Inorganic compound Industrial Grade Indirect zinc oxide
Powder CAS No. 1314-13-2
Zno( notes: atomic weight Zn 65.38 plus atomic weight O 15.9994 equals 81.3794)
White hexagonal crystals or powders. Tasteless, nontoxic, fine.
Shanghai liangjiang titanium white product co.,ltd
Typical technical index( Standard: GB/T3494-2012)
Zinc oxide(calculated with dry product)
Metal(calculated with Zn)
Lead oxide (calculated with PbO)
Manganicoxide (calculated with Mn)
Copper oxide (calculated with CuO)
Hydrochloric acid insoluble matter
Screening residues(45μm )
Soluble matter in water
Volatile matter at 105℃
Colour (comparing with the standard sample)
1. Liangjiang brand zinc oxide directly process, takes zinc ingots
No.0 as the raw materials, Under the condition of certain
oxidation, made into zinc oxide by zinc vapor burn. This
process mainly produces zinc oxide 99.7% - 99.5%. Appearance
is white powder, stable under normal temperature, it has good
covering power and tinting strength. Insoluble in water and
alcohol, soluble in acid, alkali ammonia salt solution, both sexes
oxide. To absorb carbon dioxide in the air and water generated with
a white zinc carbonate. Heat the time-varying huang, recover white
2. Liangjiang brand zinc oxide indirectly process, Founded in 1844
by French scientist leclerc (LeClaire), therefore also called the
French process or methods. Zinc oxide indirectly process
,production technology is simple, the cost is strongly influenced
by the raw material. Zinc oxide indirectly process, the particles
diameter from 0.1micros to 10 microns , purity between 99.5%
and 99.7%. According to the output calculation, indirect method is
one of the main production processes of zinc oxide. Zinc oxide
indirectly process can be used in rubbers, varistors, paints and
other industries. The heavy metal content of zinc ingot or zinc
slag directly affects the heavy metal impurity content of product,
low heavy metal content of products, can also be used for animals
feed, medicine, health care and other industries.
No.1 Indirectly process zinc ingots are heated at 1000℃, Melting, vaporizing,importing hot
air, making oxidation, cooling the zinc oxide, cyclone separator,
fine particles are collected by Cloth Bags. Zinc oxide will be
finished. chemical equation as follows,
No.2 Directly process The burning zinc powders, anthracite coal and lime, mixture
in proportions. After the reduction smelting, the mineral powder of
zinc oxide is restored into zinc steam. Recanalization oxide by the
air, zinc oxide collected, zinc oxide will be finished. chemical
equation as follows:
No.3 Wet process Reaction with zinc ash and sulfuric acid, then reaction with
sodium carbonate and ammonia respectively, zinc carbonate and zinc
hydrogen will be finished for zinc oxide. chemical equation as
Firstly, the materials as zinc carbonate, After washing, drying,
calcining, crushing, zinc oxide will be finished, chemical equation
Secondly, the materials as zinc hydrogen, After washing, drying,
calcining, cooling, crushing, zinc oxide will be finished. chemical
equation as follows:
4. The market prospect of zinc oxide:
Zinc oxide is one of the developing rapidly industries in recent 10
years. 10 years ago, not many enterprises of producing zinc oxide,
not more than 20 enterprises of 3000 tons production per year. With
the high-speed development of national economy, much more demands
of zinc oxide domestic china. Also promote the development of
enterprises for zinc oxide production, expanding production
capacity.From the Incomplete statistics in the last five years, the
capacity for zinc oxide indirectly process has been risen up from
100,000 Tons to 300,000 tons; the wet process has been risen up
from 3,000tons to 30,000tons; the total capacity of thress process
has been risen up to 1,000,000 tons. Recent five years, the
capacity of zinc oxide rise up rapidly, especially for indirectly
process, mainly benefit from the auto industry and highway, power
grid, and the rapid development of modern electrical appliances,
digital communications, and other industries. Zinc oxide is manily
used in Rubber tire industry, takes about 60%.Including zinc oxide
indirect ,zinc oxide indirect, zinc oxide wet. Till 2010, the
radial tyre can basically keep 20% growth per one year.The
international first-class tire companies in China Like Michelin,
bridgestone, pirelli, Goodyear , have factories in China. The
demands of zinc oxide for top grade tires, provides a broad market
space for development.
