Gaofu machinery is made for each tailings dry process technology are efficient and energy-efficient minimum operating costs of the process. Drying of the slag after filling the pit, field, dam, manufacturing building materials, the filtrate to achieve the requirements of recycling，return to continue to use the production, energy and water conservation effect is significant.

The new tailings dry-cleaning process came into being in the following situations: 1, the national policy requirements; 2, tailings warehouse to extend the service life; 3, the need to re-use the closed tailings; 4,need to use dry slag for filling pit, land forming; 5, severe seepage tailings reservoir; 6, severe water shortage area.

Mechanism sand is igneous rock metamorphic rock and water diagenetic rock. Don’t worry about a shortage of materials in use. The biggest advantage of machine-made sand is its large quantity and environmental protection. The equipment of sand making machine can process enough sand and stone according to the needs of users, and the quality is controllable.

Quartz sand is a non-metallic mineral. It is a hard, wear-resistant and chemically stable silicate mineral. Take quartz stone plate as an example: it has the characteristics of no scraping, no pollution, no use. Quartz sand is widely used in glass, abrasives, casting, filter materials, construction, sheet, fireproof materials, etc.

Iron ore is an important raw material for iron and steel production enterprises. Natural ore (iron ore) is gradually selected by crushing, grinding, magnetic separation, flotation, gravity separation and other procedures.

Iron ore is a mineral aggregates containing iron elements or iron compounds that can be used economically.

Ore containing economically available iron elements is called iron ore. There are many kinds of iron ore, such as magnetite (Fe3O4), hematite (Fe2O3) and siderite (FeCO3). After the iron ore sample is dissolved in hydrochloric acid, the iron in the iron ore is transformed into Fe3+. Fe3+ can be reduced by SnCl2+ under strong acidic conditions. After Fe2+ ·Sn2+ was reduced to Fe3+, the methyl orange could also be reduced to hydrogenated methyl orange by Sn2+ and faded. Therefore, methyl orange can indicate the end point of Fe3+ reduction. Sn2 can also continue to reduce the hydrogenated methyl orange to N-N-dimethyl p-phenylenediamine and sodium p-aminobenzenesulfonate. Iron ore is an international