BACKGROUND ART Since the prior art mixed minerals for animal feed contains calcium carbonate mixed therein as an excipient, there are problems which cause a chemical reaction producing hydroxides from calcium carbonate and consequently resulted in deterioration of product when prolonged storing and also reduction of absorptivity when feeding to animals.

DISCLOSURE OF THE INVENTION The present invention was created to resolve the above-mentioned problems with the prior art and specifically described in more detail below.

BEST MODE FOR CARRYING OUT THE INVENTION The subject materials of the present invention are prepared by adding a range of 5 to 25% by weight of an excipient selected from the group consisting of sodium sulfate, powdered cereals, calcium phosphate, charcoal and salt to the mixed minerals for animal feed in which copper sulfate, zinc sulfate, iron sulfate, manganese sulfate and cobalt sulfate were mixed in a predetermined ratio.

EXAMPLES Example 1 Ingredient content (by weight) Copper sulfate 10% Zinc sulfate 25% Iron sulfate 25% Manganese sulfate 20% Cobalt sulfate 1 % Sodium sulfate 19% Example 2 Ingredient content (by weight) Copper sulfate 10% Zinc sulfate 24% Iron sulfate 24% Manganese sulfate 24% Cobalt sulfate 1% Sodium sulfate 17%

Example 3 Ingredient content (by weight) Copper sulfate 10% Zinc sulfate 25% Iron sulfate 25% Manganese sulfate 20% Cobalt sulfate 1 % Salt 19% <BR> <BR> Example 4<BR> Ingredient content (by weight) Copper sulfate 10% Zinc sulfate 25% Iron sulfate 25% Manganese sulfate 20% Cobalt sulfate 1% Powdered cereals 19% Example 5 Ingredient content (by weight) Copper sulfate 10% Zinc sulfate 25% Iron sulfate 25% Manganese sulfate 20% Cobalt sulfate 1 % Powdered charcoal 19%

Example 6 Ingredient content (by weight) Copper sulfate 10% Zinc sulfate 25% Iron sulfate 25% Manganese sulfate 20% Cobalt sulfate 1% Calcium phosphate 19% INDUSTRIAL APPLICABILITY According to the present invention as described above, there is provided advantages that by the addition of sodium sulfate, powdered cereals, calcium phosphate, charcoal or salt as an excipient to the mixed minerals for animal feed, sulfate contained in said mixed minerals was maintained intact and also complete water-solubility thereof was maintained with preventing of deterioration and at the same time, enhancing of absorptivity thereof when feeding to animals, thereby obtaining the effect of improving the quality of said mixed minerals. In particular, when charcoal is used as an excipient of the present invention, there is also provided an advantage of reducing bad smell in the animal excretions.