5. Comparison to zinc oxide indirectly process, zinc oxide directly
process, zinc oxide wet process:
Zinc oxide directly process, also called America process, take ores as the materials.
After high temperature reduction, oxidation,zinc oxide will be
finished.Although the ores as raw materials, the disadvantage is
that large energy consumption, product quality is not stable, the
first-grade rate is very low.
Zinc oxide indirectly process,also called French process, take high purity zinc ingots as
the materials. After heat sublimation, oxidation, zinc oxide will
be finished.The advantage is that zinc oxide has high purity,the
disadvantage is that zinc ingot is expensive, large energy
consumption, high cost, low product activity and restricted
Zinc oxide wet process, also called Chemical process. In recent years this process springs
up,many sorts, but in development.Currently widely used sulfuric
acid method, Crude ZnO leaching with sulfuric acid, removing
impurity, purification, the double decomposition reaction by
joining sodium carbonate, intermediate products after drying and
calcination, alkaline zinc carbonate or zinc oxide will be
finished. As the sulfuric acid method improvement, also take
ammonium bicarbonate instead of sodium carbonate as precipitant.The
advantage of this process can have a variety of products, product
quality is good, the disadvantage is, large consumption of sulfuric
acid and sodium carbonate (ammonium bicarbonate), the product cost
is high, the equipment corrosion is serious, the recovery
difficulties for sodium sulfate or ammonium sulfate;If not
It can cause environmental pollutions directly.
Liangjiang brand zinc oxide direclt process, Used in rubbers, phosphating solutions, coatings, paints,
varistors, thin films, thermal conductive materials and other
industries. The heavy metal contents of zinc ingot or zinc slag
directly affect the heavy metal impurity content of product, the
products with low heavy metals, can also be used in animals feed,
medicine, health care and other industries.
Item No.1 Liangjiang brand zinc oxide, request for Phosphating
The phosphating liquid production for the raw materials is very
high.Obviously, more strict for zinc oxide. Reaction with
Phosphoric acid and zinc oxide, if the low purity of zinc in zinc
oxide or the purity of zinc oxide is not enough. Two situations as
No.1 Consumes more raw materials,reaction with Phosphoric acid.
It will affect the purity of the products.
No.2 The lead purity of zinc oxide, higher or lower, affects the
transparency of the phosphating liquid. Because zinc metlas could
be soluble in acids solvent during the heating process.Generally,
use zinc oxide indirectly process. Besides, mainly supply
Zinc Ions,the main components of phosphating film. zinc phosphate
made by reaction with Zinc oxide and phosphoric acid, could be used
in metals surface, Anticorrosive, antirust, that’s zinc phosphate
coating on metal surface, as antirust pigment.
Liangjiang brand zinc oxide, used in rubber products.
Zinc oxide is a surfactant of natural latex.Sometimes used as a
reinforcing agent and colouring agent.According to the different
production methods, it can be divided into zinc oxide indirectly,
zinc oxide directly and zinc oxide activated.It is the most
important inorganic active agent in rubber industry .to be joined
into the rubbers, can not only speed up the curing, also can
improve the degree of crosslinking.Activation for thiazole
sulfonamide, times, guanidine, thiuram promoters.Widely used in all
kinds of rubber products, especially for the products of
transparent rubber and contact with food. Zinc oxide Industrial
production, 50% flow to the rubber industry. Zinc oxide and stearic
acid as an important reactant, one of the raw material in rubbers.A
mixture of zinc oxide and stearic acid strengthened the
hardenability of rubber.Zinc oxide is also an important additive of
car tyres.In addition to the sulfuration, zinc oxide can greatly
improve the heat transfer performance of rubber, which can help the
heat dissipation of the tires, ensure to the driving safety.Zinc
oxide additives as well as to prevent the erosion of rubber from
mold creatures or ultraviolet rays.
Liangjiang brand zinc oxide, used in rubber tyres:
No. 1 Senior black and dark rubber tyres, radial tyres.
Function: Improve the product's thermal conductivity, wear
resistance, tear resistance, tensile strength and other indicators,
and can save about 30% usage of zinc oxide.
