Comprehensive utilization method of stone coal resources

Abstract

A comprehensive utilization method of stone coal resources comprises the following steps: 1, crushing stone coal, and carrying out ball milling; 2, adding water, adding concentrated sulfuric acid, and stacking for slaking; 3, adding water, mixing, and carrying out solid-liquid separation; 4, sintering tailings to make red bricks or a garbage fertilizer; 5, preparing ammonium alum; 6, separating to prepare calcium sulfate dihydrate; 7, separating to obtain a sodium metavanadate solution; and 8, preparing vanadic anhydride, carrying out solid-liquid separation to obtain a liquid which is a sodium chloride solution, and heating for evaporation to obtain industrial salt. A small amount of sulfuric acid is added in the production process, most sulfuric acid is consumed in the stacking slaking process to form sulfate, and sulfate basically has no corrosion, so special protection is not needed. Ion exchange resin is Dow weak alkaline anion resin containing a weak alkaline group, and has the advantages of good adsorption ability, strong selectivity, good regeneration property, environmental protection, and simple and safe operation.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of resources, in particular to a method for comprehensive utilization of stone coal resources. Background technique [0002] Stone coal is a kind of low-quality anthracite with low carbon content and low calorific value, and it is also a low-grade polymetallic symbiotic ore. Transformation and coalification. It looks like a stone, and it is difficult to distinguish it from limestone or carbon shale with the naked eye. It is a combustible organic mineral with high ash content (generally greater than 60%) and deep metamorphism. High-quality stone coal with high carbon content is black, with semi-bright luster, less impurities, and a relative density of 1.7 to 2.2. Stone coal with less carbon content is grayish and extremely dark, mixed with more pyrite, quartz veins, phosphorus and calcareous nodules, with a relative density of 2.2 to 2.8, and the calorific value of stone coal is not high,...

AI Technical Summary

Problems solved by technology

If left to its own devices and neglected to manage and deal with, it will cause public nuisance, destroy the ecological environment, and endanger people's health.

The hazards of urban garbage generally include the following aspects: 1. Garbage stacking not only occupies cultivated land, but also pollutes soil and crops; makes cultivated land lose its use value

2. Garbage pollutes groundwater or enters surface water through rainwater seepage, causing water pollution

3. During the decay process of garbage, a large amount of heat energy is generated, mainly harmful gases such as ammonia, methane and hydrogen sulfide. If the concentration is too high, it...