Red iron oxide in the development and application of coatings

Our iron oxide red, the economic environment, the raw material used as a pigment, a perfect fit. Next, we take a look to understand that the development of environmentally friendly and red iron oxide in the coating application bar.
Development and red iron oxide in the  plastic additive coating in the application:
In the oxygen steel converter process, high temperature steam iron in an oxygen rich conditions, the oxidation condensation aerosols or cohesion quickly oxidized to fine spherical oxide particles (spherical surface with minimal free energy), the time to conversion of α-Fe2O3'll be blown or pulled out of the high temperature zone, the gas phase of Fe3O4 and FeO forms preserved to show its ferromagnetic properties. This process is similar to the formation of the production process of synthetic iron oxide red ferric hydroxide gel is dehydrated crystalline α-Fe2O3, and thereby gives the pigment properties.
BOF dust and sludge produced in the polyethylene oxide  process of red iron oxide, is essentially a process of removing impurities to the thick, which is due to formation of dust and mud determined complex environment, the environment in the oxygen steel converter, there must be refractory debris, alkaline flux of dust and splashing droplets of molten steel into the inside of the flue dust mixed with mud and become part of it. Subtle temperature materials often also a steam iron core cohesion, while molten droplets larger than 20 microns can not fully oxidized and become black particles must be removed. Therefore, the processing of dust and mud out of coarse screening, mainly to remove refractory, metallurgical flux debris and small steel particles, hydraulic classification is not fully oxidized primarily to remove  tin stabilizer particles or low iron oxides.
BOF dust and sludge production of iron oxide red paint with good performance, small size, easy to disperse, with a stable nature, several Baidu can withstand high temperatures, especially with excellent anti-settling properties, mainly from two aspects: One converter iron red with good magnetic properties, the magnetic domain of the magnetic proximity unit will be arranged in a certain orientation of the magnetic force of the magnetic gel, excluding the caking tendency of sink to the bottom; the other hand, the pigment fine particle size, large specific surface area, surface free energy large, fully wetted by the resin wrapped, suspension excellent, not easy to sink to the bottom, thereby enhancing the stability of the paint.

Broad field of application of titanium dioxide

 Titanium dioxide is a very broad field of application, then the application of titanium dioxide are used in the end what areas and what areas? If you want to know, please read our article carefully to see if you want to know more about titanium dioxide anatase titanium dioxide or magnesium hydroxide flame retardant  related information like him to pay attention to our official website to learn about the latest relevant information, in the hope that our website give you some help.
Titanium dioxide has a high refractive index, particle size distribution of the particles is ideal, with good hiding power and good coloring white pigment widely used in paints, rubber, plastics, paper, inks, daily chemical, electronics, micro-electromechanical and environmental protection industries.
Paint industry: paint industry is the largest user of titanium dioxide. Among them, rutile titanium dioxide coatings industry is mainly consumed. Production of titanium dioxide paint, colorful, high hiding power, color dose, the province focused, variety, stable media can play  yellow iron oxide a protective role, and can improve the strength and adhesive film to prevent cracking, prevent UV and moisture permeability However, to extend membrane life.
Plastics industry: In addition to titanium dioxide plastic, plastic products, can improve the heat resistance, light resistance, weather resistance, improved plastic products physical and chemical properties, and improve the mechanical strength and prolong life. 3 Paper industry: paper industry is a major consumer of titanium dioxide. As the paper burden, mainly used for fine paper and tissue paper. In this file add titanium dioxide, can make paper with good whiteness, gloss, high strength, thin and flexible, printing does not penetrate, the quality of light. Paper is generally used without a surface treatment of the titanium dioxide anatase type titanium dioxide, can be used as optical brighteners, thus increasing the brightness of the document. But requires the use of rutile titanium dioxide rolling treated paper surface in response to light and heat requirements.
4, advanced ink: titanium dioxide or iron oxide yellow  advanced essential white pigment ink. Solid ink containing titanium dioxide does not change color, surface wettability is easily dispersed. Ink industry has been using rutile titanium dioxide anatase.
Chemical industry, chemical fiber and textile fiber textile industry is another important application of titanium dioxide. Chemical fiber titanium dioxide is mainly used as a matting agent. As sweet red, gold anatase, anatase general. The titanium fiber surface usually do not require treatment, but some special varieties to reduce photochemical reaction of titanium dioxide, titanium dioxide, in order to prevent degradation of the photocatalytic effect of the fiber, the need for surface treatment.

