working positions, from the high pressure chamber to the low pressure chamber of the amount of leakage. 4 commutation and reset time from the solenoid valve is energized to terminate the commutation
The time required for the reset time is the power from the electromagnetic valve to return to the initial position to the desired time. 5 commutation frequency in the unit time by the max imum number of 6 commutation. Life to the primary solenoid valve with damaged parts, can not be positive
Normal commutation and reset action, or to its main performance indicators deteriorated significantly exceeds the specified index experienced commutation times.
Classification
A wide variety of solenoid valve, according to their number of operating positions and the number of how many channels can be divided into two three-way, two-way, three-way, etc.; their reset and positioning can be divided into spring return, steel ball positioning, without reset spring; accordance with the solenoid valve
The connection can be divided into flanged and threaded connections; press it with electromagnet structure can be divided into dry and wet, each of which have AC, DC, the entire form, and the required power supply voltage and has a good variety, which in its structure, there are many differences
. 1 Press the number of interfaces and switc hing position classification interface refers to the number of valves on a variety of tubing connected to the inlet and outlet, the inlet is usually labeled as P, oil return port is labeled as R or T, the oil port places A, B to represent. Valve spool movable Number of Positions Number of Positions called switch, normally I
We will interface is called a "pass", the spool position is called a "bit." Therefore, according to their number of operating positions and the number of how many channels can be divided into two three, two-way, three-way, etc. (2) Classification by mode of operation to promote the movement of the valve spool with a hand power
, Feet, mechanical, hydraulic, electromagnetic and other methods. 3 categories according to their form of reset and positioning can be divided into spring return type, steel ball positioning, no reset spring. 4 in accordance with the form of the body and the solenoid connections can be divid ed into categories and threaded flange
Connection. 5 Press with solenoid structure their classification can be divided into dry and wet. Classify it: according to the form of the structure: poppet-type valve, spool-type valve, rotary valve type valve
Edit this paragraph structure types
In the hydraulic system is widely used in spool type valve, this valve in here introduces several structures. 1 manual valve: manual valve is to use the manual lever to change the spool position to achieve commutation of two. Motorized valve: also known as OK
Way valve, it is mainly used to control the stroke of hydraulic mechanical moving parts, which is mounted on the table by means of a stopper or cams to force the spool is moved, so as to control the oil flow. Motorized valve is usually two, there are two-, three, four and five-pass
Several, including two two three-way motorized valve is divided into two kinds of normally closed and normally open. 3 solenoid valve: the use of an electromagnet pass, power directly promote the spool to control oil port connectivity state. 4 hydraulic valve 5. Electro-hydraulic valve: the solenoid valve and the hydraulic valve
Combination. Solenoid valve play a leading role, it can change the direction of the control flow, thus changing the position of the hydraulic valve. By operation of the hydraulic thrust of the hydraulic valve can be large, and the main valve can be made very large, allowing a greater flow rate through the
Too. This can be controlled with a small electromagnet larger flow. 6 proportional directional control valve is a proportional solenoid valve in the electromagnetic valve unit outside the electromagnetic force generated by the coil to control the movement of the spool, relying on the control coil current to control the direction of the valve the valve
Displacement of the core, it can control the oil flow direction and flow. Spool type valve 1 valve structure and working principle structure Body: multiple levels undercuts the cylindrical bore Spool: multiple segment ring groove cylinders classification work
Number of points for the position (relative to the valve body of the valve core operating positions): two, three, four points by the number of paths (the main body of external connection port number, not including controlling oil and drain port): two pass, three, four, five pass by control points:
Electromagnetic, hydraulic, electro-hydraulic, mechanical, manual graphic symbols meanings: 1 - a grid that several of the few squares 2 pass - ↑ nowhere - ┴, ┬ both arrows and symbols with a side intercept There are several intersection is a few grid
Pass. Three ports have a fixed orientation and meaning: p - inlet (left) T - back to the oil port (bottom right) AB - work connected with the actuator port (left and right) 2. Slide valve in median function slide val ve function: valve is in the normal position
The valve in the oil port connectivity way valve that is on the three middle way of the oil port connectivity, so called median function. Median function: three valve in the neutral position, the valve means of the communication ports. two way solenoid valve
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