A kind of method for decalcification and purification of high-grade basic magnesium carbonate ore

Abstract

The invention relates to the technical field of purification treatment technologies of basic magnesium carbonate ores, in particular to a calcium reduction purification method of a high-grade basic magnesium carbonate ore, and the method includes the following steps: (1) acquiring coarse grinding ore pulp; (2) carrying out rough flotation on the rough ground ore pulp, and taking the ore pulp product at the next layer as roughing concentrate; (3) carrying out first concentration on the roughing concentrate, and taking the pulp product at the next layer as concentrated concentrate I; (4) carrying out secondary concentration on the concentrated concentrate I, and taking the pulp product at the next layer as concentrated concentrate II; (5) carrying out the third concentration on the concentrated concentrate II, and taking the pulp product at the next layer as concentrated concentrate III; and (6) carrying out the fourth concentration on the concentrated concentrate III, and taking the pulp product at the next layer as final concentrate. The method provides a development and treatment process for basic magnesium carbonate ores for the first time, and thus the content of calcium impurities in high-grade basic magnesium carbonate ores is obviously reduced, and the content of calcium impurities in middlings is further at a relatively low level, so that raw ores can be utilized in a high-efficiency way in terms of quality, and the utilization rate of resources is improved.

Description

technical field [0001] The invention relates to the technical field of development and treatment of basic magnesium carbonate ore, in particular to a method for reducing calcium and purifying high-grade basic magnesium carbonate ore. Background technique [0002] my country is a major exporter of refractory materials, of which the total reserves of magnesite are 3.4 billion tons, accounting for 25% of the world's total reserves, and the mining volume accounts for 50% of the world's total. With the decrease of high-quality magnesite resources, the development and utilization of alternative resources is particularly important. Basic magnesium carbonate (Mg 5 (CO 3 ) 4 (OH) 2 4H 2 O) As a magnesium-containing carbonate mineral, its unique thermal decomposition performance can be used in the field of flame retardancy. During the thermal decomposition process of basic magnesium carbonate, at different temperatures, it successively removes water molecules, hydroxyl groups to...

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