aluminum sulfate removal of heavy metal fluoride contamination

Wastewater containing fluoride and heavy metal pollution of water pollution in the two pollution hazards for humans and the environment can not be overlooked . The aluminum sulfate is such a common coagulant can remove heavy metals in sewage and fluorine pollution.
Aluminum sulfate application  magnesium hydroxide flame retardant in heavy metal wastewater aluminum sulfate is actually a heavy metal chelating agent to polymer processing technology of heavy metals and inorganic fluorine reagent processing technology combined with an extremely simple approach . And symbiotic aluminum sulfate precipitation method using the principle, containing arsenic, fluorine and heavy metals and heavy metal zinc borate flame retardant  waste generated by adjusting the pH precipitation method symbiosis removed.
The fluorine-containing aluminum sulfate aluminum sulfate treatment method applied fluoride concentration on high or larger flow of wastewater, if the individual dosing calcium fluoride , precipitation is very slow , and the flocculant alone will increase the cost of processing , so commonly used is first using chemical precipitation, aluminum sulfate and then adsorbent or coagulant treatment, so fluorine content down to 10 mg / L or less. Chemical precipitation method is relatively simple, easy to handle , low cost effective, mainly for treatment of high concentration fluoride wastewater . Coagulation law generally applies only to lower fluoride wastewater treatment . Adsorption method is mainly applied to a small quantity of process water .
Heavy metals in wastewater treatment technology and red iron oxide  precipitation, soda sulphide , iron salt method , chelate resin method , etc. are the most frequently used and aluminum sulfate precipitation method . Currently both aluminum sulfate and heavy metal fluoride removal from wastewater and examples of new technologies , but are rare. The use of polymer heavy metal chelating agent / inorganic reagents while removing heavy metals from wastewater and fluorine. Aluminum sulfate as a chemical coagulant , may be used for the treatment of waste water containing fluorine is low , the adsorption of heavy metal pollution of subsidence . The large amount of fluoride wastewater treatment , you can use aluminum sulfate plus lime, or together constitute polyacrylamide coagulant chemical adsorption precipitation treatment method for processing.

How to detect the purity aluminum potassium sulfate and its components

Potassium aluminum sulfate, aluminum sulfate is a product of the same is acidic chemicals , have adsorption sedimentation, coagulation and sedimentation in water treatment agent. Then for measuring it , is  dibasic lead phosphite not it the same?
Potassium aluminum sulfate Detection
For the detection of the purity aluminum potassium sulfate is usually generated using barium chloride , barium sulphate precipitation. Testing the purity of aluminum potassium sulfate , he first dissolved in water, if barium chloride , in that the resulting precipitate sulfate not only impurities ( not complete reaction of aluminum sulfate or potassium sulfate ) , aluminum potassium sulfate is also out of the ionization ah. Then a semi-permeable membrane filtration filter can be removed alum gel . Using the  PVC heat stabilizer for window mass of barium sulfate ( precipitated barium sulfate ) to obtain the sulfate ion amount of material , in turn, can calculate the mass of potassium aluminum sulfate , aluminum sulfate can calculate the mass fraction of potassium
How to detect the composition of aluminum potassium sulfate
In the laboratory, how should we determine potassium alum ionic components it contains ? 1 , test sulfate : with BaCl2 solution , a white precipitate , adding HNO3 insoluble. 2 , inspection Al3 +: addition of NaOH produce amorphous white flocculent precipitate is dissolved in excess , leads to CO2 reappeared . 3 , test K +: Add sodium tetraphenylborate , a precipitate is proved K +. Add NaClO4 also produced a white precipitate. Or flame reaction can epoxidation of soybean oil  also be used , boron beads experiments are also available.
For potassium aluminum sulfate component detection methods , the same applies to the aluminum sulfate and ammonium alum water for testing. This is because they have adsorption, can produce gel deposition , and chemical raw materials with similar properties . However, the choice of the detection agent will be somewhat different.

