Preparation method of bone charcoal

Abstract

The invention provides a method for preparing bone charcoal. The bone charcoal is prepared from bone-made calcium hydrogen phosphate which is a by-product in the preparation of bone gelatin. The method comprises the steps of material portioning, mixing, molding and calcining; specifically, the method comprises the following steps: 1, adding bone-made calcium hydrogen phosphate and light calcium carbonate or heavy calcium carbonate according to the weight ratio being 100:(10-40) (wt%); 2, evenly mixing; 3, adding carboxymethyl cellulose (5% solution) accounting for 5% to 10% of the total weight and evenly mixing; 4, pressing the mixed material into a certain shape by a molding machine; and 5, drying and then calcining in a kiln for no less than 30 minutes at 1200 DEG C to 1400 DEG C; and cooling. Compared with the firing of animal bones, waste gases released during the calcining process of the method provided by the invention are less, so that the pollution is reduced; and the method provided by the invention is low in cost. In the current industrial experiment, the natural bone charcoal taking the replacement quantity of 30% to 80% according to different processes is used for manufacturing ceramic products.

Description

technical field

[0001] The invention relates to the field of bone char production. Background technique

[0002] At present, the price of bone charcoal has been at a high level, which directly pushes up the raw material cost of bone china. Natural bone charcoal is made from animal bones by high-temperature calcination. The process of making bone charcoal from animal bones is complicated and the purchase cost is high. In recent years, the price of animal bones is still rising. The ceramic industry is already making a small profit, and the increase in costs has further reduced its profit margins. People long for a new raw material to replace animal bone to make bone char. Contents of the invention

[0003] In order to reduce the cost of bone charcoal manufacture, the present invention provides a method for producing bone charcoal as follows: the bone charcoal is prepared by using bone calcium hydrogen phosphate, a by-product of producing bone gelatin.

[0004] Bone charco...