56results about How to "Improve ball forming" patented technology

The invention relates to a method for preparing a pellet by pre-treating high titanium type vanadium-titanium magnetite. The method comprises the following steps of carrying out fine ball milling pretreatment on the high titanium type vanadium-titanium magnetite by using an ore milling device, so as to enable the proportion of the particle size, which is less than 75 microns, of magnetite powder to be greater than 85 to 95 percent; drying, so as to enable the moisture of the high titanium type vanadium-titanium magnetite powder to be less than or equal to 1.3 percent; dry-mixing the dried magnetite powder and bentonite for 15min to 20min, and subsequently, spraying water, and wet-mixing for 15min to 20min; putting a wet-mixed raw material in a condition of 25 to 30 DEG C, braising the material for 25min to 35min, then putting into a pelletizer, and preparing a green pellet with a diameter of 10mm to 12.5mm; drying the green pellet; afterwards, roasting, and raising the temperature of the pellet to 800 to 900 DEG C according to a temperature rise rate of 10 to 12 DEG C per minute; afterwards, raising the temperature to 1,140 to 1,180 DEG C according to a temperature rise rate of 4 to 6 DEG C per minute, and roasting for 10min to 15min; subsequently, lowering the temperature according to a temperature fall rate of 5 to 8 DEG C per minute, taking out after the temperature is fallen to 300 DEG C, and carrying out air cooling. The method provided by the invention can be used for effectively improving the pelletizing performance and the pelletizing speed of the high titanium type vanadium-titanium magnetite, is used for enabling the strength of the green pellet to be best, moreover, is lower in roasting temperature and shorter in time, can be used for meeting the requirement of the compression strength of a mature pellet, and is used for obviously improving the production efficiency of the pellet of the high titanium type vanadium-titanium magnetite.

A preparation method of embedding immobilized effective microorganism gel pellets relates to a microbial cell immobilization method for saprobe denitrification, specifically to a method taking polyvinyl alcohol and sodium alginate as the embedding agent, calcium chloride and boric acid as a cross linker and shell powder as additives to embed the effective microorganism. The invention provides a preparation method of embedding immobilized effective microorganism gel pellets which can not only effectively resolve the defects in the preparation and use process of the gel pellet, but also can effectively improve the biological denitrification effect by taking the effective microorganism as embedding thalli. The method includes: mixing uniformly the embedded agents and additives, dissolving inwater, completely dissolving and mixing uniformly and then cooling to below 40 DEG C, mixing with the centrifuged effective microorganism concentrated bacterium liquor, stirring, and then adding intothe cross-linker to form the gel pellets.

The invention relates to a magnetic separation column-anion reverse flotation optimizing beneficiation new process belonging to the technical field of beneficiation. The magnetic separation column-anion reverse flotation optimizing beneficiation new process comprises the following steps of: obtaining magnetic concentrates by adopting the conventional magnetic separation process; processing the magnetic concentrates by adopting a magnetic separation column, wherein the magnetic separation column selects two products, i.e. an overflow product and a sand setting product; obtaining qualified concentrates by controlling the ascending water and the ore discharge quantity of the sand setting product; also continuously carrying out a flotation regrinding process on magnetic separation column overflows; discarding tailings; enabling the qualified concentrates and magnetic separation column concentrates to be merged into final concentrates. The invention increases a magnetic separation column selection process before reverse flotation aiming at the problems of high cost, environmental pollution, and the like in the traditional magnetic separation-reverse flotation process, thereby effectively reducing the pressure of flotation; the invention obtains 20 percent of the qualified concentrates in advance before the flotation, thereby reducing the flotation ore quantity by 20 percent; and inaddition, the invention also reduces the cost of a flotation procedure by 30 yuan / t, thereby obviously enhancing the economic benefits.

The invention belongs to the technical field of bonding wire materials, and relates to a high spherical bonding silver wire material and a preparation method thereof. The composition of the material comprises silver 99%±0.2%, nickel 0.4%±0.04%, and cobalt 0.4% ±0.05%, calcium 0.01%±0.001%, copper 0.01%±0.001%, gold 0.03%±0.004%, palladium 0.03%±0.004%, lanthanum 0.01%±0.001% and lead 0.0025%±0.0005%, also including other trace amounts The elements include one or more of indium, cerium, yttrium, and selenium. The preparation method of the bonding silver wire material of the present invention makes each metal component melt and synthesizes separately by steps, so that the crystal grains of each component are fully matched during the synthesis process of the bonding silver wire material, and the spheroidization of the synthesized bonding silver wire is improved. , in order to improve the chemical stability and mechanical properties of the alloy wire material.

The invention relates to a high-efficiency composite bentonite for pellets, which consists of the following components in parts by weight: 60-80 parts of bentonite, 12-26 parts of organic cellulose, 5-10 parts of sodium carbonate, 7-14 parts of magnesium oxide, three 4-6 parts of diboron oxide, 5-11 parts of high-temperature explosion-proof agent. The organic cellulose is one or any mixture of carboxymethyl cellulose and hydroxymethyl cellulose. The high temperature anti-explosion agent is an anti-explosion fiber. Compared with the prior art, the beneficial effects of the present invention are: 1) instead of ordinary bentonite, the amount of bentonite binder is reduced from 1.7% to 1.2%; 2) compared with ordinary bentonite, it has the It has the characteristics of high strength and high pelletizing degree, which can increase the grade of finished ore (TFe) by about 0.6%, and reduce the content of SiO2 by about 0.8%; 3) adding magnesium oxide and boron trioxide can effectively reduce the roasting temperature; 4) can reduce the unit consumption , improve the ball forming of green balls, increase the burst temperature of green balls, and improve the metallurgical properties of pellets.