PVC (UPVC) injection

Application of stainless steel casting mold, chromium content of at least 13%, preferably 16%, at least 55 Rockwell hardness, hard chrome-plated steel mold can be processed to form a protective effect.
After production, the application of  titanium dioxide anatase a mild lye carefully cleaned and then sprayed mold surface quality oil spray or siliceous spray.
4, the melt temperature
Measure of available air-launched by 185-205 ℃ range. Smoothness of the material from the injection can know the exact upvc melt temperature. If the material in the injection after the rough, as evidenced by the material is not homogeneous (plastics insufficient), which  heat stabilizer for panel means that the temperature set too low; eg, injection newcomer bubble and smoke a lot of smoke, it means the temperature is too high.
5, the injection speed
Slower rate of fire, or cause excessive shear degradation of materials, the use of upvc produce extremely smooth, thick-walled products should be used multi-stage injection mold filling speed.
6, the screw speed
Should match the molding cycle may be. Screw Diethylene glycol dibenzoate  face velocity shall not exceed 0.15-0.2m / s
7, the back pressure
Up to 150bar, the lower the better, common to 5bar.
8, the retention time
At a temperature of 200 ℃, barrel residence time can not exceed five minutes. When the temperature is 210 ℃, cylinder residence time should not exceed 3 minutes.

Deposited zinc stearate

Chemical reagents zinc stearate is often due to improper storage in the storage and deterioration . Some reagents hygroscopic and deliquescence or hydrolysis ; others easily with oxygen in the air , carbon dioxide or other gases diffusion in which to react , and some reagents by  chromium oxide light and ambient temperature will degenerate . Therefore, must be based on the different nature of the reagent , respectively, to take appropriate measures for safekeeping. Preservation methods generally have the following :
1 sealed
After the reagents are generally drawn tightly with a stopper , in particular volatile substances ( such as hydrochloric acid , ammonia ) , and many low boiling point organic compounds ( such as acetone, formaldehyde , acetaldehyde , chloroform, benzene, etc. ) must be tightly closed tightly . Some hygroscopic or a case of steam generating strong hydrolysis reagents such as phosphorus pentoxide , anhydrous AlCl3 , etc., only iron oxide yellow  to close tightly , but also wax seal .
In the air can be spontaneous white phosphorus stored in the water. Reactive metals potassium, sodium To save in kerosene .
2 with brown bottle full bloom and placed in the shade
Light or heat perishable reagents ( such as potassium iodide , hydrogen peroxide , and bromine , chlorine ) to be stored in a brown bottle and placed in a cool place , preventing it from decomposition of deterioration. 3 Dangerous Drugs keep other medicines stored separately
Are easy to explode, burn , toxic, corrosive and  tio2 anatase radioactive and other hazardous substances, as well as by external factors can cause severe chemical accidents , are all hazardous chemicals . They must be stored separately stored , such as perchloric acid can also organics , or prone to explosion. Strong oxidizing substances and organic solvents can corrode the rubber , not in full bloom in a glass bottle with a rubber stopper . Easily affect the purity of the reagent erosion glass reagent , such as hydrofluoric acid , fluoride salt ( potassium fluoride , sodium fluoride , ammonium fluoride ) and caustic alkali (potassium hydroxide, sodium hydroxide ) , shall be stored in polyethylene plastic bottle or a glass bottle coated with paraffin .
Purity: more than 98.0% purity
Specifications : Solid : 5g, 10g , such as different specifications ( specifications , customers can call options )