No.2 Liangjiang brand zinc oxide, used in rubber products:
- Zinc oxide activated is mainly used as rubber reinforcing agent, so
that the rubber has good corrosion resistance, tear resistance and
- As the promoting agent for rubber vulcanization process, is a
multi-functional rubber compound, mainly used in natural rubber,
synthetic rubber, latex vulcanizing agent and reinforcing agent.
- When used as a curing agent, distributed evenly in the rubber,
large tounch area with hydrogen sulfide, opportunity to carry on
the interface reaction is larger, The active zinc oxide products
have active substances to catalysis, the high transformation of
zinc oxide to zinc sulfide.
- As sulfide antioxidants, to enhance promoter activity,
reducing the amount of promoter, shorten the curing period.
- Accelerate the curing rate, improve the thermal conductivity of the
vulcanizates, sulfurized more thoroughly.
- In rubber industry, especially in the production of transparent
rubber products, zinc oxide activated is an excellent curing agent.
No.3 Liangjiang brand zinc oxide, used in synthetic rubbers:
Function: as activator, vulcanization agent and reinforcing agent,
and the shading effect. Promote rubber vulcanization, activation
and reinforcement, prevent aging, can strengthen the vulcanization
process, improve the rubber tearing resistance, abrasion
No.4 Liangjiang brand zinc oxide, used in natural rubbers:
Function: as vulcanization activator, the promotion of rubber
vulcanization, activation and reinforcing, prevent ageing effect,
can strengthen the vulcanization process, improve the rubber
tearing resistance, wear resistance
No.5 Liangjiang brand zinc oxide, used in latex:
Function: as activator, the promotion of rubber vulcanization,
activation and reinforcing, prevent ageing effect, can strengthen
the vulcanization process, improve the rubber tearing resistance,
No.6 Liangjiang brand zinc oxide, used in white latex:
Function: As the colorants and fillers.
No.7 Liangjiang brand zinc oxide, used in chloroprene rubber:
Function: Vulcanizing agent and compounding ingredient to
increase the heat conduction performance.
No.8 Liangjiang brand zinc oxide, used in the production of shoes
Function: Rubber shoes, boots, rubber gloves and other labor
protection products, to improve the abrasion resistance and anti
aging, increase the service life.
No.9 Liangjiang zinc oxide, used in transparent rubbers and rubber
used for foods.
Function: As the Inorganic activator in transparent rubbers and
rubber used for foods.
No.10 Liangjiang brand zinc oxide, used in Transparent and
Function: As vulcanization activator.
No.11 Liangjiang brand zinc oxide, used in Transparent or coloured
Function: Used in transparent or colored rubbers, irreplaceable
role compared with the traditional surfactant like carbon
black and others.
Liangjiang brand zinc oxide, used in coatings:
In the design of coating recipes, zinc oxide can provide many
high-performance coating recipes for designers.
Zinc oxide is alkaline compound, can be zinc soap by tracing free
fatty acid, and tend to make the paint thicken, will be dissolved
meet inorganic acid or acetic acid.
The refractive index of zinc oxide is higher, has the ability to
absorb ultraviolet light, its tinting strength and hiding power
close to lithopone and titanium pigment, but white color, not
pulverization, good light resistance, good thermal endurance; It
can form coordination compound with carboxylic acid ions in
coatings and thus can reduce the sensitivity of water in the
coating, therefore, zinc oxide can improve the weatherability of
the coating and pulverization resistance ability, suitable for
exterior walls. Zinc oxide could make the product flexibility,
strong, waterproof coating, which can prevent the corrosion of
metals. But unfavorable and free acid more mixed, lest produce more
zinc soap, make coating thick, not easy to brush.
Zinc oxide used in anticorrosion or Marine coatings, the density of
zinc iron compounds can be formed, reduce the speed of the
corrosive medium further infiltration. The main use is rust
In general, small size in Ceramics, paints by drums or cans, used
high purity zinc oxide indirectly; Interior paints, latex paints,
used zinc oxide directly of needles appearance, high oil absorption
value, can improve the suspension performance.
