The influence factors of refractory material mixing homogeneous degree

(1) the powder particle shape of powder particle shape is different, the time and the effect of mixing are not the same, such as approximate spherical particles in the friction force issmall, the speed of relative movement in the process of mixing, so easy to mix evenly; and angular particles within the large friction force, is not easy to mix evenly, compared with the former, mixing time is relatively longer.

(2) The influence of the structural characteristics of mixing equipment for material mixing quality by using wet mixing mill mud, uniform and dense, good plasticity, and using biaxial mixer mixing mud quality is poor.

(3) Mixed with the length of time the general situation, the mixing time is long, the more uniform mixture. Mixing stage, uniformity increases very quickly, when mixing to a certain time, another long time effect on the uniformity of is not obvious. General to join the species more or poor dispersion of mud, mixing time should be longer. For example, clay brickrefractories used in wet grinding machine mixing, time is 4-10min; silica brick material about 15min; magnesia brick material needs 20 – 25min.

The mixing time should not be too long, otherwise there will be the following: 1) the size composition is then broken and change; 2) mud fever and the influence of moisture content, or because the mud is too hot, and the moldings will elastic aftereffect increases when pressurized and spallation occur.

(4) The adding sequence of feeding sequence has great influence on the mixing, if the coarse – fine powder is added at the same time, the fine powder into small particle concentration and the emergence of “white material easy to appear”.

Generally used for feeding sequence:

1) Course feed – water and waste paper pulp – fine powder.

2) Part of pellet feed – water and waste paper pulp – powder – residual particles.

In addition, the reasonable selection of binder and properly controlling the amount and uniformity of mixing the clay.

Improve the heating and heat transfer capability of the refractory brick

Welding of zinc pot can be used when the E-422 electrode (to ensure the chemical composition). Zinc pot four angle should be circular arc, increase the zinc liquid liquidity to avoid local overheating four angles. According to practical experience, zinc pot such a production cycle service life up to 56 months by using electric heating, fuel (gas) heating can reach 45 months, coal-fired heating up to 34 months.

Zinc pot outside of bonded 20mm thickfirebrick of steel wire hot galvanizing zinc liquid in the required temperature of the best (46010) in the range of E. Temperature fluctuation is too big, liquid zinc dross in precipitation in the temperature is reduced, not only a large quantity of slag, and the deterioration of the quality of galvanized steel wire, zinc pot erosion intensified. In order to ensure the liquid zinc temperature changes in steel wire galvanizing temperature relatively small, in the design of zinc pot, the molten zinc quantity is 2025 times the amount of hourly production of galvanized steel wire, that is to say 40t molten zinc pot per hour of galvanized steel wire production cannot exceed 2T. heating mode is a key factor affecting the liquid zinc temperature change the general said, call heating fuel (gas) is better than that of heating, coal-fired heating and the worst, but from the economic point of view is just the opposite. Many manufacturers through years of practice that, if the heat source to heat its loss supplement zinc pot consumption and away in the plating steel wire heat during the process and the zinc pot, the heat in a state of balance, can achieve the ideal effect. And the characteristics of coal are heated by fire temperature rises fast, the fire temperature drop quickly hours. Zinc pot heating zone with all the lateral wall of furnace brick with polyester slice or refractory cement will firmly bonded 20mm thick brick, make flame not directly burning zinc pot wall. In order to improve the thermal efficiency of the refractory brick is coated with a layer of black fireproof coating or polyester slicing the pot wall emissivity for more than 0.9, more easily to heat and heat transfer.