37 results about "Sulfate minerals" patented technology

The invention discloses a method for treating chromium-containing wastewater by using barite adsorbent. The method comprises the following steps of: fusing, crushing and screening a barite mineral material, reacting the barite mineral material by using ferric chloride solution to generate the barite adsorbent for removing chromium ions from sewage containing 50 to 150 mg / L of chromium compound, and shaking the barite adsorbent for 1 hour in a 20 DEG C water bath thermostatic oscillator when the pH is 3 to 4, wherein the removal rate of the chromium ions in the sewage is over 99 percent; and adding a proper amount of barium chloride powder into the barite adsorbent for treating the high chromium content sewage so as to improve the removal rate of the chromium ions. The method has the advantages that: the barite is a most common barium-rich sulfate mineral, the globe surface has rich resources and the cost is low, so the method is convenient for popularization and application; and the barite adsorbent has simple preparation process, convenient operation and high adsorption rate of the chromium ions in the wastewater, can be repeatedly regenerated and recycled, and meets the energy conservation and emission reduction requirements.

The invention discloses a separation method of high-sulfate iron ore. The method includes the following steps: firstly, performing primary ore grinding-classification on the high-sulfate iron ore, anddischarging primary classification overflow products, wherein the ore grinding particle size is controlled at -0.076mm 50%-55%; performing flotation on the primary classification overflow products, selecting sulfides, and obtaining a sulfur concentrate with a TS grade being greater than or equal to 40.0%; carrying out primary low-intensity magnetic separation on floating sulfur tailings to obtaina primary low-intensity magnetic separation iron concentrate, carrying out secondary ore grinding-classification on the primary low-intensity magnetic separation iron concentrate, and carrying out secondary low-intensity magnetic separation on secondary classification overflow products to obtain a secondary low-intensity magnetic separation iron concentrate; performing high-frequency fine screening-elutriation magnetic separation-pulsating magnetic separation and scavenging combined process on the secondary magnetic separation iron concentrate to obtain a magnetite concentrate, and removing sulfur from the sulfates to enter tailings. The scheme of the invention can effectively remove sulfur from the sulfates in the iron ore, can realize efficient separation of magnet minerals and sulfateminerals, realizes sulfur reduction of the iron concentrate, and also ensures the recovery rate of magnetic iron.

The invention provides a high-value comprehensive utilization method of lithium slag, which is aimed at the slag obtained after lithium extraction of spodumene by sulfuric acid method, which comprises the following steps: (1) slurrying and stirring the lithium slag, Make the sulfate minerals in the lithium slag be in a dispersed suspension state; (2) adopt the physical beneficiation method to carry out desulfurization treatment to the resultant of step (1) to obtain the desulfurization slurry and the tailing output slag, so that the slag phase in the desulfurization slurry Sulfur content is not higher than 0.5%; (3) under the condition that the magnetic field strength is 0.5~2.0T, carry out magnetic separation to the desulfurization slurry obtained in step (2), obtain magnetic separation slurry and magnetic separation tailings, make magnetic separation The ferric oxide content in the slurry is reduced to no more than 0.5 percent; then the obtained magnetic separation slurry is concentrated, filtered and dried to obtain the pyrophyllite raw material for glass fiber. The lithium slag treatment method of the present invention is green and environment-friendly, realizes a leap forward in high-value recycling of lithium slag, and has significant economic benefits.

The invention discloses an ultra-fine solid waste-based grouting material and a preparation method thereof, aiming at solving the problem that the micro-cracks existing in the cement-based grouting material are difficult to inject, have poor stability, are easily washed away, have high water separation rate and low stone rate , Long coagulation time and difficult to adjust, slow strength growth, large shrinkage and other technical problems. It is mainly composed of solid waste ultrafine powder, calcined solid waste ultrafine powder, calcium-increased calcined solid waste ultrafine powder, alkali-containing substances, waste sulfate minerals, inorganic salts, thixotropic components, and plastic expansion components. , fluidized components, coagulation components and other raw materials are prepared through the steps of powder mixing and auxiliary addition. The prepared grouting material has good stability, thixotropy, injectability, adjustability of setting time, mechanical properties and durability, energy saving and environmental protection, and is suitable for road subgrade diseases, mining goaf backfilling, anti-seepage blocking Leakage, rock (coal) seam reinforcement and other treatments.

The invention discloses a geopolymer-based artificial defense stone prepared from all wastes and a preparation method thereof, comprising the following raw materials in parts by weight: 288-412 parts of waste silicon-aluminum materials; 85-150 parts of alkali-containing waste ; 29-75 parts of waste sulfate minerals; 1501-1860 parts of recycled aggregate; 216-241 parts of reclaimed water; 0-2 parts of waste fiber; 0-5 parts of agricultural waste. The process of the invention is simple, the prepared artificial stone has no appearance defects, has the advantages of high volume density, high strength (above 34MPa), good weathering resistance, frost resistance and abrasion resistance, and is easy to cast during use. Convenience, good integrity, strong stability, anti-freezing and thawing, anti-weathering, high-speed sand-containing water flow resistance, not easy to get lost under high-speed water flow, it is an ideal substitute for natural stone defense stone.

The invention relates to a production method of cement clinker. The production method is characterized by comprising the steps that yellow phosphorus slag and / or alkaline slag and limestone, shale and sandy loess are mixed, and ground into raw material by a raw material preparation system. The production method of the cement clinker comprises the following steps of recycling the yellow phosphorus slag and / or the alkaline slag, quickly reacting sulfur and alkaline compounds enriched by a rotary kiln system and a preheater system, and balancing the sulfur and alkaline ratio, so that the SO2 (sulfur dioxide) gas is effectively cured, the refractory sulfate mineral is generated, the standard discharge is realized, the solid-phase reaction degree in the rotary kiln is improved, the particle forming of the clinker in calcining is denser, and the quality of the clinker is more stable. The production method of the cement clinker has the advantages that by compounding the industrial solid wastes to prepare the raw material, the high-investment equipment is not used, the standard discharge is realized, the burnability of the cement raw material is improved, and the energy consumption of the clinker is decreased; the yellow phosphorus slag and the alkaline slag are industrial waste slag, the pollution by industrial waste slag is eliminated by the desulfurizing of the waste slag in the cement kiln, and the effect of changing wastes into valuables is realized.