Introduction of polypropylene flame retardants

Describes the polypropylene (PP) flame retardant type and mechanism of resistance ene agent PP summarized research progress and trends. Efficient, low toxicity ,
Low smoke , low cost, versatile, new composite "green" flame retardant PP 21st century focus of the study .
Polypropylene (PP) is a hydrocarbon material , heat of combustion , it is not entirely produced by burning smoke PVC lubricant  and toxic gases, its application is limited . In order to improve flame retardant PP , broadening its field of application , you must add flame retardants.
A , PP fire retardant classification
PP flame retardant more categories, according to the basic performance is divided into inorganic and organic flame retardants ; according to high and low molecular weight divided into low molecular weight and high molecular weight flame retardant ; divided by use of additive flame retardant and reactive flame retardant . Which , by the use of method of classification is more commonly used classification methods . Flame retardant is added to the polymer during processing with a flame retardant
Liquid or solid , including phosphate, halogenated hydrocarbons , the advantage of easy to use for a wide range ; those containing reactive flame retardant is Cl,, Br, P and other elements and reactive flame retardant class of compounds , they are copolymerized with the resin to give a resin flame retardant. Two , PP flame approaches, methods and mechanisms
( A ) , flame retardant PP pathway mainly through three kinds of ways to achieve [ 1 ] : ( 1 ) using the additive flame retardant , flame retardant added over mechanical mixing the polymer to achieve flame purpose ; ( 2 ) use of reactive flame retardant, a flame retardant as a reactive monomer that participate in the reaction ,
Grafted to the polymer main chain or side  chain , the modified polymer has a flame retardant ; ( 3 ) a flame retardant polymer itself . (B ) , the basic method of flame retardant PP basic methods include: ( 1 ) use of foam or non- foam refractory material coating the surface of PP material , to
With oxygen or thermal isolation ; ( 2 ) through the modification of the modified PP matrix material flame retardant. The second method is the main method . ( Three ) , flame retardant mechanism
1 . Termination of a chain reaction mechanism
PP combustion , the general decomposition  Sodium stearate of hydrocarbons. Further oxidation of hydrocarbons at high temperatures, decomposition of free radical HO •. HO • The chain reaction
Makes the flame should continue . Halide decomposition of hydrogen halide (HX). HX can capture high-energy HO • and produce X • and
H 2O, while X • R • reacts with the polymer and the HX, but also capture the HO •. This cycle enables highly active HO • Less
Less will eventually contribute to the ripple cut HO • terminate hydrocarbon combustion flame to achieve the purpose . For PP, halides
Usually without the use of fluoride chloride or bromide or iodide . Because fluoride too lively , the formation of molecular fluorine and very stable
Iodine forming compound is unstable , it is rarely used.
2 . Mechanism of protective film
Flame temperature in the combustion swells into a layer of non-combustible protective film covering the surface of the material , isolated from the air and fire retardant . In
Phosphate flame retardant in the PP phosphate, halogen hydrocarbon ester. They differentiate to form a layer of porous insulating film coke , separated
Absolutely air to prevent heat transfer , and thus play a role in flame .
3 . Cooling mechanism
Flame retardant polymer surface can  PVC heat stabilizer for window melt at a lower temperature , the latent heat absorbed or endothermic reaction , consume a lot of heat , from
And to prevent burning. Such as Al (OH) 3 can play in PP flame retardant effect. It is a non- flame-retardant filling aids . When the temperature
No more than 200 ℃, hydration molecules and Al (OH) 3 combined with very strong, even at 230 ℃ for continuous heating will not significantly decompose.
When the polymer is exposed to heat , one of the Al (OH) 3 hydrated plays the role of heat . When the temperature is higher than 250 ℃, the polymer combustion,
Al (OH) 3 decomposes to absorb a lot of heat , and  Glycerol monostearate generate water . Water vapor , and absorb a large amount of heat , thereby reducing the polymer
Temperature of PP pyrolysis gas combustion products, the speed is very slow , less than the concentration of combustion can be maintained , thereby preventing burning.