Non-oxide ceramic spray drying granulation tower LPG-20

Non-oxide ceramic spray drying granulation tower LPG-20 non-oxide ceramics (such as carbides, nitrides) is a large class of important ceramics in advanced structural ceramics, its performance is superior, especially in the special field has an extremely important role, and will play an increasingly important role
in the future high-tech field.

In particular, carbide ceramics, such as boron carbide, silicon carbide, tungsten carbide, chromium carbide, etc.
, with their high hardness, wear resistance and chemical corrosion resistance, have received more and more widespread attention, and are used
in abrasives, various corrosion-resistant containers and pipelines, as well as mechanical industrial bearings, cutting tools and mechanical sealing components.

[0003] Such ceramics to covalent bonds mainly, the binding strength is very high, not easy to prepare, or the preparation of its high-performance products need to cost a high cost, is not conducive to large-scale production
.

As an important part of the production process of high-performance ceramics, molding has attracted attention
.

Excellent molding process, can obtain high density and uniform ceramic blank, is conducive to obtain high performance, large size ceramic products
.

Spray granulation, on the other hand, provides a good foundation
for an excellent molding process.

Spray drying granulation method of boron carbide powder, including the following steps: each raw material is configured according to the following weight percentages: boron carbide micronized 30-69%, toner 0.
5-15%, silicon carbide powder 0-15%, dispersant 0-8%, binder 0.
1-10%, defoamer 0-10%, water 30-69%, and then placed in the ball mill; Control the ball grinding mixing time, ball mill speed, ball material, and make a slurry suitable for spraying with dry granulation; The slurry is directly sprayed into the spray drying granulator, and the boron carbide slurry is dried into boron carbide granulator
by controlling the slurry inlet, outlet temperature and pressure or centrifugal turntable speed.

Ceramic spray drying method with good granulation moldability, the process is simple, which is conducive to the subsequent acquisition of high-density blanks and the preparation
of dense ceramics.

The technical solution used is: Step 1, ingredients: non-oxide material powder, toner, dispersant, binder and water according to the following mass percentage ingredients: non-oxide powder 35%-65%, toner 0-3%, dispersant 0-4%, binder 0.
05-4.
5%, deionized water 30-60%; Step two, the use of ball milling, high-speed stirring or ultrasonic dispersion of the raw materials in step 1 to make a stable ceramic slurry, the viscosity of the resulting slurry is not more than 5dpa.
s; spray dry granulation, the slurry prepared in step 2 through the peristaltic pump control feed speed into the spray drying granulator, by controlling the slurry inlet, outlet temperature and pressure, the boron carbide granulation material is prepared;