When zinc oxide used in paint, if the amount is too large, will
cause paint viscosity to increases greatly, reduce the stability of
the coatings, by selecting the dispersants, TiO2 variety, basic
material varieties, pH value, the original viscosity and PVC to get
stable coating reciples.
Liangjiang brand zinc oxide, used in ceramics:
Zinc oxide, also called zinc white, an important raw material of
chemical ceramic solutions, in ceramic industy, zinc oxide is
widely used in Brick and tile glaze, Coarse pottery translucent
glaze and Craft cutlery after transparent glaze thick fritted
glaze. Especially the floor tile of wall of pottery and porcelain
glaze and the dosage of low temperature ceramic glaze in the
zinc oxide in glaze:
Zinc oxide in the glaze has the strong help fusion effect, can
reduce the expansion coefficient of glaze and improve the thermal
stability of the product, at the same time can increase the luster
of the glazed with white degree, improve the flexibility of the
glaze. In expanding the horizons of melting, at the same time, can
increase the luster of the glaze. But in the black glaze of
containing chromium, unfavorable use.
Zinc oxide is mainly used in the following respects,
No.1 as the fluxing agent: Zinc oxide used as flux in the low
temperature frit glaze, general usage was 5% ~ 10%, In the low
temperature, raw glaze consumption about 5% in normal operations.
No.2 as opacifying agent: add zinc oxide in glazes containing high
Al2O3, can improve the glaze opacifying sex. Because zinc oxide and
Al2O3 can generate zinc spinel ZnO, Al2O3 crystal. In zinc
opacified glaze, Al2O3 can enhance the whiteness of glaze and
turbidity. SiO2 can improve glaze gloss.
No.3 as crystallization agent: in art crystallization glaze glaze,
is indispensable in the zinc oxide crystallization agent, cooling,
fast on the melt glaze form for larger crystal pattern, very
beautiful. In the crystalline glaze, the usage of zno is as high as
20 ~ 30%.
No.4 as making cobalt blue glaze: zinc oxide in cobalt blue glaze
flux is very important, it can make beautiful sky blue cobalt oxide
formation in the glaze.
No.5 as a ceramic pigment: due to the strong help melt role of zinc
oxide can be used as fluxing agent in the production of ceramic
pigment, mineralizer and glaze carrier.
Zinc oxide useage, pay attention to the following:
No.1 Before use,need to have high temperature calcination,
calcination temperature at about 1200 ℃. If not calcine, directly
added to raw glaze, it will influence the glaze process
performance. You do not need to calcine in join frit material.
No.2 zinc oxide in the glaze , if excessive amount , affects glaze
No.3 zinc oxide have poor effects on certain glaze,
especially chromium glaze.
Shanghai liang jiang titanium white products co., LTD., research
for long time to study that zinc oxide can also has effects in
reducing the bibulous rate of floor tile of wall of pottery and
porcelain. The professors inside course of study thinks, in the
ceramic glaze formula about the fineness of 1000 mesh of zinc oxide
powder, due to the small particle size, specific surface increases,
the lower the water absorption. Of course the higher mesh, the
higher the price of zinc oxide.
3. Liangjiang brand zinc oxide indirectly process:
Currently, the production methods of zin oxide, two categories
(pyrogenic process and wet process). pyrogenic process, incluing
directly and indirectly.
Item one: indirectly process( also called French process), Based at the high purity zinc ingots, sublimation by heats,
oxidation , then zinc oxide will be finished.
Item two: directly process( also called America process), take Zinc concentrate, zinc ash, zinc ore as the raw materials,
after heatings, the briquetting into sands, reduction, oxidation
and cooling powder, baking powder, packing, etc, zinc oxide
directly will be finished.
Item three: wet process also called chemical process. mainly including acid leaching and ammonia. Acid leaching process,
the materials as the coarse zinc or zinc ore, reaction with Dilute
acids,by subtraction, neutralization, drying and calcining, zinc
oxide finished. Ammonia process, the materials as the coarse zinc
oxide or roastings used for desulphurization catalysts, zinc oxide
will be finished. At present, zinc oxide indirectly process takes
70% to 80%, zinc oxide directly process takes 10% to 20%, the wet
process only takes 1% to 2%.we aspires to be the supplier of the world's leading chemical
raw materials, show our value of the products made in China!