4 results about "Low magnesium" patented technology

The invention provides a preparation method and application of a low-grade copper-nickel ore magnesium removal inhibitor, and belongs to the technical field of copper-nickel ore magnesium removal, and the preparation method comprises the following steps: mixing starch, ethylenediamine, methyl acrylate and maleic anhydride according to a preset mass ratio to form a mixed material; adjusting the pH value of the mixed material to a preset range to enable the mixed material to form a colloid precursor; adding an initiator into the treated colloid precursor to initiate a colloid polymerization reaction; raising the temperature of the initiated reaction system to a preset reaction temperature, and performing constant-temperature reaction for a preset time to form a reaction product with a colloid adsorption structure; and filtering and drying the reaction product in sequence to obtain the magnesium removal inhibitor with the capacity of targeted adsorption of magnesium minerals. According to the method, the efficiency and effect of the magnesium removal inhibitor are improved through targeted adsorption, then magnesium-containing minerals in the low-grade copper-nickel ore are effectively inhibited, and finally the copper-nickel ore with the low magnesium content is obtained.

This utility model discloses a magnesium material preheating and feeding device, which includes a horizontally placed preheating cylinder. A perforated feeding conveyor belt is transversely arranged inside the preheating cylinder. Multiple sets of radially extending movable frames are symmetrically arranged on both sides of the perforated feeding conveyor belt on the preheating cylinder. Heating rods are installed at the inner ends of the movable frames, and driving mechanisms are connected to the outer ends of the movable frames to drive them to move radially along the preheating cylinder. This magnesium material preheating and feeding device can preheat the magnesium material during the feeding and conveying process, avoiding excessive reactions caused by excessively low magnesium material temperatures during the feeding process, which would affect the processing effect.

The application discloses a kind of boron magnesio-iron ore containing uranium magnesium extraction beneficiation methods, adopt multi-section closed circuit crushing classification, stage grinding gradient magnetic separation, strong magnetic weak magnetic combined impurity removal, targeted magnesium extraction combination process, first simultaneously realize the efficient recovery of iron, uranium valuable elements, then grade enrichment magnesium-containing minerals from iron tailings, finally through the targeted purification process of precipitation and high gradient magnetic separation impurity removal, dehydration, calcination preparation high-purity magnesium powder;The application has the advantages that: whole-process closed loop is efficient, realize the collaborative comprehensive recovery of iron, uranium, magnesium in boron magnesio-iron ore, and the problems of low magnesium recovery rate, insufficient product purity, complex process and high environmental pressure in the existing process are solved; No strong acid and strong alkali and other high-pollution reagents are used throughout the process, the equipment combination is compact, the process parameters are controllable, the energy consumption and production cost are low, it is suitable for industrial large-scale production, and the comprehensive utilization rate of boron magnesio-iron ore resources is improved.

The invention provides a method for improving magnesium ion conversion rate and enhancing magnesium hydroxide production efficiency, and relates to the technical field of magnesium hydroxide preparation. The method comprises the following steps: preparing the waste bischofite into a solution, adding solid sodium chloride or potassium chloride, carrying out a dissolution reaction, adding ammonia water after the pH and the conductivity of a reaction system are completely stable, ending the reaction when the pH and the conductivity of the reaction system are not increased any more, filtering to obtain magnesium hydroxide, collecting a mixed solution containing sodium and potassium, and concentrating for recycling. According to the method, the primary conversion rate of magnesium ions can be increased by 10% or above, and the production efficiency of magnesium hydroxide under the same condition can be increased by 15% or above. The method can solve the problem of low magnesium ion conversion rate in the production process of preparing magnesium hydroxide by a chemical method, reduces the energy consumption in the reaction process, improves the production efficiency of magnesium hydroxide, and has great economic value.